Correlation between PPAR? protein expression level in granulosa cells and pregnancy rate in IVF program.

Abstract

Peroxisome proliferative-activated receptors (PPARs) are nuclear receptors that involved in cellular lipid metabolism and differentiation. The subtype ? of the PPAR family (PPAR?) plays important roles in physiologic functions of ovaries.To determine correlation between PPAR? protein level in granulosa cells and pregnancy rate in women undergoing in-vitro fertilization (IVF) treatment.In this cross-sectional study, twenty-five samples of granulosa cells were collected from women referred to an IVF treatment center. PPAR? protein expression level in granulosa cells was determined in comparison with ?-actin level as control gene with Western blot test. Laboratory pregnancy was determined by a rise in blood ?-hCG level fourteen days after embryo transfer. Correlation analyses were used to test for associations between the oocytes and pregnancy occurrence as outcome variables and PPAR? protein expression level.Correlation analysis indicated that there was no significant relationship between granulosa cells PPAR? protein level with IVF parameters including number of matured oocytes and the ratio of fertilized to matured oocytes. Comparison of granulosa cells PPAR? protein level with positive and negative laboratory pregnancy revealed also no significant relationship.According to the results of this study, PPAR? protein level in granulosa cells could not be directly correlated to the success rate of IVF.