129 results on '"Katherine Campbell"'
Search Results
2. Developing a Physician-Led Model for Research Mentorship in Academic Urology
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Marco-Jose Rivero, Farah Rahman, Katherine Campbell, Braian Rene Ledesma, and Ranjith Ramasamy
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Urology ,General Medicine - Published
- 2023
3. Ann Hopkins and PwC: Critically Analyzing Culture, Leadership, Policies, and Reporting for Diversity and Inclusion
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Katherine Campbell and Duane Helleloid
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Accounting ,Education - Abstract
Large public accounting firms are currently prioritizing diversity and inclusion and making commitments to increased transparency by publishing diversity, equity, and inclusion reports. This case explores PwC’s self-described diversity and inclusion journey by juxtaposing the firm’s first publicly released diversity and inclusion report with the decades-earlier experience of Ann Hopkins, who became a partner as the result of a landmark Supreme Court case. This approach provides a longitudinal perspective on diversity and inclusion and facilitates analysis of the roles of organizational policies/procedures, organizational culture, and leadership in creating a more inclusive organization. The case presents an opportunity to analyze PwC’s published diversity data and explore the challenges firms face when trying to increase diversity and develop an inclusive culture.
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- 2023
4. Whole Exome Sequencing Identifies a Rare CFTR Mutation in Brothers With Anomalies of the Vas Deferens: A Case Study
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Katherine Campbell, Alexandra Dullea, Kyle Schuppe, Armin Ghomeshi, Christian Ramsoomair, Anthony J. Griswold, Kajal Khodamoradi, and Ranjith Ramasamy
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Urology - Published
- 2023
5. Future of Male Infertility Evaluation and Treatment: Brief Review of Emerging Technology
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Parris Diaz, Alexandra Dullea, Kevin Y. Chu, John Zizzo, Justin Loloi, Rohit Reddy, Katherine Campbell, Philip S. Li, and Ranjith Ramasamy
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Male ,Technology ,Sperm Retrieval ,Artificial Intelligence ,Semen ,Urology ,Testis ,Humans ,Spermatozoa ,Infertility, Male ,Azoospermia - Abstract
Over the past few decades, there have been significant advances in male infertility, particularly in the development of novel diagnostic tools. Unfortunately, there remains a substantial number of patients that remain infertile despite these improvements. In this review, we take heed of the emerging technologies that will shape the future of male infertility diagnosis, evaluation, and treatment. Improvement in computer-assisted semen analyses and portability allow males to obtain basic semen parameters from the comfort of their home. Additionally, breakthrough ultrasound technology allows for preoperative prediction of potential areas of spermatogenesis within the testes, high-resolution optics permits better visualization during microdissection testicular sperm extraction (mTESE), and artificial intelligence improves sperm selection and identification.
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- 2022
6. MP21-14 INCREASING HEALTH EQUITY THROUGH VOTER REGISTRATION IN OUTPATIENT CLINICS; THE ACTION PROJECT
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Farah Rahman, Katherine Campbell, and Ranjith Ramasamy
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Urology - Published
- 2023
7. MP43-06 TESTOSTERONE THERAPY IN MEN WITH KLINEFELTER SYNDROME: ANALYSIS OF A GLOBAL FEDERATED RESEARCH NETWORK
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Katherine Campbell, Justin Loloi, Chase Carto, and Ranjith Ramasamy
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Urology - Published
- 2023
8. MP01-07 A NEXT-GENERATION SEQUENCING ANALYSIS OF THE SEMEN MICROBIOME IN MEN WITH NON-OBSTRUCTIVE AZOOSPERMIA
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Katherine Campbell, Farah Rahman, Camila Suarez, Aaron Miller, Emad Ibrahim, Scott D. Lundy, and Ranjith Ramasamy
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Urology - Published
- 2023
9. MP27-05 ANDROGEN RECEPTOR SIGNALING IN THE HUMAN PENIS IS SIMILAR REGARDLESS OF SERUM TESTOSTERONE LEVEL
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Katherine Campbell, Alexandra Dullea, Braian Ledesma, Kajal Khodamoradi, Himanshu Arora, and Ranjith Ramasamy
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Urology - Published
- 2023
10. Supplementary Figure 6 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 1066KB, MEK inhibition alone and combination PI3K + MEK inhibition decreases serotonin secretion, while BEZ235 decreases CgA expression. (A) BON and (B) QGP-1 cells were plated in 24 well plates at a density of 1x105 cells/cm2. After 24h, cells were washed and maintained with serum-free medium. Cells were subsequently treated with either (upper panels) control, BKM120 (5 �M), PD0325901 (100 nM), or combination BKM120 + PD0325901 (5 �M/100 nM), or (lower panels) control, BEZ235 (1000 nM), PD0325901 (100 nM), or combination BEZ235 + PD0325901 (1000 nM/100 nM) for 1h. Media was collected and serotonin measured by serotonin ELISA (* p < 0.05 vs. control). (C) Whole cell lysates were collected following 24h of drug treatment with either control, BKM120 (5 �M), PD0325901 (100 nM), or combination BKM120 + PD0325901 (5 �M/100 nM), or control, BEZ235 (1000 nM), PD0325901 (100 nM), or combination BEZ235 + PD0325901 (1000 nM/100 nM) and analyzed for CgA expression. β-actin was used as a loading control.
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- 2023
11. Supplementary Figure 4 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 649KB, Combination PI3K and MEK inhibitor treatment results in a more pronounced decrease in NCI-H727 and QGP-1 cell proliferation. (A) NCI-H727 and (B) QGP-1 cells were plated in 24 well plates at a density of 3x104 cells/well. Treatments were initiated the following morning with either control, BKM120 (5 μM), PD0325901 (100 nM), or combination BKM120 + PD0325901 (5 μM/100 nM) (upper panels), or control, BEZ235 (1000 nM), PD0325901 (100 nM), or combination BEZ235 + PD0325901 (1000 nM/100 nM) (lower panels). Media was exchanged for fresh drug media at 36h. Proliferation was assessed directly by cell counting at 72h (* p < 0.05 vs. control; � p < 0.05 vs. monotherapy).
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- 2023
12. Supplementary Figure 2 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 812 KB, PI3K inhibition decreases cell proliferation in NCI-H727 and QGP-1 cell lines. (A) NCI-H727 and (B) QGP-1 cells were plated in 24 well plates at a density of 3x104 cells/well. Treatments were initiated the following morning with increasing doses of either BKM120 (0-5 μM) (upper panels) or BEZ235 (0-1000 nM) (lower panels). Media was exchanged for fresh drug media again at 36h. Proliferation was assessed directly by cell counting at 72h (* p < 0.05 vs. control). (C) BON cells transfected with shRNA directed against the alpha subunit of PI3K were plated in 24 well plates at a density of 3x104 cells/well and proliferation assessed at 24h intervals up to 96h.
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- 2023
13. Supplementary Figure 3 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 741KB, PI3K inhibition enhances apoptosis in NCI-H727 and QGP-1 cell lines. (A) NCI-H727 and (B) QGP-1 cells were plated in 24 well plates at a density of 5x104 cells/cm2. Treatments were initiated the following morning with increasing doses of either BKM120 (0-5 μM) (upper panels) or BEZ235 (0-1000 nM) (lower panels) and continued for 24h. Apoptosis was measured by DNA fragmentation using the Cell Death Detection ELISAplus (* p < 0.05 vs. control).
