125 results on '"Samuel AJ"'
Search Results
2. Control of NAD+ homeostasis by autophagic flux modulates mitochondrial and cardiac function
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Zhang, Quanjiang, Li, Zhonggang, Li, Qiuxia, Trammell, Samuel AJ, Schmidt, Mark S, Pires, Karla Maria, Cai, Jinjin, Zhang, Yuan, Kenny, Helena, Boudina, Sihem, Brenner, Charles, and Abel, E Dale
- Published
- 2024
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3. TARGETED, LCMS-BASED METABOLOMICS FOR QUANTITATIVE MEASUREMENT OF NAD+ METABOLITES
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Samuel AJ Trammell and Charles Brenner
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Biotechnology ,TP248.13-248.65 - Abstract
Nicotinamide adenine dinucleotide (NAD+) is a coenzyme for hydride transfer reactions and a substrate for sirtuins and other NAD+-consuming enzymes. The abundance of NAD+, NAD+ biosynthetic intermediates, and related nucleotides reflects the metabolic state of cells and tissues. High performance liquid chromatography (HPLC) followed by ultraviolet-visible (UV-Vis) spectroscopic analysis of NAD+ metabolites does not offer the specificity and sensitivity necessary for robust quantification of complex samples. Thus, we developed a targeted, quantitative assay of the NAD+ metabolome with the use of HPLC coupled to mass spectrometry. Here we discuss NAD+ metabolism as well as the technical challenges required for reliable quantification of the NAD+ metabolites. The new method incorporates new separations and improves upon a previously published method that suffered from the problem of ionization suppression for particular compounds.
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- 2013
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4. Nicotinamide Riboside Is a Major NAD+ Precursor Vitamin in Cow Milk
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Trammell, Samuel AJ, Yu, Liping, Redpath, Philip, Migaud, Marie E, and Brenner, Charles
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- 2016
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5. Control of NAD+ homeostasis by autophagic flux modulates mitochondrial and cardiac function.
- Author
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Zhang, Quanjiang, Li, Zhonggang, Li, Qiuxia, Trammell, Samuel AJ, Schmidt, Mark S, Pires, Karla Maria, Cai, Jinjin, Zhang, Yuan, Kenny, Helena, Boudina, Sihem, Brenner, Charles, and Abel, E Dale
- Subjects
NAD (Coenzyme) ,MITOCHONDRIA ,HOMEOSTASIS ,HEART diseases ,HEART failure ,NICOTINAMIDE - Abstract
Impaired autophagy is known to cause mitochondrial dysfunction and heart failure, in part due to altered mitophagy and protein quality control. However, whether additional mechanisms are involved in the development of mitochondrial dysfunction and heart failure in the setting of deficient autophagic flux remains poorly explored. Here, we show that impaired autophagic flux reduces nicotinamide adenine dinucleotide (NAD
+ ) availability in cardiomyocytes. NAD+ deficiency upon autophagic impairment is attributable to the induction of nicotinamide N-methyltransferase (NNMT), which methylates the NAD+ precursor nicotinamide (NAM) to generate N-methyl-nicotinamide (MeNAM). The administration of nicotinamide mononucleotide (NMN) or inhibition of NNMT activity in autophagy-deficient hearts and cardiomyocytes restores NAD+ levels and ameliorates cardiac and mitochondrial dysfunction. Mechanistically, autophagic inhibition causes the accumulation of SQSTM1, which activates NF-κB signaling and promotes NNMT transcription. In summary, we describe a novel mechanism illustrating how autophagic flux maintains mitochondrial and cardiac function by mediating SQSTM1-NF-κB-NNMT signaling and controlling the cellular levels of NAD+ . Synopsis: How autophagy safeguards cardiac structure and function to prevent heart failure remains unclear. This genetic work links a novel connection between deficient autophagic flux in cardiomyocytes to reduced availability of the cellular metabolite NAD+ , suggesting novel tractable avenues for intervention. Depletion of autophagy-related protein 3 (ATG3) in cardiomyocytes causes cardiac dysfunction and early mortality in mice. ATG3 depletion reduces mitochondrial metabolism and biogenesis, preceding age-dependent cardiac dysfunction. Reduced autophagy leads to accumulation of SQSTM1, activation of NF-κB subunit RELA, and increased transcription of the NAD+ metabolic enzyme NNMT. Increased NNMT catalyzes the competing conversion of NAD+ precursor NAM to MeNAM, leading to NAD+ deficiency. Autophagy induction prevents NNMT induction and NNMT inhibition or NMN supplementation restore cardiac and mitochondrial dysfunction when autophagy is defective. Deficient autophagy reduces NAD+ availability in cardiomyocytes via a SQSTM1-NF-κB-NNMT axis, contributing to mitochondrial dysfunction and heart failure. [ABSTRACT FROM AUTHOR]- Published
- 2024
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6. The Implications of Handwashing and Skin Hygiene on Infectious Disease Dynamics: The African Scenario
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Olalekan Chris Akinsulie, Victor Ayodele Aliyu, Ibrahim Idris, Samuel Ajulo, Oluwagbemisola Olukogbe, Chizaram Ukauwa, and Jesuferanmi Mary Akinsulie
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hygiene ,handwashing ,infectious disease prevention ,Africa ,public health ,Industrial medicine. Industrial hygiene ,RC963-969 ,Industrial hygiene. Industrial welfare ,HD7260-7780.8 - Abstract
Infectious diseases are largely preventable, yet they continue to pose a significant threat to public health, particularly among vulnerable populations in developing countries. Basic hygiene practices, especially hand and skin hygiene, have been shown to significantly reduce the risk of the cross-transmission of infections, including those caused by multi-drug-resistant organisms. In light of the growing global concern about antimicrobial resistance, there is an urgent need to review and reinforce these practices. This study provides a general overview of the role that hand hygiene practices play in decreasing infectious diseases by conducting a comprehensive review. Multiple online databases, including Google Scholar, Scopus, and Web of Science, were searched using relevant keywords such as “hygiene practices”, “infectious diseases”, “public health”, “Africa”, and “sanitation”. After filtering the search results for relevancy, selected studies were narratively synthesized to present the latest data on hand hygiene and its impact on infectious diseases. Strengthening hand and skin hygiene, along with environmental sanitation and preventive measures, can help reduce the spread of nosocomial infections. By emphasizing the importance of these fundamental hygiene practices, particularly in regions where the burden of infectious diseases is highest, the development of antibiotic-resistant diseases can be prevented, improving patient safety, and enhancing public health outcomes. Adopting comprehensive hygiene policies, including regular handwashing, is crucial for reducing the prevalence of infectious diseases and improving health outcomes in developing countries.
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- 2024
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7. Is neighbourhood income inequality associated with maternal mental health? A longitudinal analysis of pregnant and new mothers living in Calgary, Alberta
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Samuel AJ Lowe, Sheila McDonald, Ambikaipakan Senthilselvan, Candace IJ Nykiforuk, Radha Chari, and Roman Pabayo
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Epidemiology ,public health ,Mothers ,General Medicine ,Alberta ,Cohort Studies ,Mental Health ,anxiety disorders ,Pregnancy ,depression & mood disorders ,Income ,Humans ,Female ,Retrospective Studies - Abstract
ObjectivesRising income inequality is a potential risk factor for poor mental health, however, little work has investigated this link among mothers. Our goal was to determine if neighbourhood-level income inequality was associated with maternal mental health over time.DesignSecondary data analysis using a retrospective cohort study design.Setting and participantsData from the All Our Families (AOF) ongoing cohort study in the city of Calgary (Canada) were used, with our sample including 2461 mothers. Participant data were collected at six time points from 2008 to 2014, corresponding to Main outcome measuresAnxiety symptoms measured using the Spielberger State Anxiety Inventory, and depressive symptoms measured using the Edinburgh Postnatal Depression Scale and the Centre for Epidemiologic Studies-Depression Scale.ResultsMultilevel regression modelling was used to quantify the associations between neighbourhood-level income inequality and continuous mental health symptoms over time. For anxiety symptoms, the interaction term between neighbourhood Gini and time was significant (β=0.0017, 95% CI=0.00049 to 0.0028, p=0.005), indicating an excess rate of change over time. Specifically, a SD increase in Gini (Z-score) was associated with an average monthly rate increase in anxiety symptom scores of 1.001% per month. While depressive symptom scores followed similar longitudinal trajectories across levels of income inequality, we did not find significant evidence for an association between inequality and depressive symptoms. There was no evidence of a cross-level interaction between inequality and household income on either outcome.ConclusionIncome inequality within neighbourhoods appears to adversely impact the mental health trajectories of pregnant and new mothers. Further research is needed to understand the mechanisms that explain this relationship, and how interventions to reduce income inequality could benefit mental health.
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- 2021
8. Is neighbourhood income inequality associated with maternal mental health? A longitudinal analysis of pregnant and new mothers living in Calgary, Alberta
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Lowe, Samuel AJ, primary, McDonald, Sheila, additional, Senthilselvan, Ambikaipakan, additional, Nykiforuk, Candace IJ, additional, Chari, Radha, additional, and Pabayo, Roman, additional
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- 2021
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9. Structures, processes and outcomes between first referral and referral hospitals in low-income and middle-income countries: a secondary preplanned analysis of the FALCON and ChEETAh randomised trials
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Rajeev Sharma, Neha Mishra, Simon Cousens, Sanjay Gupta, Thomas Pinkney, Neil Smart, Jonathan Cook, Hemanth Kumar, Peter Brocklehurst, Mohammed Bashir, Dmitri Nepogodiev, Adesoji O Ademuyiwa, Philip Alexander, Laura Magill, Rachel Moore, Stephen Tabiri, Joseph Yorke, Dion Morton, Aneel Bhangu, Bryar Kadir, Naveen Sharma, Punam Mistry, Joshua Arthur, Muneer A Malik, Tracy Roberts, Elisee Rwagahirima, Christian Urimubabo, Ewen Harrison, Vijay Kumar, Julia Brown, Pollyanna Hardy, Amit Mahajan, Pratik Solanki, James Glasbey, Himani Gupta, Omar Omar, Joana Simoes, Sivesh K Kamarajah, Adesoji Ademuyiwa, Felix Alakaloko, Olumide Elebute, Omolara Faboya, Justina Seyi-Olajide, Anita Thomas, David Lissauer, Zainab Imam, George Ihediwa, Zainab O Imam, Felix M Alakaloko, Pradeep Zechariah, Suraj Surendran, Olatunji O Lawal, Mohammed Adnan, Savleen Kaur, Faustin Ntirenganya, JC Allen Ingabire, Lawani Ismaïl, Emmy Runigamugabo, Djifid Morel Seto, Paul Wondoh, Charles Dally, Kwabena Agbedinu, Florence Dedey, Enoch Tackie, Frank Enoch Gyamfi, Anthony Davor, Akinlabi Ajao, Omobolaji Ayandipo, Olalekan Ajai, Mobolaji Oludara, Muhammad Daniyan, Danjuma Sale, Lawal Abdullahi, Olabisi Osagie, Adedeji Fatuga, Muzzammil Abdullahi, Manish Pathak, Prashant Singh, Rita Jain, Kwaku Boakye-Yiadom, Kazeem Atobatele, Ayokunle Ogunyemi, Olabode Oshodi, Christopher Bode, Omobolaji O Ayandipo, Akinlabi E Ajao, Godwin Akaba, Gabriella Hyman, Deepak Singh, Olukemi Akande, Sivesh Kathir Kamarajah, Naseem Akhtar, José A Flores, Donna Smith, Olatunji Lawal, Hadijat Olaide Raji, Zafar Khan, Matthew Francis, Emmanuel Williams, Pardeep Kumar, Oliver Samuel, María Paz Muñoz, Arun Chaturvedi, Sameer Gupta, Puneet Prakash, John Raphael, Funmilola Wuraola, Olalekan Olasehinde, Murlidhar V Pai, Deepak Jain, Anwar Sadat Seidu, Victor Ifeanyichukwu Modekwe, Jideofor Okechukwu Ugwu, Lukmon Amosu, Akan Inyang, Michael Amoah, Boateng Nimako, Dhruva Ghosh, Neil Winkles, Olabisi O Osagie, Karolin Kroese, Olubunmi Ogein, Mustapha Yakubu, Vasanth Mark Samuel, Cecil Thomas, Enono Yhoshu, Vishal Michael, William Bhatti, Swati Daniel, Jyoti Dhiman, Atul Suroy, Christopher O Bode, George C Ihediwa, Adaiah Soibi-Harry, Benedetto Osunwusi, Elizabeth Li, Sonia Mathai, Deepak Singla, Farhanul