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Onchonga D, Mohamed EA. Integrating social determinants of health in medical education: a bibliometric analysis study. Public Health 2023; 224:203-208. [PMID: 37826887 DOI: 10.1016/j.puhe.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/15/2023] [Accepted: 09/07/2023] [Indexed: 10/14/2023]
Abstract
OBJECTIVES Social determinants of health (SDH) are the prevalent enablers of health among populations, and integrating them in medical education will advance clinical care by integrating social and economic risk data into medical diagnosis and treatment. Despite the numerous publications on SDH and medical education, the publication trends are not known. The study aims to analyse publication trends in integrating SDH into medical education and the corresponding thematic areas. STUDY DESIGN This was a bibliometric analysis study. METHODS Bibliometric was used. Data from Scopus databases from January 2006 to June 2023 were retrieved with no language restriction. VOSviewer software was used for analysis. Bibliographic coupling was used to identify the clusters of published literature on the integration of SDH into medical education, followed by the analysis of annual distribution and growth trends, authors and co-author relationships and collaborations. RESULTS A total of 1047 articles were retrieved. The annual research publication exhibited a swift surge in the studies conducted during the reviewed period. Five clusters of information were derived: relating to curriculum development, community engagement and service-learning, stakeholder collaborations, development of assessment methods and tools for SDH, and the impact of integrating SDH into medical education. CONCLUSION Bibliometric analysis has revealed a growing trend in the field of integrating SDH into medical education, and the study has highlighted the research impact through bibliographic coupling by identifying the five thematic areas. This study lays a foundation for advancing knowledge on what has been published and possible areas for improvement in the integration of SDH into medical education.
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Affiliation(s)
- D Onchonga
- School of Medicine, University of Limerick, Limerick, V94 T9PX, Ireland; Faculty of Health Sciences and Wellbeing, University of Sunderland, Sunderland, SR1 3SD, England.
| | - E A Mohamed
- School of Medicine, University of Limerick, Limerick, V94 T9PX, Ireland
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Mohamed EA, Giama NH, Abdalla AO, Shaleh HM, Oseini AM, Ali HA, Ahmed F, Taha W, Ahmed Mohammed H, Cvinar J, Waaeys IA, Ali H, Allotey LK, Ali AO, Mohamed SA, Harmsen WS, Ahmmad EM, Bajwa NA, Afgarshe MD, Shire AM, Balls-Berry JE, Roberts LR. High prevalence of chronic viral hepatitis B and C in Minnesota Somalis contributes to rising hepatocellular carcinoma incidence. World J Gastroenterol 2022; 28:5217-5229. [PMID: 36188718 PMCID: PMC9516675 DOI: 10.3748/wjg.v28.i35.5217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/28/2022] [Accepted: 08/17/2022] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infections are known risk factors for liver disease, cirrhosis and hepatocellular carcinoma (HCC). There is substantial global variation in HBV and HCV prevalence resulting in variations in cirrhosis and HCC. We previously reported high prevalence of HBV and HCV infections in Somali immigrants seen at an academic medical center in Minnesota.
AIM To determine the prevalence of chronic viral hepatitis in Somali immigrants in Minnesota through a community-based screening program.
METHODS We conducted a prospective community-based participatory research study in the Somali community in Minnesota in partnership with community advisory boards, community clinics and local mosques between November 2010 and December 2015 (data was analyzed in 2020). Serum was tested for hepatitis B surface antigen, hepatitis B core antibody, hepatitis B surface antibody and anti-HCV antibody.
RESULTS Of 779 participants, 15.4% tested positive for chronic HBV infection, 50.2% for prior exposure to HBV and 7.6% for chronic HCV infection. Calculated age-adjusted frequencies in males and females for chronic HBV were 12.5% and 11.6%; for prior exposure to HBV were 44.8% and 41.3%; and for chronic HCV were 6.7% and 5.7%, respectively. Seven participants developed incident HCC during follow up.
CONCLUSION Chronic HBV and HCV are major risk factors for liver disease and HCC among Somali immigrants, with prevalence of both infections substantially higher than in the general United States population. Community-based screening is essential for identifying and providing health education and linkage to care for diagnosed patients.
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Affiliation(s)
- Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Center for Clinical and Translational Science, Mayo Clinic, Rochester, MN 55905, United States
| | - Nasra H Giama
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- School of Nursing, University of Minnesota, Minneapolis, MN 55455, United States
| | - Abubaker O Abdalla
- Division of Digestive Diseases, Emory School of Medicine, Atlanta, GA 30322, United States
| | - Hassan M Shaleh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, United States
| | - Abdul M Oseini
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Hamdi A Ali
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Fowsiyo Ahmed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Wesam Taha
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Department of Internal Medicine, NewYork-Presbyterian Queens, Flushing, NY 11355, United States
| | - Hager Ahmed Mohammed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Department of Pediatrics, University of Nevada Las Vegas, Las Vegas, NV 89154, United States
| | - Jessica Cvinar
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Ibrahim A Waaeys
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, United States
| | - Hawa Ali
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Loretta K Allotey
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Abdiwahab O Ali
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, United States
| | - Safra A Mohamed
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, United States
| | - William S Harmsen
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905, United States
| | - Eimad M Ahmmad
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Numra A Bajwa
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Mohamud D Afgarshe
- Department of Medicine, Gargar Urgent Care and Clinic, Minneapolis, MN 55406, United States
| | - Abdirashid M Shire
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Office of the Director, Shire Scientific, Minneapolis, MN 55405, United States
| | - Joyce E Balls-Berry
- Center for Clinical and Translational Science, Mayo Clinic, Rochester, MN 55905, United States
- Department of Neurology, Washington University School of Medicine in St Louis, St Louis, MO 63130, United States
- Knight Alzheimer Disease Research Center, Washington University School of Medicine, St Louis, MO 63130, United States
| | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
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Sulaiman TA, Suliman AA, Mohamed EA, Rodgers B, Altak A, Johnston WM. Mechanical Properties of Bisacryl-, Composite-, and Ceramic-resin Restorative Materials. Oper Dent 2022; 47:97-106. [PMID: 35029680 DOI: 10.2341/20-191-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Resin-based materials used in restorative dentistry are introduced at a fast pace with limited knowledge about their properties. Comparing properties of these materials from different restorative categories is lacking but can help the clinician in material selection. This study aimed to compare mechanical properties and wear resistance of bis-acryl-, composite-, and ceramic-resin restorative materials. METHODS AND MATERIALS Bisacryl-resin (Bis-R, LuxaCrown, DMG), composite-resin (Com-R, Filtek Supreme Ultra, 3M Oral Care), and ceramic-resin (Cer-R, Enamic, VITA Zahnfabrik) specimens were prepared for mechanical tests: fracture toughness (FT) with and without initial thermomechanical loading using a mastication simulator, flexural strength (FS), and flexural modulus (FM), compressive strength (CS), and volumetric wear loss measurement. The datasets for FT and wear resistance were each analyzed using two-way ANOVA followed by pairwise comparisons or Tukey testing as appropriate. The datasets for FS, FM, and CS were analyzed using one-way ANOVA followed by the Tukey test. RESULTS Analysis of FS, FM, and CS showed significant differences between materials, with all pairwise comparisons between materials showing significance. Analysis of FT resulted in a significant interaction between the material and treatment, with analysis of wear loss showing a significant interaction between the material and the number of cycles. CONCLUSIONS Cer-R demonstrated superior FT, CS, and wear resistance compared to Bis-R and Comp-R materials. Fracture toughness of Bis-R increased after thermomechanical loading.
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Affiliation(s)
- T A Sulaiman
- *Taiseer A Sulaiman, DDS, PhD, assistant professor, Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA
| | - A A Suliman
- Abdulhaq Suliman, BDS, MS, MS, PhD, professor, Restorative Dentistry Department, College of Dentistry, Ajman University, Ajman, UAE
| | - E A Mohamed
- Esraa A Mohamed, BSc (Eng.), research assistant, Oral and Craniofacial Health Sciences, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA
| | - B Rodgers
- Brandon Rodgers, BS, research assistant, Oral and Craniofacial Health Sciences, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA
| | - A Altak
- Ali Altak, DDS, resident, Graduate Operative and Biomaterials, Division of Comprehensive Oral Health, University of North Carolina, Adams School of Dentistry, Chapel Hill, NC, USA
| | - W M Johnston
- William M. Johnston, PhD, professor emeritus, College of Dentistry, The Ohio State University, Columbus, OH, USA
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Hyseni F, Vokshi V, Kola E, Fathma S, Guy A, Bushati F, Ahmetgjekaj I, Hla D, Saliaj K, Ikram S, Mohamed EA, Bajwa IA, Nasir F, Musa J. The importance of computed tomography (CT) scans in the early diagnosis of Gorham-Stout Disease - A case report. Radiol Case Rep 2021; 17:492-495. [PMID: 34950281 PMCID: PMC8671801 DOI: 10.1016/j.radcr.2021.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 11/28/2022] Open
Abstract
Gorham Stout disease (GSD) or vanishing bone disease is an infrequent entity in clinical practice characterized by gross and progressive bone loss along with excessive growth of vascular and lymphatic tissue. Very little is known about the pathogenesis of GSD, which makes the diagnosis challenging. Due to the rarity of the disease, no treatment guidelines have been created yet. We report a case of GSD in a 53-year-old male patient. He presented with bone pain and initial imaging showed widespread osteolytic lesions in the cervical and mid thoracic spine, ribs, sternum, clavicles, scapula and humerus. Two percutaneous bone biopsies were performed, followed by an open spine biopsy of the L2 spinous processes for histological examination. Unfortunately, no diagnosis was established. Although, he was treated symptomatically, he kept enduring pain and presented again after seven months. His laboratory values were out of the normal range which prompted thorough investigations. New imaging and bone biopsy revealed multiple osteolytic lesions and vascular lesions with cavernous morphology. GSD was diagnosed after ruling out a neoplastic process and confirming the cavernous morphology with immunohistochemical stain. He was treated symptomatically with immunomodulators, bisphosphonates and supplements. Regular follow-up with a specialist was recommended. We hope this case will raise awareness of GSD in common clinical practice and shed some insight on its clinical presentation and the role CT and other imaging modalities play in the diagnosis of GSD.
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Affiliation(s)
- Fjolla Hyseni
- Medical Researcher, NYU Langone Health, New York, USA
| | - Valon Vokshi
- Department of Anesthesiology, University Clinical Center of Kosovo
| | - Erisa Kola
- Department of Pathology, Gjirokaster, Albania
| | - Sawsan Fathma
- Critical Care Research, Department of Anesthesiology, Mayo Clinic, Rochester
| | - Ali Guy
- Clinical Instructor of Physical Medicine & Rehabilitation, New York University School of Medicine, NYU Medical Center, New York, NY, USA
| | - Fiona Bushati
- University of Medicine, Mother Theresa Hospital, Tirana
| | | | - Diana Hla
- Mayo Clinic Alix School of Medicine, Rochester, MN
| | | | - Samar Ikram
- Department of Neurological Surgery, Mayo Clinic, Rochester, MN, USA
| | - Essa A Mohamed
- Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN, USA
| | - Ibrahim A Bajwa
- FU Medical College, Foundation University, Islamabad, Pakistan
| | - Fareeha Nasir
- Department of Internal Medicine, Harlem Hospital Center, NY
| | - Juna Musa
- Department of Surgery, Mayo Clinic, Rochester, MN, USA
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Lu D, Mohamed EA, Covassin N, Chahal CAA, Mansukhani MP, St Louis EK, Somers VK. Frequency of sleep-disordered breathing in a referral population of Somali-Americans. J Clin Sleep Med 2021; 16:1343-1347. [PMID: 32367798 DOI: 10.5664/jcsm.8544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
STUDY OBJECTIVES To study the frequency of obstructive sleep apnea (OSA) in individuals of Somali ancestry referred to a clinical sleep laboratory. METHODS This was a retrospective study using a large registry of patients who underwent diagnostic polysomnography between 17 November 2009 and 15 April 2017. Adult patients self-reporting as being of Somali origin were confirmed using the electronic medical record. RESULTS Somali-American patients comprised approximately 0.2% of all patients undergoing polysomnography at the Mayo Clinic Center for Sleep Medicine. The median (interquartile range) age was 52.6 (35, 64) years with 66% males and a median (interquartile range) body mass index of 31.2 (27, 34) kg/m². OSA was diagnosed in 77% of patients, with approximately 50% having moderate to severe OSA. OSA was more frequent in older patients and similar between men and women, and only age predicted an OSA diagnosis while sex and body mass index did not. All patients with diabetes mellitus type 2 (n = 7) and all but one of the hypertensive patients (n = 11) had significant OSA. CONCLUSIONS Less than 0.2% of all patients undergoing polysomnography at Mayo Clinic were of Somali origin. Moderate-to-severe OSA was frequent in this select sample of individuals who underwent polysomnography. Hypertension and diabetes were present in most Somali-Americans with OSA. Given the rising prevalence of diabetes and hypertension in Somali-Americans, and the likely high prevalence of undiagnosed OSA, screening Somali-Americans for sleep disorders may contribute importantly to prevention, early detection, and reduction of cardiovascular and metabolic diseases in this population.
