Objective To investigate a possible role of orexin in the regulation of estrous cycle by examining the expression of orexin and orexin receptors(OX1R,OX2R) in the rat hypothalamus during the estrous cycle.

• 目的观察大鼠发情周期各期下丘脑中食欲素及其受体(OX1R、OX2R)表达的变化,探讨食欲素对发情周期的可能调节作用。