29 results on '"Mensah EA"'
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2. Improving the Establishment and Yield of Soybean through Planting Depth and Land Preparation Methods in Northern Ghana
- Author
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Lawson, IYD, primary, Mensah, EA, additional, and Yeboah, EN, additional
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- 2009
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3. A proposed One Health approach to control yellow fever outbreaks in Uganda.
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Mensah EA, Gyasi SO, Nsubuga F, and Alali WQ
- Abstract
Yellow Fever (YF) is an acute viral hemorrhagic disease. Uganda is located within the Africa YF belt. Between 2019 and 2022, the Ugandan Health Authorities reported at least one outbreak of YF annually with an estimated 892 suspected cases, on average per year. The persistent recurrence of this disease raises significant concerns about the efficacy of current response strategies and prevention approaches. YF has been recognized as a One Health issue due to its interrelatedness with the animal and environmental domains. Monkeys have been recognized as the virus primary reservoir. The YF virus is transmitted through bites of infected Aedes or Haemagogus species mosquitoes between monkeys and humans. Human activities, monkey health, and environmental health issues (e.g., climate change and land use) impact YF incidence in Uganda. Additionally, disease control programs for other tropical diseases, such as mosquitoes control programs for malaria, impact YF incidence.This review adopts the One Health approach to highlight the limitations in the existing segmented YF control and prevention strategies in Uganda, including the limited health sector surveillance, the geographically localized outbreak response efforts, the lack of a comprehensive vaccination program, the limited collaboration and communication among relevant national and international agencies, and the inadequate vector control practices. Through a One Health approach, we propose establishing a YF elimination taskforce. This taskforce would oversee coordination of YF elimination initiatives, including implementing a comprehensive surveillance system, conducting mass YF vaccination campaigns, integrating mosquito management strategies, and enhancing risk communication. It is anticipated that adopting the One Health approach will reduce the risk of YF incidence and outbreaks., (© 2024. The Author(s).)
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- 2024
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4. Effects of vasoactive substances on biomechanics of small resistance arteries of male and female Dahl salt-sensitive rats.
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Mensah EA, Daneshtalab N, and Tabrizchi R
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- Rats, Male, Female, Animals, Rats, Inbred Dahl, Biomechanical Phenomena, Arteries, Phenylephrine pharmacology, Sodium Chloride, Pulse Wave Analysis, Hypertension
- Abstract
Changes in vascular biomechanics leading to increase in arterial stiffness play a pivotal role in circulatory dysfunction. Our objectives were to examine sex-specific pharmacological changes related to the biomechanics and any structural modifications in small resistance arteries of Dahl salt-sensitive male and female rats. The composite Young modulus (CYM) was determined using pressure myograph recordings, and immunohistochemistry was used for the evaluation of any structural changes in the third-order mesenteric arteries (n = 6). Animals on high-salt diet developed hypertension with significant elevation in central and peripheral blood pressures and pulse wave velocity compared to those on regular diet. There were no significant differences observed in the CYM between any of the groups (i.e., males and females) in vehicle-treated time-control studies. The presence of verapamil (0.3 μM) significantly reduced CYM in hypertensive males without changes within females compared to vehicle. This effect was abolished by phenylephrine (0.3 μM). BaCl
2 (100 μM), ouabain (100 μM), and L-NAME (0.3 μM) combined significantly increased CYM in vessels from in normotensive males and females but not in hypertensive males compared to vehicle. The increase in CYM was abolished in the presence of phenylephrine. Sodium nitroprusside (0.3 μM), in the presence of phenylephrine, significantly reduced CYM in male normotensive versus hypertensive, with no differences within females. Significant differences were observed in immunohistochemical assessment of biomechanical markers of arterial stiffness between males and females. Our findings suggest sex possibly due to pressure differences to be responsible for adaptive changes in biomechanics, and varied pharmacological responses in hypertensive state., (© 2024 The Authors. Pharmacology Research & Perspectives published by British Pharmacological Society and American Society for Pharmacology and Experimental Therapeutics and John Wiley & Sons Ltd.)- Published
- 2024
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5. Atrial fibrillation, transient ischaemic attack and stroke in older people. A themed collection in age and ageing journal.
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Mensah EA, Masoli JAH, and Rajkumar C
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- Humans, Aged, Risk Factors, Aging, Ischemic Attack, Transient diagnosis, Ischemic Attack, Transient epidemiology, Ischemic Attack, Transient therapy, Atrial Fibrillation diagnosis, Atrial Fibrillation epidemiology, Atrial Fibrillation therapy, Stroke diagnosis, Stroke epidemiology, Stroke therapy
- Abstract
With an increase in the ageing population, there is a rise in the burden of cardiovascular disease. Age and Ageing have compiled collections of their key cardiovascular themed papers. The first Age and Ageing Cardiovascular Collection focussed on blood pressure, coronary heart disease and heart failure. In this second collection, publications since 2011 were selected with emphasis on atrial fibrillation, transient ischaemic attack (TIA) and stroke. The prevalence of TIA and stroke increases as people get older. In this commentary we summarise studies published in Age and Ageing that bring to the fore the need for a multidisciplinary, person-centred approach to care, conscientious identification of risk factors and their management and prevention strategies, which will inform policy ultimately reducing the burden of cost placed by stroke care on healthcare financing. Read the latest Cardiovascular Collection here., (© The Author(s) 2023. Published by Oxford University Press on behalf of the British Geriatrics Society. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2023
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6. Implementation of a medicine management plan (MMP) to reduce medication-related harm (MRH) in older people post-hospital discharge: a randomised controlled trial.