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Affiliation(s)
- Dongmei Lu
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.,Department of Respiratory and Critical Care Medicine, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Essa A Mohamed
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Naima Covassin
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - C Anwar A Chahal
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | | | - Erik K St Louis
- Center for Sleep Medicine, Mayo Clinic, Rochester, Minnesota.,Department of Neurology, Mayo Clinic, Rochester, Minnesota
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
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Li J, Somers VK, Gao X, Chen Z, Ju J, Lin Q, Mohamed EA, Karim S, Xu H, Zhang L. Evaluation of Optimal Diastolic Blood Pressure Range Among Adults With Treated Systolic Blood Pressure Less Than 130 mm Hg. JAMA Netw Open 2021; 4:e2037554. [PMID: 33595663 PMCID: PMC7890449 DOI: 10.1001/jamanetworkopen.2020.37554] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
IMPORTANCE Extremely low diastolic blood pressure has been reported to be associated with increased adverse cardiovascular events (ie, the diastolic J-shape phenomenon); however, current US guidelines recommend an intensive blood pressure target of less than 130/80 mm Hg without mentioning the lower limits of diastolic blood pressure. OBJECTIVES To evaluate whether there is a diastolic J-shape phenomenon for patients with an treated systolic blood pressure of less than 130 mm Hg and to explore the safe and optimal diastolic blood pressure ranges for this patient population. DESIGN, SETTING, AND PARTICIPANTS This cohort study analyzed outcome data of patients at high cardiovascular risk who were randomized to intensive or standard blood pressure control and achieved treated systolic blood pressure of less than 130 mm Hg in the Systolic Blood Pressure Intervention Trial (SPRINT) and Action to Control Cardiovascular Risk in Diabetes-Blood Pressure (ACCORD-BP) trial. Data were collected from October 2010 to August 2015 (SPRINT) and from September 1999 to June 2009 (ACCORD-BP). Data were analyzed from January to May 2020. EXPOSURE Treated diastolic blood pressure, divided in intervals of less than 60, 60 to less than 70, 70 to less than 80, and 80 mm Hg and greater. MAIN OUTCOMES AND MEASURES The primary outcome was a composite of all-cause death, nonfatal myocardial infarction, and nonfatal stroke. A composite cardiovascular outcome, including cardiovascular death, nonfatal myocardial infarction, and nonfatal stroke, was among the key secondary outcomes. RESULTS A total of 7515 patients (mean [SD] age, 65.6 [8.7] years; 4553 [60.6%] men) were included in this analysis. The nominally lowest risk was observed at a diastolic blood pressure between 70 and 80 mm Hg for the primary outcome, the composite cardiovascular outcome, nonfatal myocardial infarction, and cardiovascular death. A mean diastolic blood pressure of less than 60 mm Hg was associated with significantly increased risk of the primary outcome (hazard ratio [HR], 1.46; 95% CI, 1.13-1.90; P = .004), the composite cardiovascular outcome (HR, 1.74; 95% CI, 1.26-2.41; P = .001), nonfatal myocardial infarction (HR, 1.73; 95% CI, 1.15-2.59; P = .008), and nonfatal stroke (HR, 2.67; 95% CI, 1.26-5.63; P = .01). CONCLUSIONS AND RELEVANCE This cohort study found that lowering diastolic blood pressure to less than 60 mm Hg was associated with increased risk of cardiovascular events in patients with high cardiovascular risk and an treated systolic blood pressure less than 130 mm Hg. The finding that a diastolic blood pressure value between 70 and 80 mm Hg was an optimum target for this patient population merits further study.
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Affiliation(s)
- Jingen Li
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Virend K. Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Xiang Gao
- Internal Medicine Division, Tieying Hospital of Fengtai District, Beijing, China
| | - Zhuo Chen
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, National Clinical Research Center for Chinese Medicine Cardiology, Beijing, China
| | - Jianqing Ju
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, National Clinical Research Center for Chinese Medicine Cardiology, Beijing, China
| | - Qian Lin
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, National Clinical Research Center for Chinese Medicine Cardiology, Beijing, China
| | - Essa A. Mohamed
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Shahid Karim
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Hao Xu
- Cardiovascular Diseases Center, Xiyuan Hospital, China Academy of Chinese Medical Sciences, National Clinical Research Center for Chinese Medicine Cardiology, Beijing, China
| | - Lijing Zhang
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
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Li J, Covassin N, Bock JM, Mohamed EA, Pappoppula LP, Shafi C, Lopez-Jimenez F, Somers VK. Excessive Daytime Sleepiness and Cardiovascular Mortality in US Adults: A NHANES 2005-2008 Follow-Up Study. Nat Sci Sleep 2021; 13:1049-1059. [PMID: 34262376 PMCID: PMC8273750 DOI: 10.2147/nss.s319675] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/18/2021] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Excessive daytime sleepiness is highly prevalent and has been associated with increased risk of cardiovascular diseases, but evidence for its association with cardiovascular mortality is limited and inconsistent. We aimed to determine whether excessive daytime sleepiness is independently associated with cardiovascular mortality in general adult population. PATIENTS AND METHODS A prospective study of 10,330 adult participants (aged ≥20 years) from National Health and Nutrition Examination Survey (NHANES) 2005-2006 and 2007-2008 was followed up until December 31st, 2015. Excessive daytime sleepiness was defined as the self-reported feeling of being overly sleepy often or always during the day. Cox proportional hazard ratios (HRs) with 95% confidence interval (CI) were estimated to assess risk for cardiovascular mortality. RESULTS A total of 10,330 participants with mean age of 47.3 years (95% CI, 46.0 to 48.1) were included in this analysis. Approximately, 18.5% of US adults reported excessive daytime sleepiness. Over a mean follow-up of 8.3 years, 262 cardiovascular deaths occurred. Participants with excessive daytime sleepiness had 2.85-times greater risk (95% CI, 1.33-6.09) of cardiovascular death than those without daytime sleepiness in multivariable analysis corrected for sociodemographic factors, comorbidities and cardiovascular risk factors including depression. Further adjustment for self-reported sleep disorders and sleep duration only slightly attenuated this association (HR, 2.55; 95% CI, 1.23-5.27). No interactions between excessive daytime sleepiness and age, sex or cardiovascular disease at study entry were observed (all Ps>0.05). CONCLUSION Excessive daytime sleepiness is highly prevalent among US adults and is independently associated with an approximately two-and-a-half-fold increased risk of cardiovascular mortality in a large national sample. Screening for excessive daytime sleepiness may be a simple and cost-effective tool for identifying individuals at high risk of cardiovascular death.
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Affiliation(s)
- Jingen Li
- Department of Cardiovascular Medicine, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, People's Republic of China.,Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
| | - Naima Covassin
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
| | - Joshua M Bock
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
| | - Essa A Mohamed
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
| | | | - Chilsia Shafi
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
| | | | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, USA
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Li J, Gao X, Hao X, Kantas D, Mohamed EA, Zheng X, Xu H, Zhang L. Yoga for secondary prevention of coronary heart disease: A systematic review and meta-analysis. Complement Ther Med 2020; 57:102643. [PMID: 33338581 DOI: 10.1016/j.ctim.2020.102643] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/15/2020] [Accepted: 12/07/2020] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Yoga has been widely practiced and has recently shown benefits in patients with coronary heart disease (CHD), however, evidence is inconsistent. METHODS We conducted a systematic review and meta-analysis by searching PubMed/Medline, the Cochrane Central Register of Controlled Trials (CENTRAL), EMBASE and Web of Science from inception to May 31, 2020 for randomised controlled trials (RCTs) comparing yoga with usual care or non-pharmacological interventions in patients with CHD. The primary outcomes were all-cause mortality and health related quality of life (HR-QoL). Secondary outcomes were a composite cardiovascular outcome, exercise capacity and cardiovascular risk factors (blood pressure, lipid profiles and body mass index). RESULTS Seven RCTs with a total of 4671 participants were included. Six RCTs compared yoga with usual care and one compared yoga with designed exercise. The mean age of the participants ranged from 51.0-60.7 years and the majority of them were men (85.4 %). Pooled results showed that compared with usual care, yoga had no effect on all-cause mortality (RR, 1.02; 95 % CI, 0.75-1.39), but it significantly improved HR-QoL (SMD, 0.07; 95 % CI, 0.01 - 0.14). A non-significant reduction of the composite cardiovascular outcome was observed (133 vs. 154; RR, 0.63; 95 % CI, 0.15-2.59). Serum level of triglyceride and high density lipoprotein cholesterol, blood pressure and body mass index were also significantly improved. The study comparing yoga with control exercise also reported significantly better effects of yoga on HR-QoL (85.75 vs. 75.24, P < 0.001). No severe adverse events related to yoga were reported. CONCLUSIONS Yoga might be a promising alternative for patients with CHD as it is associated with improved quality of life, less number of composite cardiovascular events, and improved cardiovascular risk factors.
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Affiliation(s)
- Jingen Li
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China; Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, United States
| | - Xiang Gao
- Internal Medicine Division, Tieying Hospital of Fengtai District, Beijing, 100078, China
| | - Xuezeng Hao
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China
| | - Dimitrios Kantas
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, United States
| | - Essa A Mohamed
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, 55902, United States
| | - Xiangying Zheng
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China
| | - Hao Xu
- Cardiovascular Diseases Centre, Xiyuan Hospital, China Academy of Chinese Medical Sciences, National Clinical Research Centre for Chinese Medicine Cardiology, Beijing, 100091, China.
| | - Lijing Zhang
- Department of Cardiology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
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Wongjarupong N, Yonli AT, Nagalo BM, Djigma FW, Somda SK, Hassan MA, Mohamed EA, Sorgho AP, Compaore TR, Soubeiga ST, Kiendrebeogo I, Sanou M, Diarra B, Yang H, Chen C, Ouattara AK, Zohoncon TM, Martinson JJ, Buetow K, Chamcheu JC, Antwi SO, Borad MJ, Simpore J, Roberts LR. Characteristics of Patients With Chronic Hepatitis B Virus Infection With Genotype E Predominance in Burkina Faso. Hepatol Commun 2020; 4:1781-1792. [PMID: 33305149 PMCID: PMC7706297 DOI: 10.1002/hep4.1595] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 12/14/2022] Open
Abstract
Hepatitis B virus (HBV) genotype E (HBV-E) accounts for the majority of chronic hepatitis B (CHB) infections in West Africa. We aimed to determine factors associated with HBV-E-induced hepatocellular carcinoma (HCC) in West Africa. Data on patients from Burkina Faso who were hepatitis B surface antigen positive (HBsAg+) and had CHB were analyzed. HBV viral load and hepatitis B e antigen (HBeAg) status were measured in 3,885 individuals with CHB without HCC (CHB HCC-) and 59 individuals with CHB with HCC (CHB HCC+). HBV genotyping was performed for 364 subjects with CHB HCC- and 41 subjects with CHB HCC+. Overall, 2.5% of the CHB HCC- group was HBeAg+ compared with 0% of the CHB HCC+ group. Of the 364 patients who were CHB HCC- with available genotyping, the frequencies of HBV genotypes E and C/E were 70.3% and 12.9%, respectively. Age (odds ratio [OR] for older age, 1.08; 95% confidence interval [CI], 1.06-1.10 per 1-year increase in age), male sex (OR, 2.03; 95% CI, 1.11-3.69), and HBV viremia (OR, 1.48; 95% CI, 1.31-1.67 per 1 log10 IU/mL) were each associated with HCC diagnosis. Patients with genotype E had a lower HBeAg prevalence (6.3% vs. 14.9%), lower HBV viral load, and higher prevalence of cirrhosis (14.5% vs. 4.8%) than patients with genotype C/E. Conclusion: HBV-E is the most common circulating strain (70.3%) in West African patients. HCC was associated with older age, male sex, and high HBV viral load. It is expected that these results will further inform guidance on clinical management of HBV infection in West Africa.
