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Frydman GH, Boyer EW, Nazarian RM, Van Cott EM, Piazza G. Coagulation Status and Venous Thromboembolism Risk in African Americans: A Potential Risk Factor in COVID-19. Clin Appl Thromb Hemost 2020; 26:1076029620943671. [PMID: 32702995 PMCID: PMC7383642 DOI: 10.1177/1076029620943671] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/25/2020] [Accepted: 06/29/2020] [Indexed: 12/16/2022] Open
Abstract
Severe acute respiratory syndrome coronavirus 2 infection (COVID-19) is known to induce severe inflammation and activation of the coagulation system, resulting in a prothrombotic state. Although inflammatory conditions and organ-specific diseases have been shown to be strong determinants of morbidity and mortality in patients with COVID-19, it is unclear whether preexisting differences in coagulation impact the severity of COVID-19. African Americans have higher rates of COVID-19 infection and disease-related morbidity and mortality. Moreover, African Americans are known to be at a higher risk for thrombotic events due to both biological and socioeconomic factors. In this review, we explore whether differences in baseline coagulation status and medical management of coagulation play an important role in COVID-19 disease severity and contribute to racial disparity trends within COVID-19.
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MESH Headings
- Black or African American/genetics
- Anemia, Sickle Cell/blood
- Anemia, Sickle Cell/ethnology
- Anticoagulants/therapeutic use
- Betacoronavirus
- Blood Proteins/analysis
- Blood Proteins/genetics
- COVID-19
- Clinical Trials as Topic
- Comorbidity
- Coronavirus Infections/blood
- Coronavirus Infections/complications
- Coronavirus Infections/ethnology
- Factor VIII/analysis
- Female
- Fibrin Fibrinogen Degradation Products/analysis
- Genetic Association Studies
- Genetic Predisposition to Disease
- Healthcare Disparities
- Humans
- Lupus Erythematosus, Systemic/blood
- Lupus Erythematosus, Systemic/ethnology
- Male
- Pandemics
- Patient Selection
- Pneumonia, Viral/blood
- Pneumonia, Viral/complications
- Pneumonia, Viral/ethnology
- Polymorphism, Single Nucleotide
- Prevalence
- Renal Insufficiency, Chronic/blood
- Renal Insufficiency, Chronic/ethnology
- Risk Factors
- SARS-CoV-2
- Social Determinants of Health
- Socioeconomic Factors
- Thrombophilia/blood
- Thrombophilia/drug therapy
- Thrombophilia/ethnology
- Thrombophilia/etiology
- Venous Thromboembolism/blood
- Venous Thromboembolism/ethnology
- Venous Thromboembolism/etiology
- Venous Thromboembolism/prevention & control
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Affiliation(s)
- Galit H. Frydman
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Edward W. Boyer
- Department of Emergency Medicine, Brigham and Women’s Hospital, Boston, MA, USA
| | | | | | - Gregory Piazza
- Department of Medicine, Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA, USA
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Enkhmaa B, Anuurad E, Zhang W, Kim K, Berglund L. Heritability of apolipoprotein (a) traits in two-generational African-American and Caucasian families. J Lipid Res 2019; 60:1603-1609. [PMID: 31324652 PMCID: PMC6718432 DOI: 10.1194/jlr.p091249] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 07/15/2019] [Indexed: 11/20/2022] Open
Abstract
Heritability of LPA allele, apo(a) isoform sizes, and isoform-associated lipoprotein(a) [Lp(a)] levels was studied in 82 Caucasian and African-American families with two parents and two children (age: 6-74 years). We determined: 1) Lp(a) levels; 2) LPA allele sizes; 3) apo(a) isoform sizes; and 4) isoform-specific apo(a) levels (ISLs), the amount of Lp(a) carried by an individual apo(a) isoform. Trait heritability was estimated by mid-parent-offspring analysis. The ethnicity-adjusted heritability estimate for Lp(a) level was 0.95. Heritability for ISLs corresponding to the smaller LPA allele in a given allele-pair was higher than that corresponding to the larger LPA allele (0.91 vs. 0.59, P = 0.017). Although not statistically different, heritability for both apo(a) isoforms (0.90 vs. 0.70) and LPA alleles (0.98 vs. 0.82) was higher for the smaller versus larger sizes. Heritability was generally lower in African-Americans versus Caucasians with a 4-fold difference for the larger LPA allele (0.25 vs. 0.94, P = 0.001). In Caucasians, an overall higher heritability pattern was noted for the older (≥47 years) versus younger (<47 years) families. In conclusion, Lp(a) level and traits associated with the smaller LPA alleles were strongly determined by genetics, although with a varying ethnic influence. Ethnic differences in heritability of the larger LPA allele warrant further investigations.