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Ali K, Mensah EA, McDermott EA, Kirkham FA, Stevenson J, Hamer V, Parekh N, Schiff R, Van Der Cammen T, Nyangoma S, Fowler-Davis S, Davies G, Gage H, and Rajkumar C
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- Humans, Aged, State Medicine, Hospitalization, Hospitals, Patient Discharge, Aftercare
- Abstract
Background: Medication-related harm (MRH) is an escalating global challenge especially among older adults. The period following hospital discharge carries high-risk for MRH due to medication discrepancies, limited patient/carer education and support, and poor communication between hospital and community professionals. Discharge Medical Service (DMS), a newly introduced NHS scheme, aims to reduce post-discharge MRH through an electronic communication between hospital and community pharmacists. Our study team has previously developed a risk-prediction tool (RPT) for MRH in the 8-weeks period post discharge from a UK hospital cohort of 1280 patients. In this study, we aim to find out if a Medicines Management Plan (MMP) linked to the DMS is more effective than the DMS alone in reducing rates of MRH., Method: Using a randomized control trial design, 682 older adults ≥ 65 years due to be discharged from hospital will be recruited from 4 sites. Participants will be randomized to an intervention arm (individualised medicine management plan (MMP) plus DMS) or a control arm (DMS only) using a 1:1 ratio stratification. Baseline data will include patients' clinical and social demographics, and admission and discharge medications. At 8-weeks post-discharge, a telephone interview and review of GP records by the study pharmacist will verify MRH in both arms. An economic and process evaluation will assess the cost and acceptability of the study methods., Data Analysis: Univariate analysis will be done for baseline variables comparing the intervention and control arms. A multivariate logistic regression will be done incorporating these variables. Economic evaluation will compare the cost-of-service use among the study arms and modelled to provide national estimates. Qualitative data from focus-group interviews will explore practitioners' understanding, and acceptance of the MMP, DMS and the RPT., Conclusion: This study will inform the use of an objective, validated RPT for MRH among older adults after hospital discharge, and provide a clinical, economic, and service evaluation of a specific medicines management plan alongside the DMS in the National Health Service (UK)., (© 2022. The Author(s).)
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- 2022
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7. Knowledge and awareness of mitochondrial diseases among physicians in the tertiary hospitals in Ghana.
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Mensah EA, Sarfo B, Yawson AE, Arthur J, and Ocloo A
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- Humans, Male, Female, Ghana epidemiology, Tertiary Care Centers, Surveys and Questionnaires, Health Knowledge, Attitudes, Practice, Physicians, Mitochondrial Diseases diagnosis, Mitochondrial Diseases epidemiology, Mitochondrial Diseases genetics
- Abstract
Background: Mitochondrial diseases/disorders (MDs), for decades, have been identified as a key underlying condition for many chronic diseases globally. However, data on the knowledge and prevalence of MDs in many countries in sub-Saharan Africa are lacking. This study assessed the knowledge, and awareness, of MDs among senior medical doctors in the five tertiary hospitals in Ghana., Method: Data were collected from one hundred and twenty-eight (128) medical doctors in the five Tertiary Hospitals in Ghana using both closed and open-ended questionnaires and analysed using descriptive statistics., Results: Of the 128 respondents, 70.32% were senior medical officers and above, 87% of them indicated that they were aware of MDs and over 90% said physicians do not often diagnose MDs in Ghana. About 81% indicated that MDs are associated with chronic illnesses whilst 72% said the disease is diagnosed in both males and females. About 45% of the respondents alluded to the fact that MDs are difficult to diagnose, are associated with mutations in both the mitochondrial and the nuclear DNA, and are non-infectious diseases. Approximately 85% said nervous system dysfunction and muscle weakness are some of the symptoms associated with MDs whilst 77% said fatigue is also one of the symptoms. About 38% of the respondents specified that they encounter myopathies. A majority (70%) did not know about the availability of any consensus or standard diagnostic procedure and/or drugs for MDs., Conclusion: There is a high level of knowledge and awareness of MDs among the respondents. However, there is a low disease encounter, which could be due to a lack of diagnostic protocols or a low disease prevalence. It is, therefore recommend that a patient perspective study, which looks at clinical records and laboratory data be conducted to fully ascertain the prevalence of MDs in Ghana and that appropriate educational strategies and interventions aimed at improving the diagnosis of mitochondrial diseases in Ghana be put in place., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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8. Voluntary Counseling and Testing, Antiretroviral Therapy Access, and HIV-Related Stigma: Global Progress and Challenges.
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Armstrong-Mensah EA, Tetteh AK, Ofori E, and Ekhosuehi O
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- Anti-Retroviral Agents therapeutic use, Counseling, Humans, Social Stigma, Acquired Immunodeficiency Syndrome diagnosis, Acquired Immunodeficiency Syndrome drug therapy, Acquired Immunodeficiency Syndrome prevention & control, HIV Infections diagnosis, HIV Infections drug therapy, HIV Infections prevention & control
- Abstract
To date, about 37 million people are living with the human immunodeficiency virus (HIV) and an estimated 680,000 people have died from acquired immune deficiency syndrome (AIDS) related illnesses globally. While all countries have been impacted by HIV, some have been significantly more impacted than others, particularly countries in sub-Saharan Africa. The purpose of this paper was to identify progress made in HIV prevention globally, particularly in the areas of voluntary counseling and testing (VCT) uptake, access to antiretroviral therapy (ART), and HIV-related stigma. With the development of ART, a cocktail of medications for the treatment of HIV, VCT uptake increased, as it became apparent that the medication would only be prescribed after an HIV diagnosis through testing. Widely considered a critical gateway to HIV prevention and treatment, VCT is being implemented in many countries, and as a result, about 38 million people living with HIV in 2018 had access to ART. Regardless of this success, major challenges still remain. We did an electronic search of 135 articles in English related to global HIV progress and challenges indexed in PubMed, ResearchGate, Google, and other search engines from 1998 to 2021. Sixty articles met the inclusion criteria for this paper. Data on trends in ART coverage were obtained from the Joint United Nations Programme on HIV/AIDS (UNAIDS) website. These data were used to show ART coverage globally in World Health Organization (WHO) regions. It was found that while global successes have been chalked in the areas of VCT uptake and ART coverage, HIV-related stigma has impeded greater success. This paper summarizes and discusses global successes and challenges in HIV prevention efforts in the past four decades with a focus on VCT, ART, and HIV-related stigma.
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- 2022
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9. Visualization and analysis of mapping knowledge domains for the global transition towards clean cooking: a bibliometric review of research output from 1990 to 2020.