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Affiliation(s)
| | - Albert Theophane Yonli
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | | | - Florencia Wendkuuni Djigma
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Sosthene Kounpielime Somda
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | | | - Essa A. Mohamed
- Division of Gastroenterology and HepatologyMayo ClinicRochesterMN
| | - Abel Pegdwende Sorgho
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Tegwinde Rebeca Compaore
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Serge Theophile Soubeiga
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Isabelle Kiendrebeogo
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Mahamoudou Sanou
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Birama Diarra
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Hwai‐I Yang
- Genomics Research CenterAcademia SinicaTaipeiTaiwan
| | | | - Abdoul K. Ouattara
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Théodora M. Zohoncon
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Jeremy J. Martinson
- Division of Infectious Diseases and MicrobiologyUniversity of PittsburghPittsburghPA
| | - Kenneth Buetow
- Computational Sciences and Informatics Program for Complex Adaptive SystemArizona State UniversityTempeAZ
| | | | - Samuel O. Antwi
- Department of Health Sciences ResearchMayo ClinicJacksonvilleFL
| | - Mitesh J. Borad
- Division of Hematology and Medical OncologyMayo Clinic HospitalPhoenixAZ
| | - Jacques Simpore
- Department of Biochemistry and MicrobiologyPietro Annigonni Biomolecular Research CenterOuagadougouBurkina FasoWest Africa
| | - Lewis R. Roberts
- Division of Gastroenterology and HepatologyMayo ClinicRochesterMN
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10
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Abstract
This diagnostic study investigates whether there are clinically significant differences between Snellen visual acuity examinations performed by a human vs a smart speaker.
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Affiliation(s)
- Haroon O. Ismail
- Department of Ophthalmology, Howard University College of Medicine, Washington, DC
| | - Akini R. Moses
- Department of Ophthalmology, Howard University College of Medicine, Washington, DC
| | - Matthew Tadrus
- Department of Ophthalmology, Howard University College of Medicine, Washington, DC
| | - Essa A. Mohamed
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Leslie S. Jones
- Department of Ophthalmology, Howard University College of Medicine, Washington, DC
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11
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Mohamed EA, Giama NH, Shaleh HM, Kerandi L, Oseini AM, Ahmed Mohammed H, Kerandi H, Allotey LK, Waaeys IA, Ali HA, Ali HM, Mohamed SA, Yang JD, Gaga WO, Tamire LL, Windissa A, Patten CA, Balls-Berry JE, Roberts LR. Knowledge, Attitudes, and Behaviors of Viral Hepatitis Among Recent African Immigrants in the United States: A Community Based Participatory Research Qualitative Study. Front Public Health 2020; 8:25. [PMID: 32211358 PMCID: PMC7067746 DOI: 10.3389/fpubh.2020.00025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 01/27/2020] [Indexed: 12/13/2022] Open
Abstract
Background: In the United States, hepatocellular carcinoma is the ninth leading cause of cancer mortality. Hepatocellular carcinoma disproportionately affects individuals of African ancestry with the rates being higher amongst individuals of foreign-born African ancestry. This study explored knowledge, attitudes, and behaviors toward viral hepatitis transmission, screening, and vaccination among recent African immigrants in Minnesota and identify ways to improve early detection and screening methods. Methods: A community based participatory research (CBPR) team with minority researchers and community members sought to gain insight on persons of African Ancestry knowledge, attitudes, and behaviors related to viral hepatitis by conducting a qualitative research study. The CBPR team developed a focus group moderator's guide with semi-structured questions related to transmission, screening, and vaccination of viral hepatitis. We conducted seven focus groups using bilingual, bicultural moderators with participants from local Ethiopian, Liberian and Kenyan communities from August 10th, 2014 to October 11th, 2014. Focus groups were audio recorded and transcribed. The CBPR team categorized the data into themes and subthemes with consensus using traditional content analysis. Results: Community partners recruited 63 participants with a majority identifying as male (51%). Participants lacked knowledge of viral hepatitis screening, vaccination, and treatment. Participants were aware of some behaviors that increased risk of acquisition of hepatitis. Participants endorsed a strategy of developing and delivering educational materials for African immigrants. Moreover, access to care and cultural awareness were mentioned as pivotal for prevention and treatment of viral hepatitis. Conclusions: Findings from this pilot study provide insight on areas of research focus. Having a research team consisting of members from the community helped to increase trust and foster an understanding of shared community values. Information from this study provides evidence to support the development culturally appropriate strategies to address disparities in viral hepatitis in these communities.
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Affiliation(s)
- Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Nasra H Giama
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Hassan M Shaleh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Linda Kerandi
- Urgent Care and Clinic, Midpoint Medical Clinic, Brooklyn Park, MN, United States
| | - Abdul M Oseini
- Division of Gastroenterology, Virginia Commonwealth University, Richmond, VA, United States
| | - Hager Ahmed Mohammed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Henry Kerandi
- Urgent Care and Clinic, Midpoint Medical Clinic, Brooklyn Park, MN, United States
| | - Loretta K Allotey
- Medical School, University of Minnesota, Rochester, MN, United States
| | | | - Hamdi A Ali
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Hawa M Ali
- Medical School, University of Minnesota, Rochester, MN, United States
| | | | - Ju Dong Yang
- Transplant Hepatology, Cedars-Sinai Medical Center, Los Angeles, CA, United States
| | - Wudneh O Gaga
- St. George Ethiopian Tewahido Orthodox Church, Rochester, MN, United States
| | - Lily L Tamire
- St. George Ethiopian Tewahido Orthodox Church, Rochester, MN, United States
| | - Awol Windissa
- Pillsbury United Communities, Minneapolis, MN, United States
| | - Christi A Patten
- Behavioral Health Research Program, Mayo Clinic, Rochester, MN, United States
| | | | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
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12
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Lu D, St Louis EK, Chahal CA, Covassin N, Mohamed EA, Mansukhani MP, Xie J, Lipford MC, Li N, Ramar K, Caples SM, Gay PC, Olson EJ, Morgenthaler TI, Somers VK. Sleepiness and Mortality Risk in Patients without Sleep Apnea. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.834.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | | | - Jiang Xie
- Beijing An Zhen Hospital, Capital Medical UniversityBeijingPeople's Republic of China
| | | | - Nanfang Li
- People's Hospital of Xinjiang Uygur Autonomous ReginUrumqiPeople's Republic of China
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13
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Dawood AF, Sabry MM, Estaphan SA, Mohamed EA, Younes SF, Rashed LA, Elzainy AW. Cross-talk between apelin and vasopressin in response to different osmotic stimuli in type 2 diabetic rats. J BIOL REG HOMEOS AG 2018; 32:1117-1127. [PMID: 30334404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Apelin, a peptide hormone that has been linked to insulin resistance, obesity and glucose metabolism, coexists with arginine vasopressin (AVP) in hypothalamic magnocellular neurons that control body fluid homeostasis. The significant correlation between serum glucose and serum osmolarity in uncontrolled DM indicates the need for adequate compensation, but how apelin and AVP contribute to this is still unsettled. This study aims to investigate the interaction between apelin and AVP in osmotic regulation in type 2 diabetes mellitus (T2DM), and to explore the underlying mechanism. Forty-eight adult male albino rats were divided into six groups: control (isotonic, ip 0.9% NaCl; hypotonic, ip distilled water; hypertonic, ip 2% NaCl) groups and T2DM (isotonic, hypotonic, hypertonic) groups. Serum levels of AVP, apelin, Na, glucose, serum and urine osmolarity were measured; kidney samples were taken for Aquaporin 2 channels (AQP2) and epithelial sodium channel gamma subunit (ENaCγ) gene expression. Hypothalamic tissue sections were used for immunohistochemical staining of apelin and AVP. Both in control and diabetic groups serum apelin, showed a significant negative correlation with serum AVP (r=-0.533, p≤ 0.001). Serum apelin and AVP were inversely proportional to their hypothalamic protein expression. Serum apelin and AVP were significantly higher in diabetic rats (P= 0.001) yet their percentage change in response to hypo and hyper-osmotic stimuli (1.5±0.7, -0.34±0.15 and -0.38±0.13, 1.95±0.36, respectively) was less pronounced when compared to control rats (3.28±0.52, -0.59±0.12 and -0.45±0.13, 2.58±0.93, respectively). Na and ENaCγ levels significantly increased in hypertonic rats, while AQP2 gene expression significantly increased in hypotonic rats. Both apelin and AVP reacted to osmotic stimuli in T2DM but with less sensitivity than in control rats. In spite of its abnormal increased levels in diabetic rats, apelin maintained its role through counteracting AVP action.
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Affiliation(s)
- A F Dawood
- Physiology Department, Faculty of Medicine, Cairo University, Egypt
- Department of Basic Medical Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University, Kingdom of Saudi Arabia
| | - M M Sabry
- Physiology Department, Faculty of Medicine, Cairo University, Egypt
| | - S A Estaphan
- Physiology Department, Faculty of Medicine, Cairo University, Egypt
| | - E A Mohamed
- Anatomy Department, Faculty of Medicine, Cairo University, Egypt
| | - S F Younes
- Department of Basic Medical Sciences, College of Medicine, Princess Nourah Bint Abdulrahman University, Kingdom of Saudi Arabia
- Department of Pathology, Faculty of Medicine, Menoufia University, Egypt
| | - L A Rashed
- Biochemistry department, Faculty of Medicine, Cairo University, Egypt
| | - A W Elzainy
- Anatomy Department, Faculty of Medicine, Cairo University, Egypt
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14
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Wongjarupong N, Negron-Ocasio GM, Chaiteerakij R, Addissie BD, Mohamed EA, Mara KC, Harmsen WS, Theobald JP, Peters BE, Balsanek JG, Ward MM, Giama NH, Venkatesh SK, Harnois DM, Charlton MR, Yamada H, Algeciras-Schimnich A, Snyder MR, Therneau TM, Roberts LR. Model combining pre-transplant tumor biomarkers and tumor size shows more utility in predicting hepatocellular carcinoma recurrence and survival than the BALAD models. World J Gastroenterol 2018; 24:1321-1331. [PMID: 29599607 PMCID: PMC5871827 DOI: 10.3748/wjg.v24.i12.1321] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Revised: 03/16/2018] [Accepted: 03/18/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To assess the performance of BALAD, BALAD-2 and their component biomarkers in predicting outcome of hepatocellular carcinoma (HCC) patients after liver transplant.
METHODS BALAD score and BALAD-2 class are derived from bilirubin, albumin, alpha-fetoprotein (AFP), Lens culinaris agglutinin-reactive AFP (AFP-L3), and des-gamma-carboxyprothrombin (DCP). Pre-transplant AFP, AFP-L3 and DCP were measured in 113 patients transplanted for HCC from 2000 to 2008. Hazard ratios (HR) for recurrence and death were calculated. Univariate and multivariate regression analyses were conducted. C-statistics were used to compare biomarker-based to predictive models.