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- 2023
14. Data from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
Background: The precise involvement of the PI3K/mTOR and RAS/MEK pathways in carcinoid tumors is not well defined. Therefore, the purpose of our study was to evaluate the role these pathways play in carcinoid cell proliferation, apoptosis, and secretion and to determine the effects of combined treatment on carcinoid tumor inhibition.Methods: The human neuroendocrine cell lines BON (pancreatic carcinoid), NCI-H727 (lung carcinoid), and QGP-1 (somatostatinoma) were treated with either the pan-PI3K inhibitor, BKM120, or the dual PI3K–mTOR inhibitor, BEZ235, alone or in combination with the MEK inhibitor, PD0325901; proliferation, apoptosis, and protein expression were assessed. Peptide secretion was evaluated in BON and QGP-1 cells. The antiproliferative effect of BEZ235, alone or combined with PD0325901, was then tested in vivo.Results: Both BKM120 and BEZ235 decreased proliferation and increased apoptosis; combination with PD0325901 significantly enhanced the antineoplastic effects of either treatment alone. In contrast, neurotensin peptide secretion was markedly stimulated with BKM120 treatment, but not BEZ235. The combination of BEZ235 + PD0325901 significantly inhibited the growth of BON xenografts without systemic toxicity.Conclusions: Both BKM120 and BEZ235 effectively inhibited neuroendocrine tumor (NET) cell proliferation and stimulated apoptosis. However, inhibition of the PI3K pathway alone with BKM120 significantly stimulated neurotensin peptide secretion; this did not occur with the dual inhibition of both PI3K and mTOR using BEZ235 suggesting that this would be a more effective treatment regimen for NETs. Moreover, the combination of BEZ235 and the MEK inhibitor PD0325901 was a safe and more effective therapy in vivo compared with single agents alone. Clin Cancer Res; 20(5); 1212–22. ©2014 AACR.
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- 2023
15. Supplementary Figure 5 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 1080KB, Combination PI3K + MEK inhibition enhances apoptosis compared to monotherapy. (A) NCI-H727 and (B) QGP-1 cells were plated in 24 well plates at a density of 5x104 cells/cm2. Treatments were initiated the following morning with either control, BKM120 (5 μM), PD0325901 (100 nM), or combination BKM120 + PD0325901 (5 μM/100 nM) (upper panels), or control, BEZ235 (1000 nM), PD0325901 (100 nM), or combination BEZ235 + PD0325901 (1000 nM/100 nM) (lower panels) and continued for 24 hours. Apoptosis was measured by DNA fragmentation using the Cell Death Detection ELISAplus (* p < 0.05 vs. control; � p < 0.05 vs. monotherapy). (C) BON cells were plated in 6 well plates at 9 x 105 cells/well. After 24h of treatment, cells were collected, stained with annexin V Alexa Fluor 488, and analyzed by flow cytometry (* p < 0.05 vs. control; � p < 0.05 vs. monotherapy).
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- 2023
16. Supplementary Figure 1 from Cotargeting the PI3K and RAS Pathways for the Treatment of Neuroendocrine Tumors
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B. Mark Evers, Courtney M. Townsend, Lowell Anthony, Jun Song, Chi Wang, Heidi Weiss, Katherine Campbell, Jennifer W. Harris, Ji Tae Kim, Victoria A. Elliott, W. Conan Mustain, Yekaterina Y. Zaytseva, Jing Li, and Joseph D. Valentino
- Abstract
PDF file - 1864KB, mTOR inhibition decreases proliferation but does not increase apoptosis or enhance effect in combination with a MEK inhibitor. (A) BON, (B) NCI-H727 and (C) QGP-1 cells were plated in 24 well plates at a density of 3x104 cells/well. Treatments were initiated the following morning with either control, rapamycin (20 nM), PIK-75 (1 μM), PD98059 (10 μM), rapaymycin + PD98059 (20 nM/10 μM), or PIK-75 + PD98059 (1 μM /10 μM). Proliferation (upper panels) was assessed directly by cell counting at 72h (* p < 0.05 vs. control; � p < 0.05 vs. monotherapy). Apoptosis (middle panels) was measured by DNA fragmentation using the Cell Death Detection ELISAplus (* p < 0.05 vs. control; � p < 0.05 vs. monotherapy). For Western blot analysis (lower panels), cells were plated in 6 well plates at a density of 5 x104 cells/cm2. Whole cell lysates were collected following 24h of drug treatment. β-actin was used as a loading control.
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- 2023
17. Abstract 17: Using Mobile Phone Location Data to Estimate the Association of Daytime Racial and Economic Segregation With Hypertensive Disorders of Pregnancy in Metro Atlanta
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Katherine Campbell, Meredith Dixon, Courtney Victor, and Michael Kramer
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Physiology (medical) ,Cardiology and Cardiovascular Medicine - Abstract
Background: Hypertensive disorders of pregnancy (HDPs) are a group of conditions that contribute to maternal morbidity and mortality, disproportionately affecting minority and low-income individuals. Complications from these HDPs may result in poor outcomes for mother and child during pregnancy or post-pregnancy. Disparities in HDPs may be associated with concentrated racial and income inequality in an individual’s activity space, such that the social exposure of places is not only formed by residence but also by daily mobility of the population at large. A novel aspect of women’s residential neighborhood environment can be explored by measuring daytime population mixing. Mobile phone data can be used to estimate social mixing during the daytime for income and racial/ethnic groups by describing the undercurrents of population mobility in neighborhoods. Objective: To estimate the association of daytime racial and income segregation with HDPs among women who gave birth from 2018 to 2019 in metro Atlanta. Methods: Data for women who gave birth in Metro Atlanta in 2018 and 2019 were abstracted from vital statistics records to determine HDP diagnosis and maternal residence by census tract. HDPs were grouped into pre-pregnancy hypertension, gestational hypertension, and eclampsia. Mobile phone location data from CUEBIQ were used to estimate median household income density in each census tract and racial/ethnic density, as a function of where devices moved between the hours of 7am and 10pm. Racial and economic composition of the device was assigned by the user’s estimated home census tract. The Index of Concentration at Extremes (ICE) was calculated as the mixing of mobile devices in each census tract, by race and income. Tracts were categorized as concentrated disadvantage for an ICE score less than -0.3 and concentrated privileged for an ICE score greater than 0.3. Logistic regression models were used to estimate odds of HDPs in census tracts with micro-segregation and income inequality during the daytime, compared to not at extremes. Results: There were 122,482 births included in the maternal cohort, and 8.1% of births occurred among women with a diagnosed HDP. Black women had a higher rate of HDPs compared to White women (9.7% versus 6.9%). Census tracts with higher daytime micro-segregation were associated with higher odds of HDPs compared to tracts not in the extremes (OR = 1.42; 95% CI= 1.35, 1.49). Census tracts with higher daytime income inequality were also associated with higher odds of HDPs (1.26;1.20, 1.33). Conclusions: The odds of maternal HDPs were higher among women in census tracts with greater racial daytime segregation and more income disparity, compared to tracts that were not identified as extremes. Describing and distinguishing social epidemiologic patterns for HDPs by population mobility may provide a better understanding of the social context of who is most at risk.
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- 2023
18. Nitric oxide and derivatives: Molecular insights and translational opportunities
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Braian Ledesma, Fakiha Firdaus, Maria Silena Mosquera, Katherine Campbell, Farah Rahman, Maria Camila Suarez Arbelaez, and Himanshu Arora
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- 2023
19. Contributors
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Eda Acikgoz, Maurizio Anzini, Maria Camila Suarez Arbelaez, Bhaskar Arora, Himanshu Arora, Zahra Bahadoran, Lorenzo Berra, Mariangela Biava, Benjamin Bonavida, Katherine Campbell, Antolín Cantó, Bastien Cautain, Carla Speroni Ceron, Sara Consalvi, Francisco J. Corpas, Priyadarsi De, José Pérez del Palacio, Aleyna Demir, Caridad Díaz, Gabriel Tavares do Vale, Bijan Safaee Fakhr, Fakiha Firdaus, Asghar Ghasemi, Stefano Gianni, Antonio Giordani, Salvador González-Gordo, Amarjot Kaur Grewal, Julie-Ann Hulin, Khosrow Kashfi, Heena Khan, Manish Kumar, Braian Ledesma, Brayden K. Leyva, Katie Lin, Rosa López-Pedraja, Arduino A. Mangoni, Samuele Maramai, Javier Martínez-González, María Miranda, Parvin Mirmiran, Maria Silena Mosquera, Arindam Mukherjee, Gulperi Oktem, José M. Palma, Paola Patrignani, Soumya Paul, Bruna Pinheiro Pereira, Giovanna Poce, Simone Regina Potje, Farah Rahman, Carmen Ramos, Emanuele Rezoagli, Marta Rodríguez-Ruiz, Antonietta Rossi, Mario Saletti, Amparo Sánchez-Fideli, Thakur Gurjeet Singh, Claudiu T. Supuran, Aysegul Taskiran, Sara Tommasi, Francisca Vicente, and Lashika Weerakoon
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- 2023
20. Risk Factors for Discharge Against Medical Advice at Antepartum Hospitalizations [ID: 1373372]
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Pengfei Guo, Katherine Campbell, Olga Grechukhina, Emily Lee, and Xiao Xu
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Obstetrics and Gynecology - Published
- 2023
21. Political ideology and CEO performance under crisis
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Cullen F. Goenner, Adam R. Smedema, Katherine Campbell, and Matthew Notbohm
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Return on assets ,ComputingMilieux_THECOMPUTINGPROFESSION ,media_common.quotation_subject ,Monetary economics ,General Business, Management and Accounting ,Corporate finance ,Politics ,Basis point ,Loan ,Accounting ,Financial crisis ,Economics ,Quality (business) ,Ideology ,Finance ,media_common - Abstract
Management quality is known to influence depository institution performance, but less understood are the characteristics of managers that influence performance. We empirically examine how the political ideology of a credit union’s CEO influenced decision making and performance during the financial crisis. Our results indicate that the return on assets of credit unions run by conservative CEOs are 22 basis points lower during the crisis relative to liberal CEOs. Returns are shown to be lower as a direct result of credit unions with conservative CEOs applying more conservative accounting practices for loan losses than their counterparts during the crisis, despite similar loan quality.