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Afrane S, Ampah JD, and Mensah EA
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- Biofuels, China, Cooking methods, Family Characteristics, Humans, Air Pollution, Indoor analysis
- Abstract
Current statistics report that 2.6 billion households across the globe rely on polluting and inefficient cooking fuels and technologies, posing death-threatening health risks to people mainly from developing countries/regions. Several studies on clean cooking have been conducted with the emergence of international organizations such as the Clean Cooking Alliance to raise awareness. In the current study, a bibliometric tool, CiteSpace, was employed to analyze the 877 documents retrieved from the SCI-EXPANDED, SSCI, and A&HCI databases on clean cooking research from 1990 to 2020. The results reveal that interest in clean cooking research took a sharp rise in the last decade, especially after 2016. The research field has become increasingly interdisciplinary but has mostly centered on environment, energy, and health. The most productive countries/regions in this field are the USA, India, England, and China. The keyword and citation analyses indicate that research in this field mostly focuses on adverse impacts of household air pollution from unclean cooking fuels and technologies on the environment and public health particularly, in developing countries/regions. Also, the drivers and barriers to the large-scale adoption of clean cooking fuels and technologies have become a topic of interest in recent years. The three most studied clean cooking fuels among various regions are LPG, biogas, and electricity. This study synthesizes global research on clean cooking and may be beneficial to other researchers in understanding current trends in this field and serve as a guide for concentrating on the most important topics., (© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2022
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10. Preparing Students for the Public Health Workforce: The Role of Effective High-Impact Educational Practices in Undergraduate Public Health Program Curricula.
- Author
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Armstrong-Mensah EA, Ramsey-White K, Alema-Mensah E, and Yankey BA
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- Curriculum, Humans, Students, United States, Workforce, Health Workforce, Public Health education
- Abstract
There are several institutions of higher learning in the United States that award degrees in public health to undergraduate students. While these institutions serve as potential pipelines for the public health workforce, it is unclear if the curricula and training students receive from these institutions, really prepare them for the public health workforce or higher education. The questions sometimes asked are whether the programs offered by these institutions exist to provide students with a good understanding of public health issues so they can become good citizens for building a responsible society, or if it is to prepare students for graduate school. Regardless of what the goals are, students in undergraduate public health programs need to be exposed to curricula that adequately prepare them to enter well-defined careers in public health. Thus, institutions of higher learning offering degrees in public health to undergraduate students need to understand the market, assess, and understand the needs of public health agencies, and tailor course curricula to match those needs. Georgia State University established its undergraduate public health program in 2016. Since then, over 200 students have graduated from the program. The purpose of the study was to assess student perception of the role of high impact educational practices such as study abroad, signature experience, and undergraduate research curricula in preparing them for careers in public health., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Armstrong-Mensah, Ramsey-White, Alema-Mensah and Yankey.)
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- 2022
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11. Differential biomechanics in resistance arteries of male compared with female Dahl hypertensive rats.
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Mensah EA, Daneshtalab N, and Tabrizchi R
- Subjects
- Animals, Biomechanical Phenomena, Blood Pressure physiology, Female, Humans, Male, Mesenteric Arteries, Rats, Rats, Inbred Dahl, Hypertension, Pulse Wave Analysis
- Abstract
Background: Increase in vascular stiffness is associated with a higher risk of cardiovascular morbidity and mortality and is likely sex-specific., Method: Our objectives were to compare structural and functional alterations in small resistance arteries as related to vascular stiffness from Dahl salt-sensitive male and female rats (n = 8, mean ± s.e.m.)., Results: Arterial blood pressure and pulse wave velocity were significantly (P < 0.05) elevated in males (161 ± 3 mmHg; 6.4 ± 0.2 m/s) and females (147 ± 2 mmHg; 5.5 ± 0.1 m/s) on a high (H) salt compared with regular (R) diets but were significantly higher in males (H) than in all others. Significant increases in collagen and smooth muscle cell areas were evident in ultrastructure of mesenteric arteries of hypertensive males compared to normotensive or corresponding females. There were no significant differences in composite Young's modulus (CYM) between groups. Vasoconstriction resulted in significantly higher CYM in male (H: 8.6 ± 1 KPa) than R (4.5 ± 0.8 KPa), and the corresponding females (H: 5.6 ± 0.6 KPa and R: 5 ± 0.9 KPa). In contrast, vasodilation significantly reduced CYM in the male groups (H: 2.5 ± 0.4 KPa and R: 2.7 ± 0.5 KPa) compared with the corresponding values in females (H: 4.2 ± 0.6 KPa and R: 5 ± 0.5 KPa). Moreover, the slope of pressure-volume curves revealed significantly greater distended vascular compliance in male H than R, and the corresponding females., Conclusion: Our findings are supportive of a link between high salt intake and elevated blood pressure as being sex specific, likely involving sex-dependent changes in ultrastructure of the vessels, which ultimately may alter the biomechanics, and thus, the haemodynamic functions of both macro-circulation and micro-circulations., (Copyright © 2021 The Author(s). Published by Wolters Kluwer Health, Inc.)
- Published
- 2022
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12. The evidence of politics in trans-fatty acid regulation in Mexico.
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Idris IO, Mensah EA, and Gavkalova N
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- Coronary Disease epidemiology, Coronary Disease mortality, Humans, Mexico epidemiology, Dietary Fats, Unsaturated adverse effects, Government Regulation, Politics, Trans Fatty Acids adverse effects
- Abstract
According to the World Health Organization, coronary heart disease (CHD)-caused deaths accounted for one-fifth of the total deaths in Mexico in 2017. Researches done in the past have confirmed the association between dietary trans-fatty acids (TFA) and CHD. Dietary TFA are mostly derived from industrial-hydrogenated oils, milk products, and meat fats. This paper is a build on of a policy paper done on international policies for TFA in low-to-middle income countries, using Mexico as the case study. This write up, however, aims to critically analyse the TFA regulation policy process in Mexico, evaluating the strength of evidence proposed and identifying the barriers preventing the usage of the evidence for a TFA regulation policy implementation. Although evidence abounds for TFA regulation policy, lack of effective collaboration and communication among the major actors (researchers, policy-makers, and consumers) in Mexico remains a major setback in its implementation.
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- 2021
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13. Ebola virus disease surveillance in the absence of a confirmed case; the case of the Rwenzori region of Uganda.