RESULTS During a median follow-up of 12.2 years, 38 patients recurred and 87 died. The HRs for recurrence in patients with elevated AFP, AFP-L3, and DCP defined by BALAD cut-off values were 2.42 (1.18-5.00), 1.86 (0.98-3.52), and 2.83 (1.42-5.61), respectively. For BALAD, the HRs for recurrence and death per unit increased score were 1.48 (1.15-1.91) and 1.59 (1.28-1.97). For BALAD-2, the HRs for recurrence and death per unit increased class were 1.45 (1.06-1.98) and 1.38 (1.09-1.76). For recurrence prediction, the combination of three biomarkers had the highest c-statistic of 0.66 vs. 0.64, 0.61, 0.53, and 0.53 for BALAD, BALAD-2, Milan, and UCSF, respectively. Similarly, for death prediction, the combination of three biomarkers had the highest c-statistic of 0.66 vs 0.65, 0.61, 0.52, and 0.50 for BALAD, BALAD-2, Milan, and UCSF. A new model combining biomarkers with tumor size at the time of transplant (S-LAD) demonstrated the highest predictive capability with c-statistics of 0.71 and 0.69 for recurrence and death.
CONCLUSION BALAD and BALAD-2 are valid in transplant HCC patients, but less predictive than the three biomarkers in combination or the three biomarkers in combination with maximal tumor diameter (S-LAD).
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Affiliation(s)
- Nicha Wongjarupong
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10400, Thailand
| | - Gabriela M Negron-Ocasio
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
- University of Puerto Rico Medical Sciences Campus, San Juan 00921, Puerto Rico
| | - Roongruedee Chaiteerakij
- Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10400, Thailand
| | - Benyam D Addissie
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Kristin C Mara
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN 55905, United States
| | - William S Harmsen
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN 55905, United States
| | - J Paul Theobald
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Brian E Peters
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Joseph G Balsanek
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Melissa M Ward
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Nasra H Giama
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Sudhakar K Venkatesh
- Department of Radiology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Denise M Harnois
- Department of Transplantation, Mayo Clinic Florida, Jacksonville, FL 32224, United States
| | - Michael R Charlton
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
| | - Hiroyuki Yamada
- Wako Life Sciences, Incorporated, Mountain View, CA 94043, United States
| | - Alicia Algeciras-Schimnich
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Melissa R Snyder
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN 55905, United States
| | - Terry M Therneau
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN 55905, United States
| | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN 55905, United States
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15
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Zaki SM, Mohamed EA, Motawie AG, Abdel Fattah S. N-acetylcysteine versus progesterone on the cisplatin-induced peripheral neurotoxicity. Folia Morphol (Warsz) 2017; 77:234-245. [PMID: 29064553 DOI: 10.5603/fm.a2017.0090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/16/2017] [Accepted: 09/17/2017] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cisplatin-induced peripheral nerve neurotoxicity (CIPN) is the main obstacle in cisplatin treatment. The aim of this study was to compare the modulatory effects of N-acetylcysteine (NAC) and progesterone on CIPN, because there are scarce literature data on the protective effect of the proge-sterone on the CIPN. MATERIALS AND METHODS Twenty-four rats were divided into four groups: control, cisplatin-treated, concomitant cisplatin-treated and NAC-treated, and concomitant cisplatin-treated and progesterone-treated. Electron microscopic, immunohistochemical, real time polymerase chain reaction and histomorphome-tric analysis; oxidative/antioxidative markers (MDA/GSH and SOD), neurotoxic/ neuroprotective markers (iNOS/nNOS), inflammatory mediators (TNF-a and NF-kB) and BAX were done. RESULTS The myelin sheath in the cisplatin-treated group elucidated infolding. The myelin was disfigured, degenerated, and extensively split with areas of focal loss. The axoplasm was atrophic. Ballooning and vacuolations of the mitochon-dria with alterations of Remak bundles structures were observed. Fewer of these changes were noted in the NAC and progesterone-treated groups. Decrease of the antioxidant SOD and GSH (81% and 64%) and increase of the oxidant MDA (9 folds), increment of the neurotoxic iNOS (1.9 folds) and decrement of the neuroprotective nNOS (64%) and elevation of the inflammatory mediators' TNF-a and NF-kB (8.3 and 11 folds) in the cisplatin-treated group. Increase of the antioxidant SOD (1.3 and 2.5 folds) and GSH (120% and 79%) and decrease of the oxidant MDA (69% and 88%), decrement of the neurotoxic iNOS (56% and 68%) and increment of the neuroprotective nNOS (1.6 and one folds) and elevation of the inflammatory mediators' TNF-a and NF-kB were observed in the NAC and progesterone-treated groups, respectively. CONCLUSIONS The toxic effect of CIPN might be attributed to either oxidative or severe inflammatory stress. Progesterone is efficient in ameliorating these effects; however, NAC is better. (Folia Morphol 2018; 77, 2: 234-245).
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Affiliation(s)
| | | | | | - S Abdel Fattah
- Anatomy and Embryology Department, Faculty of Medicine, Cairo University, Egypt, Egypt.
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16
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Chahal AA, Alhurani RE, Mohamed EA, Somers VK, Miller VM, Murad MH, Ahmed AT. Are there sex differences following treatment of left ventricular outflow tract obstruction in adults with hypertrophic cardiomyopathy? Eur Heart J Qual Care Clin Outcomes 2017; 3:249-250. [PMID: 28838090 PMCID: PMC5805115 DOI: 10.1093/ehjqcco/qcx005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anwar A. Chahal
- Department of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW,
Rochester, MN 55905, USA
- Mayo Graduate School, 200 First Street SW, Rochester, MN 55905, USA
- Specialty Registrar, Cardiology and Internal Medicine, London Deanery,
University College London Partners, UK
| | - Rabe E. Alhurani
- Department of Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN
55905, USA
- Mayo Clinic Graduate School of Medicine, 200 First Street SW, Rochester, MN
55905, USA
| | - Essa A. Mohamed
- Mayo Graduate School, 200 First Street SW, Rochester, MN 55905, USA
| | - Virend K. Somers
- Department of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW,
Rochester, MN 55905, USA
| | - Virginia M. Miller
- Departments of Surgery and Physiology and Biomedical Engineering, Mayo
Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Mohammad Hassan Murad
- Evidence-based Practice Center, Mayo Clinic Robert D. and Patricia E. Kern
Center for the Science of Health Care Delivery, Division of Preventive, Occupational and
Aerospace Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
| | - Ahmed T. Ahmed
- Mayo Clinic Graduate School of Medicine, 200 First Street SW, Rochester, MN
55905, USA
- Department of Psychiatry & Psychology, Mayo Clinic, 200 First Street SW,
MN 55905, USA
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17
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Marcano-Bonilla L, Mohamed EA, Mounajjed T, Roberts LR. Biliary tract cancers: epidemiology, molecular pathogenesis and genetic risk associations. Chin Clin Oncol 2017; 5:61. [PMID: 27829275 DOI: 10.21037/cco.2016.10.09] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 10/17/2016] [Indexed: 12/21/2022]
Abstract
Biliary tract cancers (BTC) are malignancies that arise from the epithelium of the biliary system and comprise the second most common type of hepatobiliary cancer worldwide. BTC are sub-classified as intrahepatic cholangiocarcinoma (iCCA), perhilar/hilar cholangiocarcinoma (pCCA), distal cholangiocarcinoma (dCCA), and gallbladder carcinoma. Due to the differences in their etiologic risk factors, pathogenesis, and molecular and genetic characteristics, each of these subtypes is considered a separate biological entity. The geographic diversity of risk factors for the subtypes of biliary cancers results in profound differences in the worldwide incidence of each. In this article we provide a review of the current epidemiology of BTC and their associated risk factors. Further, we discuss the available evidence for genetic predisposition to BTC and anticipate the results of planned large-scale, genome-wide association studies (GWAS) exploring the inherited sequence variants conferring risk of BTC. These studies may also potentially of reveal important pathogenic mechanisms of the biliary tract cancer subtypes.
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Affiliation(s)
- Lorena Marcano-Bonilla
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA; Mayo Graduate School, Mayo Clinic, Rochester, MN, USA; Center for Clinical and Translational Science, Mayo Clinic, Rochester, MN, USA; University of Puerto Rico School of Medicine, San Juan, Puerto Rico
| | - Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA; Mayo Graduate School, Mayo Clinic, Rochester, MN, USA; Center for Clinical and Translational Science, Mayo Clinic, Rochester, MN, USA
| | - Taofic Mounajjed
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA; Center for Clinical and Translational Science, Mayo Clinic, Rochester, MN, USA.
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18
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Mohamed EA, Giama NH, Shaleh HM, Oseini AM, Mohammed HA, Cvinar J, Waaeys IA, Ali HA, Allotey LK, Roberts LR. Abstract C76: Community-wide outreach and screening to reduce hepatitis B, hepatitis C and liver cancer disparities among African immigrants in Minnesota. Cancer Epidemiol Biomarkers Prev 2017. [DOI: 10.1158/1538-7755.disp16-c76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background: In Minnesota, the 2012 Cancer Report by the Department of Health reported both the incidence of liver cancer and mortality rates due to liver cancer among Blacks were significantly higher than Caucasians. African immigration to Minnesota is the third highest by percentage of state population in the US. Given that viral hepatitis disproportionately affects sub-Saharan Africans and that these individuals are emigrating from countries where childhood HBV vaccination has only recently been implemented on a national scale, we speculate that this unique immigrant community may be a major contributor to the increased burden of viral hepatitis and liver cancer complications in the state. Limited research exists on the burden of viral hepatitis and hepatocellular carcinoma among African immigrants. Thus, we conducted a prospective community-wide screening to assess the rates of chronic HBV and HCV infections among Somali, Liberian and Kenyan immigrants in Minnesota.
Methods: Several African community health centers and organizations in Minnesota were selected for the study. Individuals of Somali, Liberian or Kenyan descent were enrolled in a prospective screening study for chronic HBV and HCV infection. Blood samples were collected and tested for hepatitis B surface antigen (HBsAg), hepatitis B core antibody (HBcAb), hepatitis B surface antibody (HBsAb), and anti-hepatitis C virus antibody (anti-HCV). Follow-up testing, health education, counseling, and referral were provided to participants.
Results: 853 participants provided blood specimens. 13.5% of participants had chronic HBV infection while 32.4% had prior HBV exposure with spontaneous viral clearance. 7% of participants had chronic HCV infection. Follow up and linkage to care were provided to participants with chronic hepatitis while preventive advice was provided to those who were negative for both infections. In particular, participants susceptible to HBV were informed about the availability of HBV vaccine in order to protect against future HBV infection.
Conclusions: Chronic HBV and HCV are major health problems among recent African immigrants in Minnesota. Community-based screening is an effective way to identify and provide health education and linkage to care for individuals with or at risk for viral hepatitis.
Citation Format: Essa A. Mohamed, Nasra H. Giama, Hassan M. Shaleh, Abdul M. Oseini, Hager Ahmed Mohammed, Jessica Cvinar, Ibrahim A. Waaeys, Hamdi A. Ali, Loretta K. Allotey, Lewis R. Roberts. Community-wide outreach and screening to reduce hepatitis B, hepatitis C and liver cancer disparities among African immigrants in Minnesota. [abstract]. In: Proceedings of the Ninth AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2016 Sep 25-28; Fort Lauderdale, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2017;26(2 Suppl):Abstract nr C76.
