Microsatellite variation of ESR1, ESR2, and AR in Serbian women with primary ovarian insufficiency

Abstract

Objective: This study aimed to investigate the potential role of microsatellite polymorphisms of the estrogen receptor alpha gene (ESR1) TA repeat, estrogen receptor beta gene (ESR2) CA repeat, and androgen receptor gene (AR) CAG and GGN repeats among Serbian women with primary ovarian insufficiency (POI). These microsatellites have been reported to be associated with POI in different racial/ethnic populations.

Methods: A cohort of 196 POI cases matched with 544 fertile controls was recruited by the Institute for Endocrinology, Diabetes and Metabolic Disorders of Serbia between 2007 and 2010. DNA was extracted from saliva. The four microsatellites were genotyped using a PCR-based assay to determine the repeat lengths.

Results: POI patients carried shorter repeat lengths of ESR2 (CA)_n than controls (P = 0.034), but the difference was small. ESR1 (TA)_n was on the borderline of statistical differences between groups (P = 0.059). AR (CAG)_n and (GGN)_n showed no association with POI.

Conclusions: We cautiously conclude that microsatellite polymorphisms of gonadal steroid receptor genes might contribute to the genetic basis of POI in Serbian women, but a larger-scale study and family-based studies are warranted to validate our findings even though the sample size in this study is larger than any previously published in this field.

Keywords:

• Primary ovarian insufficiency
• premature ovarian failure
• estrogen receptor
• androgen receptor
• microsatellite polymorphism

Authors’ roles

J.L. contributed to the study design, data analysis and manuscript preparation; R.D. contributed to the study design and edited the manuscript; S.V., S.D-D., M.I., M.I. and M.T. contributed to the clinical sample collection, biochemical analyses and assembly of data; J.T. contributed to statistical analysis of the data; F.A-A. contributed to the study design and participated in the critical discussion.

Conflict of interest

No potential conflict of interest was reported by the authors.

Source of funding

This study was supported by a grant from the Institute of Women’s Health Charity, Leicester, UK.