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Mensah EA, Kisakye A, and Gyasi SO
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- Adolescent, Adult, Aged, Humans, Middle Aged, Uganda epidemiology, Young Adult, Disease Outbreaks prevention & control, Hemorrhagic Fever, Ebola prevention & control, Population Surveillance methods, Public Health
- Abstract
Introduction: the August 2018 ebola outbreak in the Democratic Republic of Congo turns out to be second largest outbreak of ebola in public health history. The response to the outbreak which would have halted wider spread to neighboring countries failed. Hence, high risk districts in Uganda initiated preparedness activities in the wake of a possible inflow of cases. This study was therefore designed to identify, describe and assess surveillance activities and preparedness in the Kasese, Ntoroko and Bundibugyo districts of Uganda., Methods: the study employed the mixed method approach. The qualitative arm involved the use of participant observation to describe surveillance activities that were carried out as part of the ebola preparedness surveillance in the high-risk districts. The quantitative arm included assessment of 102 health facilities on ebola virus disease preparedness with a WHO standard checklist hosted on the Open Data Kit software. Descriptive statistics were performed using STATA (version 14)., Results: the study showed that high risk districts employed numerous interlocking public health emergency activities which included readiness assessment, risk mapping and temperature-based screening for ebola at points of entry. Most health workers (91.18%) could correctly state the case definition of ebola although only 56.86% of them were trained on ebola surveillance., Conclusion: health worker knowledge on ebola virus disease case definition was high but training and logistics were inadequate. Continuous efforts are required to sustain health workers knowledge on ebola surveillance through trainings and supportive supervision whiles addressing gaps in the operation of ebola screening posts., Competing Interests: The authors declare no competing interests., (Copyright: Emmanuel Angmorteh Mensah et al.)
- Published
- 2020
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14. Individual and Community Factors Associated with Household Insecticide-Treated Bednet Usage in the Sunyani West District of Ghana Two Years after Mass Distribution.
- Author
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Mensah EA and Anto F
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- Adult, Aged, Female, Ghana epidemiology, Humans, Logistic Models, Malaria transmission, Male, Middle Aged, Mosquito Control methods, Ownership statistics & numerical data, Young Adult, Community Participation statistics & numerical data, Family Characteristics, Insecticide-Treated Bednets statistics & numerical data, Malaria prevention & control, Mosquito Control statistics & numerical data
- Abstract
Purpose: In the year 2015, the Ghana Health Service launched a free mass insecticide-treated net (ITN) distribution campaign in the Sunyani West district of Ghana with the aim of improving household ownership to increase usage. This study determined the level of ownership and usage of ITNs and associated factors among households in the Sunyani West district two years after the mass distribution campaign., Methods: Study participants were identified using the systematic approach in all five subdistricts of the Sunyani West district and interviewed, and data were collected on household ITN ownership. Data were also collected on the source of the ITN and whether the respondent slept under an ITN the previous night. Data on individual and community factors associated with ITN ownership and usage were also collected. Pearson chi-square tests and logistic regression were performed to determine factors significantly associated with ITN ownership and usage., Results: The level of ITN ownership was 78.93% and usage was 55.93%. Most of the participants (73.62%) received their nets during the 2015 mass distribution campaign, 39 (11.96%) received their ITNs during antenatal care visits, whilst 27 (8.28%) bought the nets from the store. People who experience irritation ( χ
2 = 23.32; p < 0.001) and respondents who did not perceive themselves as likely to be beaten by mosquitoes or get malaria ( χ2 = 26.61; p < 0.001) were less likely to use ITNs. Respondents who used other malaria/mosquito bite prevention methods were also less likely to use the ITNs ( χ2 = 206.26; p = 0.001), but individuals who received free nets were likely to use them., Conclusion: ITN ownership was high, but usage was low and far below the national target. Intense health education emphasizing the fact that everybody is susceptible to malaria may help improve usage., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2020 Emmanuel Angmorteh Mensah and Francis Anto.)- Published
- 2020
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15. Prevalence of non-communicable diseases and its risk factors among Ijegun-Isheri Osun residents in Lagos State, Nigeria: a community based cross-sectional study.
- Author
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Idris IO, Oguntade AS, Mensah EA, and Kitamura N
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- Adult, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Nigeria epidemiology, Prevalence, Risk Factors, Surveys and Questionnaires, Diabetes Mellitus epidemiology, Dyslipidemias epidemiology, Hypertension epidemiology, Noncommunicable Diseases epidemiology, Urban Population statistics & numerical data
- Abstract
Background: The rapid epidemiologic transition of diseases has adverse implications for low-and middle-income countries (LMICs) like Nigeria due to their limited healthcare, weaker health systems and the westernization of lifestyle. There is a need to evaluate the enormity or otherwise of non-communicable diseases (NCDs) burden in such low resource settings. We performed this survey to determine the prevalence of NCDs and its risk factors among the Ijegun- Isheri Osun community residents of Lagos, Nigeria., Methods: A community-based cross-sectional survey was performed on 215 respondents recruited consecutively during a population preventive health campaign. Prevalence of three NCDs (hypertension, diabetes and dyslipidaemia) were calculated. Associations between each of these NCDs and selected risk factors were determined using chi square test. Multivariable logistic regression was used to estimate the risk factors of each of the three NCDs., Results: The prevalence of hypertension was 35.3% (95% CI 29.0-42.1), diabetes 4.6% (95% CI 2.2-8.4) and dyslipidaemia 47.1% (95% CI 41.1-54.8). Among the NCD risk factors, the prevalence of smoking was 41.3% (95% CI 34.2-48.6), alcohol consumption 72.5% (95% CI 65.5-78.7), and physical activity 52.9 (95% CI 45.5-60.2). The independent significant predictors of hypertension were age ≥ 60 years (aOR 4.56; 95% CI: 1.72-12.09) and dyslipidaemia (aOR 5.01; 95% CI: 2.26-11.13). Age ≥ 60 years (aOR 8.83; 95% CI: 1.88-41.55) was an independent predictor of diabetes. Age ≥ 60 years (aOR 29.32; 95% CI: 4.78-179.84), being employed (aOR 11.12; 95% CI: 3.10-39.92), smoking (aOR 2.34; 95% CI: 1.03-5.33) and physical activity (aOR 0.34; 95% CI: 0.15-0.76) were independent predictors of having dyslipidaemia., Conclusions: The prevalence of hypertension, diabetes and dyslipidaemia and their associated risk factors are high among the respondents of Ijegun-Isheri Osun community of Lagos state, Nigeria. This highlights the need for further implementation research and policy directions to tackle NCD burden in urban communities in Nigeria. These strategies must be community specific, prioritizing the various risk factors and addressing them accordingly.
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- 2020
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16. Association between Antiretroviral Treatment and Markers of Systemic Inflammation among HIV Patients in Ghana.
