[Expression of leptin and long form of leptin receptors messenger ribonucleic acid and protein in endometrium of patients with polycystic ovary syndrome].

Objective: To study the expression of leptin and long form of leptin receptors (Ob-R(L)) messenger ribonucleic acid (mRNA) and protein in endometrium during mid-luteal phase of patients with polycystic ovary syndrome (PCOS).
Methods: The expression of leptin and Ob-R(L) mRNA in endometrium during mid-luteal phase from 15 normal controls and 14 PCOS related anovulatory patients who underwent ovulation induction therapy were studied by in situ hybridization, and levels of leptin and Ob-R(L) protein were investigated by immunohistochemical methods.
Results: The expression of Ob-R(L) mRNA and protein in endometrial glands of most patients with PCOS were weak or moderate positive, whereas the levels of Ob-R(L) mRNA and protein were moderate or strong positive in those of the controls, there was significant difference between the two groups; leptin mRNA and protein expression in endometrium of patients with PCOS and controls were not significantly different between the groups.
Conclusion: The expression of Ob-R(L) decreased in endometrium of mid-luteal phase in patients with PCOS during induced ovulation, which may be related to low pregnancy rate of patients with PCOS.