Diabetes Care, Vol 17, Issue 12 1491-1494, Copyright © 1994 by American Diabetes Association

ARTICLES

Genes within the major histocompatibility complex predict NIDDM in African-American women in Alabama

RT Acton, JM Roseman, DS Bell, RL Goldenberg, ML Tseng, C Vanichanan, LA Harman and RC Go
Department of Microbiology, University of Alabama at Birmingham.

OBJECTIVE--To test the hypothesis that genes within the major histocompatibility complex (MHC) are associated with gestational diabetes mellitus (GDM) and, subsequently, non-insulin-dependent diabetes mellitus (NIDDM) in African-American women. RESEARCH DESIGN AND METHODS--African-American women who presented with GDM were compared with pregnant African-American control subjects. Following pregnancy, GDM patients were assessed at various intervals of time (median = 6 years) to determine whether they had developed diabetes. RESULTS--GDM patients who required insulin during pregnancy possessed a significantly higher frequency of A33, DR2, DR9, and BF-S phenotypes than control subjects. GDM patients who subsequently developed NIDDM had a significantly higher frequency of B41, DR2, and BF-S and a lower frequency of DR1 and DR6 phenotypes than control subjects. Even after controlling for age and body mass index, B41 and DR2 were independent predictors of developing insulin-requiring GDM and NIDDM in GDM subjects. CONCLUSIONS--These results suggest that either one or more genes within the MHC are involved in the etiology of NIDDM.
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