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Haile ZT, Sarfo B, Bonney EY, Mensah EA, and Deletsu S
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- Adult, Anti-HIV Agents therapeutic use, Drug Therapy, Combination, Female, Ghana, Humans, Interleukin-18 blood, Interleukin-18 therapeutic use, Interleukin-6 blood, Interleukin-6 therapeutic use, Male, Middle Aged, Receptors, Immunologic blood, Receptors, Immunologic therapeutic use, Tumor Necrosis Factors blood, Tumor Necrosis Factors therapeutic use, Urban Population statistics & numerical data, Acquired Immunodeficiency Syndrome drug therapy, Anti-Retroviral Agents adverse effects, Anti-Retroviral Agents therapeutic use, Biomarkers blood, HIV Infections drug therapy, Inflammation chemically induced
- Abstract
Background: Studies from high-income countries have reported that even after receiving antiretroviral treatment (ART), HIV-infected adults may not achieve normal levels of certain inflammatory markers that are known to be associated with the onset and development of non-communicable diseases., Objective: The aim of this study is to examine the relationship between ART and markers of systemic inflammation in HIV/AIDS patients at an urban antiretroviral clinic in Ghana., Methods: We examined serum levels of high sensitivity CRP (hsCRP), interleukin-6 (IL-6), interleukin- 18(IL-18), and tumor necrosis factor-α (sTNFR1 and sTNFR2) from 40 HIV infected patients. Kruskal-Wallis Test was used to examine the differences in markers of systemic inflammation according to the types of ART medication taken. We then utilized generalized additive models (GAM) with non-linear function to examine the association between ART and markers of systemic inflammation after adjusting for potential confounders., Results: Overall, 30 (75.0%) of the participants received ART and 35 (85%) were female. Kruskal- Wallis Test revealed no significant differences in the markers of systemic inflammation among the three categories of ART (none, AZT, 3TC, EFV/NVP, and TDF, 3TC/FTC, EFV/NVP). In the multivariable- adjusted GAM model, we found a significant but non-linear association between time since diagnosis and CRP levels (p=0.006)., Conclusion: Although the relatively small sample size limits the scope of the study's findings, these results suggest that individuals on ART need to be screened periodically for the development of chronic conditions. This line of investigation has the potential to influence treatment and clinical guidelines that will improve the quality of care for HIV-infected patients., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
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- 2020
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17. Significant Induction of Soluble TNFR2 Compared with TNFR1 in Serum Samples of HIV Patients with or without Antiretroviral Medication.
- Author
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Sarfo B, Haile ZT, Deletsu S, Mensah EA, and Bonney EY
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- Adult, Cross-Sectional Studies, Female, Ghana, HIV Infections blood, HIV Infections epidemiology, Humans, Male, Middle Aged, Receptors, Tumor Necrosis Factor, Type I genetics, Receptors, Tumor Necrosis Factor, Type II genetics, Solubility, Anti-HIV Agents therapeutic use, HIV Infections drug therapy, Receptors, Tumor Necrosis Factor, Type I blood, Receptors, Tumor Necrosis Factor, Type II blood
- Abstract
Background: Tumor necrosis factor and its receptors (sTNFR1 and sTNFR2) have been implicated in many infectious diseases. Identification of the key receptor (sTNFR1 or sTNFR2) which drives the immunopathogenesis of HIV infection is crucial in developing adjunctive therapy for HIV., Objective: This study determined the expression levels of sTNFR1 and sTNFR2 in antiretroviral therapy (ART) - experienced and naïve HIV patients., Methods: A total of 40 HIV patients comprising 30 with ART and 10 without ART were enrolled from the Pantang Hospital located in the Greater Accra Region of Ghana for data and blood collection. Serum concentrations of sTNFR1 and sTNFR2 were determined by ELISA. Mann- Whitney U test was used to examine differences in serum levels of sTNFR1 and sTNFR2 between patients on ART and ART naïve patients. Wilcoxon Signed-Rank test was performed to determine the difference between sTNFR1 and sTNFR2, and Kruskal Wallis test was conducted to compare the effect of different antiretroviral drugs on the levels of sTNFR1 and sTNFR2. P< 0.05 was considered statistically significant., Results: A Wilcoxon Signed-Ranks Test indicated serum levels of sTNFR2 was statistically significantly higher than sTNFR1 (Z=-5.51; p<0.001). Levels of sTNFR1 and sTNFR2 did not differ by ART status U =91.00 (Z = -1.84), p = 0.065 and U = 131.50 (Z = -0.58, p =0.560), respectively. There were not significant differences in levels of TNFR2 H(2) = 1.86, p=0.395 and sTNFR1 (H (2) = 4.37, p=0.113 across different ART combinations., Conclusion: Compared to sTNFR1, the level of sTNFR2 is significantly increased during HIV infection irrespective of ART status. The high sTNFR2 level is not associated with antiretroviral drugs and may be another potential target for therapeutic development. This is the first study of sTNFRs in African population., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2020
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18. Symptoms of Toxicity and Plasma Cytochrome c Levels in Human Immunodeficiency Virus-infected Patients Receiving Anti-retroviral Therapy in Ghana: A Cross-sectional Study.
- Author
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Mensah EA, Sarfo B, Bonney EY, Parbie PK, and Ocloo A
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- Adult, Cross-Sectional Studies, Drug-Related Side Effects and Adverse Reactions blood, Female, Ghana epidemiology, HIV Infections blood, Humans, Hyperlipidemias blood, Hyperlipidemias chemically induced, Hyperlipidemias epidemiology, Male, Middle Aged, Muscular Diseases blood, Muscular Diseases chemically induced, Muscular Diseases epidemiology, Pancreatitis blood, Pancreatitis chemically induced, Pancreatitis epidemiology, Young Adult, Antiretroviral Therapy, Highly Active adverse effects, Cytochromes c blood, Drug-Related Side Effects and Adverse Reactions epidemiology, HIV Infections drug therapy
- Abstract
Background: Side effects and toxicity have posed a threat to the positive contribution of Antiretroviral Therapy (ART) in the management of human immunodeficiency virus (HIV) infection and Acquired Immune Deficiency Syndrome (AIDS). Symptoms of mitochondrial toxicity including myopathy, pancreatitis, hyperlipidaemia and lactic acidosis are found among HIVinfected patients on ART. To date, there is not a reliable biomarker for monitoring ART-related mitochondrial toxicity. Plasma level of Cytochrome c (Cyt-c) has been proposed as a potential biomarker for ART-related toxicity due to its strong association with apoptosis., Objective: The present study assessed toxicity and level of plasma Cyt-c among HIV-infected patients receiving ART in Ghana., Methods: A total of eighty (80) HIV patients were recruited into the study. Demographic data were obtained from personal interview and medical records. Plasma samples were screened for toxicity from sixty (60) participants due to limited resources, and plasma Cyt-c levels were determined using ELISA. Data were analyzed using Stata version 13., Results: Out of the 60 participants, 11 (18.3%) were found with symptoms of myopathy, 12 (20%) with pancreatitis, 21 (35%) with hyperlipidaemia and 36 (60%) with at least one of the symptoms. The concentration of plasma Cyt-c was higher (0.122 ng/ml) in patients with toxicity than in those without toxicity (0.05 ng/ml), though the difference was not statistically significant (p = 0.148). There was a weak correlation between plasma Cyt-c level and duration of ART (Spearman rho = 0.02, p = 0.89)., Conclusion: This study, therefore, demonstrated a high prevalence of ART-related toxicity and high levels of Cyt-c in HIV-infected patients in support of the argument that plasma Cyt-c levels are potential biomarkers for determining ART-related toxicity in HIV patients., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2020
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19. The Association of Black Cardiologists (ABC) Cardiovascular Implementation Study (CVIS): A Research Registry Integrating Social Determinants to Support Care for Underserved Patients.
