红景天苷对负性心理应激下模拟航渡并高强度运动雄性大鼠下丘脑-垂体-性腺轴的调节

目的:通过红景天苷对模拟航渡并高强度运动大鼠的干预,观察干预后大鼠下丘脑-垂体-性腺(HPG)轴的功能及超微病理学的改变。方法:将6周龄的SD雄性大鼠随机分为非应激对照组(NS组,n=10)、训练对照组(TC组,n=12)和红景天苷干预组(ST组,n=12)。NS组不接受任何刺激,在生理盐水灌胃1周后即进行取样。TC组和ST组大鼠经过10d递增负荷跑台训练,分别用生理盐水和红景天苷灌胃1周后,进行模拟航渡及高强度运动,结束即刻取血,使用放免法测定大鼠血清睾酮(T)、皮质酮(CORT)、促肾上腺皮质激素(ACTH)、促黄体生成素(LH)和促性腺激素释放激素(GnRH);HE染色观察睾丸组织病理结构;电镜下观察垂体、睾丸超微结构。结果:①TC组大鼠与NS组相比,血清T水平显著下降;灌服红景天苷后与TC组相比,血清T水平显著增高,与NS组比较差异无统计学意义;②HE染色示3组大鼠的睾丸组织病理无明显变化;③电镜检查示TC组垂体细胞胞浆中分泌颗粒显著减少,而ST组与TC组相比胞浆中分泌颗粒的数目增多明显;TC组睾丸Leydig细胞线粒体肿胀,电子密度增高,嵴减少或消失,ST组睾丸Leydig细胞中见线粒体结构趋向于正常,嵴大多数清晰,可见大小不等深染的分泌颗粒。结论:负性心理应激及高强度的运动训练会抑制HPG轴的功能,灌服红景天苷对HPG轴具有保护作用。

Salidroside Protects the Hypothalamic-Pituitary-Gonad Axis of Male Rats Undergoing Negative Psychological Stress in Experimental Navigation and Intensive Exercise

Objective:To study the effects of salidroside on the function and ultramicro-pathological change of the hypothalamic-pituitary-gonadal (HPG) axis of male rats in experimental navigation and intensive exercise.Methods:Six-week SD rats were randomized into 3 groups:non-stress control (NC,n=10),training control (TC,n=12) and salidroside treatment (ST,n=12) group. Blood samples were collected from the NC rats that did not receive any stimulus after a 7-day intragastric administration of saline. The TC rats unde...