Association Between NsiI and PmLI Insulin Receptors on the Development of Polycystic Ovarian Syndrome

<b>Background and Objective:</b> Polycystic Ovarian Syndrome (PCOS) is a hormonal abnormality that influences the age during reproduction. This investigation aimed to identify the impact of insulin receptor-encoding genes (NsiI and PmLI) on the development of PCOS and their effect on insulin and HOMA-IR levels. <b>Materials and Methods:</b> The study included 80 patients and 25 healthy individuals. The concentrations of HOMA-IR, fasting blood sugar and fasting insulin hormone were determined. The PCR-RFLP was applied to identify insulin receptors in the NsiI and PmLI SNPs. Sanger sequencing was used for each of these patients. The study data were analyzed using SPSS version 16.0 and using χ² test p<0.05 was considered statistically significant. Also, Hardy-Weinberg equilibrium for genotype frequencies was used. <b>Results:</b> The HOMA-IR and mean insulin levels significantly differed between the control subjects and PCOS females ("p = 0.002 and "p = 0.000, correspondingly). Concerning the odds ratio and their NsiI frequency polymorphisms in the heterozygote genotype A/G and homozygote mutant G/G groups were greater in PCOS than control individual (OR = 1.14, p>0.05) (OR = 5.20, p>0.05). However, for the PmLI polymorphism, CC and TT were linked with pathogenic effects for PCOS susceptibility (OR = 1.83, p>0.05) (OR = 12.07, p>0.05) and CT was a protective factor (OR = 0.22, p<0.05). <b>Conclusion:</b> A strong relationship between high levels of hormone insulin as well as elevated HOMA-IR has been found in women with PCOS. Furthermore, INSR gene polymorphisms may be a molecular marker associated with decreased insulin sensitivity in women with PCOS.