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Affiliation(s)
- Byambaa Enkhmaa
- Departments of Internal MedicineUniversity of California Davis, Davis, CA.
| | - Erdembileg Anuurad
- Departments of Internal MedicineUniversity of California Davis, Davis, CA
| | - Wei Zhang
- Departments of Internal MedicineUniversity of California Davis, Davis, CA
| | - Kyoungmi Kim
- Public Health Sciences University of California Davis, Davis, CA
| | - Lars Berglund
- Departments of Internal MedicineUniversity of California Davis, Davis, CA
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Dugas LR, Fuller M, Gilbert J, Layden BT. The obese gut microbiome across the epidemiologic transition. Emerg Themes Epidemiol 2016; 13:2. [PMID: 26759600 PMCID: PMC4710045 DOI: 10.1186/s12982-015-0044-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Accepted: 12/15/2015] [Indexed: 12/13/2022] Open
Abstract
The obesity epidemic has emerged over the past few decades and is thought to be a result of both genetic and environmental factors. A newly identified factor, the gut microbiota, which is a bacterial ecosystem residing within the gastrointestinal tract of humans, has now been implicated in the obesity epidemic. Importantly, this bacterial community is impacted by external environmental factors through a variety of undefined mechanisms. We focus this review on how the external environment may impact the gut microbiota by considering, the host’s geographic location ‘human geography’, and behavioral factors (diet and physical activity). Moreover, we explore the relationship between the gut microbiota and obesity with these external factors. And finally, we highlight here how an epidemiologic model can be utilized to elucidate causal relationships between the gut microbiota and external environment independently and collectively, and how this will help further define this important new factor in the obesity epidemic.
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Affiliation(s)
- Lara R Dugas
- Public Health Sciences, Stritch School of Medicine, Loyola University Chicago, 2160 S. 1st Ave, Maywood, IL 60153 USA
| | - Miles Fuller
- Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University, Evanston, USA
| | - Jack Gilbert
- Argonne National Laboratory, Biosciences Department, Institute for Genomic and Systems Biology, 9700 South Cass Avenue, Argonne, IL 60439 USA ; Department of Ecology and Evolution, University of Chicago, 1101 E 57th Street, Chicago, IL 60637 USA ; Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543 USA ; College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058 China
| | - Brian T Layden
- Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University, Evanston, USA ; Jesse Brown Veterans Affairs Medical Center, Chicago, IL USA
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Okwuosa TEM, Williams KA. Cardiovascular Health in Africans Living in the United States. CURRENT CARDIOVASCULAR RISK REPORTS 2012. [DOI: 10.1007/s12170-012-0227-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Hall K, Murrell J, Ogunniyi A, Deeg M, Baiyewu O, Gao S, Gureje O, Dickens J, Evans R, Smith-Gamble V, Unverzagt FW, Shen J, Hendrie H. Cholesterol, APOE genotype, and Alzheimer disease: an epidemiologic study of Nigerian Yoruba. Neurology 2006; 66:223-7. [PMID: 16434658 PMCID: PMC2860622 DOI: 10.1212/01.wnl.0000194507.39504.17] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
OBJECTIVE To examine the relationship between cholesterol and other lipids, APOE genotype, and risk of Alzheimer disease (AD) in a population-based study of elderly Yoruba living in Ibadan, Nigeria. METHODS Blood samples and clinical data were collected from Yoruba study participants aged 70 years and older (N = 1,075) as part of the Indianapolis-Ibadan Dementia Project, a longitudinal epidemiologic study of AD. Cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL), and triglyceride levels were measured in fasting blood samples. DNA was extracted and APOE was genotyped. Diagnoses of AD were made by consensus using National Institute of Neurologic Disorders/Stroke-Alzheimer's Disease and Related Disorders Association criteria. RESULTS Logistic regression models showed interaction after adjusting for age and gender between APOE-epsilon4 genotype and biomarkers in the risk of AD cholesterol*genotype (p = 0.022), LDL*genotype (p= 0.018), and triglyceride*genotype (p = 0.036). Increasing levels of cholesterol and LDL were associated with increased risk of AD in individuals without the APOE-epsilon4 allele, but not in those with APOE-epsilon4. There was no significant association between levels of triglycerides and AD risk in those without APOE-epsilon4. CONCLUSIONS There was a significant interaction between cholesterol, APOE-epsilon4, and the risk of Alzheimer disease (AD) in the Yoruba, a population that has lower cholesterol levels and lower incidence rates of AD compared to African Americans. APOE status needs to be considered when assessing the relationship between lipid levels and AD risk in population studies.