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Yang JD, Mohamed EA, Aziz AOA, Shousha HI, Hashem MB, Nabeel MM, Abdelmaksoud AH, Elbaz TM, Afihene MY, Duduyemi BM, Ayawin JP, Gyedu A, Lohouès-Kouacou MJ, Ndam AWN, Moustafa EF, Hassany SM, Moussa AM, Ugiagbe RA, Omuemu CE, Anthony R, Palmer D, Nyanga AF, Malu AO, Obekpa S, Abdo AE, Siddig AI, Mudawi HMY, Okonkwo U, Kooffreh-Ada M, Awuku YA, Nartey YA, Abbew ET, Awuku NA, Otegbayo JA, Akande KO, Desalegn HM, Omonisi AE, Ajayi AO, Okeke EN, Duguru MJ, Davwar PM, Okorie MC, Mustapha S, Debes JD, Ocama P, Lesi OA, Odeghe E, Bello R, Onyekwere C, Ekere F, Igetei R, Mah'moud MA, Addissie B, Ali HM, Gores GJ, Topazian MD, Roberts LR. Characteristics, management, and outcomes of patients with hepatocellular carcinoma in Africa: a multicountry observational study from the Africa Liver Cancer Consortium. Lancet Gastroenterol Hepatol 2016; 2:103-111. [PMID: 28403980 DOI: 10.1016/s2468-1253(16)30161-3] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/29/2016] [Accepted: 09/30/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Hepatocellular carcinoma is a leading cause of cancer-related death in Africa, but there is still no comprehensive description of the current status of its epidemiology in Africa. We therefore initiated an African hepatocellular carcinoma consortium aiming to describe the clinical presentation, management, and outcomes of patients with hepatocellular carcinoma in Africa. METHODS We did a multicentre, multicountry, retrospective observational cohort study, inviting investigators from the African Network for Gastrointestinal and Liver Diseases to participate in the consortium to develop hepatocellular carcinoma research databases and biospecimen repositories. Participating institutions were from Cameroon, Egypt, Ethiopia, Ghana, Ivory Coast, Nigeria, Sudan, Tanzania, and Uganda. Clinical information-demographic characteristics, cause of disease, liver-related blood tests, tumour characteristics, treatments, last follow-up date, and survival status-for patients diagnosed with hepatocellular carcinoma between Aug 1, 2006, and April 1, 2016, were extracted from medical records by participating investigators. Because patients from Egypt showed differences in characteristics compared with patients from the other countries, we divided patients into two groups for analysis; Egypt versus other African countries. We undertook a multifactorial analysis using the Cox proportional hazards model to identify factors affecting survival (assessed from the time of diagnosis to last known follow-up or death). FINDINGS We obtained information for 2566 patients at 21 tertiary referral centres (two in Egypt, nine in Nigeria, four in Ghana, and one each in the Ivory Coast, Cameroon, Sudan, Ethiopia, Tanzania, and Uganda). 1251 patients were from Egypt and 1315 were from the other African countries (491 from Ghana, 363 from Nigeria, 277 from Ivory Coast, 59 from Cameroon, 51 from Sudan, 33 from Ethiopia, 21 from Tanzania, and 20 from Uganda). The median age at which hepatocellular carcinoma was diagnosed significantly later in Egypt than the other African countries (58 years [IQR 53-63] vs 46 years [36-58]; p<0·0001). Hepatitis C virus was the leading cause of hepatocellular carcinoma in Egypt (1054 [84%] of 1251 patients), and hepatitis B virus was the leading cause in the other African countries (597 [55%] of 1082 patients). Substantially fewer patients received treatment specifically for hepatocellular carcinoma in the other African countries than in Egypt (43 [3%] of 1315 vs 956 [76%] of 1251; p<0·0001). Among patients with survival information (605 [48%] of 1251 in Egypt and 583 [44%] of 1315 in other African countries), median survival was shorter in the other African countries than in Egypt (2·5 months [95% CI 2·0-3·1] vs 10·9 months [9·6-12·0]; p<0·0001). Factors independently associated with poor survival were: being from an African countries other than Egypt (hazard ratio [HR] 1·59 [95% CI 1·13-2·20]; p=0·01), hepatic encephalopathy (2·81 [1·72-4·42]; p=0·0004), diameter of the largest tumour (1·07 per cm increase [1·04-1·11]; p<0·0001), log α-fetoprotein (1·10 per unit increase [1·02-1·20]; p=0·0188), Eastern Cooperative Oncology Group performance status 3-4 (2·92 [2·13-3·93]; p<0·0001) and no treatment (1·79 [1·44-2·22]; p<0·0001). INTERPRETATION Characteristics of hepatocellular carcinoma differ between Egypt and other African countries. The proportion of patients receiving specific treatment in other African countries was low and their outcomes were extremely poor. Urgent efforts are needed to develop health policy strategies to decrease the burden of hepatocellular carcinoma in Africa. FUNDING None.
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Affiliation(s)
- Ju Dong Yang
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Ashraf O Abdel Aziz
- Endemic Medicine and Hepatogastroenterology Department, University of Cairo, Cairo, Egypt
| | - Hend I Shousha
- Endemic Medicine and Hepatogastroenterology Department, University of Cairo, Cairo, Egypt
| | - Mohamed B Hashem
- Endemic Medicine and Hepatogastroenterology Department, University of Cairo, Cairo, Egypt
| | - Mohamed M Nabeel
- Endemic Medicine and Hepatogastroenterology Department, University of Cairo, Cairo, Egypt
| | - Ahmed H Abdelmaksoud
- Department of Diagnostic and Interventional Radiology, University of Cairo, Cairo, Egypt
| | - Tamer M Elbaz
- Endemic Medicine and Hepatogastroenterology Department, University of Cairo, Cairo, Egypt
| | - Mary Y Afihene
- Department of Internal Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Babatunde M Duduyemi
- Department of Pathology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Joshua P Ayawin
- Department of Internal Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Adam Gyedu
- Department of Surgery, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Marie-Jeanne Lohouès-Kouacou
- Department of Hepatology and Gastroenterology, Centre Hospitalier Universitaire de Cocody, Abidjan, Côte d'Ivoire
| | - Antonin W Ndjitoyap Ndam
- Department of Hepatology and Gastroenterology, Centre Hospitalier Universitaire de Cocody, Abidjan, Côte d'Ivoire
| | - Ehab F Moustafa
- Department of Tropical Medicine and Gastroenterology, Assiut University Hospital, Assiut Governorate, Egypt
| | - Sahar M Hassany
- Department of Tropical Medicine and Gastroenterology, Assiut University Hospital, Assiut Governorate, Egypt
| | - Abdelmajeed M Moussa
- Department of Tropical Medicine and Gastroenterology, Assiut University Hospital, Assiut Governorate, Egypt
| | - Rose A Ugiagbe
- Department of Medicine, University of Benin Teaching Hospital, Benin City, Nigeria
| | - Casimir E Omuemu
- Department of Medicine, University of Benin Teaching Hospital, Benin City, Nigeria
| | - Richard Anthony
- Department of Internal Medicine, Effia Nkwanta Regional Hospital, Sekondi, Ghana
| | - Dennis Palmer
- Department of Internal Medicine, Mbingo Baptist Hospital, Bamenda, Cameroon
| | - Albert F Nyanga
- Department of Internal Medicine, Mbingo Baptist Hospital, Bamenda, Cameroon
| | - Abraham O Malu
- Department of Medicine, Benue State University Teaching Hospital, Benue, Nigeria
| | - Solomon Obekpa
- Department of Medicine, Benue State University Teaching Hospital, Benue, Nigeria
| | | | | | - Hatim M Y Mudawi
- Department of Internal Medicine, University of Khartoum, Khartoum, Sudan
| | - Uchenna Okonkwo
- Department of Internal Medicine, University of Calabar Teaching Hospital, Calabar, Nigeria
| | - Mbang Kooffreh-Ada
- Department of Internal Medicine, University of Calabar Teaching Hospital, Calabar, Nigeria
| | - Yaw A Awuku
- Department of Internal Medicine, School of Medical Sciences, Cape Coast, Ghana
| | - Yvonne A Nartey
- Department of Internal Medicine, School of Medical Sciences, Cape Coast, Ghana
| | - Elizabeth T Abbew
- Department of Internal Medicine, School of Medical Sciences, Cape Coast, Ghana
| | - Nana A Awuku
- Department of Internal Medicine, School of Medical Sciences, Cape Coast, Ghana
| | | | | | - Hailemichael M Desalegn
- Department of Internal Medicine, St. Paul's Hospital Millenium Medical College, Addis Ababa, Ethiopia
| | - Abidemi E Omonisi
- Department of Medicine, Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria
| | - Akande O Ajayi
- Department of Medicine, Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria
| | - Edith N Okeke
- Department of Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
| | - Mary J Duguru
- Department of Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
| | - Pantong M Davwar
- Department of Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
| | - Michael C Okorie
- Department of Medicine, University of Jos/Jos University Teaching Hospital, Jos, Nigeria
| | - Shettima Mustapha
- Department of Medicine, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria
| | - Jose D Debes
- Department of Medicine, University of Minnesota, MN, USA; Department of Medicine, Arusha Lutheran Medical Center, Arusha, Tanzania
| | - Ponsiano Ocama
- Department of Medicine, Makerere University College of Health Sciences, Kampala, Uganda
| | - Olufunmilayo A Lesi
- Division of Gastroenterology and Hepatology, Lagos University Teaching Hospital, Lagos, Nigeria
| | - Emuobor Odeghe
- Division of Gastroenterology and Hepatology, Lagos University Teaching Hospital, Lagos, Nigeria
| | - Ruth Bello
- Department of Medicine, Dalhatu Araf Specialist Hospital, Lafia, Nigeria
| | - Charles Onyekwere
- Department of Medicine, Lagos State University Teaching Hospital, Lagos, Nigeria
| | - Francis Ekere
- Department of Medicine, Lagos State University Teaching Hospital, Lagos, Nigeria
| | - Rufina Igetei
- Department of Medicine, Lagos State University Teaching Hospital, Lagos, Nigeria
| | | | - Benyam Addissie
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Hawa M Ali
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Gregory J Gores
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Mark D Topazian
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA
| | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, USA.
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Farah WH, Alsawas M, Mainou M, Alahdab F, Farah MH, Ahmed AT, Mohamed EA, Almasri J, Gionfriddo MR, Castaneda-Guarderas A, Mohammed K, Wang Z, Asi N, Sawchuk CN, Williams MD, Prokop LJ, Murad MH, LeBlanc A. Non-pharmacological treatment of depression: a systematic review and evidence map. ACTA ACUST UNITED AC 2016; 21:214-221. [DOI: 10.1136/ebmed-2016-110522] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Wang Y, Ding X, Wang S, Moser CD, Shaleh HM, Mohamed EA, Chaiteerakij R, Allotey LK, Chen G, Miyabe K, McNulty MS, Ndzengue A, Barr Fritcher EG, Knudson RA, Greipp PT, Clark KJ, Torbenson MS, Kipp BR, Zhou J, Barrett MT, Gustafson MP, Alberts SR, Borad MJ, Roberts LR. Antitumor effect of FGFR inhibitors on a novel cholangiocarcinoma patient derived xenograft mouse model endogenously expressing an FGFR2-CCDC6 fusion protein. Cancer Lett 2016; 380:163-73. [PMID: 27216979 PMCID: PMC5119950 DOI: 10.1016/j.canlet.2016.05.017] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 05/16/2016] [Accepted: 05/17/2016] [Indexed: 12/15/2022]
Abstract
Cholangiocarcinoma is a highly lethal cancer with limited therapeutic options. Recent genomic analysis of cholangiocarcinoma has revealed the presence of fibroblast growth factor receptor 2 (FGFR2) fusion proteins in up to 13% of intrahepatic cholangiocarcinoma (iCCA). FGFR fusions have been identified as a novel oncogenic and druggable target in a number of cancers. In this study, we established a novel cholangiocarcinoma patient derived xenograft (PDX) mouse model bearing an FGFR2-CCDC6 fusion protein from a metastatic lung nodule of an iCCA patient. Using this PDX model, we confirmed the ability of the FGFR inhibitors, ponatinib, dovitinib and BGJ398, to modulate FGFR signaling, inhibit cell proliferation and induce cell apoptosis in cholangiocarcinoma tumors harboring FGFR2 fusions. In addition, BGJ398 appeared to be superior in potency to ponatinib and dovitinib in this model. Our findings provide a strong rationale for the investigation of FGFR inhibitors, particularly BGJ398, as a therapeutic option for cholangiocarcinoma patients harboring FGFR2 fusions.