- Published
- 2021
22. Effect of Radiofrequency Electromagnetic Radiation Emitted by Modern Cellphones on Sperm Motility and Viability: An In Vitro Study
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Kevin Y. Chu, Kajal Khodamoradi, Ruben Blachman-Braun, Alexandra Dullea, Joginder Bidhan, Katherine Campbell, John Zizzo, Joseph Israeli, Mitch Kim, Francis Petrella, Emad Ibrahim, and Ranjith Ramasamy
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Urology - Abstract
Cellphones emit radiofrequency electromagnetic radiation (RF-EMR) for transmission of data for social media communication, web browsing, and music/podcast streaming. Use of Bluetooth ear buds has probably prolonged the time during which cellphones reside in the trouser pockets of men. It has been postulated that RF-EMR increases oxidative stress and induces free radical formation.To investigate the effect of wireless-spectrum (4G, 5G, and WiFi) RF-EMR emitted by modern smartphones on sperm motility and viability and explore whether these effects can be mitigated using a physical barrier or distance.Semen samples were obtained from fertile normozoospermic men aged 25-35 yr. A current-generation smartphone in talk mode was used as the RF-EMR source. A WhatsApp voice call was made using either 4G, 5G, or WiFi wireless connectivity. We determined if exposure effects were mitigated by either a cellphone case or greater distance from the semen sample.The semen samples were analyzed according to 2010 World Health Organization laboratory guidelines. Statistical analysis was performed using SPSS v.28.We observed decreases in sperm motility and viability with WiFi exposure but not with exposure to 4G or 5G RF-EMR. With large variability among smartphones, continued research on exposure effects is needed.Our exploratory study revealed that sperm motility and viability are negatively impacted by smartphones that use the WiFi spectrum for data transmission.We looked at the effect of cellphone use on sperm motility and viability. We found that cellphones using WiFi connectivity for data usage have harmful effects on semen quality in men.
- Published
- 2022
23. Androgen Receptor Signaling is Similar in Human Corpus Cavernosum in Men with Different Serum Testosterone Levels
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Kajal Khodamoradi, Alexandra Dullea, Katherine Campbell, Christian Ramsoomair, Roei Golan, and Ranjith Ramasamy
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Urology - Abstract
Testosterone (T) plays an important role in male reproductive function and tissue development. Normal serum T levels vary between 300 and 1000 ng/dl. It is not known, however, if varying serum T levels alter androgen receptor (AR) signaling in tissue.To measure AR signaling levels in human corpus cavernosal tissue in males with different serum T levels.Participants were selected from a group of males undergoing surgical management for erectile dysfunction (ED; penile prosthesis placement). T levels were measured 1 week before surgery and a sample of corpus cavernosal tissue was procured during surgery. The tissue was homogenized, measured for protein concentration, and used for western blot analysis. VEGF was selected as an AR marker and actin was used for protein normalization.VEGF and actin expression levels were analyzed using western blot analysis and ImageJ was used for quantification of antibody expression.AR signaling was measured in terms of VEGF expression. Above a T level of 200 ng/dl, there was no significant difference found in VEGF expression. Only one patient had a T level less than 200 ng/dl, limiting the generalizability of these results. In addition, all patients had a history of ED, and controls (patients without ED) were not included in the study.Above a serum T level of 200 ng/dl, there was no significant difference in AR signaling. This finding suggests that there could be a saturation level present in corpus cavernosal tissue that is approximately 200 ng/dl.Serum testosterone levels above a certain threshold may not be necessary for biological functions. Instead, it is most likely that there is an approximate serum testosterone level that fully saturates tissue androgen receptors and results in peak function in men.
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- 2022
24. Mutagenic effect of chemotherapy on sperm DNA and implications for family planning
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Ari P. Bernstein, Justin Loloi, Rohit Reddy, Christian Ramsoomair, Katherine Campbell, Francesco Maura, Ola Landgren, Daniel Nassau, Emad Ibrahim, and Ranjith Ramasamy
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Male ,Semen ,Urology ,Family Planning Services ,Humans ,DNA ,Spermatozoa ,Mutagens - Published
- 2022
25. An evaluation of race-based representation among men participating in clinical trials for prostate cancer and erectile dysfunction
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Russell G. Saltzman, Isaac Zucker, Katherine Campbell, Deep A. Gandhi, Kikachukwu Otiono, Alexander Weber, Thomas A. Masterson, and Ranjith Ramasamy
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Pharmacology ,History ,Polymers and Plastics ,General Medicine ,Business and International Management ,Industrial and Manufacturing Engineering - Abstract
Inclusion of ethnic/racial minorities in clinical trials is essential to fully assess therapeutic efficacy. It is well-known that populations respond dissimilarly to interventions. Our objective is to analyze the inclusion of minority men in clinical trials for erectile dysfunction (ED).We searched ClinicalTrials.gov for the disease keyword: "Erectile Dysfunction" and used "Prostate Cancer" for comparison. Completed trials which reported demographic data were included for analysis. Literature was reviewed to determine the prevalence of ED and prostate cancer (PC) among Hispanic, Black, White, and Asian men. The proportion of individuals of each group that participated in trials is divided by the proportion of each group in the disease population to calculate the "Participation to Prevalence Ratio" (PPR). PPRs between 0.8 and 1.2 indicates adequate representation,0.8 is under-representation and1.2 is over-representation.A total of 312 trials were assessed: 289 for prostate cancer and 23 for ED. Hispanic men comprised 11.8% of ED trial participants and 4.6% of prostate cancer trial participants, yet represented 18% of ED patients and 7.3% of PC patients. Black/African-American (AA) men accounted for 10.2% of ED trial participants and 9.4% of PC trial participants, but comprise 16% of ED patients, and 16.3% of PC patients. Hispanic and AA men are under-represented in trials for ED and Prostate Cancer (Hispanic ED PPR = 0.66; Hispanic PC PPR = 0.63; AA ED PPR = 0.64; AA PC PPR = 0.58).Our analysis shows that both Hispanic and AA men are underrepresented in both ED and PC clinical trials.
