菟丝子黄酮对心理应激雌性大鼠下丘脑β-EP与腺垂体FSH、LH的影响

目的:探讨菟丝子黄酮调节卵巢内分泌功能的机理。方法:(1)菟丝子经溶剂提取,聚酰胺柱分离得总黄酮提取物;(2)采用声-光-电复合应激刺激造成大鼠心理应激;(3)观察菟丝子黄酮对心理应激大鼠下丘脑β-EP与腺垂体FSH、LH的影响及腺垂体形态学变化。结果:心理应激大鼠下丘脑β-EP水平明显升高,菟丝子黄酮明显降低心理应激大鼠下丘脑β-EP含量;提高腺垂体嗜碱性细胞数量及LH含量,但对腺垂体FSH含量没有明显影响。结论:下调心理应激大鼠下丘脑神经递质β-EP,上调腺垂体LH水平,可能是菟丝子黄酮调节下丘脑-垂体-卵巢轴功能的机理之一。

Effects of Flavonoids from Semen Cuscutae on Changes of β-EP in Hypothalamuses and FSH and LH in Anterior Pituitaries in Female Rats Exposed to Psychologic Stress

OBJECTIVE: To study the mechanism of flavonoids from Semen Cuscutae (FSC) improving the ovarian endocrine functions. METHODS: (1) FSC were obtained from the semen of Cuscuta chinensis through solvent extraction and polyamide columnar chromatography. (2) Sound, light and electricity were combined into a stressful stimulas to induce psychologic stress in female rats. (3) To observe the effects of FSC on the changes of beta-EP in hypothalamuses, FSH and LH in anterior pituitaries and the changes in pituitary morphology in female rats exposed to psychologic stress. RESULTS: FSC decreased the content of beta-EP in hypothalamuses, and increased the numbers of basophilic cell and content of LH in anterior pituitaries, didn't change content of FSH in anterior pituitaries in female rats exposed to psychologic stress. CONCLUSION: FSC decreases the contents of beta-EP in hypothalamuses and increases contents of LH in anterior pituitaries in female rats exposed to psychologic stress, which may be one of the mechanism of FSC improving hypothalamus-pituitary-ovary axis.