RESUMO
OBJECTIVE: The aim: To evaluate the association between estrogen receptor (ESR1) α- Xbal polymorphism with estradiol serum blood level in the patients with premenstrual syndrome. PATIENTS AND METHODS: Materials and methods: 50 women with premenstrual syndrome and 20 controls were examined. The level of estradiol was measured in the blood serum in both phases of the menstrual cycle by ELISA method. Polymerase chain reaction was used to study ESR1 gene polymorphism (A-351G variant). RESULTS: Results: The estradiol concentration was similar in two phases of the menstrual cycle between healthy women and patients with premenstrual syndrome. But the more growth of estradiol in the luteal phase was determined in the persons with premenstrual syndrome. The rate of GG genotype was the largest in women with severe premenstrual syndrome (χ2=3.52, p=0.06). Also, in the persons with severe premenstrual syndrome who had G allele (GG+AG genotype) the estradiol concentration in the luteal phase of the menstrual cycle was on 50.00 % (p=0.02) higher compared to carriers of AA genotype. There was no difference in estradiol level between healthy women with GG+AG genotype and AA genotype. CONCLUSION: Conclusions: AG polymorphism of ESR1 gene may be the marker of development of premenstrual syndrome.