- Published
- 2022
26. Identifying gaps in parental support for families of children with hypoplastic left heart syndrome
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Katherine Campbell, Timothy J. Nelson, Meghan Katers, Meghan Landry, Lynn Cern, and Erica Olson
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Parents ,medicine.medical_specialty ,Parental support ,Team Role Inventories ,Psychological intervention ,Mothers ,030204 cardiovascular system & hematology ,Hypoplastic left heart syndrome ,03 medical and health sciences ,0302 clinical medicine ,Surveys and Questionnaires ,030225 pediatrics ,Intervention (counseling) ,Adaptation, Psychological ,Hypoplastic Left Heart Syndrome ,medicine ,Humans ,Open communication ,Child ,business.industry ,Coping resources ,Timeline ,General Medicine ,medicine.disease ,Family medicine ,Pediatrics, Perinatology and Child Health ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Purpose:The purpose of this study is to identify gaps in support for parents of children with Hypoplastic Left Heart Syndrome.Design and methods:Using a mixed-methods approach, the researchers first studied the parental and care team experience through interviews of Hypoplastic Left Heart Syndrome mothers and members of the inter-professional care team and then conducted an international survey of 690 Hypoplastic Left Heart Syndrome primary caregivers to validate the qualitative findings.Results:Parental and care team interviews revealed three main gaps in parental support, including lack of open communication, unrealistic parental expectations, and unclear inter-professional team roles. Survey results found that parents whose children were diagnosed with Hypoplastic Left Heart Syndrome after birth indicated significant dissatisfaction with the care team’s open communication and welcoming of feedback (p = 0.008). As parents progress through the stages of surgical intervention, they also indicate significant dissatisfaction with the care team’s anticipation of parental emotional needs and provision of coping resources (p = 0.003).Conclusions:Parental support interventions should focus on providing resources to help parents cope, helping the care team model open communication, and welcoming feedback on the parental experience.Practice implications:Interventions should be piloted with parents who are in the later stages of the surgical intervention timeline or whose children were diagnosed after birth as they are the populations who perceived the least support within this study.
- Published
- 2021
27. Impact of COVID‐19 Pandemic on the Mental Health of Students From 2 Semi‐Rural High Schools in Georgia*
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Katherine Campbell, Thomas Cronin, Julie A. Gazmararian, Jasleen Ashta, and Rachel Weingart
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Gerontology ,Male ,Rural Population ,Georgia ,Adolescent ,media_common.quotation_subject ,education ,Ethnic group ,coronavirus ,Anxiety ,Education ,stress ,COVID‐19 ,medicine ,Humans ,adolescents ,Students ,Socioeconomic status ,Research Articles ,media_common ,health disparities ,Schools ,Depression ,SARS-CoV-2 ,Loneliness ,Public Health, Environmental and Occupational Health ,COVID-19 ,Mental health ,Health equity ,Race Factors ,Philosophy ,Cross-Sectional Studies ,Mental Health ,Feeling ,Socioeconomic Factors ,Female ,medicine.symptom ,Worry ,Psychology ,Research Article - Abstract
BACKGROUND Concerns have been raised about the consequences of the COVID‐19 pandemic on the mental health of adolescents during an important developmental and social period in their lives. This study examines the mental health impact of the pandemic on high school students shortly after closure of public schools in spring 2020, and whether this impact varies by sex, race/ethnicity, socioeconomic status (SES), and grade level. METHODS A cross‐sectional, one‐time online survey was completed by racial/ethnically and socioeconomically diverse students in 9th through 12th grade at 2 semi‐rural Georgia public high schools (N = 761). RESULTS Overall, almost one‐fourth of high school students were extremely or very worried about the pandemic, with higher rates of worry among students who are racial/ethnic minorities, lower SES, female and in older grades. Results indicated a concerning impact on the stress, anxiety, depression, and loneliness that students are feeling, particularly among girls and those in older grades. Students of color and low SES, who are already disproportionately impacted by COVID‐19, are also more likely to experience mental health challenges. CONCLUSIONS Findings highlight important demographic differences of the impact of COVID‐19 on the mental health of high school students and have implications for schools with addressing these needs.
- Published
- 2021
28. Environmental Toolkit to Promote Quality Sleep in Long-Term Care: A Quality Improvement Initiative
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Mary Mehelich, Siri Dusek, Katherine Campbell, Brenda Frie, Cynthia A. Graham, Alissa Hynes, and Lecia Heinen
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education.field_of_study ,Quality management ,Population ,Psychological intervention ,Social Sciences ,Context (language use) ,interprofessional ,Project team ,quality improvement ,non-pharmacological ,Long-term care ,Quality of life (healthcare) ,Nursing ,environmental modification ,Needs assessment ,Medicine ,sleep ,Psychology ,education - Abstract
Context: In long-term care (LTC), disturbed or inadequate sleep among older adult residents can exacerbate physical and cognitive conditions and decrease quality of life.Objectives: The quality improvement project sought to determine the feasibility and effectiveness of a multi-component environmental sleep toolkit designed to meet the needs of a LTC setting.Methods: The interdisciplinary project team conducted a needs assessment to determine the evidence-based interventions that were feasible for the setting. The team developed and implemented an environmental toolkit intervention, which sought to minimize sleep disruption from sound, light, routines, and diet. The team also provided staff education about sleep in older adults and the sleep environment.Findings: Post-intervention results showed improvement in overall sleep quality. Staff knowledge about sleep and the sleep environment was increased.Limitations: The toolkit interventions were relevant to a specific LTC residential setting, which may have implications for generalizability to other settings and facilities.Implications: Population-based environmental interventions are effective in improving sleep quality and life quality for older adults and are feasible for staff to implement and sustain.
- Published
- 2021
29. Gpr126/Adgrg6 contributes to the terminal Schwann cell response at the neuromuscular junction following peripheral nerve injury
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Katherine Campbell, Albina Jablonka-Shariff, Alison K. Snyder-Warwick, Chuieng Yi Lu, and Kelly R. Monk
- Subjects
0301 basic medicine ,animal structures ,Angiogenesis ,Schwann cell ,Nerve injury ,Biology ,Neuromuscular junction ,Cell biology ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,Vascular endothelial growth factor A ,030104 developmental biology ,0302 clinical medicine ,medicine.anatomical_structure ,nervous system ,Neurology ,Peripheral nerve injury ,medicine ,medicine.symptom ,Receptor ,030217 neurology & neurosurgery ,Reinnervation - Abstract
Gpr126/Adgrg6 is an adhesion G protein-coupled receptor essential for Schwann cell (SC) myelination with important contributions to repair after nerve crush injury. Despite critical functions in myelinating SCs, the role of Gpr126 within nonmyelinating terminal Schwann cells (tSCs) at the neuromuscular junction (NMJ), is not known. tSCs have important functions in synaptic maintenance and reinnervation, and after injury tSCs extend cytoplasmic processes to guide regenerating axons to the denervated NMJ. In this study, we show that Gpr126 is expressed in tSCs, and that absence of Gpr126 in SCs (SC-specific Gpr126 knockout, cGpr126) results in a NMJ maintenance defect in the hindlimbs of aged mice, but not in young adult mice. After nerve transection and repair, cGpr126 mice display delayed NMJ reinnervation, altered tSC morphology with decreased S100β expression, and reduced tSC cytoplasmic process extensions. The immune response promoting reinnervation at the NMJ following nerve injury is also altered with decreased macrophage infiltration, Tnfα, and anomalous cytokine expression compared to NMJs of control mice. In addition, Vegfa expression is decreased in muscle, suggesting that cGpr126 non-cell autonomously modulates angiogenesis after nerve injury. In sum, cGpr126 mice demonstrated delayed NMJ reinnervation and decreased muscle mass following nerve transection and repair compared to control littermates. The integral function of Gpr126 in tSCs at the NMJ provides the framework for new therapeutic targets for neuromuscular disease.