Huda, Aisha Mustapha, Anisah Yahya, Samuel Mensah, Puneet Pareek, Bernard Ofori, Souliath Lawani, Oluwafunmilayo Adeniyi, Opeyemi Rebecca Akinajo, Richard Ofosu-Akromah, Olumide Adeniyi, Adewale O. Adisa, Natacha Boumas, Fareeda Galley, Frank Enoch Gyamfi Parvez D Haque, Antonio Ramos de la Medina, Chukwuma Okereke, Ronald Tubasime, Felicity Brant, Sohini Chakrabortee, Parvez D Haque, Emily Heritage, Carmela Lapitan, Rachel Lillywhite, Pierre Sodonougbo, Pamphile Assouto, Michel Fiogbe, Houenoukpo Koco, Serge Metchinhoungbe, Hodonou Sogbo, Hulrich Behanzin, Yannick Tandje, Sosthène Kangni, Cyrile Kpangon, Marcelin Akpla, Hugues Herve Chobli, Blaise Kovohouande, Gérard Agboton, Rene Ahossi, Raoul Baderha Ngabo, Nathan Bisimwa, Covalic Melic Bokossa Kandokponou, Mireille Dokponou, Francis Moïse Dossou, Corinne Dzemta, Antoine Gaou, Roland Goudou, Emmanuel Hedefoun, Sunday Houtoukpe, Felix Kamga, Eric Kiki- Migan, Ismaïl Lawani, René Loko, Afissatou Moutaïrou, Pencome Ogouyemi, Fouad Soumanou, Pia Tamadaho, Mack-Arthur Zounon, Luke Aniakwo Adagrah, Bin Baaba Alhaji Alhassan, Mabel Pokuah Amoako-Boateng, Anthony Baffour Appiah, Alvin Asante-Asamani, Benedict Boakye, Samuel A Debrah, Donald Enti, Rahman Adebisi Ganiyu, Patience Koggoh, Richard Kpankpari, Isabella Naa M. Opandoh, Meshach Agyemang Manu, Maison Patrick Opoku Manu, Martin Tangnaa Morna, John Nkrumah, Michael Nortey, Emmanuel Owusu Ofori, Elizaberth Mercy Quartson, Esther Adjei-Acquah, Eric Agyemang Vera Agyekum, Rebecca Adjeibah Akesseh, Forster Amponsah-Manu, Ato Oppong Acquah, Leslie Issa Adam-Zakariah, Esther Asabre, Ruby Acheampong Boateng, Barbara Koomson, Ataa Kusiwaa, Emmanuel Yaw Twerefour, James Ankomah, Frank Assah-Adjei, Anthony Appiah Boakye, Godfred Fosu, Godwin Serbeh, Kofi Yeboah Gyan, Isaac Omane Nyarko, Zelda Robertson, Ralph Armah, Christopher Asare, Delali Akosua Gakpetor, Victoria Sena Gawu, Ambe Obbeng, Doris Ofosuhene, Dorcas Osei-Poku, Diana Puozaa, Arkorful Ebenezer Temitope, Regina Acquah, James Amoako, Akosua Dwamena Appiah, Mark Aseti, Charles Banka, Samuel Dadzie, Derick Essien, Romeo Hussey, Jemima Kwarteng, Naa Anyekaa Sowah, Grace Yeboah, Cynthia Yeboah, Kwame Gyambibi Addo, Enoch Appiah Akosa, Percy Boakye, Christian Larbi Coompson, Brian Gyamfi, Bismark Effah Kontor, Christian Kyeremeh, Ruth Manu, Elijah Mensah, Friko Ibrahim Solae, Gideon Kwasi Toffah, Dorcas Otuo Acheampong, Jane Acquaye, Michael Adinku, Anita Eseenam Agbeko, Emmanuel Gyimah Amankwa, George Amoah, Juliana Appiah, Alex Ayim, Emmanuel Kafui Ayodeji, Jonathan Boakye-Yiadom, Edward Amoah Boateng, Christian Kofi Gyasi-Sarpong, Naabo Nuhu Noel Hamidu, Iddrisu Haruna, Naa Kwarley, Agbenya Kobla Lovi, Bertina Beauty Nyadu, Dominic Opoku, Anita Osabutey, Robert Sagoe, Samuel Tuffour, Yaa Tufour, Francis Akwaw Yamoah, Abiboye Cheduko Yefieye, Nii Armah Adu-Aryee, Faisal Adjei, Erica Akoto, Elikem Ametefe, Joachim Kwaku Amoako, Godsway Solomon Attepor, George Darko Brown, Benjamin Fenu, Philemon Kwame Kumassah, David Olatayo Olayiwola, Theodore Wordui, Nelson Agboadoh, Fatao Abubakari, Cletus Ballu, Charles Gyamfi Barimah, Guy Casskey Boateng, Prosper Tonwisi Luri, Abraham Titigah, Frank Owusu, Raphael Adu-Brobbey, Abdul-Hamid Labaran, Junior Atta Owusu, Vivian Adobea, Amos Bennin, Fred Dankwah, Stanley Doe, Ruth Sarfo Kantanka, Ephraim Kobby, Kennedy Kofi Korankye Hanson Larnyor, Edwin Osei, Prince Yeboah Owusu, Clement Ayum Sie-Broni, Marshall Zume, Francis Atindaana Abantanga, Darling Ramatu Abdulai, Daniel Kwesi Acquah, Emmanuel Ayingayure, Imoro Osman, Sheba Kunfah, Gbana Limann, Shamudeen Alhassan Mohammed, Sheriff Mohammed, Yakubu Musah, Emmanuel Abem Owusu, Abdul-Hafiz Saba, Edwin Mwintiereh Ta-ang Yenli, Arun Gautham, Alice Hepzibah, Grace Mary, Dimple Bhatti, Karan Bir, Tapasya Dhar, Sunita Goyal, Goyal Ankush, Monika Hans, Parvez Haque, Samuel Konda, Anil Luther, Shalini Makkar, Kavita Mandrelle, Partho Mukherjee, Reuben Rajappa, Ravinder Thind, Alen Thomas, Arti Tuli, Sreejith Veetil, Esther Daniel Mark Jesudason, K Priyadarshini, Latha Madankumar, Rohin Mittal, Ida Nagomy, Rajesh Selvakumar, Bharat Shankar, Moonish Sivakumar, Rajeevan Sridhar, Devabalan Titus, Manisha Aggarwal, Parth Dhamija, Vinoth Kanna, Ashwani Kumar, Gurtaj Singh, Josy Thomas, Amos Dasari, Priya Jacob, Elizabeth Kurien, Arpit Mathew, Danita Prakash, Anju Susan, Rose Varghese, Rahul Alpheus, Ashish Choudhrie, Nitin Peters, Subrat Raul, Rakesh Vakil, Wenceslao Ángeles Bueno, Francisco Barbosa Camacho, Aldo Bernal Hernández, Ana Bogurin Arellano, Edgar Cortes Torres, Clotilde Fuentes Orozco, Erick González García de Rojas, Alejandro González Ojeda, Bertha Guzmán Ramírez, Michel Hernández Valadez, Diego Luna Acevedo, Rubén Morán Galaviz, Oscar Olvera Flores, José Pérez Navarro, Kevin Pintor Belmontes, Fernando Ramirez Marbello, Luis Ramírez-González, Laura Reyes Aguirre, Ramona Rojas García, Eduardo Valtierra Robles, Reyes Cervantes Ortiz, Gonzalo Hernandez Gonzalez, Rosa Hernandez Krauss, Luis Hernández Miguelena, Marco Hurtado Romero, Isaac Baltazar Gomez, Celina Cuellar Aguirre, Alejandro Cuevas Avendaño, Luis Dominguez Sansores, Hector Ortiz Mejia, Laura Urdapilleta Gomez del Campo, Claudia Caballero Cerdan, David Dominguez Solano, Rafael Toriz Garcia, Mariana Barreto Gallo, Ana Cortes Flores, Alejandro Gonzalez Ojeda, Monica Jimenez Velasco, Rozana Reyes Gamez, Roque Lincona Menindez, Alberto Navarrete Peón, Irani Durán Sánchez, Diana Gonzalez Vazquez, Maria Martínez Lara, Laura Martinez Perez Maldonado, Alejandra Nayen Sainz de la Fuente, Antonio Ramos De la Medina, Khadija Ado, Mohammed Aliyu, Lofty-John Anyanwu, Mahmoud Magashi, Abubakar Muhammad, Saminu Muhammad, Bello Muideen, Idris Takai, Onyekachi Ukata, Opeoluwa Adesanya, David Awonuga, Olushola Fasiku, Chidiebere Ogo, Moruf Abdulsalam, Abimbola Adeniran, Grace Eke, Esther Momson, Francisca Nwaenyi, Olufunmilade Omisanjo, Yusuf Oshodi, Yemisi Oyewole, Omotade Salami, Omolara Williams, Victoria Adeleye, Opeyemi Akinajo, David Akinboyewa, Iyabo Alasi, Oluwole Atoyebi, Olanrewaju Balogun, Orimisan Belie, Andrew Ekwesianya, Francis Ezenwankwo, Adesola Jimoh, Jubril Kuku, Oluwaseun Ladipo- Ajayi, Ayomide Makanjuola, Olayanju Mokwenyei, Samuel Nwokocha, Rufus Ojewola, Abraham Oladimeji, Thomas Olajide, Oluwaseun Oluseye, Aloy Ugwu, Ochomma Egwuonwu, Okechukwu Ekwunife, Victor Modekwe, Chukwuemeka Okoro, Chisom Uche, Kenneth Ugwuanyi, Chuka Ugwunne, Akeem Adeleke, Wilson Adenikinju, Akinfolarin Adepiti, Adewale Aderounmu, Abdulhafiz Adesunkanmi, Adewale Adisa, Samuel Ajekwu, Olusegun Ajenjfuja, Jerrie Akindojutimi, Akinbolaji Akinkuolie, Olusegun Alatise, Olubukola Allen, Micheal Archibong, Olukayode Arowolo, Deborah Ayantona, Ademola Ayinde, Olusegun Badejoko, Tajudeen Badmus, Amarachukwu Etonyeaku, Emeka Igbodike, Omotade Ijarotimi, Adedayo Lawal, Fayowole Nana, Tunde Oduanafolabi, Olaniyi Olayemi, Stephen Omitinde, Owolabi Oni, Chigozie Onyeze, Ernest Orji, Adewale Rotimi, Abdulkadir Salako, Olufemi Solaja, Oluwaseun Sowemimo, Ademola Talabi, Mohammed Tajudeen, Francis Adebayo, Oseremen Aisuodionoe- Shadrach, Lazarus Ameh, Ndubuisi Mbajiekwe, Felix Ogbo, Samson Olori, Samuel Sani Abu Sadiq, Nancy Tabuanu, Martins Uanikhoba, Godwin Chiejina, Ekpo Edet, Mary Isa, Faith Iseh, Adams Marwa, Sunday Ogbeche, Edima Olory, Gabriel Udie, Joseph Udosen, Usang Usang, Olukayode Abayomi, Rukiyat Abdus-Salam, Sikiru Adebayo, Olanrewaju Amusat, Kelvin Egbuchulem, Hyginus Ekwuazi, Peter Elemile, Taiwo Lawal, Solomon Olagunju, Peter Osuala, Bamidele Suleman, Augustine Takure, Lukman Abdur-Rahman, Nurudeen Adeleke, Muideen Adesola, Rafiat Afolabi, Sulaiman Agodirin, Isiaka Aremu, Jibril Bello, Saheed Lawal, Abdulwahab Lawal, Hadijat Raji, Olayinka Sayomi, Asimiyu Shittu, Jude Ede, Sebastian Ekenze, Vincent Enemuo, Matthew Eze, Uchechukwu Ezomike, Emmanuel Izuka, Okezie Mbadiwe, Ngozi Mbah, Uba Ezinne, Iweha Ikechukwu, Okoi Nnyonno, Philemon Okoro, Igwe Patrick, Oriji Vaduneme, Abhulimen Victor, Salathiel Kanyarukiko, Francine Mukaneza, Deborah Mukantibaziyaremye, Aphrodis Munyaneza, Gibert Ndegamiye, Ronald Tubasiime, Moses Dusabe, Emelyne Izabiriza, Hope Lydia Maniraguha, Christophe Mpirimbanyi, Josiane Mutuyimana, Olivier Mwenedata, Francine Uwizeyimana, Job Zirikana, Aime Dieudonne Hirwa, Elysee Kabanda, Salomee Mbonimpaye, Christine Mukakomite, Piolette Muroruhirwe, Georges Bucyibaruta, Gisele Juru Bunogerane, Sosthene Habumuremyi, Jean de Dieu Haragirimana, Alphonsine Imanishimwe, Violette Mukanyange, Emmanuel Munyaneza, Emmanuel Mutabazi, Isaie Ncogoza, Jeannette Nyirahabimana, Mary Augusta Adams, Richard Crawford, Chikwendu Jeffrey Ede, Maria Fourtounas, Morapedi Kwati, Mpho Nosipho Mathe, Ncamsile Anthea Nhlabathi, Hlengiwe Samkelisiwe Nxumalo, Paddy Pattinson, Nnosa Sentholang, Mmule Evelyn Sethoana, Maria Elizabeth Stassen, Laura Thornley, Cheryl Birtles, Mathete Ivy, Cynthia Mbavhalelo, Zain Ally, Abdus-sami Adewunmi, Maria Picciochi, Michael Bahrami-Hessari, Didier Ahogni Benin, Aristide Ahounou, K. Alassan Boukari, Oswald Gbehade, Thierry K Hessou, Sinama Nindopa, M.J. Bienvenue Nontonwanou, Nafissatou Orou Guessou, Arouna Sambo, Sorekou Victoire Tchati, Affisatou Tchogo, Semevo Romaric Tobome, Parfait Yanto, Isidore Gandaho, Armel Hadonou, Simplice Hinvo, Montcho Adrien Hodonou, Sambo Bio Tamou, Marie-Claire Kouroumta, Enrif Malade, Anne stredy Mkoh Dikao, Joel Nzuwa Nsilu, Nathan Bisimwa Mitima, Cyrille Kpangon, Stephane Laurent Loupeda, Mamonde Victorin Agbangla, Sena Emmanuel Hedefoun, Thierry Mavoha, Juvenal Ngaguene, Janvier Rugendabanga, Rish Romaric Soton, Martin Totin, Mouhamed Agbadebo, Irene Akpo, Hubert Dewamon, Martin Djeto, Aissatou Hada, Monsede Hollo, Albert Houndji, Anasthasie Houndote, Sylvestre Hounsa, Expedit Kpatchassou, Hugues Yome, Mohamed Moussa Alidou, Bonheur Dossou Yovo, Robert Guinnou, Souleymane Hamadou, Nabil Moussa, Boniface Cakpo, Lolyta Etchisse, Emery Hatangimana, Moise Muhindo, Katia Sanni, Agossou Barthelemy Yevide, Hermann Agossou, Fiston Basirwa Musengo, Bill Armstrong Alia, Arnaud Alitonou, Lucien Agbanda, Julien Attinon, Marcel Gbassi, Nounagnon Rene Hounsou, Derick Esssien, Yakubu Mustapha, Kojo Nunoo-Ghartey, Luke A Aniakwo, Margarey N M Adjei, Yvonne Adofo-Asamoah, Meshach M Agyapong, Thomas Agyen, Baba A B Alhassan, Mabel P Amoako-Boateng, Josephine Ashong, Joseph K Awindaogo, Benjamin B Brimpong, Makafui S C J K Dayie, Wendy W Ghansah, Jude E Gyamfi, Vincent Kudoh, Philip Mensah, Isabella N Morkor Opandoh, Martin T Morna, Emelia Odame, Emmanuel O Ofori, Sandra Quaicoo, Elizabert M Quartson, Cynthia Teye-Topey, Makafui Yigah, Safia Yussif, Vera O Agyekum-Gyimah, Eric Agyemang, Arko Akoto- Ampaw, Temitope E Arkorful, Moses A Dokurugu, Nanabanyin Essel, Aja Ijeoma, Emmanuel L Obiri, Karen N D Quarchey, Leslie Adam-Zakariah, Aaron B Andoh, Ruby A Boateng, Atta Kusiwaa, Adeline Naah, Ato Oppon-Acquah, Benjamin A Oppong, Emma A Agbowada, Ameley Akosua, O Lawrence Dorcas Acheampong, Frank E Gyamfi, Bertina B Nyadu, Samira Abdulai, Nii A Adu-Aryee, Joachim K Amoako, Nicholas T Aperkor, Wilfred K Asman, Godsway S Attepor, Antoinette A Bediako-Bowan, George D Brown, Victor K Etwire, Benjamin S Fenu, Philemon K Kumassah, Linda A Larbi-Siaw, Josephine Nsaful, David O Olatola, Sandra E Tsatsu, Iddrisu I A Abdul-Aziz, Johnson Akunyam, Gilbert A G Anasara, Charles G Barimah, Guy C Boateng, Ponala W Kwabena, Seidu M Kwarteng, Prosper T Luri, Kennedy Ngaaso, David K D Ogudi, Collins Kyeremeh, Clement Sie-Broni, Saba Abdul-Hafiz, Daniel K Acquah, Shamsudeen M Adams, Mohammed S Alhassan, Munira Amadu, Samuel A Asirifi, Martin Awe, Millicent Azanlerigu, Mathias K Dery, Yenli Edwin, Abantanga Atindaana Francis, Aloysius Maalekuu, Hawa Malechi, Ibrahim Mohammed, Kareem Mumuni, Bernard A Ofori, Jonathan I K Quansah, Napoleon Bellua Sam, Anwar S Seidu, Shekira Yahaya, Emmanuel Kojo Acquah, Jaabir Alhassan, Christian L Coompson, Addo K Gyambibi, Ametepe Jeffery-Felix, Bismark E Kontor, Gifty Naah, Carmen Noufuentes, Abraham Sakyi, Ramkaran Chaudhary, Sanjeev Misra, Dharma R Poonia, Kirti K Rathod, Mahaveer S Rodha, Nivedita Sharma, Subhash C Soni, Vaibhav K Varsheney, Jeevan R Vishnoi, Deepak K Garnaik, Manoj J Lokavarapu, Rohit Ranjan, Rajkumar K Seenivasagam, Shanky Singh, Raunak Verma, Suzan John, Jeffery A Kalyanapu, Ananta Kutma, Sanish Philips, Arun K Gautham, Deepak S Singh, Eunice S Abraham, Chetana Chetana, Prashant Dummala, Chinta S Gold, Jurgen Jacob, Jeremiah N Joseph, Elizabeth N Kurien, Priya Mary, Arpit J Mathew, Amy E Mathew, Danita D Prakash, Ashwin Sukumar, Niyah Syam, Alisha Bhatt, Dhruva N Ghosh, Ankush Goyal, Monika A Hans, Jyoti Jyoti, Karan Kumar, Vivin Daniel Sam, Ravinder Singh Thind, Sreejith K Veetil, Rahul Williams, D Sreekar, Esther R Daniel, Smitha E Jacob, Mark R Jesudason, Pushplatha Kumari, Soosan Prasad, Srujan Sharma, Moonish V Sivakumar, Paul Trinity, Sudheer Kanchodu, K Leshiini, Sundeep S Saluja, Ashok K Attri, Ishan Bansal, Monika Gureh, Simran