- Author
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Ofili EO, Schanberg LE, Hutchinson B, Sogade F, Fergus I, Duncan P, Hargrove J, Artis A, Onyekwere O, Batchelor W, Williams M, Oduwole A, Onwuanyi A, Ojutalayo F, Cross JA, Seto TB, Okafor H, Pemu P, Immergluck L, Foreman M, Mensah EA, Quarshie A, Mubasher M, Baker A, Ngare A, Dent A, Malouhi M, Tchounwou P, Lee J, Hayes T, Abdelrahim M, Sarpong D, Fernandez-Repollet E, Sodeke SO, Hernandez A, Thomas K, Dennos A, Smith D, Gbadebo D, Ajuluchikwu J, Kong BW, McCollough C, Weiler SR, Natter MD, Mandl KD, and Murphy S
- Subjects
- Georgia, Humans, Prospective Studies, Registries, Black or African American statistics & numerical data, Social Determinants of Health statistics & numerical data, Vulnerable Populations statistics & numerical data
- Abstract
African Americans, other minorities and underserved populations are consistently under- represented in clinical trials. Such underrepresentation results in a gap in the evidence base, and health disparities. The ABC Cardiovascular Implementation Study (CVIS) is a comprehensive prospective cohort registry that integrates social determinants of health. ABC CVIS uses real world clinical practice data to address critical gaps in care by facilitating robust participation of African Americans and other minorities in clinical trials. ABC CVIS will include diverse patients from collaborating ABC member private practices, as well as patients from academic health centers and Federally Qualified Health Centers (FQHCs). This paper describes the rationale and design of the ABC CVIS Registry. The registry will: (1) prospectively collect socio-demographic, clinical and biospecimen data from enrolled adults, adolescents and children with prioritized cardiovascular diseases; (2) Evaluate the safety and clinical outcomes of new therapeutic agents, including post marketing surveillance and pharmacovigilance; (3) Support National Institutes of Health (NIH) and industry sponsored research; (4) Support Quality Measures standards from the Center for Medicare and Medicaid Services (CMS) and Commercial Health Plans. The registry will utilize novel data and technology tools to facilitate mobile health technology application programming interface (API) to health system or practice electronic health records (EHR). Long term, CVIS will become the most comprehensive patient registry for underserved diverse patients with cardiovascular disease (CVD) and co morbid conditions, providing real world data to address health disparities. At least 10,000 patients will be enrolled from 50 sites across the United States.
- Published
- 2019
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20. Global Health Security Agenda Implementation: A Case for Community Engagement.
- Author
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Armstrong-Mensah EA and Ndiaye SM
- Subjects
- Emergencies, Epidemiological Monitoring, Global Health, Humans, International Cooperation, Communicable Disease Control organization & administration, Community Participation methods, Disease Outbreaks prevention & control
- Abstract
In today's interconnected world, infectious diseases can spread rapidly within and between countries. The 2014-2016 Ebola epidemic in Guinea, Liberia, and Sierra Leone underscored the inability of countries with limited capacities and weak public health systems to respond effectively to outbreaks. To mitigate future health threats, nations and international organizations launched the Global Health Security Agenda (GHSA) to accelerate compliance with the WHO's International Health Regulations, so as to enhance global protection from infectious disease threats. To advance GHSA's mandate to build capacity to prevent, detect, and respond to infectious diseases, and thereby contain threats at their source, community engagement is needed. This article advocates for community engagement in GHSA implementation, using examples from 3 GHSA action packages. A country's ability to prevent a local disease outbreak from becoming an epidemic often rests with the level of knowledge about the situation and the actions taken at the community level.
- Published
- 2018
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21. DEMOCRATIZING DISCOVERY HEALTH WITH N=Me.
- Author
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Ofili EO, Pemu PE, Quarshie A, Mensah EA, Rollins L, Ojutalayo F, McCaslin A, and Clair BS
- Subjects
- Aged, Biomarkers blood, Blood Glucose metabolism, Blood Pressure, Community Health Services, Counseling, Decision Support Techniques, Diabetes Mellitus blood, Diabetes Mellitus physiopathology, Diabetes Mellitus psychology, Exercise, Female, Georgia, Health Behavior, Health Knowledge, Attitudes, Practice, Humans, Male, Middle Aged, Patient Education as Topic, Patient Participation, Primary Health Care, Treatment Outcome, Diabetes Mellitus therapy, Mobile Applications, Patient-Centered Care methods, Self Care methods, Telemedicine methods
- Abstract
Health 360x is a mobile health application and social platform that integrates self-monitoring and decision support for preventive health. We studied 240 diabetic patients in primary care practices and a church community in metropolitan Atlanta. Health coaches were trained on the Health 360x curriculum, which was adapted from the American Association of Diabetes Educators. Participants worked with the health coaches to set goals for diabetes self-management. The intervention included weekly coaching for 12 weeks and online peer networking. Outcome variables included blood pressure, physical activity, and blood glucose that showed significant improvement at 12 weeks and 12 months compared to baseline. Focus group testing revealed that references for empowerment and engagement were associated with positive clinical outcomes. Barriers to adoption and use of the technology were inability to use the internet and concern about privacy and security of health data. Future efforts will integrate a multidisciplinary training dashboard with considerable attention to education on security features including data encryption and sign-on verification., Competing Interests: Potential Conflicts of Interest: Dr. Ofili is the lead Inventor of the patented technology that supports Health 360x. She is also the Founder and Chief Scientific Officer of AccuHealth Technologies Inc., a Morehouse School of Medicine Technology Transfer Faculty Start Up.