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Affiliation(s)
- K Hall
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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Schmidt K, Kraft HG, Parson W, Utermann G. Genetics of the Lp(a)/apo(a) system in an autochthonous Black African population from the Gabon. Eur J Hum Genet 2005; 14:190-201. [PMID: 16267501 DOI: 10.1038/sj.ejhg.5201512] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Plasma lipoprotein(a) (Lp(a)) is a quantitative trait associated with atherothrombotic disease in European and Asian populations. Lp(a) concentrations vary widely within and between populations, with Africans exhibiting on average two- to threefold higher Lp(a) levels and a different distribution compared to Europeans. The apo(a) gene locus on chromosome 6q26-27 (LPA, MIM 152200) has been identified as the major quantitative trait locus (QTL) for Lp(a) concentrations in Europeans and populations of African descent (North American and South African Blacks) but data on autochthonous Black Africans are lacking.Here, we have analysed Lp(a) plasma concentrations, apo(a) isoforms in plasma and four polymorphisms in the LPA gene in 31 African families with 54 children from Gabon. Weighted midparent-offspring regression estimated a heritability h2=0.76. The correlation of Lp(a) levels associated with LPA alleles identical by descent (IBD) resulted in a heritability estimate of 0.801. Our data demonstrate that Lp(a) concentrations are highly heritable in a Central African population without admixture and high Lp(a) (median 43 mg/dl). LPA is the major QTL, explaining most or all of the heritability of Lp(a) in this population.
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Affiliation(s)
- Konrad Schmidt
- Division of Human Genetics, Department of Medical Genetics, Molecular and Clinical Pharmacology, Innsbruck Medical University, Innsbruck, Austria
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Abstract
Background—
Elevated plasma levels of lipoprotein(a) [Lp(a)] are an independent risk factor for cardiovascular disease in whites. Blacks have 2- to 3-fold higher plasma levels of Lp(a) than whites and yet do not have a correspondingly higher rate of coronary events. It remains unclear whether elevated plasma levels of Lp(a) are an independent risk factor for coronary atherosclerosis in individuals of African descent.
Methods and Results—
The relationship between plasma levels of Lp(a), apolipoprotein(a) isoform sizes, and the presence of coronary calcium was examined in 761 blacks and 527 whites (men aged >40 years, women aged >45 years) from a population-based sample. No relationship was found between plasma levels of Lp(a), apolipoprotein(a) isoform size, or a combination of these 2 variables and coronary artery calcium (CAC) in whites or blacks. No correlation was observed between plasma levels of Lp(a) and coronary calcium scores in any group, although all black men with very high plasma levels of Lp(a) (>300 μmol/L; n=7) were CAC-positive. Whites with high plasma levels of Lp(a) plus elevated plasma levels of LDL cholesterol (men) or reduced levels of HDL cholesterol (men and women) or who smoked (women) had a higher prevalence of CAC. In contrast, no joint effects between plasma levels of Lp(a) and other cardiovascular risk factors on coronary calcium were found in blacks.