Kapoor, Harmanjot Kaur, Simrandeep Singh, Viju John, Nivesh Agrawal, Uttkarsh Kumar, S Abhishek, Vikram Sehrawat, Gaurav Thami, Stanley Mathew, P S Prabhu, P T Sundeep, Shiv Rajan, Mohit Singh, Abhilasha Tripathi, Philip V Alexander, A Vijay, Moloti Kichu* Ismavel, Carolin V Solomi, Rahul A Alpheus, Ashish Victor Choudhrie, Rashmi Jacob Gunny, Susan Joseph, Nitin J Peters, Neha Pundir, Ram Samujh, Hafsa I Ahmed, Gowhar Aziz, Nisar A Chowdri, Rayees A Dar, Robindera Kour, Imtiyaz Mantoo, Asif Mehraj, Fazl Q Parray, Najmus Saqib, Zamir A Shah, Rauf A Wani, Komal Rautela, Nishu Singh, Priyanka Chowdhury, Sona Chowdhury, Pragyanmai Nayak, Bipradas Roy, Andrea S Alvarez Villaseñor, Kriscia V Ascencio Díaz, Victor J Avalos Herrera, Francisco J Barbosa, Elyoenai Bonilla Ahumada, Irma V Brancaccio, Miguel A Calderón, Guadalupe Castillo Cardiel, Guillermo A Cervantes, Gabino Cervantes Guevara, Enrique Cervantes Perez, Maria Chávez, Jonathan M Chejfec, Luis R Cifuentes, Ana O Cortés, Edgar J Cortes, Tania A Cueto, Andrea E Cueto, Esteban Cueva Martinez, Paulina Domínguez Barradas, Isaac Esparza Estrada, Paola Flores Becerril, Luis A García, Benjamín García Reyna, Eduardo Gómez Sánchez, Jaime L González, Eduardo González Espinoza, Fanny Y González, Cristhian S Guerrero, José A Guzmán, Bertha G Guzmán, Mario J Guzmán, DanielA Hérnandez Alva, SilviaA Ibarra Camargo, JuanC Ibarrola Peña, Martin Islas Torres, Jorge Jiménez Tornero, ZayraM Lara Pérez, Roberto Mares País, MelP Mellado Tellez, RobertoC Miranda Ackerman, Damián Mora Santana, Gilberto Morgan Villela, Rodrigo Nájar Hinojosa, Cesar Nuño Escobar, Itzel Ochoa Rodríguez, Angelica Ortega Barreiro, Jacqueline Osuna Rubio, Luis RPacheco Vallejo, VíctorH Pérez Bocanegra, JoseV Pérez Navarro, Francisco JPlascencia Posada, MaríaA Quirarte Hernández, LuisR Ramirez Gonzalez, Emilio AReyes Elizalde, EveliaV Romo Ascencio, Cornelio Ruelas Bravo, CarlosB Ruiz Velasco, JoséA Sánchez Martínez, Guillermo Sanchez Villaseñor, JoséI Sandoval Pulido, AlejandroG Serrano García, LuisO Suárez Carreón, JuanJ Tijerina Ávila, JesusO Vega Gastelum, MelissaL Vicencio Ramirez, MariaF Zarate Casas, CarlosJ Zuloaga, Fernández del Valle, JesusAntonion Aguilar Mata, MiguelAntonio Calderon Vanegas, RocioGuadalupe Cano Arias, Carlos Colunga Tinajero, Fernanda Diaz Samano, Fernando Duque Zepeda, BrendaVanessa Enriquez Barajas, Gerardo Gallardo Banuelos, MarijoseDe CristoGonzalez Calvillo, Francisco Ibanez Ortiz, Maryzela Lazo Ramirez, Gerardo Lopez Arroyo, LauraOlivia Montano Angeles, DavidGiovannyI Morales Iriarte, AngeloFernando Mortola Lomeli, Jose EstebanOrozco Navarro, Jaime Orozco Perez, Damaris Orozco Ramirez, LauraGabriela Pena Baolboa, Jesus Pizarro Lozano, Guillermo Yanowsky Reyes, Monica N Castillo, Ana CamilleG Dominguez, Dorihela H Mellado, Jesus FlavioM Morales, Luzdel CarmenM Namur, Jose AlbertoA Pesquera, LauraMartinez Perez Maldonado, Antonio RamosDe laMedina, Katya Bozada-Gutierrez, AnaFlorencia Casado-Zarate, Roberto Delano-Alonso, Jose Herrera-Esquivel, Mucio Moreno-Portillo, Mario Trejo-Avila, Roland Kevin CethorthFonseca, Edgard Efren LozadaHernandez, Bruno Crocco Quiros, JairoArturo Rodriguez Ramirez, Gabriela Ambriz-González, MitziR Becerra Moscoso, Ishtar Cabrera-Lozano, AnaB Calderón-Alvarado, FranciscoJ León-Frutos, ErickE Villanueva-Martínez, Aisha Abdullahi, Maimuna Abubakar, MohammedS Aliyu, Mudi Awaisu, Fadimatu Bakari, Abigail Olajumoke Balogun, Ahmad Bello, Kehinde Michael Duromola, Stephen G Gana, Mukoro Duke George, Justina Gimba, Isaac Gundu, Lambert Onahi Iji, Aminat O Jimoh, Afolabi K Koledade, Ahmad T Lawal, Bilkisu K Lawal, Stanley Emeka Nwabuoku, Oluseyi O Ogunsua, Ifeanyi Fidelis Okafor, Ethos Ike Okorie, Nasir Oyelowo, Ibrahim A Saidu, Tunde T Sholadoye, Ibrahim Sufyan, Musliu Adetola Tolani, Aliyu Muhammad Tukur, Ahmad Shehu Umar, Aminatu M Umar, Hajara Umaru-Sule, Mohammed Usman, Alfa Yakubu, Salisu Abeku Yusuf, Abdulhafiz A Abdulkarim, Lawal Barau Abdullahi, Khadija A Ado, Nura U Aliyu, Lofty-John Chukwuemeka Anyanwu, Sulaiman M Daneji, Mahmoud Kawu Magashi, Mohammad A Mohammad, Abubakar Bala Muhammad, Saminu S Muhammad, Bello Abodunde Muideen, Calistus U Nwachukwu, Suleiman B Sallau, Abdulrahman A Sheshe, Abdulmajeed Soladoye, Idris Usman Takai, Garzali I Umar, Abubakar Yahaya, Lubabatu Abdulrasheed, Joel A Adze, Lydia R Airede, Bashiru Aminu, Stephen B Bature, Firdaws Bello-Tukur, Damai Chinyio, SharonA N Duniya, Moses C Galadima, Babatunde K Hamza, Samaila Joshua, Stephen A Kache, Williams Y Kagomi, Ifeanyi A Kene, Jamila Lawal, Jerry G Makama, Caleb Mohammed, Amina A Mohammed-Durosinlorun, Deborah Nuwam, Abdulrasheed Sani, Salome Tabara, Mathew C Taingson, Emmanuel Usam, Josiah Yakubu, Folasade Adegoke, Oluwasuyi Ige, Tunde A Odunafolabi, Chukwuma E Okereke, Oluwafemi O Oladele, Oluwaseun H Olaleye, Oyetunde O Olubayo, Olukayode P Abiola, Henry O Abiyere, Idowu O Adebara, GbadeboT C Adeleye, Adebayo A Adeniyi, Olumide E Adewara, Olabisi T Adeyemo, Ademola A Adeyeye, Abimbola L Ariyibi, Babatunde S Awoyinka, Olumide M Ayankunle, Olakunle F Babalola, Adewumi Bakare, TajudeenI B Bakare, Oluseyi O Banjo, Peter A Egharevba, Oluwafemi S Fatudimu, John A Obateru, Oluremi J Odesanya, Owolabi D Ojo, Abiodun I Okunlola, Cecilia K Okunlola, Adewale T Olajide, Tesleem O Orewole, Adedayo I Salawu, Moruf A Abdulsalam, Aderinsola T Adelaja, Olalekan T Ajai, Noble Anyanwu, Kazeem M Atobatele, Oludayo Oluwaseyi Bakare, Omolara M Faboya, Francisca C Nwaenyi, Ayokunle A Ogunyemi, Mobolaji A Oludara, Olufunmilade A Omisanjo, Chinonso U Onyeka, Olabode A Oshodi, Yusuf A Oshodi, Omotade S Salami, Omolara M Williams, Esther Abunimye, Adebunmi Adeoluwa, Adedotun Adesiyakan, Victoria Ibukunoluwa Adeyeye, Moses Vincent Agbulu, David O Akinboyewa, Iyabo O Alasi, Michael Amao, Christiana Ashley-Osuzoka, Oluwole A Atoyebi, Olanrewaju S Balogun, Maryam Oluwatobi Busari, Nnamdi Jonathan Duru, Glory Bassey Edet, Olumide A Elebute, Francis Chinonso Ezenwankwo, Adedeji L Fatuga, Christianah Gbenga-Oke, Emmanuel Sylvester Inyang, Adesola I Jimoh, Jubril Oladayo Kuku, OluwaseunA Ladipo-Ajayi, Abdulrazzaq O Lawal, Christian Chigoze Makwe, Chinelo Victoria Mgbemena, Samuel U Nwokocha, Moses Adebisi Ogunjimi, Ephraim Okwudiri Ohazurike, Rufus W Ojewola, Moyosoluwa Eunice Badedale, Chike J Okeke, Adeyemi A Okunowo, Abraham T Oladimeji, Thomas O Olajide, Olabisi Olanrewaju, Olawunmi Olayioye, Oluwaseun O Oluseye, Stephen Olutola, Kenneth Onyekachi, Adeola Ayoola Orowale, Emili Osariemen, Adedapo Olumide Osinowo, Emmanuel Owie, Christianah Bidemi Oyegbola, Justina OSeyi-Olajide, AdaiahP Soibi-Harry, Manuella Talla Timo, Aloy Okechukwu Ugwu, Emmanuel Ojo Williams, Innocent O Duruewuru, Ochonma A Egwuonwu, Okechukwu Hyginus Ekwunife, James J Emeka, Chimdiebele Daisy Nwosu, Sylvester O Obiechina, Ahuizechukwu E Obiesie, Celestine I Okafor, Theophilus O Okonoboh, Odili A Okoye, Onyekachi A Onu, Chukwudubem C Onyejiaka, Chisom Faith Uche, JosephO Ugboajah, Akeem A Adeleke, Akinfolarin C Adepiti, Adewale A Aderounmu, Abdulhafiz O Adesunkanmi, Adewale O Adisa, Samuel C Ajekwu, Olusegun K Ajenifuja, Olusegun I Alatise, Tajudeen A Badmus, Tajudeen O Mohammed, Abdulkadir A Salako, Oludayo A Sowande, Ademola O Talabi, Funmilola O Wuraola, Paul Aderemi Adegoke, Abidemi Akinloye, Ayodeji Akinniyi, Joseph Ejimogu, Ideyonbe Samuel Eseile, Olakayode Olaolu Ogundoyin, Amos Okedare, Dare Isaac Olulana, Omolara Omotola, Francis Sanwo, Collins C Adumah, Adewale O Ajagbe, Olugbenga P Akintunde, Opeyemi Q Asafa, Kehinde Awodele, Amogu K Eziyi, Adeniyi O Fasanu, Olufemi O Ojewuyi, Abiodun R Ojewuyi, Abisola E Oyedele, Oluwaseun A Taiwo, Habiba I Abdullahi, Nathaniel D Adewole, Teddy E Agida, Eunice E Ailunia, Oseremen Aisuodionoe-Shadrach, Godwin O Akaba, Janet Alfred, Terkaa Atim, Kehinde G Bawa, John Y Chinda, Esther B Daluk, Sefiu B Eniola, Augusta O Ezenwa, Stephen E Garba, Philip M Mshelbwala, Ngozi O Ndukwe, Idoko P Ogolekwu, Alexander A Ohemu, Samuel A Sani, Salisu Suleiman, Helen Sunday, Nancy O Tabuanu, Aminu M Umar, Peter I Agbonrofo, Alexander I Arekhandia, Morrison E Edena, Raymond A Eghonghon, Joel E Enaholo, Genesis Ida, Stanley N Ideh, Oseihie I Iribhogbe, Omorodion O Irowa, Maradona E Isikhuemen, Oluwatomi R Odutola, Kester O Okoduwa, Scott O Omorogbe, David Oruade, Osasumwen T Osagie, Osarenkhoe Osemwegie, RukiyatA Abdus-Salam, Sikiru Adekola Adebayo, Oluwasanmi A Ajagbe, Gboyega Ajibola, Kelvin I Egbuchulem, Hyginus O Ekwuazi, Adegbolahan Fakoya, Oluwasegun C Idowu, David O Irabor, Taiwo A Lawal, Olakayode O Ogundoyin, Oluwabukade Ojediran, Naomi Olagunju, Akinsola T Sanusi, Augustine O Takure, Lukman Olajide Abdur-Rahman, Mary Oluwadamilola Adebisi, Nurudeen Abiola Adeleke, Rafiat Tinuola Afolabi, Isiaka Ishola Aremu, Jibril Oyekunle Bello, Robiat Bello, Saheed Abolade Lawal, Adeolu Ojajuni, Sabur Oyewale, Victor Abhulimen, Patrick O Igwe, Ikechukwu Enyinnaya Iweha, Raphael E John, Nnyonno Okoi, Philemon E Okoro, Vaduneme Kingsley Oriji, Ibiene T Oweredaba, Japhet Mizero, Immaculee Mutimamwiza, Francoise Nirere, Irenee Niyongombwa, Jean Paul Majyabere, Anastase Byaruhanga, Rongin Dukuzimana, Jean Aimable Habiyakare, Marie Gloriose Nabada, Marcel Uwizeye, Mathias Ruhosha, Joselyne Igiraneza, Faustine Ingabire, Aloys Karekezi, Jean pierre Masengesho, Lydia Mukamazera, Clemence Mukangabo, Jean Paul Niyomuremyi, Gabriel Ntwari, Celestin Seneza, Divine Umuhoza, Pierrine Nyirangeri, Jean Claude Uwimana, Isaie Sibomana, Desire Rubanguka, Josine Umuhoza, Roda Uwayezu, Leoncie Uzikwambara, Herbert Butana, Moise Dusabeyezu, Athanasie Mukasine, Jean N Utumatwishima, Mediatrice Batangana, Jeande Dieu Haragirimana, AllenJ C Ingabire, Espoir Mwungura, Dancilla Nyirasebura, Christian Jean Urimubabo, Anaclet Dusabimana, Sam Kanyesigye, Robert Munyaneza, Jean Yves Shyirakera, Aimee Domingo, Philip Munda, Chido Nyatsambo, Victor Ojo, Rudo Pswarayi, and Soeren Laurberg
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Medicine (General) ,R5-920 ,Infectious and parasitic diseases ,RC109-216 - Published
- 2024
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10. A Comparative Analysis of Board Qualities and Performance of Listed Deposit Money Banks in Nigeria and Ghana
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Oluyinka Oluwagbade, Niyi Solomon Awotomılusı, Samuel Ajibade Dada, Temitayo Oluwatimilehin Abe, and Motunrayo Olayinka Adewara
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Board Qualities, Good Governance, Risk Management, Deposit Banks ,Management. Industrial management ,HD28-70 ,Business ,HF5001-6182 - Abstract
Disclosure of board information is crucial for good governance, risk management, and stakeholder relations in the banking sector. The board of directors’ quality is crucial in setting strategic direction and ensuring effective governance. This study comparatively examined the qualities of the board of directors of listed deposit banks in Nigeria and Ghana and assessed the effects of the board qualities on the financial performance of banks in the two countries. The study used an ex post facto research design, involving 19 deposit money banks listed on the Nigerian Exchange Limited and Ghanaian Stock Exchange. Data was collected from audited annual reports and analyzed using descriptive and inferential statistics. The descriptive analysis includes mean, median mode, minimum, and maximum among others while the inferential analysis includes independent t-tests and panel regression. The study reveals that the board of listed deposit money banks in the Nigerian exchange group meets more frequently and is more independent than those in the Ghanaian stock exchange, and their board size is larger than in Ghana. Board female gender diversity of listed deposit money banks on the Nigerian exchange group is not significantly lower than the board female gender diversity of firms listed on the Ghanaian stock exchange. The study reveals that board gender diversity doesn’t significantly impact the financial performance of listed deposit money banks in Nigeria and Ghana. However, board independence has a negative effect in Nigeria, while board meetings negatively affect performance in Nigeria. Board size also has a positive effect in Nigeria. The study recommends that directors of listed banks in Nigeria should reduce the number of their meetings or expenses of the meeting because it is reducing the profitability of the companies. The study also recommends that the banks in Ghana should provide regular training for independent directors to enhance their understanding of the industry.
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- 2024
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11. Development of sustainable interlocking concrete paving blocks using bamboo leaf ash and metakaolin
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Ayobami Adebola Busari, Roland Tolulope Loto, Samuel Ajayi, Seun Daniel Oluwajana, and Ajiboye Eletu
