【摘要】 本实验监测8头围产期奶牛外周血浆中胶原蛋白和肌浆球蛋白的代谢产物——羟基脯氨酸(HP)和3甲基组氨酸(3MH)的含量,借以找出这两种蛋白质的代谢规律和子宫复旧的关系。结果表明:荷兰黑白花牛和娟珊牛血浆中HP的含量和子宫角直径分别呈显著及极显著正相关(r=0.41,P<0.05和r=0.57 P<0.01),而3MH分别呈极显著和显著正相关(r=0.52 P<0.01和r=0.39(P<0.05)。此外,黑白花牛血浆中3MH的含量极显著高于娟珊牛(P<0.001)。两个品种牛子宫复旧的平均时间,黑白花牛为37.4±3.1天,娟珊牛32.3±2.1天。结果说明牛产后子宫体积的缩小与子宫肌肉的胶原蛋白和肌浆球蛋白降解成氨基酸排出体外有关,子宫复旧的速度可能决定于这两种蛋白质的降解速度。更多还原

【Abstract】 Eight periparturient cows, four Friesians and four Jerseys, were us-ed in the experiment to determine the concentration of hydroxyprolino (HP)and 3 methyl histidine ( 3 MH)in the peripheral circulation, which is degradated from co-llagen and myosin, respectively. The objective of the study was to find out the rcla tionship between these protein degrabation and uterine involution.The results showed that: the mean plasma coneentration of HP and 3MH was signjficacantly correlated to the diameter of uterine horn in both breeds of the experimental cows, respectively (r=0.41, p<0.05; r=0.57,P<0.01: r=0.52, P<0.01; r=0.39; P<0.05); plasma concention of 3MH was significantly high in Friesian cows as compared with that in Jersey cows (p<0.001); the mean time for Completion of uterine, involution was 37.4±3.1 days for Friesian cows and 32.3±2.1 days for Jerseyes cows The rults revealed that the reduction of uterus in size postpartum is related to the dagradation of olisgen and mgosin. The rate of uterine involution might dependent upon the speed of fhese protein degradation.更多还原