OBJECTIVETo investigate the relationship between adiponectin receptor 1 gene (ADIPOR1) single nucleotide polymorphism (SNP) and glucose metabolism and insulin resistance in the Chinese.

METHODSThe genotypes of -3881T/C of ADIPOR1 were determined through polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) in 664 Chinese in Shanghai. Among them, 370 were subjects with normal glucose tolerance and 294 were newly diagnosed diabetic patients without taking any drug. Phenotype measured were: height, weight to calculate body mass index; systolic blood pressure and diastolic blood pressure; plasma glucose level, serum insulin and C-peptide levels of blood obtained both at 0 and 120 minute during a standard 75-gram glucose oral glucose tolerance test. Insulin resistance and beta cell function were assessed by homeostasis model assessment (HOMA-IR and HOMA-B).

RESULTS(1) The frequencies of two alleles did not differ between the type 2 diabetic patients and ones with normal glucose tolerance (P is 0.6749). (2) The frequency of C allele is significantly lower in type 2 diabetic patients with insulin resistance compare with those without insulin resistance (P is 0.0121). (3) In type 2 diabetic patients, the C allele carriers had a significantly lower diastolic blood pressure (P is 0.0466) and HOMA-IR (P is 0.0498). (4) In subjects with normal glucose tolerance, the C allele carriers had a significantly lower fasting plasma glucose (P is 0.0140).

CONCLUSIONThese findings suggest that variant of ADIPOR1 plays a role in glucose metabolism and insulin resistance in the Chinese.