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Bamboo leaf ash ,Geo-polymer ,Metakaolin ,Pavement interlocking blocks ,Waste ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Eco-friendly interlocking concrete pavement block was developed using the admixture of bamboo leaf ash and metakaolin. This was done to develop an eco-friendly interlocking paving block for sustainable pavement construction. Bamboo leaf ash and metakaolin were added as a supplementary cementitious material. The supplementary cementitious material (bamboo leaf ash and metakaolin) were admixed and added at 0, 5, 10, 15, 20, 25 and 30 % replacement of cement. The workability of the fresh concrete (slump) at the varied percentage additions, and the mechanical properties of the concrete at 7, 14, 28, and 56 days of curing were assessed, including their microstructural characteristics. The outcome of the research showed that increasing the percentage of (bamboo leaf ash + metakaolin) reduces the workability of the concrete. With a 20 % addition of this cementitious material, the developed fresh concrete became unworkable. In addition, replacing up to 10 % of the concrete in the pavement with bamboo leaf ash and metakaolin increased the mechanical strength of the concrete by 28.7 %. At 30 % a percentage increase of 3.6 % was recorded. However, the strength at 5 % was still adequate for pavement construction with a 13.62 % increase in mechanical strength. The compressive strength at 5 % and 10 % addition of the supplementary cementitious material at maturity met the criteria for constructing a semi-rigid pavement, using IRC standards. The microstructural assessment showed that the number of pores in the mature concrete samples decreased at 10 % addition of bamboo leaf ash and metakaolin. The research data provides construction workers, researchers, and highway engineers with vital information regarding the viability of these sustainable materials for pavement improvement.
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- 2024
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12. Additional file 8 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 8:Supplemental Tables 5-12. These tables list the complete model results for the four classes of variation for each genotype: (i) purely hormone-dependent transcription (ii) purely genotype-dependent transcription (iii) hormone and genotype-dependent transcription but with no interaction between these variables and (iv) hormone and genotype-dependent transcription, with co-dependence (interaction) between these variables. (PDF 110 KB)
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- 2020
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13. Additional file 3 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 3:Supplemental Figure 4. GKO and KKO hypothalamic transcription networks. The top three networks for both GKO and KKO hypothalamic transcription shown separately. (PDF 9 MB)
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- 2020
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14. Additional file 4 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 4:Supplemental Figure 3. KKO hypothalamic transcription networks merged. The top three networks of KKO hypothalamic transcription merged. (PDF 8 MB)
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- 2020
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15. Additional file 11 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 11:Supplemental Table 3. Genes carried forward into the T response QPCR analysis. Lists the 48 genes assessed by QPCR using the T response cohort of mice. (PDF 91 KB)
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- 2020
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16. Additional file of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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hormones, hormone substitutes, and hormone antagonists - Abstract
Additional file of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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- 2020
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17. Additional file 6 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 6:Supplemental Table 2. Genes carried forward for QPCR validation from initial array analysis. Lists the 95 genes assessed by QPCR that were chosen from the initial array analysis. (PDF 100 KB)
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- 2020
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18. Additional file 7 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 7:Supplemental Table 4. Characteristics of the hormonally treated mice. Lists the characteristics of the mice used in the T response cohort. (PDF 50 KB)
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- 2020
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19. Additional file 2 of The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, Tassigny, Xavier D'Anglemont De, McKinney, Steven, Algara, Teresa Ruiz De, Yap, Damian, Gulisa Turashvili, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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Additional file 2:Supplemental Figure 2. GKO hypothalamic transcription networks merged. The top three networks of GKO hypothalamic transcription merged. (PDF 7 MB)
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- 2020
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20. The testosterone-dependent and independent transcriptional networks in the hypothalamus of Gpr54 and Kiss1 knockout male mice are not fully equivalent
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Prentice, Leah M, d'Anglemont de Tassigny, Xavier, McKinney, Steven, Ruiz de Algara, Teresa, Yap, Damian, Turashvili, Gulisa, Poon, Steven, Sutcliffe, Margaret, Allard, Pat, Burleigh, Angela, Fee, John, Huntsman, David G, Colledge, William H, and Aparicio, Samuel AJ
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- 2011
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21. An Intelligent Search & Retrieval System (IRIS) and Clinical and Research Repository for Decision Support Based on Machine Learning and Joint Kernel-based Supervised Hashing
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David J Foran, Wenjin Chen, Tahsin Kurc, Rajarshi Gupta, Jakub Roman Kaczmarzyk, Luke Austin Torre-Healy, Erich Bremer, Samuel Ajjarapu, Nhan Do, Gerald Harris, Antoinette Stroup, Eric Durbin, and Joel H Saltz
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Large-scale, multi-site collaboration is becoming indispensable for a wide range of research and clinical activities in oncology. To facilitate the next generation of advances in cancer biology, precision oncology and the population sciences it will be necessary to develop and implement data management and analytic tools that empower investigators to reliably and objectively detect, characterize and chronicle the phenotypic and genomic changes that occur during the transformation from the benign to cancerous state and throughout the course of disease progression. To facilitate these efforts it is incumbent upon the informatics community to establish the workflows and architectures that automate the aggregation and organization of a growing range and number of clinical data types and modalities ranging from new molecular and laboratory tests to sophisticated diagnostic imaging studies. In an attempt to meet those challenges, leading health care centers across the country are making steep investments to establish enterprise-wide, data warehouses. A significant limitation of many data warehouses, however, is that they are designed to support only alphanumeric information. In contrast to those traditional designs, the system that we have developed supports automated collection and mining of multimodal data including genomics, digital pathology and radiology images. In this paper, our team describes the design, development and implementation of a multi-modal, Clinical & Research Data Warehouse (CRDW) that is tightly integrated with a suite of computational and machine-learning tools to provide actionable insight into the underlying characteristics of the tumor environment that would not be revealed using standard methods and tools. The System features a flexible Extract, Transform and Load (ETL) interface that enables it to adapt to aggregate data originating from different clinical and research sources depending on the specific EHR and other data sources utilized at a given deployment site.
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- 2024
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22. Global antimicrobial resistance and use surveillance system (GLASS 2022): Investigating the relationship between antimicrobial resistance and antimicrobial consumption data across the participating countries.
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Samuel Ajulo and Babafela Awosile
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Medicine ,Science - Abstract
For the first time since 2015, the World Health Organization's (WHO) global Antimicrobial Resistance and Use Surveillance (GLASS) featured both global reports for antimicrobial resistance (AMR) and antimicrobial consumption (AMC) data in its annual reports. In this study we investigated the relationship of AMR with AMC within participating countries reported in the GLASS 2022 report. Our analysis found a statistically significant correlation between beta-lactam/cephalosporin and fluoroquinolones consumption and AMR to these antimicrobials associated with bloodstream E. coli and Klebsiella pneumoniae among the participating countries (P
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- 2024
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23. Task shifting roles, interventions and outcomes for kidney and cardiovascular health service delivery among African populations: a scoping review
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Ikechi G. Okpechi, Ijezie I. Chukwuonye, Udeme Ekrikpo, Jean Jacques Noubiap, Yemi R. Raji, Yusuf Adeshina, Samuel Ajayi, Zunaid Barday, Malini Chetty, Bianca Davidson, Emmanuel Effa, Stephen Fagbemi, Cindy George, Andre P. Kengne, Erika S. W. Jones, Hamidu Liman, Mohammad Makusidi, Hadiza Muhammad, Ikechukwu Mbah, Kwazi Ndlovu, Grace Ngaruiya, Chimezie Okwuonu, Ugochi Samuel-Okpechi, Elliot K. Tannor, Ifeoma Ulasi, Zulkifilu Umar, Nicola Wearne, and Aminu K. Bello
- Subjects
Africa ,Cardiovascular disease ,Chronic kidney disease ,Diabetes ,Hypertension ,Health workforce ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Human resources for health (HRH) shortages are a major limitation to equitable access to healthcare. African countries have the most severe shortage of HRH in the world despite rising communicable and non-communicable disease (NCD) burden. Task shifting provides an opportunity to fill the gaps in HRH shortage in Africa. The aim of this scoping review is to evaluate task shifting roles, interventions and outcomes for addressing kidney and cardiovascular (CV) health problems in African populations. Methods We conducted this scoping review to answer the question: “what are the roles, interventions and outcomes of task shifting strategies for CV and kidney health in Africa?” Eligible studies were selected after searching MEDLINE (Ovid), Embase (Ovid), CINAHL, ISI Web of Science, and Africa journal online (AJOL). We analyzed the data descriptively. Results Thirty-three studies, conducted in 10 African countries (South Africa, Nigeria, Ghana, Kenya, Cameroon, Democratic Republic of Congo, Ethiopia, Malawi, Rwanda, and Uganda) were eligible for inclusion. There were few randomized controlled trials (n = 6; 18.2%), and tasks were mostly shifted for hypertension (n = 27; 81.8%) than for diabetes (n = 16; 48.5%). More tasks were shifted to nurses (n = 19; 57.6%) than pharmacists (n = 6; 18.2%) or community health workers (n = 5; 15.2%). Across all studies, the most common role played by HRH in task shifting was for treatment and adherence (n = 28; 84.9%) followed by screening and detection (n = 24; 72.7%), education and counselling (n = 24; 72.7%), and triage (n = 13; 39.4%). Improved blood pressure levels were reported in 78.6%, 66.7%, and 80.0% for hypertension-related task shifting roles to nurses, pharmacists, and CHWs, respectively. Improved glycaemic indices were reported as 66.7%, 50.0%, and 66.7% for diabetes-related task shifting roles to nurses, pharmacists, and CHWs, respectively. Conclusion Despite the numerus HRH challenges that are present in Africa for CV and kidney health, this study suggests that task shifting initiatives can improve process of care measures (access and efficiency) as well as identification, awareness and treatment of CV and kidney disease in the region. The impact of task shifting on long-term outcomes of kidney and CV diseases and the sustainability of NCD programs based on task shifting remains to be determined.
