Revista Brasileira de Ginecologia e Obstetrícia (Apr 2005)

Avaliação dos efeitos do estradiol e do FSH nos níveis de leptina em mulheres com supressão da função hipofisária Effects of estradiol and FSH on leptin levels in women with pituitary suppression

  • Selmo Geber,
  • Marcos Sampaio

DOI
https://doi.org/10.1590/S0100-72032005000400009
Journal volume & issue
Vol. 27, no. 4
pp. 216 – 221

Abstract

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OBJETIVO: identificar a correlação entre os níveis séricos de leptina e os níveis de estradiol e do hormônio folículo-estimulante (FSH) em mulheres com supressão da função hipofisária, e suas possíveis interferências no eixo reprodutivo. MÉTODOS: estudamos prospectivamente 64 pacientes submetidas à hiperestimulação ovariana controlada com FSH recombinante para tratamento pela técnica de reprodução assistida, devido a fator masculino ou tubário, e 20 pacientes em uso de valerato de estradiol, para preparo endometrial, em tratamento de doação de óvulos, por falha de resposta ovariana em ciclo prévio. Todas as pacientes utilizaram análogo de GnRH no início do tratamento, de forma a obter a supressão da função hipofisária. Para a análise estatística dos resultados, foram utilizados os testes chi2, t de Student e correlação de Pearson, quando adequado. Os resultados foram considerados significativos quando pPURPOSE: to identify the relationship between serum levels of leptin and the levels of estradiol and follicle-stimulating hormone (FSH) in women with pituitary suppression and to evaluate its possible interference on the reproductive axis. METHODS: a total of 64 patients submitted to controlled ovarian hyperstimulation with recombinant FSH for assisted reproduction, due to a male or tubal factor, and 20 patients using estradiol valerate, for endometrial preparation in order to be submitted to oocyte donation treatment were studied. All patients used GnRH analogues before starting treatment in order to avoid premature LH surge. Data were analyzed statistically by the chi2 test, Student's t-test and the Pearson correlation test, when appropriate, with the level of significance set at p<0,05. RESULTS: it was observed that leptin levels correlated with body mass index (BMI) even though they had not influenced growth rate of these hormones. A positive correlation was observed between estradiol and leptin levels in both groups, as leptin levels increased from 10.42 to 15.68 ng/mL in the FSH group and from 11.09 to 14.5 ng/mL in the estradiol group, following estradiol increase. The growth rate of leptin was higher in women with higher estradiol levels, i.e., who had induced cycles with recombinant FSH, than in those who received estradiol valerate (159.60±58.01 and 136.73±34.17, respectively). CONCLOSION: we may state that leptin correlated with BMI and that both FSH and estradiol do interfere in the regulation of leptin production in women.

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