Journal
DIGESTIVE DISEASES AND SCIENCES
Volume 61, Issue 5, Pages 1214-1225Publisher
SPRINGER
DOI: 10.1007/s10620-016-4143-0
Keywords
Epidemiology, obesity, African-Americans (AAs), nonalcoholic fatty liver disease (NAFLD); Nonalcoholic steatohepatitis (NASH); Insulin resistance (IR); Metabolic syndrome (MetS)
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Funding
- National Cancer Institute and the National Institutes of Health [1U01CA185188-01A1]
- RCMI
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Background Non-alcoholic fatty liver disease (NAFLD) is a clinical syndrome predicted to be the next global epidemic affecting millions of people worldwide. The natural course of this disease including its subtype, non-alcoholic steatohepatitis (NASH), is not clearly defined especially in the African-American segment of the US population. Aims To conduct a review of the global epidemiology of NAFLD with emphasis on US minority populations. Methods A thorough search of evidence-based literature was conducted using the Pubmed database and commercial web sources such as Medscape and Google Scholar. Results NAFLD and its subtype NASH are becoming the principal cause of chronic liver disease across the world. In the US, Hispanics are the most disproportionately affected ethnic group with hepatic steatosis, and elevated aminotransferase levels, whereas African-Americans are the least affected. Genetic disparities involved in lipid metabolism seem to be the leading explanation for the lowest incidence and prevalence of both NAFLD and NASH in African-Americans. Conclusions The unprecedented rise in the prevalence of NAFLD globally requires an initiation of population cohort studies with long-term follow-up to determine the incidence and natural history of NAFLD and its underrepresentation in African-Americans. Future studies should also focus on the delineation of the interplay between genetic and environmental factors that trigger the development of NAFLD and NASH.
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