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- 2023
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24. Predictive Modeling of Phenotypic Antimicrobial Susceptibility of Selected Beta-Lactam Antimicrobials from Beta-Lactamase Resistance Genes
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Md. Kaisar Rahman, Ryan B. Williams, Samuel Ajulo, Gizem Levent, Guy H. Loneragan, and Babafela Awosile
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predictive modeling ,beta-lactamase gene ,MIC ,Enterobacteriaceae ,Therapeutics. Pharmacology ,RM1-950 - Abstract
The outcome of bacterial infection management relies on prompt diagnosis and effective treatment, but conventional antimicrobial susceptibility testing can be slow and labor-intensive. Therefore, this study aims to predict phenotypic antimicrobial susceptibility of selected beta-lactam antimicrobials in the bacteria of the family Enterobacteriaceae from different beta-lactamase resistance genotypes. Using human datasets extracted from the Antimicrobial Testing Leadership and Surveillance (ATLAS) program conducted by Pfizer and retail meat datasets from the National Antimicrobial Resistance Monitoring System for Enteric Bacteria (NARMS), we used a robust or weighted least square multivariable linear regression modeling framework to explore the relationship between antimicrobial susceptibility data of beta-lactam antimicrobials and different types of beta-lactamase resistance genes. In humans, in the presence of the blaCTX-M-1, blaCTX-M-2, blaCTX-M-8/25, and blaCTX-M-9 groups, MICs of cephalosporins significantly increased by values between 0.34–3.07 μg/mL, however, the MICs of carbapenem significantly decreased by values between 0.81–0.87 μg/mL. In the presence of carbapenemase genes (blaKPC, blaNDM, blaIMP, and blaVIM), the MICs of cephalosporin antimicrobials significantly increased by values between 1.06–5.77 μg/mL, while the MICs of carbapenem antimicrobials significantly increased by values between 5.39–67.38 μg/mL. In retail meat, MIC of ceftriaxone increased significantly in the presence of blaCMY-2, blaCTX-M-1, blaCTX-M-55, blaCTX-M-65, and blaSHV-2 by 55.16 μg/mL, 222.70 μg/mL, 250.81 μg/mL, 204.89 μg/mL, and 31.51 μg/mL respectively. MIC of cefoxitin increased significantly in the presence of blaCTX-M-65 and blaTEM-1 by 1.57 μg/mL and 1.04 μg/mL respectively. In the presence of blaCMY-2, MIC of cefoxitin increased by an average of 8.66 μg/mL over 17 years. Compared to E. coli isolates, MIC of cefoxitin in Salmonella enterica isolates decreased significantly by 0.67 μg/mL. On the other hand, MIC of ceftiofur increased in the presence of blaCTX-M-1, blaCTX-M-65, blaSHV-2, and blaTEM-1 by 8.82 μg/mL, 9.11 μg/mL, 8.18 μg/mL, and 1.04 μg/mL respectively. In the presence of blaCMY-2, MIC of ceftiofur increased by an average of 10.20 μg/mL over 14 years. The ability to predict antimicrobial susceptibility of beta-lactam antimicrobials directly from beta-lactamase resistance genes may help reduce the reliance on routine phenotypic testing with higher turnaround times in diagnostic, therapeutic, and surveillance of antimicrobial-resistant bacteria of the family Enterobacteriaceae.
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- 2024
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25. Dataset on modelling a synthetic oil rim reservoirs for optimizing oil production during gas cap blow down strategy
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Oluwasanmi Olabode, ChukwuEbuka Nnorom, Samuel Ajagunna, Kehinde Awelewa, Precious Umunna, and Odera Uzodinma
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Oil rim reservoirs ,Gas cap blow down ,Reservoir modelling ,Computer applications to medicine. Medical informatics ,R858-859.7 ,Science (General) ,Q1-390 - Abstract
Oil rim reservoirs with very large gas caps, strong aquifers, and pay thickness below 30 ft. pose oil production challenges to operators. With best operational practices, very high gas oil ratios are recorded at the initial onset of oil production, thus such reservoirs are subjected to a gas cap blow down leading to an ultimate loss in oil reserves. This loss is attributed to a rapid and drastic drop in pressure over the productive life of the reservoir. To maximize oil production, a simulation study is focused on initiating oil wells at different time intervals and estimating oil recoveries at these points. It is believed that the gas cap would have been blown down in time to accommodate for substantial oil production. This study presents the reservoir data (from the Niger-Delta) that can be incorporated in a black oil reservoir simulator (Eclipse) coupled with best production and optimization strategies (water and gas injection) for maximum oil production during gas cap blow down. The data presented will provide a detailed process developing an oil rim synthetic model, support and enhance further studies in optimizing oil production in oil rims subjected to gas cap blow down, create a template for secondary and enhanced oil recovery processes.
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- 2022
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26. Coloniality, Legitimacy in Statebuilding, and the Use of Force in Africa
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Samuel Ajogwu Igba and Emmaculate Asige Liaga
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coloniality ,statebuilding ,force ,africa ,ethnicity ,kenya ,south sudan ,nigeria ,somalia ,Social Sciences - Abstract
In Africa, legitimation and claims to the legitimate use of force are often challenged by the problematic nature of ethnic diversity, amongst other things. Although ethnicity and diversity are not the problems in themselves, the politicisation of ethnicity is. In this paper, we link this to a history of colonisation which clustered multiple ethnic groups together within single sovereign entities around the continent, as well as the current realities of coloniality which has prevented states within the continent from imagining and transcending the European artefact and design of the modern state in Africa. We link the exploratory term coloniality in statebuilding to the failure of African states to overcome the politicisation of ethnicity and ethnic diversity in order to mitigate the problematic nature of democracy in modern African states. This failure leads to challenges of legitimacy in any given state, and ultimately the states’ claim to the legitimate use of force. The resultant symptoms and indicators of such challenges are manifest in the rise of various insurgencies, separatism, and other forms of insecurity. The cases of Kenya, South Sudan, Nigeria, and Somalia are briefly discussed in this article, highlighting the problematic nature of the claims to the legitimate use of force, legitimacy, and the resultant political ethnicity with all its consequences for these states.
- Published
- 2021
27. The CircumVent Project: a CPAP/O2 helmet solution for non-invasive ventilation using an implementation research framework
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Aimalohi A. Ahonkhai, Adesola Z. Musa, André A. Fenton, Muktar H. Aliyu, Igho Ofotokun, Alex Hornstein, Baba M. Musa, Nnamdi Nwosu, Ifeoma Ulasi, Samuel Ajayi, Catherine Falade, Adedamola Dada, Aliyu Abdu, Mogaji Sunday, Adenike Odewabi, Muyiwa K. Rotimi, Onome Ogueh, Alan Steinbach, Gbenga Ogedegbe, Babatunde L. Salako, and Oliver C. Ezechi
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SARS-CoV-2, COVID-19 infection ,Nigeria ,Non-invasive ventilation ,Implementation science ,Medicine (General) ,R5-920 - Abstract
Abstract Background Acute respiratory failure, a major cause of death in COVID-19, is managed with high-flow oxygen therapy via invasive mechanical ventilation. In resource-limited settings like Nigeria, the shortage of ventilators and oxygen supply makes this option challenging. Evidence-based non-invasive alternatives to mechanical ventilation such as the use of continuous positive airway pressure (CPAP) devices exist, but there have been concerns that non-invasive ventilation may expose healthcare workers to infection from aerosolized dispersion of SARS-CoV-2. We propose to evaluate the feasibility, adaptability and acceptability of a CPAP/O2 helmet solution for non-invasive ventilation among patients with COVID-19 and health workers in eight COVID-19 treatment and isolation centers in Nigeria. Methods The study will occur in 4 stages: (1) convene a Steering Committee of key stakeholders and recruit implementation sites; (2) use the integrated Promoting Action on Research Implementation in Health Services (i-PARiHS) framework to guide a needs assessment of treatment centers’ capacity to use high-flow oxygen therapy to treat COVID-19 patients and utilize the findings to develop an implementation strategy for the use of a CPAP/O2 helmet solution; (3) build infrastructure to support training and data monitoring processes and to develop implementation protocols to evaluate the adaptability of the strategy for the use of the CPAP/O2 helmet; and (4) train health workers, distribute a CPAP/O2 helmet solution for non-invasive ventilation, pilot test the implementation strategy, and assess feasibility of its use and acceptability that includes monitoring altered risk of SARS-CoV-2 infection among healthcare workers. Discussion The CPAP/O2 helmet solution for non-invasive ventilation in Nigeria can serve as a scalable model for resource-poor countries, and beyond the COVID-19 pandemic, has the potential to be deployed for the treatment of pneumonia and other respiratory diseases. Trial registration NCT04929691. Registered June 18, 2021—retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT04929691
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- 2021
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28. Achieving close range photogrammetry with non-metric mobile phone cameras
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Joseph Olayemi Odumosu, Oluibukun Gbenga Ajayi, Victor Chukwuemeka Nnam, and Samuel Ajayi
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collinearity equation ,space resection ,space intersection ,3d object space coordinate ,non-metric cameras ,Geodesy ,QB275-343 - Abstract
Close range photogrammetry (CRP) has gained increasing relevance over the years with its principles and theories being applied in diverse applications. Further supporting this trend, the current increase in the wide spread usage of mobile phones with high resolution cameras is expected to further popularize positioning by CRP. This paper presents the results of an experimental study wherein two (2) non-metric mobile phone cameras have been used to determine the 3-D coordinates of points on a building by using the collinearity condition equation in an iterative least square bundle adjustment process in MATLAB software environment. The two (2) mobile phones used were Tecno W3 and Infinix X509 phones with focal lengths of 5.432 mm and 8.391 mm respectively. Statistical tests on the results obtained shows that there is no significant difference between the 3-D coordinates obtained by ground survey and those obtained from both cameras at 99% confidence level. Furthermore, the study confirmed the capability of non-metric mobile phone cameras to determine 3D point positions to centimeter level accuracy (with maximum residuals of 11.8 cm, 31.0 cm, and 5.9 cm for the Tecno W3 camera and 14.6 cm, 16.1 cm and 1.8 cm for the Infinix X509 camera in the Eastings, Northings and Heights respectively).
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- 2021
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29. Genomic Characterization of Fecal Escherichia coli Isolates with Reduced Susceptibility to Beta-Lactam Antimicrobials from Wild Hogs and Coyotes
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Babafela Awosile, Jason Fritzler, Gizem Levent, Md. Kaisar Rahman, Samuel Ajulo, Ian Daniel, Yamima Tasnim, and Sumon Sarkar
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beta-lactam antimicrobial ,E. coli ,wild hog ,coyote ,Medicine - Abstract
This study was carried out to determine the antimicrobial resistance (AMR) genes and mobile genetic elements of 16 Escherichia coli isolates—with reduced susceptibility to ceftazidime and imipenem—that were recovered from the fecal samples of coyotes and wild hogs from West Texas, USA. Whole-genome sequencing data analyses revealed distinct isolates with a unique sequence type and serotype designation. Among 16 isolates, 4 isolates were multidrug resistant, and 5 isolates harbored at least 1 beta-lactamase gene (blaCMY-2, blaCTX-M-55, or blaCTX-M-27) that confers resistance to beta-lactam antimicrobials. Several isolates carried genes conferring resistance to tetracyclines (tet(A), tet(B), and tet(C)), aminoglycosides (aac(3)-IId, ant(3″)-Ia, aph(3′)-Ia, aph(3″)-lb, aadA5, and aph(6)-ld), sulfonamides (sul1, sul2, and sul3), amphenicol (floR), trimethoprim (dfrA1 and dfrA17), and macrolide, lincosamide, and streptogramin B (MLSB) agents (Inu(F), erm(B), and mph(A)). Nine isolates showed chromosomal mutations in the promoter region G of ampC beta-lactamase gene, while three isolates showed mutations in gyrA, parC, and parE quinolone resistance-determining regions, which confer resistance to quinolones. We also detected seven incompatibility plasmid groups, with incF being the most common. Different types of virulence genes were detected, including those that enhance bacterial fitness and pathogenicity. One blaCMY-2 positive isolate (O8:H28) from a wild hog was also a Shiga toxin-producing E. coli and was a carrier of the stx2A virulence toxin subtype. We report the detection of blaCMY-2, blaCTX-M-55, and blaCTX-M-27 beta-lactamase genes in E. coli from coyotes for the first time. This study demonstrates the importance of wildlife as reservoirs of important multi-drug-resistant bacteria and provides information for future comparative genomic analysis with the limited literature on antimicrobial resistance dynamics in wildlife such as coyotes.