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Affiliation(s)
- Yu Wang
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Xiwei Ding
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA; Department of Gastroenterology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Shaoqing Wang
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA; Department of Pathology, Qiqihar Medical University, Qiqihar, China
| | - Catherine D Moser
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Hassan M Shaleh
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Roongruedee Chaiteerakij
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Loretta K Allotey
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Gang Chen
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Katsuyuki Miyabe
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Melissa S McNulty
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Albert Ndzengue
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Emily G Barr Fritcher
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Ryan A Knudson
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Patricia T Greipp
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Karl J Clark
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Michael S Torbenson
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Benjamin R Kipp
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Jie Zhou
- Department of Hepatobiliary Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Michael T Barrett
- Division of Hematology and Medical Oncology, Mayo Clinic College of Medicine, Phoenix, AZ, USA
| | - Michael P Gustafson
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Steven R Alberts
- Department of Medical Oncology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Mitesh J Borad
- Division of Hematology and Medical Oncology, Mayo Clinic College of Medicine, Phoenix, AZ, USA
| | - Lewis R Roberts
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Mayo Clinic Cancer Center, Rochester, MN, USA.
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Alhurani RE, Chahal CAA, Ahmed AT, Mohamed EA, Miller VM. Sex hormone therapy and progression of cardiovascular disease in menopausal women. Clin Sci (Lond) 2016; 130:1065-74. [PMID: 27215679 PMCID: PMC5316470 DOI: 10.1042/cs20160042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/04/2016] [Indexed: 02/07/2023]
Abstract
One of the most controversial health decisions facing women is deciding upon the use of hormonal treatments for symptoms of menopause. This brief review focuses on the historical context of use of menopausal hormone treatments (MHT), summarizes results of major observational, primary and secondary prevention studies of MHT and cardiovascular (CV) outcomes, provides evidence for how sex steroids modulate CV function and identifies challenges for future research. As medicine enters an era of personalization of treatment options, additional research into sex differences in the aetiology of CV diseases will lead to better risk identification for CV disease in women and identify whether a woman might receive CV benefit from specific formulations and doses of MHT.
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Affiliation(s)
- Rabe E Alhurani
- Mayo Clinic Graduate School of Medicine, Rochester, MN 55905, U.S.A. Department of Neurology, Mayo Clinic, Rochester, MN 55905, U.S.A
| | - C Anwar A Chahal
- Mayo Clinic Graduate School of Medicine, Rochester, MN 55905, U.S.A. Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, U.S.A
| | - Ahmed T Ahmed
- Mayo Clinic Graduate School of Medicine, Rochester, MN 55905, U.S.A. Division of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, Rochester, MN 55905, U.S.A
| | - Essa A Mohamed
- Mayo Clinic Graduate School of Medicine, Rochester, MN 55905, U.S.A
| | - Virginia M Miller
- Department of Surgery, Mayo Clinic, Rochester, MN, U.S.A. Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, U.S.A.
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Ali HM, Giama NH, Mohammed HA, Mohamed EA, Yang JD, Shire AM, Roberts LR. Abstract B64: Hepatocellular carcinoma characteristics and outcomes among Somali immigrants. Cancer Epidemiol Biomarkers Prev 2016. [DOI: 10.1158/1538-7755.disp15-b64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background: Hepatocellular Carcinoma (HCC) is the 6th most common cancer and the 2nd leading cause of cancer-related mortality in the world. Sub-Saharan Africa and Eastern Asia are regions endemic for viral hepatitis, accounting for 80% of all HCC cases worldwide. A recent hospital-based study assessing the frequency of hepatitis B (HBV), hepatitis C (HCV), and HCC among Somali immigrants seen at Mayo Clinic determined the adjusted frequency for HBsAg positivity was 10-fold higher and anti-HCV positivity was 3-fold higher as compared to non-Somali residents of Olmsted County, Minnesota. Furthermore, HCV infection was identified as the leading contributor to HCC development among Somalis. The overall goal of this study is to determine the risk factors, surveillance, treatment options, and outcomes of Somalis with HCC seen at Mayo Clinic.
Methods: The Mayo Clinic Unified Data Platform Advanced Cohort Explorer (ACE) query tool was used to identify Somali patients seen at Mayo Clinic from March 1, 1998 to March 31, 2015. Clinical notes were searched in ACE using conjunction and disjunction combinations: the terms Somali, Somalia or Somalian were linked with the terms HCC, Hepatocellular Carcinoma or Liver Cancer. Diagnosis was validated using histopathology and/or imaging reports from the electronic medical record (EMR). To confirm the ethnicity of identified patients, names were screened by author HMA who is of Somali heritage. Variables abstracted from the EMR include demographics, etiology of HCC, diagnosis date, date of death or last contact, Child-Turcotte-Pugh class, Barcelona Clinic Liver Cancer (BCLC) stage, comorbid conditions, initial and subsequent treatments, HCC surveillance, cirrhosis and other malignancies.
Results: 54 Somali patients diagnosed with HCC were seen at Mayo Clinic from March 1, 1998 to March 31, 2015. The mean age was 63±16.3 and 36 (67%) individuals were male. Thirty-eight (70%) of the 54 HCC patients had HCV, 14 (26%) had HBV, 1 (2%) had non-alcoholic steatohepatitis (NASH), and 1 (2%) had unknown etiology for HCC. Of those with known HCV genotypes, the most common were genotype 4 (45%) and 3 (35%). At the time of HCC diagnosis, 16 (32%) presented with BCLC stage A, 5 (10%) with stage B, 17 (34%) with stage C, and 12 (24%) with stage D. Of the 54 patients, 43 (80%) had cirrhosis, 15 (28%) had vascular invasion, and 10 (19%) had metastatic HCC. Regarding treatment, 12 (22%) patients received curative treatment while 42 (78%) received palliative treatment. Orthotopic liver transplantation (OLT) was received by 3 (6%) of Somali patients compared to 19% of non-Somali HCC patients seen at Mayo Clinic between 2007 and 2009. HCC was detected during surveillance in 11 (20%) Somali HCC patients; of the 11, 2 (4%) received semiannual surveillance.
Conclusions: These findings provide a starting point to address liver cancer disparities among Somalis. HCV genotype 4 was most commonly associated with HCC development among the study population. Due to low surveillance rates, more Somalis presented with end-stage liver disease. Furthermore, advanced stage HCC was disproportionately found among Somalis compared to the general North American population. A recent study demonstrated that 11% of North American HCC patients seen at 4 major medical centers presented with stage D. By contrast, our study found 25% of Somalis had Stage D HCC. As a result, Somalis are more likely to receive palliative rather than curative treatments. Improving the identification of individuals with chronic HBV or HCV who are at increased risk for HCC and implementing more comprehensive HCC surveillance is likely to reduce the burden of HCC among this population.
Citation Format: Hawa M. Ali, Nasra H. Giama, Hager Ahmed Mohammed, Essa A. Mohamed, Ju Dong Yang, Abdirashid M. Shire, Lewis R. Roberts. Hepatocellular carcinoma characteristics and outcomes among Somali immigrants. [abstract]. In: Proceedings of the Eighth AACR Conference on The Science of Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; Nov 13-16, 2015; Atlanta, GA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2016;25(3 Suppl):Abstract nr B64.
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Affiliation(s)
- Hawa M. Ali
- Mayo Clinic College of Medicine, Rochester, MN
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Shaleh HM, Giama NH, Mohamed EA, Mohammed HFA, Kerandi LM, Oseini AM, Ali AO, Waaeys IA, Choi J, Kerandi HM, Mohamed SA, Ali HA, Ali HM, Balls-Berry JE, Roberts LR. Abstract A46: A cross-sectional assessment of knowledge, attitudes, and behaviors about viral hepatitis and hepatocellular carcinoma among Kenyan and Liberian immigrants living in Minnesota. Cancer Epidemiol Biomarkers Prev 2016. [DOI: 10.1158/1538-7755.disp15-a46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background: The rising incidence of hepatocellular carcinoma in the US is partly due to increased immigration from sub-Saharan Africa. Viral hepatitis is prevalent in sub-Saharan Africa, resulting in ~20% of all hepatocellular carcinoma cases worldwide. Community-based education and screening efforts aimed at identifying viral hepatitis cases among African immigrants will likely reduce the burden of hepatocellular carcinoma.
Aim: To determine the knowledge, attitudes and behaviors (KAB) of Liberian and Kenyan immigrants residing in Minnesota about hepatitis B virus and hepatitis C virus screening, vaccination, acquisition, and disease management.
Methods: A community-engaged research framework was used for the development of this cross-sectional study. The team created a survey using validated items designed to assess the KAB of viral hepatitis measured on a 1 to 20 scale with 1 being low and 20 being high. Using community-engaged methodology, participants who were ≥18 years of age and self-identified either as Liberian and Kenyan were recruited from churches, community centers, and community events. The survey was administered between June 2014 and February 2015. Spearman's rho correlation was used to identify associations among scores while the Mann-Whitney U-test was used for comparisons between Liberians and Kenyans.
Results: Of 80 distributed surveys, 73 were returned, achieving a response rate of 91%. Respondents were 50 (64%) Liberians and 23 (29%) Kenyans; 42 (54%) were female; the mean age was 42 years (range 18-90); most were college educated (57%) and had health insurance (83%). 55% reported previous screening for hepatitis B, 51% had completed hepatitis B vaccination and 38% reported being screened for hepatitis C. Mean scores ± SD were 4.6±2.8 for knowledge, 4.7±1.0 for attitude, and 4.2±1.9 for behavior, resulting in poor knowledge and adequate attitude and behavioral levels. Significant and positive linear correlation was observed between attitude and behavior (r=.385, p<.001), while there were no significant correlations between knowledge and attitude (r=-.115, p=.33) or knowledge and behavior (r=-.11, p=.36). When Liberians and Kenyans were compared, knowledge was higher in Liberians (6.2±1.9 vs1.5±1.0; p<.001); there were no significant differences observed in attitude or behavior scores (p>.05 for both).
Conclusions: There is lack of awareness among African immigrants of the health risks associated with viral hepatitis which contributes to disparities in healthcare seeking behaviors. It is important to implement comprehensive education and screening programs on viral hepatitis in these communities in order to reduce the burden of viral hepatitis and hepatocellular carcinoma development.
Citation Format: Hassan M. Shaleh, Nasra H. Giama, Essa A. Mohamed, Hager F. Ahmed Mohammed, Linda M. Kerandi, Abdul M. Oseini, Abdiwahab O. Ali, Ibrahim A. Waaeys, Jonggi Choi, Henry M. Kerandi, Safra A. Mohamed, Hamdi A. Ali, Hawa M. Ali, Joyce E. Balls-Berry, Lewis R. Roberts. A cross-sectional assessment of knowledge, attitudes, and behaviors about viral hepatitis and hepatocellular carcinoma among Kenyan and Liberian immigrants living in Minnesota. [abstract]. In: Proceedings of the Eighth AACR Conference on The Science of Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; Nov 13-16, 2015; Atlanta, GA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2016;25(3 Suppl):Abstract nr A46.
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Mohamed EA, Giama NH, Shaleh HM, Kerandi LM, Oseini AM, Mohammed HFA, Kerandi HM, Togbah D, Ali AO, Waaeys IA, Ali HA, Mohamed SA, Ali HM, Balls-Berry JE, Roberts LR. Abstract C01: Evaluating knowledge, attitudes, and behaviors about viral hepatitis and hepatocellular carcinoma among recent African immigrants in Minnesota: A community-engaged qualitative study. Cancer Epidemiol Biomarkers Prev 2016. [DOI: 10.1158/1538-7755.disp15-c01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Background: African immigrants in the US have substantially higher prevalences of viral hepatitis and hepatocellular carcinoma than the general population. In Minnesota, which has the third largest state population of African immigrants in the US, the incidence and mortality for hepatocellular carcinoma among Blacks is 3 times higher than Caucasians (The 2012 Minnesota Department of Health Cancer Report). Most African immigrants are unaware of their risk for hepatocellular carcinoma which contributes to substantial liver health disparities. Limited research exists on the burden of viral hepatitis and hepatocellular carcinoma among African immigrants. Thus, we conducted a pilot study to evaluate the knowledge, attitudes, and behaviors (KAB) of African immigrants related to liver disease.
