Trudeau V L, Meijer J C, Vandalem J L, Sanford L M
Department of Functional Morphology, University of Utrecht, The Netherlands.
Reprod Nutr Dev. 1991;31(3):233-40. doi: 10.1051/rnd:19910304.
Plasma thyrotropin (TSH) secretion was studied in crossbred (Landrace x Large White) immature and young adult Landrace male pigs. Levels of TSH were low over the first 9 wk post-natally and were maximal at 12 wk of age. Thereafter, hormone levels declined and by 16 wk returned to values similar to those at 7 wk. In addition, a transient increase in TSH was noted at 22 wk. A second experiment involved 2 groups of young adult boars housed either in a socially non-restrictive environment (adjacent to estrual females) or a socially restrictive environment (not in direct physical contact with females). TRH stimulated secretion of TSH and the magnitude of this response was affected by month; minimum and maximum responses were found in May and August respectively. There was an effect of social environment on TRH-induced TSH secretion; during February and August, the magnitude of the TSH response to TRH was lower in socially restricted than in socially non-restricted boars.
对杂种（长白猪×大白猪）未成熟和年轻成年长白公猪的血浆促甲状腺激素（TSH）分泌进行了研究。出生后的前9周，TSH水平较低，在12周龄时达到最高值。此后，激素水平下降，到16周时恢复到与7周时相似的值。此外，在22周时观察到TSH短暂升高。第二项实验涉及两组年轻成年公猪，一组饲养在社会限制较少的环境中（与发情母猪相邻），另一组饲养在社会限制较多的环境中（不与母猪直接身体接触）。促甲状腺激素释放激素（TRH）刺激TSH分泌，这种反应的幅度受月份影响；分别在5月和8月发现最小和最大反应。社会环境对TRH诱导的TSH分泌有影响；在2月和8月期间，社会限制较多的公猪对TRH的TSH反应幅度低于社会限制较少的公猪。