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- 2023
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30. TARGETED, LCMS-BASED METABOLOMICS FOR QUANTITATIVE MEASUREMENT OF NAD + METABOLITES
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Trammell, Samuel AJ, primary and Brenner, Charles, additional
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- 2013
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31. Trends in the epidemiology of childhood nephrotic syndrome in Africa: A systematic review
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Rachel Wine, Jovanka Vasilevska-Ristovska, Tonny Banh, Janae Knott, Damien Noone, Rasheed Gbadegesin, Titilayo O. Ilori, Henrietta U. Okafor, Francis Furia, Ifeoma Ulasi, Adaobi U. Solarin, Christopher Esezobor, Anthony Batte, Yemi Raji, Timothy O. Olanrewaju, Uzoamaka Muoneke, Adewale E. Adetunji, Vincent Boima, Oluwatoyin Amira, Charlotte Osafo, Georgette Guemkam, Samuel Ajayi, Muhammad A. Makusidi, Emmanuel A. Anigilaje, Paschal Ruggajo, Adanze O. Asinobi, Adebowale D. Ademola, and Rulan S. Parekh
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Infectious and parasitic diseases ,RC109-216 - Abstract
Summary: Background: Childhood nephrotic syndrome, if left untreated, leads to progressive kidney disease or death. We quantified the prevalence of steroid-sensitive nephrotic syndrome, steroid-resistant nephrotic syndrome, and histological types as the epidemiology of nephrotic syndrome in Africa remains unknown, yet impacts outcomes. Methods: We searched MEDLINE, Embase, African Journals Online, and WHO Global Health Library for articles in any language reporting on childhood nephrotic syndrome in Africa from January 1, 1946 to July 1, 2020. Primary outcomes included steroid response, biopsy defined minimal change disease, and focal segmental glomerulosclerosis (FSGS) by both pooled and individual proportions across regions and overall. Findings: There were 81 papers from 17 countries included. Majority of 8131 children were steroid-sensitive (64% [95% CI: 63–66%]) and the remaining were steroid-resistant (34% [95% CI: 33–35%]). Of children biopsied, pathological findings were 38% [95% CI: 36–40%] minimal change, 24% [95% CI: 22–25%] FSGS, and 38% [95% CI: 36–40%] secondary causes of nephrotic syndrome. Interpretation: Few African countries reported on the prevalence of childhood nephrotic syndrome. Steroid-sensitive disease is more common than steroid-resistant disease although prevalence of steroid-resistant nephrotic syndrome is higher than reported globally. Pathology findings suggest minimal change and secondary causes are common. Scarcity of data in Africa prevents appropriate healthcare resource allocation to diagnose and treat this treatable childhood kidney disease to prevent poor health outcomes. Funding: Funding was provided by the Canadian Institute for Health Research (CIHR) and the National Institute of Health (NIH) for the H3 Africa Kidney Disease Research Network. This research was undertaken, in part, from the Canada Research Chairs program.
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- 2021
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32. Targeted Mass Spectrometry Enables Multiplexed Quantification of Immunomodulatory Proteins in Clinical Biospecimens
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Jeffrey R. Whiteaker, Rachel A. Lundeen, Lei Zhao, Regine M. Schoenherr, Aura Burian, Dongqing Huang, Ulianna Voytovich, Tao Wang, Jacob J. Kennedy, Richard G. Ivey, Chenwei Lin, Oscar D. Murillo, Travis D. Lorentzen, Mathangi Thiagarajan, Simona Colantonio, Tessa W. Caceres, Rhonda R. Roberts, Joseph G. Knotts, Joshua J. Reading, Jan A. Kaczmarczyk, Christopher W. Richardson, Sandra S. Garcia-Buntley, William Bocik, Stephen M. Hewitt, Karen E. Murray, Nhan Do, Mary Brophy, Stephen W. Wilz, Hongbo Yu, Samuel Ajjarapu, Emily Boja, Tara Hiltke, Henry Rodriguez, and Amanda G. Paulovich
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immunotherapy ,cancer ,correlative biomarkers ,mass spectrometry ,immuno-MRM ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Immunotherapies are revolutionizing cancer care, producing durable responses and potentially cures in a subset of patients. However, response rates are low for most tumors, grade 3/4 toxicities are not uncommon, and our current understanding of tumor immunobiology is incomplete. While hundreds of immunomodulatory proteins in the tumor microenvironment shape the anti-tumor response, few of them can be reliably quantified. To address this need, we developed a multiplex panel of targeted proteomic assays targeting 52 peptides representing 46 proteins using peptide immunoaffinity enrichment coupled to multiple reaction monitoring-mass spectrometry. We validated the assays in tissue and plasma matrices, where performance figures of merit showed over 3 orders of dynamic range and median inter-day CVs of 5.2% (tissue) and 21% (plasma). A feasibility study in clinical biospecimens showed detection of 48/52 peptides in frozen tissue and 38/52 peptides in plasma. The assays are publicly available as a resource for the research community.
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- 2021
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33. HIV Viremia Is Associated With APOL1 Variants and Reduced JC-Viruria
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Etty Kruzel-Davila, Barbara Mensah Sankofi, Ernestine Kubi Amos-Abanyie, Anita Ghansah, Alexander Nyarko, Seth Agyemang, Gordon A. Awandare, Moran Szwarcwort-Cohen, Anat Reiner-Benaim, Basem Hijazi, Ifeoma Ulasi, Yemi Raheem Raji, Vincent Boima, Charlotte Osafo, Victoria May Adabayeri, Michael Matekole, Timothy O. Olanrewaju, Samuel Ajayi, Manmak Mamven, Sampson Antwi, Adebowale D. Ademola, Jacob Plange-Rhule, Fatiu Arogundade, Priscilla Abena Akyaw, Cheryl A. Winkler, Babatunde L. Salako, Akinlolu Ojo, Karl Skorecki, and Dwomoa Adu
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APOL1 ,HIV viremia ,JC viruria ,BK viruria ,innate immune ,kidney disease ,Medicine (General) ,R5-920 - Abstract
Variants in the Apolipoprotein L1 (APOL1) gene (G1-rs60910145, rs73885319, G2-rs71785313) are common in Africans and in individuals of recent African ancestry and are associated with an increased risk of non-diabetic chronic kidney disease (CKD) and in particular of HIV associated nephropathy (HIVAN). In light of the significantly increased risk of HIVAN in carriers of two APOL1 risk alleles, a role in HIV infectivity has been postulated in the mechanism of APOL1 associated kidney disease. Herein, we aim to explore the association between HIV viremia and APOL1 genotype. In addition, we investigated interaction between BK and JC viruria, CKD and HIV viremia. A total of 199 persons living with HIV/AIDS (comprising 82 CKD cases and 117 controls) from among the participants in the ongoing Human Heredity and Health in Africa (H3Africa) Kidney Disease Research Network case control study have been recruited. The two APOL1 renal risk alleles (RRA) genotypes were associated with a higher risk of CKD (OR 12.6, 95% CI 3.89–40.8, p < 0.0001). Even a single APOL1 RRA was associated with CKD risk (OR 4.42, 95% CI 1.49–13.15, p = 0.007). The 2 APOL1 RRA genotypes were associated with an increased probability of having HIV viremia (OR 2.37 95% CI 1.0–5.63, p = 0.05). HIV viremia was associated with increased CKD risk (OR 7.45, 95% CI 1.66–33.35, P = 0.009) and with a significant reduction of JC virus urine shedding (OR 0.35, 95% CI 0.12–0.98, p = 0.046). In contrast to prior studies, JC viruria was not associated with CKD but was restricted in patients with HIV viremia, regardless of CKD status. These findings suggest a role of APOL1 variants in HIV infectivity and emphasize that JC viruria can serve as biomarker for innate immune system activation.
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- 2021
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34. Kisspeptin and GPR54 immunoreactivity in a cohort of 518 patients defines favourable prognosis and clear cell subtype in ovarian carcinoma
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Prentice, Leah M, primary, Klausen, Christian, additional, Kalloger, Steve, additional, Köbel, Martin, additional, McKinney, Steven, additional, Santos, Jennifer L, additional, Kenney, Challayne, additional, Mehl, Erika, additional, Gilks, C Blake, additional, Leung, Peter, additional, Swenerton, Ken, additional, Huntsman, David G, additional, and Aparicio, Samuel AJ, additional
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- 2007
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35. Challenges and possible solutions to peritoneal dialysis use in Nigeria
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Samuel Ajayi, Yemi Raji, Temitope Bello, and Ayodeji Arije
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peritoneal dialysis ,challenges ,solutions ,nigeria ,Medicine - Abstract
INTRODUCTION: Peritoneal dialysis is a form of renal replacement therapy that is both effective and relatively affordable. Peritoneal dialysis (PD) was first used in Nigeria as a treatment option for renal failure. Its use was first reported in Nigeria in 1969 and became more widespread in the 80s and 90s. Haemodialysis, which is capital intensive to set up and requires infrastructures and facilities such as electricity, intense water consumption and buildings, seems to have upstaged peritoneal dialysis both in demand and supply.
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- 2020
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36. H3Africa partnerships to empower clinical research sites to generate high-quality biological samples
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Talishiea Croxton, Ndidi Agala, Emmanuel Jonathan, Olasinbo Balogun, Petronilla J. Ozumba, Enzenwa Onyemata, Shefiya Lawal, Manmak Mamven, Samuel Ajayi, Sylvia E. Melikam, Mayowa Owolabi, Bruce Ovbiagele, Dwomoa Adu, Akinlolu Ojo, Christine Beiswanger, and Alash'le Abimiku
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biobank ,training ,africa ,developing country ,biotechnology ,Public aspects of medicine ,RA1-1270 ,Medicine (General) ,R5-920 - Abstract
Background: The Institute of Human Virology Nigeria (IHVN) – Human Heredity and Health in Africa (H3Africa) Biorepository (I-HAB) seeks to provide high-quality biospecimens for research. This depends on the ability of clinical research sites (CRS) – who provide biospecimens – to operate according to well-established industry standards. Yet, standards are often neglected at CRSs located in Africa. Here, I-HAB reports on its four-pronged approach to empower CRSs to prepare high-quality biospecimens for research. Objectives: I-HAB sought (1) to assess a four-pronged approach to improve biobanking practices and sample quality among CRSs, and (2) to build human capacity. Methods: I-HAB partnered with two H3Africa principal investigators located in Nigeria and Ghana from August 2013 through to May 2017 to debut its four-pronged approach (needs assessment, training and mentorship, pilot, and continuous quality improvement) to empower CRSs to attain high-quality biospecimens. Results: Close collaborations were instrumental in establishing mutually beneficial and lasting relationships. Improvements during the 12 months of engagement with CRSs involved personnel, procedural, and supply upgrades. In total, 51 staff were trained in over 20 topics. During the pilot, CRSs extracted 50 DNA biospecimens from whole blood and performed quality control. The CRSs shipped extracted DNA to I-HAB and I-HAB that comparatively analysed the DNA. Remediation was achieved via recommendations, training, and mentorship. Preanalytical, analytical and post-analytical processes, standard operating procedures, and workflows were systematically developed. Conclusion: Partnerships between I-HAB and H3Africa CRSs enabled research sites to produce high-quality biospecimens through needs assessment, training and mentorship, pilot, and continuous monitoring and improvement.
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- 2020
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37. Increased urinary sodium excretion is associated with systolic blood pressure in first degree relatives of hypertensive patients in Ibadan, Southwestern Nigeria
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Samuel Ajayi, Adewole Adebiyi, and Solomon Kadiri
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hypertension ,first degree relatives ,urinars sodium excretion ,Medicine - Abstract
INTRODUCTION: Understanding the risk factors of hypertension has led to a better understanding of the pathogenesis, prevention and reduction in morbidity of hypertension. It is well known that offsprings of hypertensive parents have an increased risk of developing hypertension. It is therefore necessary to explore the physiological differences between normotensive patients with and without a positive family history of hypertension with respect to their urinary excretion of sodium. METHODS: This study was carried out at the University College Hospital, Ibadan Nigeria, to determine if normotensive patients with a positive family history of hypertension are different with respect to their urinary excretion of electrolytes and blood pressure. It examined the relationship between 24-hour urinary excretion of sodium, chloride and potassium, urea and creatinine and blood pressure in subjects with and without family history of hypertension. It was a case-control study of sixty-two subjects: normotensive patients first degree relatives of primary hypertensive patients and normotensive patients without positive family history. RESULTS: the mean (SD) systolic blood pressures for subjects with and without family history of hypertension were significantly different: 120.0(22.25) and 105.0(17.50) respectively, (p = 0.001). The mean arterial blood pressures were significantly different: 86.4(10.2) mmHg and 80.1(8.1) mmHg respectively (p=0.010). The mean (SD) 24-hour urinary excretion of sodium for normotensive patients with and without positive family history of hypertension were 180.5 (45.50) mEq/L, and 156.0(36.25) mEq/L respectively. Systolic blood pressure and 24-hour urinary excretion of sodium was also higher in normotensive subjects with a positive family history of hypertension. CONCLUSION: Systolic blood pressure and twenty-four hour urinary excretion of sodium were higher in normotensive subjects with a positive family history of hypertension than in those without a family history of hypertension.
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- 2018
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38. Long-Term Outcome of Second-Line Antiretroviral Therapy in Resource-Limited Settings
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Olukemi Osinusi-Adekanmbi MD, MPH, Kristen Stafford MPH, Adiba Ukpaka MBBS, Donald Salami MSc, Samuel Ajayi MBBS, Nicaise Ndembi PhD, Alash’le Abimiku PhD, Chidi Nwizu MD, Bruce Gilliam MD, Robert Redfield MD, and Anthony Amoroso MD
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Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
There is limited information on efficacy and durability of second-line antiretroviral therapy (2NL) beyond 12 months in resource-limited settings. A total of 73 patients were enrolled into a prospective 2NL observational cohort in Nigeria. Second-line antiretroviral therapy consisted of lopinavir/ritonavir plus nucleoside reverse transcriptase inhibitors. Time on 2NL ranged from 15 to 31 months. Genotypes were retrospectively done and not available to guide second-line regimen choice. At enrollment, median CD4 count was 121 cells/mm 3 , and median time on first-line antiretroviral therapy (1SL) was 24 months. At 6 to 9 months on 2NL, 72.6% (intention to treat [ITT]) and 88.3% (on treatment [OT]) had an undetectable viral load (UDVL). At 12 months, 65.8% (ITT) and 90.57% (OT) had UDVL. At >12 to 24 months and at >24 months, 57.5% (ITT) and 91.3% (OT) had UDVL. No statistically significant association was observed between CD4 at 2NL start, sex, genotypic sensitivity score of 2NL, or tenofovir (TDF) use in 1SL and viral suppression. Two patients developed major protease inhibitor mutations while on 2NL. We observed a high degree of viral suppression at 12 months and little loss of viral suppression thereafter.
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- 2014
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39. Characteristics of HIV-2 and HIV-1/HIV-2 Dually Seropositive Adults in West Africa Presenting for Care and Antiretroviral Therapy: The IeDEA-West Africa HIV-2 Cohort Study.
