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Journal of the American Society of Nephrology, Vol 3, 1467-1473, Copyright © 1993 by American Society of Nephrology

REGULAR ARTICLES

Racial variation in human leukocyte antigen frequency in insulin- dependent diabetic nephropathy. The South-Eastern Organ Procurement Foundation

BI Freedman, MA Espeland, ER Heise, J Evans and VJ Canzanello
Department of Medicine, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, NC 27157-1053.

Black patients with insulin-dependent diabetes mellitus are at increased risk for the development of diabetic nephropathy compared with white patients. To determine if genetic differences associated with the HLA system account for racial variation in insulin-dependent diabetes mellitus-induced nephropathy, serologically defined HLA phenotypes from renal transplant recipients and donors in the South- Eastern Organ Procurement Foundation database from 1982 to 1986 were analyzed. Renal transplant recipients (N = 1,531) with insulin- dependent diabetes mellitus-induced renal failure as the cause of ESRD (patients) were compared with 4,506 race-matched, nondiabetic cadaveric kidney donors (controls). Log-linear models were used to assess the relationship between insulin-dependent diabetes mellitus-induced renal failure and prevalence of each HLA phenotype. Bonferroni adjustments of P values were used to correct for multiple comparisons. A comparison of HLA frequencies in patients with insulin-dependent diabetes mellitus- induced renal failure demonstrated the presence of racial differences beyond those normally present between the black and white populations. Blacks, compared with whites, had increased frequencies of HLA-B62 (odds ratio [OR] black:white, 6.13:1.97; P < 0.02) and HLA-DR9 (OR black:white, 4.82:1.57; P < 0.008) and decreased frequencies of HLA-A1 (OR white:black, 1.56:0.8; P < 0.008) and HLA-DR3 (OR white:black, 4.9:2.82; P < 0.004). These results suggest that differences in HLA frequency may account, in part, for the observed racial variation in incidence of diabetic nephropathy. In addition, several antigens in positive and negative association with diabetic nephropathy were identified within each race.




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Copyright © 2008 by the American Society of Nephrology. Online ISSN: 1533-3450 Print ISSN: 1046-6673