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Diabetes Care, Vol 19, Issue 5 446-449, Copyright © 1996 by American Diabetes Association

ARTICLES

No association between the Gly971Arg variant of the insulin receptor substrate 1 gene and NIDDM in the Taiwanese population

LM Chuang, CS Lai, JI Yeh, HP Wu, TY Tai and BJ Lin
Department of Internal Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan. leeming@ntumc1.mc.ntu.edu.tw

OBJECTIVE--To study the role of the Gly971Arg variant of the insulin receptor substrate 1 (IRS-1) gene in the development of NIDDM in the Chinese population living in Taiwan. RESEARCH DESIGN AND METHODS--A total of 82 unrelated normal control subjects, 89 subjects with NIDDM, and 23 multiplex families were recruited in Taiwan. All of them were Han Chinese. Pedigree members without a history of diabetes were studies by the standard 75-g oral glucose tolerance test. Detection of the Gly971Arg variant of the IRS-1 gene was performed by polymerase chain reaction and restriction fragment-length polymorphism analysis. RESULTS--The frequency of Gly971Arg variant of the IRS-1 gene in the normal population was 1.2% which was lower than frequencies reported in white populations. The prevalence of the Gly971Arg variant was not significantly increased in both the nonselected NIDDM population (1.1%) and the probands of the multiplex families (4.3%). More importantly, the Gly971Arg variant of the IRS-1 gene did not cosegregate with BMI and NIDDM in these families, CONCLUSIONS--The Gly971Arg variant of the IRS-1 gene is an infrequent normal allele among Taiwanese. This variant is neither associated nor cosegregated with NIDDM in the Taiwanese population and families. Gly971Arg of IRS-1 gene does not play an important role in the development of NIDDM in this population.
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Copyright © 1996 by the American Diabetes Association.