Conclusions—
No consistent independent relationship between plasma levels of Lp(a) or apolipoprotein(a) isoform size and coronary calcium was found in whites or blacks.
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Affiliation(s)
- Rudy Guerra
- Donald W. Reynolds Center for Clinical Cardiovascular Research, Dallas, Tex, USA
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Obisesan TO, Aliyu MH, Adediran AS, Bond V, Maxwell CJ, Rotimi CN. Correlates of serum lipoprotein (A) in children and adolescents in the United States. The third National Health Nutrition and Examination Survey (NHANES-III). Lipids Health Dis 2004; 3:29. [PMID: 15601478 PMCID: PMC544891 DOI: 10.1186/1476-511x-3-29] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2004] [Accepted: 12/16/2004] [Indexed: 01/19/2023] Open
Abstract
Objective To determine the correlates of serum lipoprotein (a) (Lp(a)) in children and adolescents in the United States. Methods Cross-sectional study using representative data from a US national sample for persons aged 4–19 years participating in The Third National Health Nutrition and Examination Survey (NHANES-III). Results We observed ethnicity-related differences in levels of Lp(a) > 30 mg/dl, with values being markedly higher in African American (black) than nonhispanic white (white) and Mexican American children in multivariate model (P < 0.001). Higher levels of Lp(a) > 30 mg/dl associated with parental history of body mass index and residence in metro compared to nonmetro in Blacks, and high birth weight in Mexican American children in the NHANES-III. In the entire group, total cholesterol (which included Lp(a)) and parental history of premature heart attack/angina before age 50 (P < 0.02) showed consistent, independent, positive association with Lp(a). In subgroup analysis, this association was only evident in white (P = 0.04) and black (P = 0.05) children. However, no such collective consistent associations of Lp(a) were found with age, gender, or birth weight. Conclusion Ethnicity-related differences in mean Lp(a) exist among children and adolescents in the United States and parental history of premature heart attack/angina significantly associated with levels of Lp(a) in children. Further research on the associations of Lp(a) levels in childhood with subsequent risk of atherosclerosis is needed.
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Affiliation(s)
- Thomas O Obisesan
- Section of Geriatrics, Department of Medicine, Howard University Hospital, Washington, USA
| | - Muktar H Aliyu
- Department of Epidemiology, University of Alabama at Birmingham, USA
| | - Abayomi S Adediran
- Section of Geriatrics, Department of Medicine, Howard University Hospital, Washington, USA
| | - Vernon Bond
- Department of Human Health & Leisure Studies, Howard University, Washington, USA
| | - Celia J Maxwell
- Institute for Women's Health, Howard University Hospital, Washington, USA
| | - Charles N Rotimi
- National Human Genome Center Genetic Epidemiology Unit, Department of Microbiology, Howard University, Washington, USA
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Luke A, Cooper RS, Prewitt TE, Adeyemo AA, Forrester TE. NUTRITIONALCONSEQUENCES OF THEAFRICANDIASPORA. Annu Rev Nutr 2001; 21:47-71. [PMID: 11375429 DOI: 10.1146/annurev.nutr.21.1.47] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Along with their foods and dietary customs, Africans were carried into diaspora throughout the Americas as a result of the European slave trade. Their descendants represent populations at varying stages of the nutrition transition. West Africans are in the early stage, where undernutrition and nutrient deficiencies are prevalent. Many Caribbean populations represent the middle stages, with undernutrition and obesity coexisting. African-Americans and black populations in the United Kingdom suffer from the consequences of caloric excess and diets high in fat and animal products. Obesity, non-insulin-dependent diabetes mellitus, hypertension, coronary heart disease, and certain cancers all follow an east-to-west gradient of increasing prevalence. Public health efforts must focus not only on eradicating undernutrition in West Africa and the Caribbean but also on preventing obesity, hypercholesterolemia, and their consequences. Fortunately, a coherent and well-supported set of recommendations exists to promote better nutrition. Implementation of it founders primarily as a result of the influence of commercial and political interests.
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Affiliation(s)
- A Luke
- Department of Preventive Medicine and Epidemiology, Loyola University School of Medicine, Maywood, Illinois 60153, USA.
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