- Published
- 2020
30. Risk of postpartum readmission: a comparison between stillbirths and live births
- Author
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Lena Sweeney, Uma M. Reddy, Katherine Campbell, and Xiao Xu
- Subjects
Obstetrics and Gynecology - Published
- 2023
31. Development and Interrater Reliability of an Observational School Environment Checklist: A Practical, Comprehensive Tool to Assess Healthy Eating and Physical Activity Opportunities in Schools
- Author
-
Aaron Litz, Anne Zhang, Katherine Campbell, Hannah G. Lane, Jasmia Shropshire, Erin R. Hager, Lindsey Turner, and Rachel Deitch
- Subjects
Gerontology ,Nursing (miscellaneous) ,Schools ,Public Health, Environmental and Occupational Health ,Physical activity ,Psychological intervention ,Reproducibility of Results ,medicine.disease ,Obesity ,Checklist ,Inter-rater reliability ,Health promotion ,medicine ,Humans ,Observational study ,School environment ,Diet, Healthy ,Psychology ,Child ,Exercise - Abstract
Introduction Comprehensive, objective assessment of schools’ eating and physical activity environments is critical to developing and evaluating policies and interventions to reduce pediatric obesity inequities; however, few tools exist that describe the entire school comprehensively and are feasible with restricted resources. This study describes development and reliability of the observational school environment checklist (OSEC), a comprehensive observational audit tool. Method We developed the OSEC through iterative adaptations of existing instruments and pilot testing. The tool assesses four focus areas: cafeteria, lobby/hallway, gym, and outdoor areas. For reliability testing, two trained auditors independently completed the OSEC and met to resolve disagreements. For items with poor agreement, a third independent coder coded photographs taken during auditing. Percent agreement and Cohen’s kappa were calculated for all items and across four evidence-based constructs: atmosphere, accessibility, attractiveness, and advertising. Results After iterative development, the 88-item OSEC was tested for reliability in 18 schools. Items with poor (Implications The OSEC reliably and comprehensively captures the school environment. It requires few resources or expertise to administer, has acceptable reliability, and can assess atmosphere, accessibility, attractiveness, and advertising in school areas where students engage in eating and physical activity.
- Published
- 2021
32. An ecological momentary assessment study of physical activity behaviors among mothers of toddlers from low-income households
- Author
-
Katherine Campbell, Ann Pulling Kuhn, Erin R. Hager, Maureen M. Black, and Yan Wang
- Subjects
Low income ,Adult ,medicine.medical_specialty ,Maternal Health ,Ecological Momentary Assessment ,Physical activity ,Reproductive medicine ,Mothers ,030209 endocrinology & metabolism ,Overweight ,Assessment ,lcsh:Gynecology and obstetrics ,03 medical and health sciences ,Screen time ,0302 clinical medicine ,medicine ,Humans ,030212 general & internal medicine ,Exercise ,Poverty ,lcsh:RG1-991 ,Ecological Momentary ,Family Characteristics ,Ecology ,business.industry ,lcsh:Public aspects of medicine ,Public health ,Obstetrics and Gynecology ,lcsh:RA1-1270 ,General Medicine ,Physical Activity ,medicine.disease ,Obesity ,Reproductive Medicine ,Normal weight ,Child, Preschool ,Female ,Public Health ,medicine.symptom ,business ,Research Article - Abstract
Background Mothers of young children from low-income communities may be vulnerable to barriers associated with low physical activity. The purpose of this study was to examine associations between home environment factors and maternal physical activity among mothers of toddlers. Methods Mothers of toddlers (n = 200) recruited from low-income communities simultaneously wore an ankle-placed accelerometer and were given a personal digital assistant for ecological momentary assessment. Mothers received randomly prompted questions about their current environment, activity, and social setting several times a day over eight consecutive days. Data were analyzed using linear mixed-effects regression models with random intercepts; within-group and between-group relations between physical activity and environment factors were disaggregated. Results Within-group relations included higher physical activity counts for specific mothers with television off versus on (95% CI = 130.45, 199.17), children absent versus present (95% CI = 82.00, 3.43), engaging with a child versus not (95% CI = 52.66, 127.63), and outside versus inside location (95% CI = 277.74, 392.67). Between-group relations included higher physical activity on average when other adults were absent versus present (95% CI = − 282.63, − 46.95). Recruitment site (urban vs. semi-urban) significantly moderated the within-group relation between being outside versus inside and activity count (β = − 243.12, 95% CI = − 358.74, − 127.47), and showed stronger relations among urban mothers (β = 440.33, 95% CI = 358.41, 522.25), than semi-urban (β = 190.37, 95% CI = 109.64, 271.11). Maternal body weight significantly moderated the within-group relation between being located outside versus inside the home and activity count (β for interaction = − 188.67, 95% CI = − 308.95, − 68.39), with a stronger relation among mothers with normal weight (β = 451.62, 95% CI = 345.51, 557.73), than mothers with overweight/obesity (β = 271.95, 95% CI = 204.26, 339.64). Conclusions This study highlights home environmental factors, including screen time, the presence of others (adults and children), and location (i.e., outside versus inside) that may relate to maternal physical activity behaviors. Understanding factors associated with physical activity could reduce physical activity disparities. Trial registry ClinicalTrials. NCT02615158, April 2006
- Published
- 2021
33. 11 Enactments and Representations of the National Bard: Burns and the Folk Context
- Author
-
Katherine Campbell
- Published
- 2021
34. Enactments and Representations of the National Bard: Burns and the Folk Context
- Author
-
Katherine Campbell
- Abstract
The chapter examines the performance of Burns's songs in folk tradition drawing on two major sources of evidence: 'The Greig-Duncan Folk Song Collection' from Northeast Scotland and the Tobar an Dualchais/Kist o Riches website of archival audio recordings. It finds that Burns's songs could vary substantially from their original form as a result of the reworkings of folk tradition. In particular, the tune Burns desired was quite often not used once the song entered the tradition, with singers instead sometimes turning to something with which they were already familiar.
- Published
- 2021
35. Concept of cycle threshold values in SARS-CoV-2 positive patients at childbirth admission: a retrospective observational study
- Author
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Olga Grechukhina, Victoria Greenberg, Marie-Louise Landry, Christian M. Pettker, Jennifer Cate, and Katherine Campbell
- Subjects
education.field_of_study ,medicine.medical_specialty ,Pregnancy ,business.industry ,Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) ,Population ,Retrospective cohort study ,Disease ,medicine.disease ,Asymptomatic ,Internal medicine ,medicine ,Childbirth ,medicine.symptom ,education ,business ,Viral load - Abstract
Objective To evaluate relationships between cycle threshold values and COVID-19 presentations and clinical courses in women presenting for childbirth. Cycle threshold values from polymerase chain reaction (PCR) testing are inversely proportional to viral burden and may be important predictors of disease state and infectivity risk. Design Retrospective cohort study Setting Three Yale-New Haven Health Hospitals between 4/2/2020-5/14/2020 Population Women presenting for childbirth who underwent SARS-CoV-2 PCR testing Methods Electronic health records were reviewed for socio-demographics, medical comorbidities, pregnancy and postpartum course, and COVID-19 symptoms and exposures. Records of SARS-CoV-2 positive women were reviewed for symptom onset, duration, and relation to test timing, disease course, and neonatal SARS-CoV-2 results. Main Outcome Measures SARS-CoV-2 real-time PCR cycle threshold values from positive tests were compared between asymptomatic and symptomatic women and in relation to disease severity. In women with symptomatic COVID-19, cycle threshold values were evaluated as a function of time since symptom onset. Results 1,210 women gave birth during the study period with 84 (6.9%) positive for SARS-CoV-2. Higher cycle threshold values were seen in asymptomatic SARS-CoV-2 positive patients (8/38 (21.1%) of asymptomatic women had cycle threshold
- Published
- 2020
36. Understanding faculty perspectives of supports and barriers to interprofessional collaboration within a clinical scholars program: A qualitative study
- Author
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Katherine Campbell, Patricia Finch Guthrie, Diane Fittipaldi, and Brenda Frie
- Subjects
Evidence-based practice ,Higher education ,media_common.quotation_subject ,Interprofessional Relations ,education ,Context (language use) ,Education ,03 medical and health sciences ,0302 clinical medicine ,Humans ,030212 general & internal medicine ,Nurse education ,General Nursing ,Qualitative Research ,media_common ,Teamwork ,Medical education ,030504 nursing ,business.industry ,General Medicine ,Interprofessional education ,Focus group ,Faculty ,Leadership ,0305 other medical science ,business ,Psychology ,Qualitative research - Abstract
Aim This study explores the faculty perspective of an interprofessional clinical scholars program to identify recommendations for strengthening team collaboration between academia and clinical practice. Background Interprofessional evidence-based practice, pairing higher education and clinical practice, is a critical part of nursing education. Design This qualitative study consisted of two phases of participant engagement, in both data collection and data analysis. Methods Specifically, faculty participated in a focus group discussion followed by a card sort of initial codes. Results The major themes identified are Unifying the Team and Navigating Layers of Challenge, encompassing concepts of teamwork and programmatic context that supported or disrupted interprofessional collaboration. This study affirms the importance of role clarity, connectedness, intentionality and continuity within clinical teams. Moreover, faculty identified barriers to teamwork based on workload, leadership turnover and constraining environmental forces. Conclusions Recommendations for effective teamwork in an interprofessional setting will strengthen future collaboration between higher education and clinical settings.