Methods: The study used a community-engaged research framework. The research team consisted of stakeholders from an academic medical center and Ethiopian, Liberian, and Kenyan community-based organizations and faith-based centers. A semi-structured focus group guide was developed using a KAB approach with open-ended questions. Content analysis was used to thematically code the transcribed data. Qualitative analysis software (ATLAS.TI) was used to organize codes and highlight major themes contributing to liver health disparities.
Results: We enrolled 63 participants and conducted 9 focus groups (1 in Amharic, 2 in Oromo, and 6 in English) in Rochester and Minneapolis, Minnesota. The mean age was 47±19; 32 participants (51%) were male; the median years lived in the US was 12 years. General knowledge of the modes of transmission of viral hepatitis and of the prevention and development of liver cancer was minimal. Themes related to barriers to viral hepatitis screening and vaccination included perceived cultural stigma and use of traditional remedies. Common sources of general health information included internet, pamphlets, friends, family, spiritual leaders and healthcare professionals. Healthcare professionals are the source for information on screening, prevention, transmission and treatment of viral hepatitis and liver cancer. Most participants sought healthcare at reputable medical institutions. Media sources and community-based events at faith-centers were preferred modes of information dissemination on viral hepatitis and liver cancer screening and prevention.
Conclusions: Participants identified several factors contributing to the increased burden of hepatocellular carcinoma in Minnesota including lack of knowledge of disease transmission and progression, cultural stigma/taboos, and lack of preventive care. Culturally and linguistically appropriate interventions are needed to increase awareness, prevention, early detection, and treatment of viral hepatitis and liver cancer among African immigrants in Minnesota.
Citation Format: Essa A. Mohamed, Nasra H. Giama, Hassan M. Shaleh, Linda M. Kerandi, Abdul M. Oseini, Hager F. Ahmed Mohammed, Henry M. Kerandi, Dekermue Togbah, Abdiwahab O. Ali, Ibrahim A. Waaeys, Hamdi A. Ali, Safra A. Mohamed, Hawa M. Ali, Joyce E. Balls-Berry, Lewis R. Roberts. Evaluating knowledge, attitudes, and behaviors about viral hepatitis and hepatocellular carcinoma among recent African immigrants in Minnesota: A community-engaged qualitative study. [abstract]. In: Proceedings of the Eighth AACR Conference on The Science of Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; Nov 13-16, 2015; Atlanta, GA. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2016;25(3 Suppl):Abstract nr C01.
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Lok ASF, McMahon BJ, Brown RS, Wong JB, Ahmed AT, Farah W, Almasri J, Alahdab F, Benkhadra K, Mouchli MA, Singh S, Mohamed EA, Abu Dabrh AM, Prokop LJ, Wang Z, Murad MH, Mohammed K. Antiviral therapy for chronic hepatitis B viral infection in adults: A systematic review and meta-analysis. Hepatology 2016; 63:284-306. [PMID: 26566246 DOI: 10.1002/hep.28280] [Citation(s) in RCA: 366] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 09/23/2015] [Indexed: 01/10/2023]
Abstract
UNLABELLED Chronic hepatitis B viral (HBV) infection remains a significant global health problem. Evidence-based guidelines are needed to help providers determine when treatment should be initiated, which medication is most appropriate, and when treatment can safely be stopped. The American Association for the Study of Liver Diseases HBV guideline methodology and writing committees developed a protocol a priori for this systematic review. We searched multiple databases for randomized controlled trials and controlled observational studies that enrolled adults ≥18 years old diagnosed with chronic HBV infection who received antiviral therapy. Data extraction was done by pairs of independent reviewers. We included 73 studies, of which 59 (15 randomized controlled trials and 44 observational studies) reported clinical outcomes. Moderate-quality evidence supported the effectiveness of antiviral therapy in patients with immune active chronic HBV infection in reducing the risk of cirrhosis, decompensated liver disease, and hepatocellular carcinoma. In immune tolerant patients, moderate-quality evidence supports improved intermediate outcomes with antiviral therapy. Only very low-quality evidence informed the questions about discontinuing versus continuing antiviral therapy in hepatitis B e antigen-positive patients who seroconverted from hepatitis B e antigen to hepatitis B e antibody and about the safety of entecavir versus tenofovir. Noncomparative and indirect evidence was available for questions about stopping versus continuing antiviral therapy in hepatitis B e antigen-negative patients, monotherapy versus adding a second agent in patients with persistent viremia during treatment, and the effectiveness of antivirals in compensated cirrhosis with low-level viremia. CONCLUSION Most of the current literature focuses on the immune active phases of chronic HBV infection; decision-making in other commonly encountered and challenging clinical settings depends on indirect evidence.
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Affiliation(s)
- Anna S F Lok
- Division of Gastroenterology and Hepatology, University of Michigan, Ann Arbor, MI
| | - Brian J McMahon
- Liver Diseases and Hepatitis Program, Alaska Native Tribal Health Consortium, Anchorage, AK
| | - Robert S Brown
- Division of Gastroenterology and Hepatology, Weill Cornell Medical College, New York, NY
| | - John B Wong
- Division of Clinical Decision Making, Tufts Medical Center, Boston, MA
| | - Ahmed T Ahmed
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | - Wigdan Farah
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | - Jehad Almasri
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | - Fares Alahdab
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | - Khalid Benkhadra
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | | | - Siddharth Singh
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN
| | - Essa A Mohamed
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN
| | | | | | - Zhen Wang
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN
| | - Mohammad Hassan Murad
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN.,Division of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, Rochester, MN
| | - Khaled Mohammed
- Evidence-Based Practice Research Program, Mayo Clinic, Rochester, MN.,Center for the Science of Health Care Delivery, Mayo Clinic, Rochester, MN.,Division of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, Rochester, MN
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Chaiteerakij R, Zhang X, Addissie BD, Mohamed EA, Harmsen WS, Theobald PJ, Peters BE, Balsanek JG, Ward MM, Giama NH, Moser CD, Oseini AM, Umeda N, Venkatesh S, Harnois DM, Charlton MR, Yamada H, Satomura S, Algeciras-Schimnich A, Snyder MR, Therneau TM, Roberts LR. Combinations of biomarkers and Milan criteria for predicting hepatocellular carcinoma recurrence after liver transplantation. Liver Transpl 2015; 21:599-606. [PMID: 25789635 PMCID: PMC4490162 DOI: 10.1002/lt.24117] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Revised: 01/06/2015] [Accepted: 01/18/2015] [Indexed: 02/06/2023]
Abstract
Growing evidence suggests that pretransplant alpha-fetoprotein (AFP) predicts outcomes of hepatocellular carcinoma (HCC) patients treated with liver transplantation. We aimed to determine whether pretransplant AFP, Lens culinaris agglutinin-reactive alpha-fetoprotein (AFP-L3), and des-gamma-carboxyprothrombin (DCP) predicted HCC recurrence after transplantation. A retrospective cohort study of 313 HCC patients undergoing transplantation between 2000 and 2008 was conducted, and 48 (15.3%) developed recurrence during a median follow-up of 90.8 months. The 127 patients with available serum drawn before transplantation were included; they included 86 without recurrence and 41 with recurrence. Serum was tested for AFP, AFP-L3%, and DCP in a blinded fashion with the μTASWako i30 immunoanalyzer. All biomarkers were significantly associated with HCC recurrence. The hazard ratios (HRs) were 3.5 [95% confidence interval (CI), 1.9-6.7; P < 0.0001] for DCP ≥ 7.5 ng/mL and 2.8 (95% CI, 1.4-5.4; P = 0.002) for AFP ≥ 250 ng/mL. The HR increased to 5.2 (95% CI, 2.3-12.0; P < 0.0001) when AFP ≥ 250 ng/mL and DCP ≥7.5 ng/mL were considered together. When they were combined with the Milan criteria, the HR increased from 2.6 (95% CI, 1.4-4.7; P = 0.003) for outside the Milan criteria to 8.6 (95% CI, 3.0-24.6; P < 0.0001) for outside the Milan criteria and AFP ≥ 250 ng/mL and to 7.2 (95% CI, 2.8-18.1; P < 0.0001) for outside the Milan criteria and DCP ≥7.5 ng/mL. Our findings suggest that biomarkers are useful for predicting the risk of HCC recurrence after transplantation. Using both biomarkers and the Milan criteria may be better than using the Milan criteria alone in optimizing the decision of liver transplantation eligibility.
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Affiliation(s)
- Roongruedee Chaiteerakij
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
- Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
- King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Xiaodan Zhang
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - Benyam D. Addissie
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - Essa A. Mohamed
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - William S. Harmsen
- Division of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine, Rochester, MN
| | - Paul J. Theobald
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Brian E. Peters
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Joseph G. Balsanek
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Melissa M. Ward
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Nasra H. Giama
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - Catherine D. Moser
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - Abdul M. Oseini
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | - Naoki Umeda
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | | | - Denise M. Harnois
- Department of Transplantation, Mayo Clinic Florida, Jacksonville, FL
| | - Michael R. Charlton
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
| | | | | | - Alicia Algeciras-Schimnich
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Melissa R. Snyder
- Division of Laboratory Medicine, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, MN
| | - Terry M. Therneau
- Division of Biomedical Statistics and Informatics, Mayo Clinic College of Medicine, Rochester, MN
| | - Lewis R. Roberts
- Division of Gastroenterology and Hepatology and Mayo Clinic Cancer Center, Mayo Clinic College of Medicine, Rochester, MN
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Sallam YI, Aly MH, Nassar AF, Mohamed EA. Solar drying of whole mint plant under natural and forced convection. J Adv Res 2015; 6:171-8. [PMID: 25750751 PMCID: PMC4348449 DOI: 10.1016/j.jare.2013.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 11/29/2013] [Accepted: 12/01/2013] [Indexed: 11/25/2022] Open
Abstract
Two identical prototype solar dryers (direct and indirect) having the same dimensions were used to dry whole mint. Both prototypes were operated under natural and forced convection modes. In the case of the later one the ambient air was entered the dryer with the velocity of 4.2 m s−1. The effect of flow mode and the type of solar dryers on the drying kinetics of whole mint were investigated. Ten empirical models were used to fit the drying curves; nine of them represented well the solar drying behavior of mint. The results indicated that drying of mint under different operating conditions occurred in the falling rate period, where no constant rate period of drying was observed. Also, the obtained data revealed that the drying rate of mint under forced convection was higher than that of mint under natural convection, especially during first hours of drying (first day). The values of the effective diffusivity coefficient for the mint drying ranged between 1.2 × 10−11 and 1.33 × 10−11 m2 s−1.
