[Association of the calpain-10 gene polymorphism with glucose metabolism disorder in pregnant women].

To study three single nucleotide polymorphisms (SNP), SNP-43, -19 and -63 of calpain-10 (CAPN10) gene in pregnant women with glucose metabolism disorders and their relationship with the risk of these disorders. Totally, 270 pregnant women including 156 with an abnormal oral glucose tolerance test (study group) and 114 healthy controls were selected among those delivered at the Department of Obstetrics and Gynecology, Peking University First Hospital from Jan. 2005 to Dec. 2006. The SNP of CAPN10 gene at positions 43, 19, and 63 were analyzed by primer-introduced restriction analysis-polymerase chain reaction (PIRA-PCR). (1) The frequencies CAPN10 SNP-19 2R/2R genotype (26.9%, 42/156) and 2R allele (48.9%, 152/312) were higher than those in controls (12.3%, 14/114 and 36.8%, 84/228, respectively; P=0.012, 0.006). (2) Stratified analysis according to family history of diabetes mellitus showed the proportion of the CAPN10 SNP-19 2R/2R+2R/3R genotypes (83%, 47/57) in the study group were significantly higher than that of control group (52%, 11/21; P=0.009), and the proportion of SNP-63 T/T+T/C genotypes (47%, 27/57) in study group were significantly higher than that of control group (14%, 3/21; P=0.026) among those with positive family history. (3) The combined effect of CAPN10 SNP-43, -19 and -63 on glucose metabolism disorders was analyzed by comparing with the other haplotypes and showed that the haplotype 121 distribution in study group was significantly higher than those in controls (P=0.036), and 221 haplotype was significantly lower than controls (P=0.042). (1) CAPN10 SNP-19 is associated with glucose metabolism disorders in pregnant women. And 2R allele might be the risk factor. CAPN10 SNP-19 2R/2R+2R/3R and SNP-63 T/T+T/C genotypes might increase the risk of glucose metabolism disorders in women with positive family history. Haplotype 121 might increase the risk of glucose metabolism disorders in pregnant women and 221 be a protective factor.