- Published
- 2020
37. Future Directions: Analyzing Health Disparities Related to Maternal Hypertensive Disorders
- Author
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Mary O. Hearst, Margaret Harris, Katherine Campbell, and Colette Henke
- Subjects
Gestational hypertension ,Risk ,Psychological intervention ,Ethnic group ,Review Article ,Weight Gain ,Preeclampsia ,Pregnancy ,Environmental health ,medicine ,Prevalence ,Humans ,Healthcare Disparities ,business.industry ,Racial Groups ,Age Factors ,Obstetrics and Gynecology ,Gynecology and obstetrics ,medicine.disease ,Health equity ,United States ,Gestational diabetes ,Pregnancy Complications ,Diabetes, Gestational ,Hypertension ,RG1-991 ,Gestation ,Educational Status ,Female ,business - Abstract
Hypertensive disorders of pregnancy complicate up to 10% of pregnancies worldwide, constituting one of the most significant causes of maternal morbidity and mortality. Hypertensive disorders, specifically gestational hypertension, chronic hypertension, and preeclampsia, throughout pregnancy are contributors to the top causes of maternal mortality in the United States. Diagnosis of hypertensive disorders throughout pregnancy is challenging, with many disorders often remaining unrecognized or poorly managed during and after pregnancy. Moreover, the research has identified a strong link between the prevalence of maternal hypertensive disorders and racial and ethnic disparities. Factors that influence the prevalence of maternal hypertensive disorders among racially and ethnically diverse women include maternal age, level of education, United States-born status, nonmetropolitan residence, prepregnancy obesity, excess weight gain during pregnancy, and gestational diabetes. Examination of the factors that increase the risk for maternal hypertensive disorders along with the current interventions utilized to manage hypertensive disorders will assist in the identification of gaps in prevention and treatment strategies and implications for future practice. Specific focus will be placed on disparities among racially and ethnically diverse women that increase the risk for maternal hypertensive disorders. This review will serve to promote the development of interventions and strategies that better address and prevent hypertensive disorders throughout a pregnant woman’s continuum of care.
- Published
- 2020
38. Do we 'fear for the worst' or 'Hope for the best' in thinking about the unexpected?: Factors affecting the valence of unexpected outcomes reported for everyday scenarios
- Author
-
Katherine Campbell, Molly S. Quinn, and Mark T. Keane
- Subjects
Linguistics and Language ,Cognitive Neuroscience ,05 social sciences ,Experimental and Cognitive Psychology ,Negative bias ,Anxiety ,050105 experimental psychology ,Language and Linguistics ,03 medical and health sciences ,0302 clinical medicine ,Unexpected events ,Negativity bias ,Developmental and Educational Psychology ,Humans ,0501 psychology and cognitive sciences ,Valence (psychology) ,Psychology ,Social psychology ,030217 neurology & neurosurgery - Abstract
Though we often “fear the worst”, worrying that unexpectedly bad things will happen, there are times when we “hope for the best”, imagining that unexpectedly good things will happen, too. The paper explores how the valence of the current situation influences people's imagining of unexpected future events when participants were instructed to think of “something unexpected”. In Experiment 1, participants (N = 127) were asked to report unexpected events to everyday scenarios under different instructional conditions (e.g., asked for “good” or “bad” unexpected events), and manifested a strong negativity bias in response to non-valenced instructions (i.e., being asked to “think of the unexpected” with no valence given). They mainly reported quite “predictable” unexpected outcomes that were negative; however, a post-test (N = 31) showed that the scenarios used were predominantly positive. In Experiment 2 (N = 257), when participants were instructed to think of “something unexpected and bizarre”, under the same instructional manipulations as Experiment 1, this negativity bias was replicated. In Experiment 3, using a design in which positive/negative materials were matched (verified by a pre-test, N = 60), it was found that when participants (N = 102) were given negative scenarios, they reported more positive events than they do when they are given positive scenarios. Though responding still retained an overwhelming negative bias, this result provided some evidence for a weaker valence-countering strategy; that is, where a negative scenario can lead to positive unexpected events being mentioned, and a positive scenario leads to negative unexpected events being reported. The implications of these results for people's projections of unexpected futures in their everyday lives is discussed.
- Published
- 2020
39. Abstract 194: Gpr126 Contributes To The Terminal Schwann Cell Injury Response At The Neuromuscular Junction
- Author
-
Johnny Chuieng-Yi Lu, Albina Jablonka-Shariff, Katherine Campbell, Kelly R. Monk, and Alison K. Snyder-Warwick
- Subjects
medicine.anatomical_structure ,Terminal (electronics) ,business.industry ,PSRC Abstract Supplement ,medicine ,lcsh:Surgery ,Schwann cell ,Surgery ,lcsh:RD1-811 ,business ,Injury response ,Neuromuscular junction ,Cell biology - Published
- 2020
40. Cardiac Kir2.1 and Na V 1.5 Channels Traffic Together to the Sarcolemma to Control Excitability
- Author
-
Eva Delpón, Rafael J. Ramirez, Marcos Matamoros, Todd J. Herron, Daniela Ponce-Balbuena, Kuljeet Kaur, Héctor H. Valdivia, Manuel Zarzoso, Francisco J. Alvarado, B. Cicero Willis, Eric N. Jiménez-Vázquez, F. Javier Díez-Guerra, José Jalife, Ricardo Caballero, Carmen R. Valdivia, Andre Monteiro da Rocha, Guadalupe Guerrero-Serna, Marta Pérez-Hernández, and Katherine Campbell
- Subjects
0301 basic medicine ,Sarcolemma ,biology ,Physiology ,Chemistry ,Membrane bound ,Kir2.1 ,Heart ,Nav1.5 ,Golgi apparatus ,Article ,NAV1.5 Voltage-Gated Sodium Channel ,03 medical and health sciences ,symbols.namesake ,Electrophysiology ,030104 developmental biology ,cardiovascular system ,biology.protein ,symbols ,Biophysics ,Macromolecular Complexes ,Cardiology and Cardiovascular Medicine ,Ion channel - Abstract
Rationale: In cardiomyocytes, Na V 1.5 and Kir2.1 channels interact dynamically as part of membrane bound macromolecular complexes. Objective: The objective of this study was to test whether Na V 1.5 and Kir2.1 preassemble during early forward trafficking and travel together to common membrane microdomains. Methods and Results: In patch-clamp experiments, coexpression of trafficking-deficient mutants Kir2.1 Δ314-315 or Kir2.1 R44A/R46A with wild-type (WT) Na V 1.5 WT in heterologous cells reduced inward sodium current compared with Na V 1.5 WT alone or coexpressed with Kir2.1 WT . In cell surface biotinylation experiments, expression of Kir2.1 Δ314-315 reduced Na V 1.5 channel surface expression. Glycosylation analysis suggested that Na V 1.5 WT and Kir2.1 WT channels associate early in their biosynthetic pathway, and fluorescence recovery after photobleaching experiments demonstrated that coexpression with Kir2.1 increased cytoplasmic mobility of Na V 1.5 WT , and vice versa, whereas coexpression with Kir2.1 Δ314-315 reduced mobility of both channels. Viral gene transfer of Kir2.1 Δ314-315 in adult rat ventricular myocytes and human induced pluripotent stem cell–derived cardiomyocytes reduced inward rectifier potassium current and inward sodium current, maximum diastolic potential and action potential depolarization rate, and increased action potential duration. On immunostaining, the AP1 (adaptor protein complex 1) colocalized with Na V 1.5 WT and Kir2.1 WT within areas corresponding to t-tubules and intercalated discs. Like Kir2.1 WT , Na V 1.5 WT coimmunoprecipitated with AP1. Site-directed mutagenesis revealed that Na V 1.5 WT channels interact with AP1 through the Na V 1.5 Y1810 residue, suggesting that, like for Kir2.1 WT , AP1 can mark Na V 1.5 channels for incorporation into clathrin-coated vesicles at the trans -Golgi. Silencing the AP1 ϒ-adaptin subunit in human induced pluripotent stem cell–derived cardiomyocytes reduced inward rectifier potassium current, inward sodium current, and maximum diastolic potential and impaired rate-dependent action potential duration adaptation. Conclusions: The Na V 1.5-Kir2.1 macromolecular complex pre-assembles early in the forward trafficking pathway. Therefore, disruption of Kir2.1 trafficking in cardiomyocytes affects trafficking of Na V 1.5, which may have important implications in the mechanisms of arrhythmias in inheritable cardiac diseases.
