title: ENPP1/PC-1 K121Q polymorphism and genetic susceptibility to type 2 diabetes.
abstract: 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.
authors.affiliation: Department of Medicine, Division of Endocrinology and Metabolism and the Center for Human Nutrition, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390-9169, USA. nicola.abate@utsouthwestern.edu <nicola.abate@utsouthwestern.edu>
authors.forename: Nicola
authors.initials: N
authors.lastname: Abate
authors.forename: Manisha
authors.initials: M
authors.lastname: Chandalia
authors.forename: Pankaj
authors.initials: P
authors.lastname: Satija
authors.forename: Beverley
authors.initials: B
authors.lastname: Adams-Huet
authors.forename: Scott M
authors.initials: SM
authors.lastname: Grundy
authors.forename: Sreedharan
authors.initials: S
authors.lastname: Sandeep
authors.forename: Venkatesan
authors.initials: V
authors.lastname: Radha
authors.forename: Raj
authors.initials: R
authors.lastname: Deepa
authors.forename: Viswanathan
authors.initials: V
authors.lastname: Mohan
mesh_terms: D000328:Adult; D044466:Asian People / Q000235:genetics; D003924:Diabetes Mellitus, Type 2 / Q000235:genetics*; D004777:Environment; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000235:genetics; D010641:Phenotype; D010727:Phosphoric Diester Hydrolases / Q000235:genetics*; D011110:Polymorphism, Genetic; D011755:Pyrophosphatases / Q000235:genetics*; D012307:Risk Factors; D013781:Texas; D044465:White People / Q000235:genetics
chemical_list: D010727:Phosphoric Diester Hydrolases; C065962:ectonucleotide pyrophosphatase phosphodiesterase 1; D011755:Pyrophosphatases