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Didier K Ekouevi, Eric Balestre, Patrick A Coffie, Daouda Minta, Eugene Messou, Adrien Sawadogo, Albert Minga, Papa Salif Sow, Emmanuel Bissagnene, Serge P Eholie, Geoffrey S Gottlieb, François Dabis, IeDEA West Africa collaboration, Djimon Marcel Zannou, Carin Ahouada, Jocelyn Akakpo, Christelle Ahomadegbé, Jules Bashi, Alice Gougounon-Houéto, Angèle Azon-Kouanou, Fabien Houngbé, Sikiratou Koumakpaï, Florence Alihonou, Marcelline d'Almeida, Irvine Hodonou, Ghislaine Hounhoui, Gracien Sagbo, Leïla Tossa-Bagnan, Herman Adjide, Joseph Drabo, René Bognounou, Arnaud Dienderé, Eliezer Traore, Lassane Zoungrana, Béatrice Zerbo, Adrien Bruno Sawadogo, Jacques Zoungrana, Arsène Héma, Ibrahim Soré, Guillaume Bado, Achille Tapsoba, Diarra Yé, Fla Kouéta, Sylvie Ouedraogo, Rasmata Ouédraogo, William Hiembo, Mady Gansonré, Eugène Messou, Joachim Charles Gnokoro, Mamadou Koné, Guillaume Martial Kouakou, Clarisse Amani Bosse, Kouakou Brou, Achi Isidore Assi, Henri Chenal, Denise Hawerlander, Franck Soppi, Yao Abo, Germain Bomisso, Serge Paul Eholié, Mensah Deborah Noelly Amego, Viviane Andavi, Zelica Diallo, Frédéric Ello, Aristophane Koffi Tanon, Serge Olivier Koule, Koffi Charles Anzan, Calixte Guehi, Edmond Addi Aka, Koffi Ladji Issouf, Jean-Claude Kouakou, Marie-Sylvie N'gbeche, Pety Touré, Divine Avit-Edi, Kouadio Kouakou, Magloire Moh, Valérie Andoblé Yao, Madeleine Amorissani Folquet, Marie-Evelyne Dainguy, Cyrille Kouakou, Véronique Tanoh Méa-Assande, Gladys Oka-Berete, Nathalie Zobo, Patrick Acquah, Marie-Berthe Kokora, Tanoh François Eboua, Marguerite Timité-Konan, Lucrèce Diecket Ahoussou, Julie Kebé Assouan, Mabéa Flora Sami, Clémence Kouadio, Lorna Renner, Bamenla Goka, Jennifer Welbeck, Adziri Sackey, Seth Ntiri Owiafe, Christian Wejse, Zacarias José Da Silva, Joao Paulo, Amabelia Rodrigues, David da Silva, Candida Medina, Ines Oliviera-Souto, Lars Ostergaard, Alex Laursen, Morten Sodemann, Peter Aaby, Anders Fomsgaard, Christian Erikstrup, Jesper Eugen-Olsen, Moussa Y Maïga, Fatoumata Fofana Diakité, Abdoulaye Kalle, Drissa Katile, Hamar Alassane Traore, Tidiani Cissé, Mamadou Dembelé, Mohammed Doumbia, Mahamadou Fomba, Assétou Soukho Kaya, Abdoulaye M Traoré, Hamady Traoré, Amadou Abathina Toure, Fatoumata Dicko, Mariam Sylla, Alima Berthé, Hadizatou Coulibaly Traoré, Anta Koïta, Niaboula Koné, Clémentine N'diaye, Safiatou Touré Coulibaly, Mamadou Traoré, Naïchata Traoré, Man Charurat, Samuel Ajayi, Stephen Dapiap, Otu, Festus Igbinoba, Okwara Benson, Clément Adebamowo, Jesse James, Obaseki, Philip Osakede, John Olasode, Bernard Diop, Noël Magloire Manga, Judicael Malick Tine, Haby Signate Sy, Abou Ba, Aida Diagne, Hélène Dior, Malick Faye, Ramatoulaye Diagne Gueye, Aminata Diack Mbaye, Akessiwe Patassi, Awèrou Kotosso, Benjamin Goilibe Kariyare, Gafarou Gbadamassi, Agbo Komi, Kankoé Edem Mensah-Zukong, Pinuwe Pakpame, Annette Koko Lawson-Evi, Yawo Atakouma, Elom Takassi, Améyo Djeha, Ayoko Ephoévi-Gah, Sherifa El-Hadj Djibril, Elise Arrivé, Patrick Coffie, Didier Ekouevi, Antoine Jaquet, Valériane Leroy, Charlotte Lewden, Annie Sasco, Jean-Claude Azani, Gérard Allou, Franck Bohossou, Sophie Karcher, Jules Mahan Gonsan, Jérôme Le Carrou, Séverin Lenaud, Célestin Nchot, Karen Malateste, Amon Roseamonde Yao, Bertine Siloué, Gwenaelle Clouet, Hugues Djetouan, Alexandra Doring, Adrienne Kouakou, Elodie Rabourdin, Jean Rivenc, Xavier Anglaret, Boubacar Ba, Jean Bosco Essanin, Andrea Ciaranello, Sébastien Datté, Sophie Desmonde, Jean-Serge Elvis Diby, Apollinaire Gninlgninrin Horo, Serge N'zoré Kangah, Denis Malvy, David Meless, Aida Mounkaila-Harouna, Camille Ndondoki, Caroline Shiboski, Rodolphe Thiébaut, Pac-Ci, and Abidjan
- Subjects
Medicine ,Science - Abstract
HIV-2 is endemic in West Africa. There is a lack of evidence-based guidelines on the diagnosis, management and antiretroviral therapy (ART) for HIV-2 or HIV-1/HIV-2 dual infections. Because of these issues, we designed a West African collaborative cohort for HIV-2 infection within the framework of the International epidemiological Databases to Evaluate AIDS (IeDEA).We collected data on all HIV-2 and HIV-1/HIV-2 dually seropositive patients (both ARV-naive and starting ART) and followed-up in clinical centres in the IeDEA-WA network including a total of 13 clinics in five countries: Benin, Burkina-Faso Côte d'Ivoire, Mali, and Senegal, in the West Africa region.Data was merged for 1,754 patients (56% female), including 1,021 HIV-2 infected patients (551 on ART) and 733 dually seropositive for both HIV-1 and HIV 2 (463 on ART). At ART initiation, the median age of HIV-2 patients was 45.3 years, IQR: (38.3-51.7) and 42.4 years, IQR (37.0-47.3) for dually seropositive patients (p = 0.048). Overall, 16.7% of HIV-2 patients on ART had an advanced clinical stage (WHO IV or CDC-C). The median CD4 count at the ART initiation is 166 cells/mm(3), IQR (83-247) among HIV-2 infected patients and 146 cells/mm(3), IQR (55-249) among dually seropositive patients. Overall, in ART-treated patients, the CD4 count increased 126 cells/mm(3) after 24 months on ART for HIV-2 patients and 169 cells/mm(3) for dually seropositive patients. Of 551 HIV-2 patients on ART, 5.8% died and 10.2% were lost to follow-up during the median time on ART of 2.4 years, IQR (0.7-4.3).This large multi-country study of HIV-2 and HIV-1/HIV-2 dual infection in West Africa suggests that routine clinical care is less than optimal and that management and treatment of HIV-2 could be further informed by ongoing studies and randomized clinical trials in this population.
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- 2013
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40. Tuberculosis in antiretroviral treatment programs in lower income countries: availability and use of diagnostics and screening.
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Lukas Fenner, Marie Ballif, Claire Graber, Venerandah Nhandu, Jean Claude Dusingize, Claudia P Cortes, Gabriela Carriquiry, Kathryn Anastos, Daniela Garone, Eefje Jong, Joachim Charles Gnokoro, Omar Sued, Samuel Ajayi, Lameck Diero, Kara Wools-Kaloustian, Sasisopin Kiertiburanakul, Barbara Castelnuovo, Charlotte Lewden, Nicolas Durier, Timothy R Sterling, Matthias Egger, and International epidemiological Databases to Evaluate AIDS (IeDEA)
- Subjects
Medicine ,Science - Abstract
In resource-constrained settings, tuberculosis (TB) is a common opportunistic infection and cause of death in HIV-infected persons. TB may be present at the start of antiretroviral therapy (ART), but it is often under-diagnosed. We describe approaches to TB diagnosis and screening of TB in ART programs in low- and middle-income countries.We surveyed ART programs treating HIV-infected adults in sub-Saharan Africa, Asia and Latin America in 2012 using online questionnaires to collect program-level and patient-level data. Forty-seven sites from 26 countries participated. Patient-level data were collected on 987 adult TB patients from 40 sites (median age 34.7 years; 54% female). Sputum smear microscopy and chest radiograph were available in 47 (100%) sites, TB culture in 44 (94%), and Xpert MTB/RIF in 23 (49%). Xpert MTB/RIF was rarely available in Central Africa and South America. In sites with access to these diagnostics, microscopy was used in 745 (76%) patients diagnosed with TB, culture in 220 (24%), and chest X-ray in 688 (70%) patients. When free of charge culture was done in 27% of patients, compared to 21% when there was a fee (p = 0.033). Corresponding percentages for Xpert MTB/RIF were 26% and 15% of patients (p = 0.001). Screening practices for active disease before starting ART included symptom screening (46 sites, 98%), chest X-ray (38, 81%), sputum microscopy (37, 79%), culture (16, 34%), and Xpert MTB/RIF (5, 11%).Mycobacterial culture was infrequently used despite its availability at most sites, while Xpert MTB/RIF was not generally available. Use of available diagnostics was higher when offered free of charge.
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- 2013
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41. Patient retention and adherence to antiretrovirals in a large antiretroviral therapy program in Nigeria: a longitudinal analysis for risk factors.
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Man Charurat, Modupe Oyegunle, Renata Benjamin, Abdulrazaq Habib, Emeka Eze, Prince Ele, Iquo Ibanga, Samuel Ajayi, Maria Eng, Prosanta Mondal, Usman Gebi, Emilia Iwu, Mary-Ann Etiebet, Alash'le Abimiku, Patrick Dakum, John Farley, and William Blattner
- Subjects
Medicine ,Science - Abstract
Substantial resources and patient commitment are required to successfully scale-up antiretroviral therapy (ART) and provide appropriate HIV management in resource-limited settings. We used pharmacy refill records to evaluate risk factors for loss to follow-up (LTFU) and non-adherence to ART in a large treatment cohort in Nigeria.We reviewed clinic records of adult patients initiating ART between March 2005 and July 2006 at five health facilities. Patients were classified as LTFU if they did not return >60 days from their expected visit. Pharmacy refill rates were calculated and used to assess non-adherence. We identified risk factors associated with LTFU and non-adherence using Cox and Generalized Estimating Equation (GEE) regressions, respectively. Of 5,760 patients initiating ART, 26% were LTFU. Female gender (p < 0.001), post-secondary education (p = 0.03), and initiating treatment with zidovudine-containing (p = 0.004) or tenofovir-containing (p = 0.05) regimens were associated with decreased risk of LTFU, while patients with only primary education (p = 0.02) and those with baseline CD4 counts (cell/ml(3)) >350 and 2 hours to the clinic (p = 0.03), had total ART duration of >6 months (p200 at ART initiation were at a higher risk of non-adherence. Patients who disclosed their HIV status to spouse/family (p = 0.01) and were treated with tenofovir-containing regimens (p < or = 0.001) were more likely to be adherent.These findings formed the basis for implementing multiple pre-treatment visit preparation that promote disclosure and active community outreaching to support retention and adherence. Expansion of treatment access points of care to communities to diminish travel time may have a positive impact on adherence.
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- 2010
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42. An abundant biliary metabolite derived from dietary omega-3 polyunsaturated fatty acids regulates triglycerides.
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Grevengoed, Trisha J., Trammell, Samuel A. J., Svenningsen, Jens S., Makarov, Mikhail V., Nielsen, Thomas Svava, Brings Jacobsen, Jens Christian, Treebak, Jonas T., Calder, Philip C., Migaud, Marie E., Cravatt, Benjamin F., Gillum, Matthew P., Trammell, Samuel Aj, and Jacobsen, Jens Christian Brings
- Subjects
- *
UNSATURATED fatty acids , *OMEGA-3 fatty acids , *BILE acids , *FISH oils , *ETHYL esters , *FATTY liver prevention , *PROTEIN metabolism , *TRIGLYCERIDES , *PROTEINS , *DOCOSAHEXAENOIC acid , *BIOLOGICAL models , *RESEARCH , *ANTILIPEMIC agents , *GENETIC mutation , *AMIDASES , *LIVER , *FATTY liver , *ANIMAL experimentation , *RESEARCH methodology , *GENETIC disorders , *MEDICAL cooperation , *EVALUATION research , *HYPERLIPIDEMIA , *BILE , *COMPARATIVE studies , *ALKANES , *INTESTINAL absorption , *RESEARCH funding , *LIPID metabolism disorders , *MICE - Abstract
Omega-3 fatty acids from fish oil reduce triglyceride levels in mammals, yet the mechanisms underlying this effect have not been fully clarified, despite the clinical use of omega-3 ethyl esters to treat severe hypertriglyceridemia and reduce cardiovascular disease risk in humans. Here, we identified in bile a class of hypotriglyceridemic omega-3 fatty acid-derived N-acyl taurines (NATs) that, after dietary omega-3 fatty acid supplementation, increased to concentrations similar to those of steroidal bile acids. The biliary docosahexaenoic acid-containing (DHA-containing) NAT C22:6 NAT was increased in human and mouse plasma after dietary omega-3 fatty acid supplementation and potently inhibited intestinal triacylglycerol hydrolysis and lipid absorption. Supporting this observation, genetic elevation of endogenous NAT levels in mice impaired lipid absorption, whereas selective augmentation of C22:6 NAT levels protected against hypertriglyceridemia and fatty liver. When administered pharmacologically, C22:6 NAT accumulated in bile and reduced high-fat diet-induced, but not sucrose-induced, hepatic lipid accumulation in mice, suggesting that C22:6 NAT is a negative feedback mediator that limits excess intestinal lipid absorption. Thus, biliary omega-3 NATs may contribute to the hypotriglyceridemic mechanism of action of fish oil and could influence the design of more potent omega-3 fatty acid-based therapeutics. [ABSTRACT FROM AUTHOR]
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- 2021
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43. Kisspeptin and GPR54 immunoreactivity in a cohort of 518 patients defines favourable prognosis and clear cell subtype in ovarian carcinoma
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Mehl Erika, Kenney Challayne, Santos Jennifer L, McKinney Steven, Köbel Martin, Kalloger Steve, Klausen Christian, Prentice Leah M, Gilks C Blake, Leung Peter, Swenerton Ken, Huntsman David G, and Aparicio Samuel AJ
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Medicine - Abstract
Abstract Background Kisspeptins and their G-protein coupled receptor, GPR54 are required for GnRH release and have been associated with anti-metastatic tumour cell behaviour in model systems. The latter might suggest that their overexpression would be associated with a better prognosis in cancer. However, kisspeptin/GPR54 interactions (autocrine, paracrine, and/or endocrine) could also impact tumour behaviour in a negative manner. Here, for the first time, we associate the immunoreactivity of the kisspeptin/GPR54 ligand-receptor pair with favourable prognosis in a large cohort of ovarian carcinomas. Methods Immunohistochemical analysis for kisspeptin and GPR54 was performed on a tissue microarray (TMA) consisting of 518 early stage ovarian carcinomas, all with linked clinical outcome data. The TMA was scored using a staining intensity scale of 0 (negative), +1 (mild-moderate), and +2 (strong). Strong staining cases were considered either kisspeptin or GPR54 positive and designated as 1, while all other cases were considered negative and designated 0. All statistical analysis was conducted using two-sided tests and a p value equal to or less than 0.05 was considered significant. Results Kisspeptin and GPR54 immunoreactive cases show a favourable prognosis in univariable disease specific survival (p = 0.0023, p = 0.0092), as well as in overall survival (p = 0.0006, p = 0.0002). Furthermore, kisspeptin is an independent marker for favourable prognosis as determined by multivariable disease specific (p = 0.0046) and overall survival analysis (p = 0.0170), while GPR54 is an independent marker for overall survival only (p = 0.0303). Both kisspeptin positive and GPR54 positive cases are strongly associated with the ovarian carcinoma clear cell subtype (p < 0.0001, p < 0.0001), and GPR54 is significantly associated with favourable prognosis in overall survival within the clear cell subtype (p = 0.0102). Conclusion Kisspeptin and GPR54 immunoreactivity are significantly associated with favourable prognosis in both disease specific and overall survival, as well as being significantly associated with the clear cell ovarian carcinoma subtype, thereby creating the first independent prognostic biomarkers specific for ovarian clear cell carcinomas.