- Published
- 2018
22. Lifestyle Modification Experiences of African American Breast Cancer Survivors: A Needs Assessment.
- Author
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Smith SA, Claridy MD, Whitehead MS, Sheats JQ, Yoo W, Alema-Mensah EA, Ansa BE, and Coughlin SS
- Abstract
Background: Little is known about the rates of obesity among African American (AA) breast cancer survivors (BCSs), the availability and use of lifestyle modification methods suitable for this population, and the impact of changes in dietary intake and physical activity on health-related quality of life (HR-QoL)., Objective: The objectives of the study were to describe obesity rates, dietary intake, and physical activity as lifestyle modification strategies; examine predictors of engagement in these strategies post diagnosis; and learn more about salient features of lifestyle interventions from AA BCSs participating in a breast cancer support group., Methods: The needs assessment included four components: (1) a literature review to determine existing lifestyle modification strategies of AA BCSs; (2) secondary data analysis of the 2010 National Health Interview Survey, Cancer Control Supplement to examine HR-QoL; (3) administration, to 200 AA BCSs, of an assessment tool relating to weight and breast cancer history, dietary intake, and physical activity through a variety of approaches (eg, Internet, mail, in-person, and telephone); and (4) focus group discussions to frame lifestyle interventions., Results: Preliminary findings indicate that AA BCSs are underrepresented in lifestyle intervention research, have disparities in HR-QoL outcomes, do not meet current cancer prevention guidelines, and have recommendations for effective strategies for lifestyle modification., Conclusions: As analyses of the needs assessment are completed, the research team is partnering with community coalitions and breast cancer support groups in Miami, Chicago, Houston, Los Angeles, and Philadelphia to develop community-engaged intervention approaches for promoting adherence to cancer prevention guidelines.
- Published
- 2015
- Full Text
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23. Stereoselective α-glycosylation of C(6)-hydroxyl myo-inositols via nickel catalysis-application to the synthesis of GPI anchor pseudo-oligosaccharides.
- Author
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McConnell MS, Mensah EA, and Nguyen HM
- Subjects
- Catalysis, Glycosylation, Glycosylphosphatidylinositols chemistry, Inositol analogs & derivatives, Molecular Conformation, Oligosaccharides chemistry, Stereoisomerism, Glycosylphosphatidylinositols chemical synthesis, Inositol chemistry, Nickel chemistry, Oligosaccharides chemical synthesis, Organometallic Compounds chemistry
- Abstract
Glycosylphosphatidyl inositol (GPI) anchors play a key role in many eukaryotic biological pathways. Stereoselective synthesis of GPI anchor analogues have proven to be critical for probing the biosynthesis, structure, and biological properties of these compounds. Challenges that have emerged from these efforts include the preparation of the selectively protected myo-inositol building blocks and the stereoselective construction of glucosamine α-linked myo-inositol containing pseudodisaccharide units. Herein, we describe the effectiveness of the cationic nickel(II) catalyst, Ni(4-F-PhCN)4(OTf)2, at promoting selective formation of 1,2-cis-2-amino glycosidic bonds between the C(2)-N-substituted benzylideneamino trihaloacetimidate donors and C(6)-hydroxyl myo-inositol acceptors. This catalytic coupling process allows rapid access to pseudosaccharides of GPI anchors in good yields and with excellent levels of α-selectivity (α:β=10:1-20:1). In stark contrast, activation of trichloroacetimidate donors containing the C(2)-N-substituted benzylidene group with TMSOTf and BF3(.)OEt2 provided the desired pseudodisaccharides as a 1:1 mixture of α- and β-isomers., (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Published
- 2013
- Full Text
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24. Nickel-catalyzed stereoselective glycosylation with C(2)-N-substituted benzylidene D-glucosamine and galactosamine trichloroacetimidates for the formation of 1,2-cis-2-amino glycosides. Applications to the synthesis of heparin disaccharides, GPI anchor pseudodisaccharides, and α-GalNAc.
- Author
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Mensah EA, Yu F, and Nguyen HM
- Subjects
- Catalysis, Glycosylation, Acetylgalactosamine chemical synthesis, Benzylidene Compounds chemistry, Galactosamine chemistry, Glucosamine chemistry, Glycosylphosphatidylinositols chemistry, Heparin chemical synthesis, Nickel chemistry
- Abstract
The 1,2-cis-2-amino glycosides are key components found within a variety of biologically important oligosaccharides and glycopeptides. Although there are remarkable advances in the synthesis of 1,2-cis-2-amino glycosides, disadvantages of the current state-of-the-art methods include limited substrate scope, low yields, long reaction times, and anomeric mixtures. We have developed a novel method for the synthesis of 1,2-cis-2-amino glycosides via nickel-catalyzed α-selective glycosylation with C(2)-N-substituted benzylidene D-glucosamine and galactosamine trichloroacetimidates. These glycosyl donors are capable of coupling to a wide variety of alcohols to provide glycoconjugates in high yields with excellent levels of α-selectivity. Additionally, only a substoichiometric amount of nickel (5-10 mol %) is required for the reaction to occur at 25 °C. The current nickel method relies on the nature of the nickel-ligand complex to control the α-selectivity. The reactive sites of the nucleophiles or the nature of the protecting groups have little effect on the α-selectivity. This methodology has also been successfully applied to both disaccharide donors and acceptors to provide the corresponding oligosaccharides in high yields and α-selectivity. The efficacy of the nickel procedure has been further applied toward the preparation of heparin disaccharides, GPI anchor pseudodisaccharides, and α-GluNAc/GalNAc. Mechanistic studies suggest that the presence of the substituted benzylidene functionality at the C(2)-amino position of glycosyl donors is crucial for the high α-selectivity observed in the coupling products. Additionally, the α-orientation of the C(1)-trichloroacetimidate group on glycosyl donors is necessary for the coupling process to occur.
- Published
- 2010
- Full Text
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25. Comparison of zwitterionic N-alkylaminomethanesulfonic acids to related compounds in the Good buffer series.
