Diabetes, Vol 44, Issue 4 478-481, Copyright © 1995 by American Diabetes Association

ARTICLES

Evidence for linkage between a region on chromosome 1p and the acute insulin response in Pima Indians

DB Thompson, RC Janssen, VM Ossowski, M Prochazka, WC Knowler and C Bogardus
Phoenix Epidemiology and Clinical Research Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Phoenix, Arizona 85016.

A low acute insulin response (AIR) is a predictor of non-insulin-dependent diabetes mellitus (NIDDM) in insulin-resistant Pima Indians. We have initiated a search for regions of the genome linked with the AIR using sib-pair linkage analysis as a first step in identifying genes that are determinants of this phenotype. Eighteen short tandem-repeat polymorphisms from chromosome 1 were genotyped in over 900 Pima Indians and tested for linkage with NIDDM and in a subset of Pima Indians for linkage with AIR. The anonymous DNA marker D1S198 on chromosome 1p was linked with AIR (P = 0.000056) in 175 sib pairs from 60 families, all with normal glucose tolerance, but no linkage was observed between D1S198 and NIDDM (P = 0.44, 996 sib pairs). Additional markers genotyped on chromosome 1 did not show linkage with AIR or NIDDM. This study indicates that a locus on chromosome 1p may be a determinant of the phenotypic variation seen in the AIR.
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