Colborn D R, Thompson D L, Roth T L, Capehart J S, White K L
Anim. Sci. Dept., Louisiana State University Agricultural Center, Baton Rouge 70803.
J Anim Sci. 1991 Jun;69(6):2556-62. doi: 10.2527/1991.6962556x.
Sexual stimulation induces rapid secretion of cortisol and prolactin (PRL) in stallions. Experiment 1 was designated to determine whether stallions associated location and(or) procedure with previous sexual stimulation in that location. After a control period on d 1, four stallions were exposed to an estrous mare for 5 min on d 2. On d 3, 4, 5, and 6, the same procedure was followed with no mare present. Concentrations of PRL and cortisol increased (P less than .05) after mare exposure on d 2 but did not vary (P greater than .05) on d 1, 3, 4, 5, or 6. In Exp. 2, six stallions were used to determine the short-term effects of 1) sexual stimulation, 2) acute physical exercise, 3) restraint via a twitch (twitching), 4) epinephrine administration, and 5) no stimulation on plasma concentrations of PRL and cortisol. Stallions received one treatment per day separated by 2 d of no treatment. Concentrations of cortisol increased (P less than .05) within 10 min after sexual stimulation, exercise, twitching, and epinephrine administration but not during control bleedings. Concentrations of PRL increased (P less than .05) immediately after sexual stimulation, exercise, and twitching but not after epinephrine administration or during control bleeding. In Exp. 3, the same five treatments were administered to six geldings. Concentrations of cortisol increased (P less than .05) after epinephrine administration, exercise, and twitching but not after sexual stimulation or during control bleedings. Concentrations of PRL increased (P less than .05) after exercise and sexual stimulation.(ABSTRACT TRUNCATED AT 250 WORDS)
性刺激可诱导种马快速分泌皮质醇和催乳素（PRL）。实验1旨在确定种马是否将某个地点及（或）该地点先前的性刺激程序联系起来。在第1天的对照期后，4匹种马于第2天接触发情母马5分钟。在第3、4、5和6天，遵循相同程序，但母马不在场。第2天接触母马后，PRL和皮质醇浓度升高（P<0.05），但在第1、3、4、5或6天无变化（P>0.05）。在实验2中，6匹种马用于确定以下因素对PRL和皮质醇血浆浓度的短期影响：1）性刺激，2）急性体育锻炼，3）通过鼻捻棒进行约束（捻鼻），4）注射肾上腺素，5）无刺激。种马每天接受一种处理，中间间隔2天不处理。性刺激、锻炼、捻鼻和注射肾上腺素后10分钟内，皮质醇浓度升高（P<0.05），但对照采血期间未升高。性刺激、锻炼和捻鼻后，PRL浓度立即升高（P<0.05），但注射肾上腺素后或对照采血期间未升高。在实验3中，对6匹去势公马进行相同的5种处理。注射肾上腺素、锻炼和捻鼻后，皮质醇浓度升高（P<0.05），但性刺激后或对照采血期间未升高。锻炼和性刺激后，PRL浓度升高（P<0.05）。（摘要截断于250字）
