Porter D G, Friendship R M, Ryan P L, Wasnidge C
Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph.
Can J Vet Res. 1992 Jul;56(3):204-7.
Porcine relaxin (pRXN) titers were measured in 109 plasma samples drawn between 24 and 120 h post-partum from good (n = 34), and poor (n = 25) milking sows and from sows (n = 12) exhibiting overt signs of hypogalactia located on six swine farms in Ontario. Mean plasma pRXN titers among the three groups at 24 h post-partum were not significantly different although there was considerable variation. By 48 h however, the pRXN titers had declined markedly in all groups and between 72 and 120 h, pRXN was cleared from the plasma of all sows examined except one hypogalactic animal that had a titer of 1.13 ng/mL at 96 h. These results suggest that, although pRXN may be identifiable in the corpora lutea during the puerperium, it does not contribute to either hypogalactia or poor lactational performance in sows. The data also encourage the view that pRXN could be used at farrowing without deleterious effects on suckling.
在安大略省六个养猪场，从产后24至120小时采集的109份血浆样本中检测了猪松弛素（pRXN）滴度，这些样本来自泌乳良好的母猪（n = 34）、泌乳差的母猪（n = 25）以及表现出明显少乳迹象的母猪（n = 12）。产后24小时时，三组母猪的血浆pRXN平均滴度虽有相当大的差异，但无显著不同。然而，到48小时时，所有组的pRXN滴度均显著下降，在72至120小时期间，除一头少乳母猪在96小时时滴度为1.13 ng/mL外，所有检测母猪的血浆中pRXN均已清除。这些结果表明，尽管在产褥期黄体中可能可识别出pRXN，但它对母猪的少乳或泌乳性能不佳并无影响。这些数据还支持这样一种观点，即分娩时使用pRXN对哺乳无有害影响。