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- 2007
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44. A Phenomenological Qualitative Study Protocol and Semi-Structured Interview Guide Development to Identify Perceptions, Experiences, Facilitators and Inhibitors in Patients With Knee Osteoarthritis Undergoing Rehabilitation in a Low- and Middle-Income Country.
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Bathran C and Samuel AJ
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- Humans, Physical Therapy Modalities, Interviews as Topic, India, Developing Countries, Osteoarthritis, Knee rehabilitation, Qualitative Research
- Abstract
Background: Perceptions, experiences, facilitators, and inhibitors of disease among patients may be shaped by their lifestyle and cultural background. Despite the significance of understanding their perspectives and experiences about disease for the prevention and management of osteoarthritis (OA) through physiotherapy, this subject has not been explored among patients with knee OA (PKOA) from lower and middle-income countries (LMICs)., Purpose: This study aims to explore the perception, and experiences of knee OA and physiotherapy treatment and identify the facilitators and inhibitors of physiotherapy treatment in PKOA from a lower- and middle-income country, India., Method: 40 PKOA (n = 10 in each Kellgren and Lawrence grade) will be recruited using a purposive sampling technique. Data will be collected through semi-structured interviews which are composed of pre-determined open-ended questions. Based on patients' flexibility and feasibility, the interview will be conducted face-to-face or by telephone or videoconference. The interview will be recorded using a digital audio recorder. Recorded data will be transcribed verbatim. Data will be analysed using thematic analysis based on the Braun and Clark approach., Results: The verbatim transcript will be evaluated to identify sub-themes and themes through thematic analysis. Generated data will be investigated through inductive qualitative analysis to examine the viewpoints of PKOA., Conclusion: This study will explore the patients' perspectives, experiences, and the factors which will facilitate and inhibit the physiotherapy treatment for knee osteoarthritis. The result might reveal a new way to promote insightful decision-making towards physiotherapy care for PKOA and help to improve their access to physiotherapy care., (© 2024 John Wiley & Sons Ltd.)
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- 2024
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45. Patients' Experiences, Satisfaction and Quality of Life With Physiotherapy Follow-Up After Total Knee Arthroplasty: A Phenomenological Qualitative Study Protocol.
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Shetty S and Samuel AJ
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- Humans, Male, Middle Aged, Female, Aged, Arthroplasty, Replacement, Knee rehabilitation, Arthroplasty, Replacement, Knee psychology, Patient Satisfaction, Quality of Life, Qualitative Research, Physical Therapy Modalities
- Abstract
Introduction: Available quantitative studies indicate that patients who have undergone Total Knee Arthroplasty (TKA) experience dissatisfaction. There is a lack of comprehensive information on the experiences, satisfaction, and quality of life of patients after TKA. Hence, there is a need to explore the patients' perspective about the satisfaction and experiences undergoing rehabilitation and to explore the factors influencing quality of life with physiotherapy after 1st and 3rd months of TKA., Methods: 35 patients with post TKA, aged from 45 years, will participate in semi-structured face-to-face or telephone interviews. The participants will be recruited using criterion-based purposive sampling. The interviews will be audio-recorded and transcribed. NVivo 14V software and Braun and Clarke thematic analysis will be used. Credibility, transferability, dependability, and confirmability will be ensured., Results: The transcribed verbatim transcript will be analysed to generate sub-themes and themes using thematic analysis. Irrespective of the responses received from male or female patients' data would be analysed using inductive qualitative analysis to explore their perspectives., Conclusion: This study is the first qualitative study from lower- and middle-income country that aims to investigate the satisfaction and experiences of patients after undergoing TKA rehabilitation. The efficacy of the data and subsequent suggestions would rely on the insights generated from the qualitative study, which would support the rehabilitation of patients in their later years., (© 2024 John Wiley & Sons Ltd.)
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- 2024
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46. Mobile game addiction and its association with musculoskeletal pain among students: A cross-sectional study.
- Author
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Ahmed S, Samuel AJ, Mishra A, Rahman MS, Islam MA, Rashaduzzaman M, Roy SK, Akter R, and Islam MJ
- Subjects
- Humans, Male, Female, Cross-Sectional Studies, Young Adult, Adult, Adolescent, Surveys and Questionnaires, Risk Factors, Musculoskeletal Pain epidemiology, Video Games adverse effects, Students, Behavior, Addictive epidemiology
- Abstract
Background: The purpose of this study was to ascertain whether there is a difference in musculoskeletal pain between those who are addicted to mobile games and those who are not, to ascertain the association between mobile game addiction and socio-demographic variables, and to ascertain the pain predictor for mobile game addiction on different musculoskeletal regions., Methods: There were 840 students in all, both males and females, in this cross-sectional survey from three distinct Bangladeshi institutions. The Nordic Musculoskeletal Discomfort Questionnaire, the Gaming Addiction Scale, and the demographic data form were distributed to the participants. The data were analyzed using the Chi-square test and descriptive statistics. Binary logistic regression was used to find the predicted risk factor for mobile gaming addiction., Results: Musculoskeletal pain affects 52.1% of participants in some part of the body. Males have a 2.01-fold higher likelihood of developing gaming addiction compared to females. Those who are addicted to mobile games experience a higher occurrence of pain in the neck, upper back, elbows, and wrist and hands with a odds ratio of (OR 2.84, 95% CI: 1.49-5.36; p = 0.016), (OR 3.75, 95% CI 1.97-7.12; p = <0.001), (OR 3.38, 95% CI 1.34-8.50; p = 0.010), and (OR 2.14, 95% CI 1.00-4.57; p = 0.049) respectively., Conclusion: These results demonstrate that mobile gaming addiction raises students' risk of musculoskeletal discomfort. Two-three times higher risk of developing pain in the neck, upper back, elbows, and wrist and hands among mobile game addicts., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2024 Ahmed et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2024
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47. Lived experiences of caregivers and survivors of paediatric spinal cord injury: A scoping review of qualitative studies.
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Saxena A, Samuel AJ, and Singh M
- Subjects
- Humans, Child, Qualitative Research, Emotions, Survivors, Caregivers psychology, Spinal Cord Injuries rehabilitation
- Abstract
Context: Paediatric Spinal Cord Injury (SCI) has an impact on a child's dynamic development, disrupting their participation in school, community, and social relationships while simultaneously causing repercussions on their caregiver's life. The rare nature of paediatric SCI calls for a detailed inspection of the literature from the perspective of children and their caregivers., Objective: This scoping review of qualitative research determines the extent of literature from perspective of caregivers and individuals with paediatric SCI., Methods: 9351 full-text published articles were identified from CINAHL, Ovid, PubMed, and Scopus between 2001 and 2021. After duplicate deletion, 8354 articles were left, and 103 full-text articles were assessed for their eligibility. Finally, eight articles were assessed for their relevance. Key themes that emerged from the data were summarized, compared, and synthesized., Results: Six studies were from the perspectives of individuals with SCI and two from caregiver's perspective. Three major themes were identified from caregivers' opinion studies: "Obstacles to community participation"; "Unmet needs related to a child with SCI"; and "Radiating effect on caregivers' lives"; whereas five were obtained from individuals with paediatric SCI opinion studies: "Adjusting to life with SCI"; "Hardships & hardiness"; "Peers & family/emotional support"; "Perception of self & body-image post injury"; and "Transitioning into post-traumatic life"., Conclusion: There is a need for more specialized rehabilitation centers and an accessible environment in public spaces. Also, the review sheds some light on the discriminatory attitude of society as a whole, which can be improved by providing proper knowledge and awareness of SCI.
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- 2024
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48. Web-based E-survey in identifying current physiotherapy practices in paediatric burns.
- Author
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Kaur D, Sharma N, and Samuel AJ
- Subjects
- Child, Humans, Quality of Life, Cross-Sectional Studies, Surveys and Questionnaires, Physical Therapy Modalities, Internet, Burns rehabilitation
- Abstract
Introduction: Physiotherapy practices in pediatric burns involves relaxation techniques and exercise training for attaining physical fitness, improving quality of life and, thereby to prevent primary and secondary complications. Physical activity and exercise act as a meaningful and purposeful tool for attaining physical fitness after burn injury., Aim: The aim of this e-survey is to identify the current practices of physiotherapy interventions in pediatric burn rehabilitation among physiotherapy students and professionals., Methods: The e-survey was created with validated questionnaire using a Google Forms to gather the information related to current physiotherapy practices in pediatric burns. After the sample size estimation, survey link were sent to identified 144 physiotherapy students and professionals using social networking sites which includes, WhatsApp, Facebook and Instagram for this cross-sectional e-survey. The frequency and percentage of survey responses were analyzed., Results: Among 144 identified participants, 62 participants completed the survey, resulting in the response rate of (43.0%). The findings of this study revealed that> 50% of physiotherapy students, and professionals, are performing pain and scar assessment, along with their regular physiotherapy management in children with burns. In addition to these, they also practice physiotherapy for burn conditions in pediatric intensive care units (PICU), pediatric wards, and clinical outpatient department (OPD) settings., Conclusion: Physiotherapy students and professionals have sufficient knowledge regarding pediatric burns complications, and also, they are well aware regarding recent physiotherapy practices in pediatric burn care management., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd and International Society of Burns Injuries. All rights reserved.)
- Published
- 2023
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49. A Systematic Review of Multisensory Stimulation on Procedural Pain Among Preterm Neonates.
- Author
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Sharma N and Samuel AJ
- Subjects
- Infant, Newborn, Humans, Intensive Care, Neonatal, Pain, Procedural prevention & control
- Abstract
Purpose: This systematic review aims to evaluate the quality of studies and synthesize the literature on multisensory stimulation (MSS) on procedural pain among hospitalized preterm neonates., Summary of Key Points: Search strategies were applied to PubMed/Medline, CINAHL, SCOPUS, and PEDro. A total of 414 studies were identified, 104 were screened, and 4 were included. Two independent reviewers extracted data from identified studies that were synthesized qualitatively and quantitatively., Conclusion and Recommendations for Clinical Practice: There is strong evidence of MSS in decreasing procedural pain, but additional research is needed to identify the beneficial effects of MSS with a standardized protocol to promote good clinical practice in neonatal intensive care settings., What This Adds to the Evidence: High-quality evidence supports beneficial effects of MSS, but standardization of the MSS protocol and its administration needs to be established., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2023 Academy of Pediatric Physical Therapy of the American Physical Therapy Association.)
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- 2023
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50. Reliability and Reference Norms of Single Heel-Rise Test Among Children: A Cross-sectional Study.
- Author
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Mishra R, Aranha VP, and Samuel AJ
- Subjects
- Humans, Child, Cross-Sectional Studies, Reproducibility of Results, Leg, Heel, Muscle, Skeletal physiology
- Abstract
There is a lack of data regarding the single heel-rise test (SHRT) among children. Hence, we aimed to establish reliability and reference norms of SHRT among children aged 8 to 12 years. About 500 healthy children were randomly selected from the recognized school and community settings. After demographic measurements, SHRT was conducted to evaluate the strength of each plantar flexors. SHRT repetitions were assessed by the same rater on 2 occasions for intrarater (on the same day) and test-retest reliability (on different days) and by 2 raters for inter-rater reliability. Relative reliability was described in terms of the intraclass correlation coefficient (ICC) and Pearson correlation coefficient (r). Absolute reliability was indicated by the standard error of measurement (SEm), minimal detectable change (MDC), and Bland-Altman graph. The mean of the number of repetitions of SHRT was calculated to derive the reference norm of SHRT. The anthropometric parameters were correlated with SHRT for multiple regression analysis. Intrarater, test-retest, and inter-rater reliability of SHRT were, ICC = 0.81, ICC = 0.70, and ICC = 0.57, respectively. The Bland-Altman graph confirmed limits of agreement for intrarater, test-retest, and inter-rater reliability. The reference norm of SHRT is documented to be 20.6 ± 4.8. SEm and MDC are found to be 2 and 3, respectively. Multiple regression analysis predicted a correlation of age, weight, and calf muscle girth with SHRT. SHRT is moderate to good reliable in assessing the strength of plantar flexors. The reference norms of SHRT have been derived for healthy children aged 8 to 12 years., (Copyright © 2022 the American College of Foot and Ankle Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
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