- Published
- 2018
41. Management’s personal ideology and financial reporting quality
- Author
-
Adam R. Smedema, Katherine Campbell, Matthew Notbohm, and Tianming Zhang
- Subjects
Finance ,050208 finance ,Accrual ,business.industry ,Corporate governance ,05 social sciences ,050201 accounting ,Commission ,Audit ,General Business, Management and Accounting ,Corporate finance ,Earnings management ,Accounting ,0502 economics and business ,Earnings quality ,Business ,Financial statement - Abstract
We investigate the relation between managers’ personal ideologies and financial reporting quality. We use Federal Elections Commission data to develop three proxies for managers’ personal ideologies and test their relations with two financial reporting quality metrics: discretionary accruals and financial statement restatements. We find that both the absolute value of discretionary accruals and the probability of restatement decrease in the degree to which firms’ managers have conservative ideologies. These results are robust in the post-SOX period, to controls for potential self-selection bias, to alternative measures of both ideology and financial reporting quality, and to controls for firm political sensitivity, lobbying activity, governance, operational complexity and auditor strength. Our findings contribute to a growing literature demonstrating that business outcomes are partially explained by manager-specific factors including managers’ personal views and priorities.
- Published
- 2018
42. 1140 Stillbirth cause and potential preventability in tertiary care hospital population
- Author
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Katherine Campbell, Lena Sweeney, Uma M. Reddy, and Lisbet S. Lundsberg
- Subjects
medicine.medical_specialty ,education.field_of_study ,business.industry ,Emergency medicine ,Population ,medicine ,Obstetrics and Gynecology ,Tertiary care hospital ,education ,business - Published
- 2021
43. hiPSC-CM Monolayer Maturation State Determines Drug Responsiveness in High Throughput Pro-Arrhythmia Screen
- Author
-
Jiang Jiang, Andre Monteiro da Rocha, Sergey Mironov, Lakshmi Mundada, José Jalife, Katherine Campbell, Guadalupe Guerrero-Serna, Todd J. Herron, National Institutes of Health (Estados Unidos), Lefkofsky Family Foundation, and UM Frankel Cardiovascular Center
- Subjects
0301 basic medicine ,Induced Pluripotent Stem Cells ,Drug Evaluation, Preclinical ,Action Potentials ,lcsh:Medicine ,Pharmacology ,Article ,Small Molecule Libraries ,03 medical and health sciences ,Drug Discovery ,Medicine ,Humans ,Myocytes, Cardiac ,Induced pluripotent stem cell ,lcsh:Science ,health care economics and organizations ,Cells, Cultured ,Cardiotoxicity ,Multidisciplinary ,Framingham Risk Score ,business.industry ,Drug discovery ,lcsh:R ,Arrhythmias, Cardiac ,Phenotype ,In vitro ,3. Good health ,High-Throughput Screening Assays ,030104 developmental biology ,Drug responsiveness ,lcsh:Q ,business ,Risk classification - Abstract
Human induced pluripotent stem cell derived cardiomyocytes (hiPSC-CMs) offer a novel in vitro platform for pre-clinical cardiotoxicity and pro-arrhythmia screening of drugs in development. To date hiPSC-CMs used for cardiotoxicity testing display an immature, fetal-like cardiomyocyte structural and electrophysiological phenotype which has called into question the applicability of hiPSC-CM findings to the adult heart. The aim of the current work was to determine the effect of cardiomyocyte maturation state on hiPSC-CM drug responsiveness. To this end, here we developed a high content pro-arrhythmia screening platform consisting of either fetal-like or mature hiPSC-CM monolayers. Compounds tested in the screen were selected based on the pro-arrhythmia risk classification (Low risk, Intermediate risk, or High risk) established recently by the FDA and major stakeholders in the Drug Discovery field for the validation of the Comprehensive In vitro Pro-Arrhythmia Assay (CiPA). Here we show that maturation state of hiPSC-CMs determines the absolute pro-arrhythmia risk score calculated for these compounds. Thus, the maturation state of hiPSC-CMs should be considered prior to pro-arrhythmia and cardiotoxicity screening in drug discovery programs. Research reported in this publication was supported by the National Institute of Environmental Health Sciences of the National Institutes of Health under Award Number R43ES027703. This study was also supported by the Lefkofsky Family Foundation (T.J.H.), the UM Frankel Cardiovascular Center (T.J.H.), and the State of Michigan Economic Development Fund (U-M Michigan Translational Research and Commercialization for Life Sciences Program [U-M MTRAC], T.J.H. and J.J.) Sí
- Published
- 2017
44. Effect of Glucose on 3D Cardiac Microtissues Derived from Human Induced Pluripotent Stem Cells
- Author
-
Katherine Campbell, Andre Monteiro da Rocha, Justin Davis, Michael Balistreri, Marjorie C. Treadwell, and Todd J. Herron
- Subjects
0301 basic medicine ,Induced Pluripotent Stem Cells ,Cell Culture Techniques ,chemistry.chemical_element ,Calcium ,03 medical and health sciences ,Optical mapping ,Calcium flux ,medicine ,Humans ,Myocytes, Cardiac ,Human Induced Pluripotent Stem Cells ,Induced pluripotent stem cell ,Fetus ,business.industry ,Cell Differentiation ,Anatomy ,Flow Cytometry ,Voltage-Sensitive Dye Imaging ,Cell biology ,Glucose ,030104 developmental biology ,chemistry ,Hyperglycemia ,Pediatrics, Perinatology and Child Health ,Mannitol ,Stem cell ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
Maternal hyperglycemia is a risk factor for fetal cardiac anomalies. This study aimed to assess the effect of high glucose on human induced pluripotent stem cell-derived cardiomyocyte self-assembly into 3D microtissues and their calcium handling. Stem cells were differentiated to beating cardiomyocytes using established protocols. On the final day of the differentiation process, cells were treated with control media, 12 mM glucose, or 12 mM mannitol (an osmolality control). Once beating, the cardiac cells were dissociated with trypsin, collected, mixed with collagen, and plated into custom-made silicone micro molds in order to generate 3D cardiac microtissues. A time-lapse microscope took pictures every 4 h to quantify the kinetics of cellular self-assembly of 3D cardiac tissues. Fiber widths were recorded at 4-h intervals and plotted over time to assess cardiomyocyte 3D fiber self-assembly. Microtissue calcium flux was recorded with optical mapping by pacing microtissues at 0.5 and 1.0 Hz. Exposure to high glucose impaired the ability of cardiomyocytes to self-assemble into compact microtissues, but not their ability to spontaneously contract. Glucose-exposed cardiomyocytes took longer to self-assemble and finished as thicker fibers. When cardiac microtissues were paced at 0.5 and 1.0 Hz, those exposed to high glucose had altered calcium handling with shorter calcium transient durations, but larger amplitudes of the calcium transient when compared to controls. Additional studies are needed to elucidate a potential mechanism for these findings. This model provides a novel method to assess the effects of exposures on the cardiomyocytes' intrinsic abilities for organogenesis in 3D.
