Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2007 Jul;92(7):2462-7.
doi: 10.1210/jc.2006-2467. Epub 2007 Apr 17.

Etiology of Early-Onset Type 2 Diabetes in Indians: Islet Autoimmunity and Mutations in Hepatocyte Nuclear Factor 1alpha and Mitochondrial Gene

Affiliations

Etiology of Early-Onset Type 2 Diabetes in Indians: Islet Autoimmunity and Mutations in Hepatocyte Nuclear Factor 1alpha and Mitochondrial Gene

Ravi P Sahu et al. J Clin Endocrinol Metab. .

Abstract

Context: Indians are at high risk of developing type 2 diabetes mellitus (T2DM) at an early age, despite their lower body mass index. Studies on the etiology of patients presenting as early-onset T2DM in this racial group are not available.

Objective: The objective was to delineate the clinical features in young Indian patients with T2DM and to determine the role of mutations in the hepatocyte nuclear factor 1alpha (HNF1alpha) gene [MODY3 (maturity-onset diabetes of the young, type 3)], mitochondrial A3243G mutation, and islet autoimmunity in its etiology.

Design: This was an observational cohort study.

Setting: The setting was an outpatient diabetes clinic in a teaching hospital.

Patients: Ninety-six consecutive young patients with T2DM (onset, <or=30 yr) were included in the study.

Interventions: Glutamic acid decarboxylase and insulinoma antigen 2 antibodies, mitochondrial A3243G mutation, and the common HNF1alpha mutation P291fsinsC were measured in all patients. The entire HNF1alpha gene was studied for mutations in 32 subjects with onset less than 25 yr or with normal weight. The common HNF1alpha A98V polymorphism was studied in 91 patients.

Results: The patients were clinically heterogeneous, with 42% having a normal body mass index. Glutamic acid decarboxylase antibodies were present in three (3%) subjects and mitochondrial A3243G mutation in one (1%) subject. The P291fsinsC mutation was not detected in any patient. A MODY3 mutation (R200W) was detected in one patient (3%). In this family, diabetes cosegregated with the R200W mutation in the proband and his youngest brother but not in three paternal uncles. The Val 98 allele was associated with T2DM (allele frequency, 0.14 vs. 0.03 in controls; odds ratio, 5.2; P < 0.001).

Conclusions: Despite a significant proportion of young Indian patients with T2DM having normal weight, islet autoimmunity, A3243G mitochondrial, and HNF1alpha gene mutations were infrequent.

Similar articles

See all similar articles

Cited by 6 articles

See all "Cited by" articles

Publication types

MeSH terms

Feedback