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Genetics factors contributing to type 2 diabetes across ethnicities
1University of Arkansas for Medical Sciences, Little Rock, and Central Arkansas Veterans Healthcare System, Little Rock, Arkansas, USA. ElbeinStevenC@uams.edu
Journal of Diabetes Science and Technology
|February 11, 2010
Summary
Genetic research has identified more variants for type 2 diabetes mellitus (T2DM), but their small individual effects explain little genetic risk. Discoveries are limited, particularly in minority populations like African Americans.
Area of Science:
- Genetics
- Endocrinology
- Metabolic Diseases
Background:
- Type 2 diabetes mellitus (T2DM) has a significant genetic basis, with numerous causative variants previously undiscovered.
- Recent genomic advancements have enabled the identification of multiple genetic variants associated with T2DM and fasting glucose levels.
Purpose of the Study:
- To review the progress in identifying genetic variants contributing to T2DM.
- To assess the impact of identified variants on overall genetic risk and population-specific findings.
Main Methods:
- Genome-wide association studies (GWAS) and other high-throughput genotyping technologies.
- Analysis of genetic variation across diverse populations, including European, Asian, and African American cohorts.
Main Results:
- The number of known T2DM-associated genes has increased significantly, with 19 genes now identified.
- The cumulative effect of identified variants explains a small proportion of the genetic risk for T2DM.
- Genetic discovery has been most successful in European populations, with limited success in U.S. minority groups.
Conclusions:
- Identified genetic variants underscore the role of beta-cell dysfunction in T2DM pathogenesis.
- Significant challenges remain in achieving accurate genetic prediction and personalized medicine for T2DM due to small variant effects and population disparities.
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