Our findings suggest that IRS-1 Gly972Arg polymorphism is associated with PCOS in the Caucasian ethnicity, and IRS-2Gly1057Asp polymorphism is correlated with PCOS in the Asian ethnicity.
We further investigated the effect of interaction of IRS-1 Gly972Arg and IRS-2Gly1057Asp on the risk of PCOS and found that women carried IRS-1 Gly/Arg or IRS-2 Asp/Asp or carried both IRS-1 Gly/Arg and IRS-2 Asp/Asp had a much higher risk of PCOS compared with their counterpart, respectively (OR 2.49, 95% C.I.
No statistically significant differences in the prevalence of IRS-1 Gly972Arg or IRS-2Gly1057Asp polymorphisms or any combination of both were observed between controls and PCOS patients (P > 0.02).
These results suggest that the IRS-2Gly(1057)Asp polymorphism influences blood glucose levels in nondiabetic white and African-American women with PCOS.
These results suggest that the IRS-2Gly(1057)Asp polymorphism influences blood glucose levels in nondiabetic white and African-American women with PCOS.
We conclude that polymorphic alleles of both IRS-1 and IRS-2, alone or in combination, may have a functional impact on the insulin-resistant component of PCOS.