Diabetes 54:1207-1213, 2005
© 2005 by the American Diabetes Association, Inc.
ENPP1/PC-1 K121Q Polymorphism and Genetic Susceptibility to Type 2 Diabetes
Nicola Abate1,
Manisha Chandalia1,
Pankaj Satija1,
Beverley Adams-Huet2,
Scott M. Grundy1,
Sreedharan Sandeep3,
Venkatesan Radha3,
Raj Deepa3, and
Viswanathan Mohan3
1 Department of Medicine, Division of Endocrinology and Metabolism and the Center for Human Nutrition, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
2 Center for Biostatistics and Clinical Science, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
3 M.V. Diabetes Specialties Centre and Madras Diabetes Research Foundation, Gopalapuram, Chennai, India
Genetic susceptibility modulates the impact of obesity on risk for type 2 diabetes. The present study evaluates the role of ENPP1 K121Q polymorphism in prediction of type 2 diabetes in three populations that differ in susceptibility to diabetes and environmental exposure. The three cohorts included 679 nonmigrant South Asians living in Chennai, India (223 with type 2 diabetes); 1,083 migrant South Asians living in Dallas, Texas (121 with type 2 diabetes); and 858 nonmigrant Caucasians living in Dallas, Texas (141 with type 2 diabetes). Patients with type 2 diabetes were included in these cohorts if they had diabetes onset before the age of 60 years. The prevalence of subjects carrying the polymorphic ENPP1 121Q allele was 25% in the nondiabetic group and 34% in the diabetic group of South Asians living in Chennai (P = 0.01). The prevalence in the nondiabetic and diabetic groups were 33 and 45% (P = 0.01) for the South Asians living in Dallas and 26 and 39% (P = 0.003) for the Caucasians. Although further replication studies are necessary to test the validity of the described genotype-phenotype relationship, our study supports the hypothesis that ENPP1 121Q predicts genetic susceptibility to type 2 diabetes in both South Asians and Caucasians.
Address correspondence and reprint requests to Nicola Abate, MD, UT Southwestern Medical Center, 6011 Harry Hines Blvd., Dallas, Texas 75390-9169. E-mail: nicola.abate{at}utsouthwestern.edu

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Copyright © 2005 by the American Diabetes Association.
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