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Affiliation(s)
- Y I Sallam
- Food Science Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - M H Aly
- Food Science Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
| | - A F Nassar
- Chemical Engineering Department, Faculty of Engineering, Cairo University, 12613 Giza, Egypt
| | - E A Mohamed
- Food Science Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
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Alkharsah KR, Alzahrani AJ, Obeid OE, El-Harith EHA, Guella A, Mohamed EA, Haykal AH, Stuhrmann M, Al-Ali AK. Vascular endothelial growth factor A polymorphism and risk of Kaposi's sarcoma herpesvirus viremia in kidney allograft recipients. Transpl Infect Dis 2014; 16:783-9. [PMID: 25124076 DOI: 10.1111/tid.12277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 04/28/2014] [Accepted: 05/22/2014] [Indexed: 11/30/2022]
Abstract
BACKGROUND Kaposi's sarcoma herpesvirus (KSHV) causes Kaposi's sarcoma (KS), primary effusion lymphoma, and multicentric Castleman's disease in immunocompromised patients including allograft recipients. Detection of KSHV DNA in blood, as well as host genetic polymorphisms has been found to be associated with an increased risk for KS. We investigated an association between single nucleotide polymorphisms (SNPs) in vascular endothelial growth factor A (VEGFA) gene region and KSHV viremia in kidney transplant recipients (KTR) in Saudi Arabia. METHODS In total, 152 KTR who have survived kidney transplantation for at least 6 months were included in the study. KSHV viremia was determined by real-time polymerase chain reaction (PCR). Genotyping of SNPs in the VEGFA region was performed by PCR and direct sequencing, as well as by restriction fragment length polymorphism. RESULTS KSHV DNA was detected in 28.9% (n = 44) of the study population. The A-allele at position C172A VEGFA gene promoter region was found to be associated with KSHV viremia (odd ratio [OR] = 4.8, P = 0.005). In addition, the G-allele at position C+405G in the 5'-untranslated region was associated with KSHV viremia in women, but not in men (OR = 3.98, P = 0.004). CONCLUSIONS Our results suggest an association of VEGFA polymorphisms with KSHV viremia among KTR in this study population. A limitation of our study is that the results can only be predicated for patients 6 months after kidney transplantation and should be validated in another cohort with larger sample size.
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Affiliation(s)
- K R Alkharsah
- Center for Research and Consultation Studies, University of Dammam, Dammam, Saudi Arabia
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Abdel-Farid IB, Sheded MG, Mohamed EA. Metabolomic profiling and antioxidant activity of some Acacia species. Saudi J Biol Sci 2014; 21:400-8. [PMID: 25313274 DOI: 10.1016/j.sjbs.2014.03.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 03/19/2014] [Accepted: 03/23/2014] [Indexed: 10/25/2022] Open
Abstract
Metabolomic profiling of different parts (leaves, flowers and pods) of Acacia species (Acacia nilotica, Acacia seyal and Acacia laeta) was evaluated. The multivariate data analyses such as principal component analysis (PCA) and partial least square-discriminant analysis (PLS-DA) were used to differentiate the distribution of plant metabolites among different species or different organs of the same species. A. nilotica was characterized with a high content of saponins and A. seyal was characterized with high contents of proteins, phenolics, flavonoids and anthocyanins. A. laeta had a higher content of carbohydrates than A. nilotica and A. seyal. On the basis of these results, total antioxidant capacity, DPPH free radical scavenging activity and reducing power of the methanolic extracts of studied parts were evaluated. A. nilotica and A. seyal extracts showed less inhibitory concentration 50 (IC50) compared to A. laeta extracts which means that these two species have the strongest radical scavenging activity whereas A. laeta extracts have the lowest radical scavenging activity. A positive correlation between saponins and flavonoids with total antioxidant capacity and DPPH radical scavenging activity was observed. Based on these results, the potentiality of these plants as antioxidants was discussed.
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Affiliation(s)
- I B Abdel-Farid
- Botany Department, Faculty of Science, Aswan University, Aswan 81528, Egypt ; Biology Department, Faculty of Science, Aljouf University, Sakaka, Saudi Arabia
| | - M G Sheded
- Botany Department, Faculty of Science, Aswan University, Aswan 81528, Egypt
| | - E A Mohamed
- Botany Department, Faculty of Science, Aswan University, Aswan 81528, Egypt
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Casey DP, Mohamed EA, Joyner MJ. Role of nitric oxide and adenosine in the onset of vasodilation during dynamic forearm exercise. Eur J Appl Physiol 2012; 113:295-303. [PMID: 22692759 DOI: 10.1007/s00421-012-2439-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Accepted: 05/30/2012] [Indexed: 10/27/2022]
Abstract
We tested the hypothesis that nitric oxide (NO) and adenosine contribute to the onset of vasodilation during dynamic forearm exercise. Twenty-two subjects performed rhythmic forearm exercise (20 % of maximum) during control and NO synthase (NOS) inhibition (N (G)-monomethyl-L-arginine; L-NMMA) trials. A subset of subjects performed a third trial of forearm exercise during combined inhibition of NOS and adenosine (aminophylline; n = 9). Additionally, a separate group of subjects (n = 7) performed rhythmic forearm exercise during control, inhibition of adenosine alone and combined inhibition of adenosine and NOS. Forearm vascular conductance (FVC; ml min(-1) · 100 mmHg(-1)) was calculated from blood flow and mean arterial pressure (mmHg). The onset of vasodilation was assessed by calculating the slope of the FVC response for every duty cycle between baseline and steady state, and the number of duty cycles (1-s contraction/2-s relaxation) to reach steady state. NOS inhibition blunted vasodilation at the onset of exercise (11.1 ± 0.8 vs. 8.5 ± 0.6 FVC units/duty cycle; P < 0.001 vs. control) and increased the time to reach steady state (25 ± 1 vs. 32 ± 1 duty cycles; P < 0.001 vs. control). Vasodilation was blunted further with combined inhibition of NOS and adenosine (7.5 ± 0.6 vs. 6.2 ± 0.8 FVC units/duty cycle; P < 0.05 vs. L-NMMA alone), but not with aminophylline alone (16.0 ± 2.2 vs. 14.7 ± 2.0 FVC units/duty cycle; P = 0.67 vs. control). Our data indicate that NO and adenosine (in the absence of NO) contribute to the onset of vasodilation during dynamic forearm exercise.
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Affiliation(s)
- Darren P Casey
- Department of Anesthesiology, Mayo Clinic, 200 First St. SW, Rochester, MN 55905, USA.
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Casey DP, Walker BG, Mohamed EA, Roberts SK, Joyner MJ. α‐adrenergic vasoconstriction contributes to the blunted skeletal muscle contraction‐induced rapid vasodilation with aging. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1138.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mohamed EA, Bayoumi OR, Draz SF. Impact of an educational programme on knowledge, beliefs, practices and expectations about care among adolescent glaucoma patients in Cairo. East Mediterr Health J 2012; 17:960-8. [PMID: 22355950 DOI: 10.26719/2011.17.12.960] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Glaucoma is a leading cause of blindness worldwide. The aim of the current study was to evaluate the impact of an educational programme on knowledge, beliefs, practices and expectations towards glaucoma and eye care among adolescent patients with glaucoma. A purposive sample of 50 patients with glaucoma aged 12-18 years, attending ophthalmology outpatient clinics in Cairo, Egypt, were given an educational programme focusing on information about glaucoma, correcting patients' incorrect beliefs and expectations, and demonstrations and retraining about eye care. A range of tools was used to assess patients before and after the programme: questionnaire, observation checklist, physical assessment sheet, childrens' depression scale, children manifest anxiety scale, self-esteem inventory and patients' expectations scale. The programme significantly improved patients' knowledge and beliefs about glaucoma and their practices and expectations concerning eye care. Innovative educational programmes about eye diseases are needed to improve patients' knowledge and practices.
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Affiliation(s)
- E A Mohamed
- Department of Paediatric Nursing, Faculty of Nursing, Ain Shams University, Cairo, Egypt.
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Werhwein EA, Mohamed EA, Curry TB, Basu A, Rizza RA, Basu R, Joyner MJ. Is blood pressure control in humans mediated by the peripheral chemoreceptors? FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.1076.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | - A Basu
- Endocrine Research UnitMayo ClinicRochesterMN
| | - R A Rizza
- Endocrine Research UnitMayo ClinicRochesterMN
| | - R Basu
- Endocrine Research UnitMayo ClinicRochesterMN
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Oh SA, Park YJ, You YA, Mohamed EA, Pang MG. Capacitation status of stored boar spermatozoa is related to litter size of sows. Anim Reprod Sci 2010; 121:131-8. [PMID: 20573460 DOI: 10.1016/j.anireprosci.2010.05.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Revised: 03/31/2010] [Accepted: 05/31/2010] [Indexed: 11/29/2022]
Abstract
Semen parameters can be considered useful predictors of sperm fertility. The objective of this study was to address the question of whether differences in in vivo fertility after the use of different ejaculates could be predicted using sperm kinematics, capacitation status, and sperm penetration ability under commercial pig production conditions. The percentage of capacitated sperm, as assessed by chlortetracycline (CTC) staining, was positively correlated with litter size (p<0.01). Our data suggest that litter size increases in proportion to the number of capacitated spermatozoa. When all semen parameters (kinematics, sperm capacitation status, and sperm penetration ability) and litter size were included in a multiple linear regression analysis, significant associations were found between the percentage of capacitated sperm (B-type), the sperm fertility index as assessed by a sperm penetration assay (SPA), and litter size. This relationship between capacitated sperm and litter size, however, was more predictive for smaller litter groups than larger ones. We found that the percentage of B-type sperm was significantly correlated with historic average litter size. However, there was no significant correlation between the percentage of B-type sperm and historic farrowing rates. To determine the normal range for B-type sperm, the lower limits were established as 30% for small litters (<8 piglets) and 35% for large litters. The overall accuracy of the assay was 92% and 83% for small and large litters, respectively. These results indicate that capacitation status as measured by CTC staining is a useful predictor of sperm fertility, equivalent to SPA. Moreover, original capacitation status exhibited better predictive ability for small litters than for large ones. Therefore, subfertile boars can be identified primarily by capacitation status.
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Affiliation(s)
- S A Oh
- Department of Animal Science & Technology and BET Research Institute, Chung-Ang University, Ansung, Gyeonggi-Do, Republic of Korea
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Abdel-Khalek EK, El-Meligy WM, Mohamed EA, Amer TZ, Sallam HA. Study of the relationship between electrical and magnetic properties and Jahn-Teller distortion in R(0.7)Ca(0.3)Mn(0.95)Fe(0.05)O(3) perovskites. J Phys Condens Matter 2009; 21:026003. [PMID: 21813996 DOI: 10.1088/0953-8984/21/2/026003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this work structural, magnetic and electrical properties of R(0.7)Ca(0.3)Mn(0.95)Fe(0.05)O(3) (R = Pr and Nd) perovskite manganites are presented. Structural characterization of these compounds shows that both have orthorhombic (Pbnm) phase. The Mössbauer spectra show clear evidence of the local structural distortion of the Mn(Fe)O(6) octahedron on the basis of non-zero nuclear quadrupole interactions for high-spin Fe(3+) ions. It was found that the local structural distortion decreases significantly on replacing Pr(3+) by Nd(3+). This replacement dependence of the Jahn-Teller coupling strength estimated from the Mössbauer results was found to be consistent with the electrical and magnetic properties.
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Albright JC, Dassenko DJ, Mohamed EA, Beussman DJ. Identifying gel-separated proteins using in-gel digestion, mass spectrometry, and database searching: Consider the chemistry. Biochem Mol Biol Educ 2009; 37:49-55. [PMID: 21567688 DOI: 10.1002/bmb.20259] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry is an important bioanalytical technique in drug discovery, proteomics, and research at the biology-chemistry interface. This is an especially powerful tool when combined with gel separation of proteins and database mining using the mass spectral data. Currently, few hands-on laboratory opportunities exist for undergraduate students to master this technique despite the usefulness of this technique in biological research. One reason for this lack of incorporation into the teaching curriculum is the relatively low number of published laboratory experiments that demonstrate how mass spectrometry can be incorporated into undergraduate laboratories. We present a simple experiment designed to introduce students to the analysis of gel separated proteins using mass spectrometry. In this experiment, students analyze one or more proteins using gel electrophoresis, followed by in-gel digestion, MALDI-time-of-flight (TOF) mass spectrometry and database mining. The experiment also demonstrates how erroneous results can be obtained if careful attention is not paid to all aspects of the experimental process. The data presented here can be used in a classroom or laboratory setting even if hands-on access to a MALDI-TOF mass spectrometer is not possible.
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Mohamed EA, MacDowall P, Coward RA. Timing of sildenafil therapy in dialysis patients-lessons following an episode of hypotension. Nephrol Dial Transplant 2000; 15:926-7. [PMID: 10831668 DOI: 10.1093/ndt/15.6.926] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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