- Author
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Long RD, Hilliard NP, Chhatre SA, Timofeeva TV, Yakovenko AA, Dei DK, and Mensah EA
- Abstract
Several N-alkyl and N,N-dialkylaminomethanesulfonic acids were synthesized (as zwitterions and/or sodium salts) to be tested for utility as biological buffers at lower pH levels than existing Good buffer compounds (aminoalkanesulfonates with a minimum of two carbons between amine and sulfonic acid groups as originally described by Norman Good, and in common use as biological buffers). Our hypothesis was that a shorter carbon chain (one carbon) between the amino and sulfonic acid groups should lower the ammonium ion pK(a) values. The alkylaminomethanesulfonate compounds were synthesized in aqueous solution by reaction of primary or secondary amines with formaldehyde/sodium hydrogensulfite addition compound. The pK(a) values of the ammonium ions of this series of compounds (compared to existing Good buffers) was found to correlate well with the length of the carbon chain between the amino and sulfonate moeties, with a significant decrease in amine basicity in the aminomethanesulfonate compounds (pK(a) decrease of 2 units or more compared to existing Good buffers). An exception was found for the 2-hydroxypiperazine series which shows only a small pK(a) decrease, probably due to the site of protonation in this compound (as confirmed by X-ray crystal structure). X-ray crystallographic structures of two members of the series are reported. Several of these compounds have pK(a) values that would indicate potential utility for buffering at pH levels below the normal physiological range (pK(a) values in the range of 3 to 6 without aqueous solubility problems) - a range that is problematic for currently available Good buffers. Unfortunately, the alkylaminomethanesulfonates were found to degrade (with loss of their buffering ability) at pH levels below the pK(a) value and were unstable at elevated temperature (as when autoclaving) - thus limiting their utility.
- Published
- 2010
- Full Text
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26. Nickel-catalyzed stereoselective formation of alpha-2-deoxy-2-amino glycosides.
- Author
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Mensah EA and Nguyen HM
- Subjects
- Aminoglycosides chemistry, Catalysis, Galactosamine chemical synthesis, Galactosamine chemistry, Glucosamine chemical synthesis, Glucosamine chemistry, Glycoconjugates chemistry, Glycosylation, Stereoisomerism, Aminoglycosides chemical synthesis, Glycoconjugates chemical synthesis, Nickel chemistry
- Abstract
The development of a new method for the stereoselective synthesis of alpha-2-deoxy-2-amino glycosides is described. This methodology relies on the nature of the cationic nickel catalyst, generated in situ from L(n)NiCl(2) and AgOTf, to direct the anomeric stereoselectivity. The new glycosylation reaction is highly alpha-selective and proceeds under mild conditions with 5-10 mol % of the nickel catalyst loading at ambient temperature. This new method has been applied to both D-glucosamine and galactosamine trichloroacetimidate donors as well as an array of primary, secondary, and tertiary alcohol nucleophiles to provide the desired glycoconjugates in good yields with excellent alpha-selectivity. Mechanistic studies of the present reaction are underway and will be reported in due course.
- Published
- 2009
- Full Text
- View/download PDF
27. Palladium-controlled beta-selective glycosylation in the absence of the C(2)-ester participatory group.
- Author
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Mensah EA, Azzarelli JM, and Nguyen HM
- Abstract
The development of a new glycosylation method for the stereoselective synthesis of beta-glycosides in the absence of the traditional C(2)-ester neighboring group effect is described. This process relies on the ability of the cationic palladium catalyst, Pd(PhCN)(2)(OTf)(2) generated in situ from Pd(PhCN)(2)Cl(2) and AgOTf, to direct beta-selectivity. The new glycosylation reaction is highly beta-selective and proceeds under mild conditions with 1-2 mol % of catalyst loading. This beta-glycosylation method has been applied to a number of glucose donors with benzyl, allyl, and p-methoxybenzyl groups incorporated at the C(2)-position as well as tribenzylated xylose and quinovose donors to prepare various disaccharides and trisaccharides with good to excellent beta-selectivity. Mechanistic studies suggest that the major operative pathway is likely to proceed via a seven-membered ring intermediate, wherein the cationic palladium complex coordinates to both the C(1)-imidate nitrogen and C(2)-oxygen of the trichloroacetimidate donor. Formation of this seven-membered ring intermediate directs the selectivity, leading to the formation of beta-glycosides.
- Published
- 2009
- Full Text
- View/download PDF
28. Cationic palladium(II)-catalyzed stereoselective glycosylation with glycosyl trichloroacetimidates.
- Author
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Yang J, Cooper-Vanosdell C, Mensah EA, and Nguyen HM
- Abstract
The development of a new method for stereoselective glycosylation with glycosyl trichloroacetimidate donors employing cationic palladium(II), Pd(CH(3)CN)(4)(BF(4))(2), is described. This process employs Pd(CH(3)CN)(4)(BF(4))(2) as an efficient activator, providing access to a variety of disaccharides and glycopeptides. This reaction is highly stereoselective and proceeds under mild conditions with low catalyst loading. Interestingly, this palladium catalysis directs beta-glucosylations in the absence of classical neighboring group participation.
- Published
- 2008
- Full Text
- View/download PDF
29. Distribution of alveolar type II cells in neonatal and adult rat lung revealed by RT-PCR in situ.
- Author
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Mensah EA, Kumar NM, Nielsen L, and Lwebuga-Mukasa JS
- Subjects
- Animals, Animals, Newborn, Base Sequence, Blotting, Northern, In Situ Hybridization, Molecular Probes genetics, Molecular Sequence Data, Polymerase Chain Reaction, Rats, Rats, Sprague-Dawley, Transcription, Genetic, Aging physiology, Pulmonary Alveoli cytology
- Abstract
Type II pneumocytes in newborn lungs are more uniformly distributed, whereas in adult lungs they are located at alveolar corners. We used morphometry and reverse transcription-polymerase chain reaction in situ hybridization of surfactant protein C mRNA to determine the patterns of type II cell distribution in random lung sections from Sprague-Dawley rats at various neonatal stages and adults. There was a progressive increase in the percentage of type II cells at alveolar corners from 30% at 1 day to 51, 62, 78, and 81% at 3, 5, and 7 days old and adult rats, respectively. There were statistically significant differences (P < 0.001) in the localization of type II cells from the nearest alveolar corner in the 1-day-old compared with 7-day-old and adult rat lungs. These results show that rat type II cells localize to the alveolar corners within the first 7 days postnatally and provide a system for study of factors that regulate alveolar epithelial cell distribution.
- Published
- 1996
- Full Text
- View/download PDF
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