- Published
- 2017
45. 122: Leading causes and preventability of severe maternal morbidity cases in a large urban referral center
- Author
-
Audrey A. Merriam, Katherine Campbell, Heather S. Lipkind, Olga Grechukhina, Cheryl Raab, Lisbet S. Lundsberg, and Jane O'Bryan
- Subjects
medicine.medical_specialty ,business.industry ,Emergency medicine ,medicine ,Obstetrics and Gynecology ,Referral center ,Maternal morbidity ,business - Published
- 2020
46. Starbucks: Social responsibility and tax avoidance
- Author
-
Katherine Campbell and Duane Helleloid
- Subjects
Finance ,business.industry ,05 social sciences ,Subsidiary ,050201 accounting ,Tax reform ,Tax avoidance ,Education ,Taxable income ,Multinational corporation ,Accounting ,0502 economics and business ,Economics ,Corporate social responsibility ,Marketing ,business ,Social responsibility ,050203 business & management ,Corporate tax - Abstract
This instructional case is designed to explore how accounting choices, and specifically tax minimization practices, should consider a company's overall strategy and positioning within multiple stakeholder groups. Starbucks had been successful in growing its stores and presence in the United Kingdom (UK), and described the profitable growth to investors as something it wanted to build on in other international markets. However, in its 15 years of operations in the UK, the company had paid UK corporate income taxes only once. Using a combination of legal tax avoidance practices (e.g., transfer prices, royalty payments, interest expense), Starbucks UK had effectively shifted taxable income to other Starbucks subsidiaries where it would be taxed at lower rates. In 2012, Starbucks in the UK faced a public relations furor over its failure to pay British corporate income taxes. While the tax avoidance practices Starbucks used were common among multinational companies, Starbucks had been very public in its commitment to being socially responsible and a good citizen of the communities in which it operated. This included, among other aspects, paying fair wages to employees and paying fair prices to coffee growers in developing countries. Thus, its critics found it easy to point out that not paying its fair share of taxes was inconsistent with the image Starbucks was portraying to consumers. Case questions are designed to help you think about the strategic, legal, ethical, and public relations implications of tax minimization strategies, especially when companies portray themselves as responsible “citizens” of the communities in which they operate. The questions also probe whether other characteristics of firms, including their “home” country and the nature of the business, have implications for public perceptions about corporate tax minimization strategies.
- Published
- 2016
47. In vitro model of ischemic heart failure using human induced pluripotent stem cell-derived cardiomyocytes
- Author
-
Eric N. Jimenez Vazquez, Katherine Campbell, Andrey Lozhkin, Jeffery Creech, Justin Davis, Daniela Ponce-Balbuena, Ahmad Chouman, Nageswara R. Madamanchi, Todd J. Herron, Andre Monteiro da Rocha, and Ruthann Nichols
- Subjects
0301 basic medicine ,Cell ,Population ,Induced Pluripotent Stem Cells ,Myocardial Ischemia ,Cardiology ,Action Potentials ,Flow cytometry ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,Myocytes, Cardiac ,Induced pluripotent stem cell ,education ,Cells, Cultured ,Membrane potential ,Heart Failure ,Cardiotoxicity ,education.field_of_study ,medicine.diagnostic_test ,Chemistry ,Models, Cardiovascular ,Cell Differentiation ,General Medicine ,Cell Biology ,medicine.disease ,Cardiovascular disease ,Cell biology ,Blot ,030104 developmental biology ,medicine.anatomical_structure ,Technical Advance ,030220 oncology & carcinogenesis ,Heart failure - Abstract
Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) have been used extensively to model inherited heart diseases, but hiPSC-CM models of ischemic heart disease are lacking. Here, our objective was to generate an hiPSC-CM model of ischemic heart disease. To this end, hiPSCs were differentiated into functional hiPSC-CMs and then purified using either a simulated ischemia media or by using magnetic antibody-based purification targeting the nonmyocyte population for depletion from the cell population. Flow cytometry analysis confirmed that each purification approach generated hiPSC-CM cultures that had more than 94% cTnT+ cells. After purification, hiPSC-CMs were replated as confluent syncytial monolayers for electrophysiological phenotype analysis and protein expression by Western blotting. The phenotype of metabolic stress-selected hiPSC-CM monolayers recapitulated many of the functional and structural hallmarks of ischemic CMs, including elevated diastolic calcium, diminished calcium transient amplitude, prolonged action potential duration, depolarized resting membrane potential, hypersensitivity to chemotherapy-induced cardiotoxicity, depolarized mitochondrial membrane potential, depressed SERCA2a expression, reduced maximal oxygen consumption rate, and abnormal response to β1-adrenergic receptor stimulation. These findings indicate that metabolic selection of hiPSC-CMs generated cell populations with phenotype similar to what is well known to occur in the setting of ischemic heart failure and thus provide a opportunity for study of human ischemic heart disease.
- Published
- 2019
48. Future Directions: Analyzing Health Disparities Related to Maternal Hypertensive Disorders
- Author
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Katherine Campbell
- Published
- 2019
49. Functional cardiac fibroblasts derived from human pluripotent stem cells via second heart field progenitors
- Author
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Ran Tao, Todd J. Herron, Eric G. Schmuck, Timothy J. Kamp, Gina Kim, Amish N. Raval, José Jalife, Katherine Campbell, James A. Thomson, Jianhua Zhang, Edward C. Ruiz, Juliana Lott Carvalho, Andre Monteiro da Rocha, and National Institutes of Health (Estados Unidos)
- Subjects
musculoskeletal diseases ,0301 basic medicine ,Intravital Microscopy ,Science ,Cellular differentiation ,Induced Pluripotent Stem Cells ,Primary Cell Culture ,Stem-cell differentiation ,General Physics and Astronomy ,Heart failure ,02 engineering and technology ,Biology ,Article ,General Biochemistry, Genetics and Molecular Biology ,Cell Line ,03 medical and health sciences ,Humans ,Progenitor cell ,lcsh:Science ,Induced pluripotent stem cell ,Multidisciplinary ,Heart development ,Myocardium ,Wnt signaling pathway ,virus diseases ,Cell Differentiation ,Heart ,Dermis ,General Chemistry ,Fibroblasts ,021001 nanoscience & nanotechnology ,Embryonic stem cell ,Angiotensin II ,Coculture Techniques ,Healthy Volunteers ,nervous system diseases ,3. Good health ,Cell biology ,030104 developmental biology ,Microscopy, Fluorescence ,lcsh:Q ,Cardiac regeneration ,0210 nano-technology ,Heart stem cells ,human activities ,Myofibroblast - Abstract
Cardiac fibroblasts (CFs) play critical roles in heart development, homeostasis, and disease. The limited availability of human CFs from native heart impedes investigations of CF biology and their role in disease. Human pluripotent stem cells (hPSCs) provide a highly renewable and genetically defined cell source, but efficient methods to generate CFs from hPSCs have not been described. Here, we show differentiation of hPSCs using sequential modulation of Wnt and FGF signaling to generate second heart field progenitors that efficiently give rise to hPSC-CFs. The hPSC-CFs resemble native heart CFs in cell morphology, proliferation, gene expression, fibroblast marker expression, production of extracellular matrix and myofibroblast transformation induced by TGFβ1 and angiotensin II. Furthermore, hPSC-CFs exhibit a more embryonic phenotype when compared to fetal and adult primary human CFs. Co-culture of hPSC-CFs with hPSC-derived cardiomyocytes distinctly alters the electrophysiological properties of the cardiomyocytes compared to co-culture with dermal fibroblasts. The hPSC-CFs provide a powerful cell source for research, drug discovery, precision medicine, and therapeutic applications in cardiac regeneration., Cardiac fibroblasts (CFs) play critical roles in heart development, homeostasis, and disease. Here the authors efficiently differentiate human pluripotent stem cells through second heart field progenitors to CFs that exhibit features and functional properties similar to native CFs.
- Published
- 2019
50. 743 Mode of delivery in singleton stillbirths and associated risk factors
- Author
-
Katherine Underwood, Katherine Campbell, Hillary Hosier, Xiao Xu, Lena Sweeney, and Uma M. Reddy
- Subjects
medicine.medical_specialty ,Mode of delivery ,Obstetrics ,Singleton ,business.industry ,medicine ,Obstetrics and Gynecology ,business - Published
- 2021
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