Montagner Paula, Krause Ana Rita Tavares, Schwegler Elizabeth, Weschenfelder Marina Menoncin, Rabassa Viviane Rohrig, Schneider Augusto, Pereira Rubens Alves, Brauner Cássio Cassal, Del Pino Francisco Augusto Burkert, Gonçalves Fernanda Medeiros, Corrêa Marcio Nunes
Federal University of Pelotas, Brazil, CEP 96010-900 Pelotas, RS, Brazil; Núcleo de Pesquisa, Ensino e Extensão em Pecuária - Livestock Research, Education and Extension Center (NUPEEC - http://www.ufpel.edu.br/nupeec), CEP 96010-900 Pelotas, RS, Brazil.
Federal University of Pelotas, Brazil, CEP 96010-900 Pelotas, RS, Brazil; Núcleo de Pesquisa, Ensino e Extensão em Pecuária - Livestock Research, Education and Extension Center (NUPEEC - http://www.ufpel.edu.br/nupeec), CEP 96010-900 Pelotas, RS, Brazil.
Res Vet Sci. 2016 Jun;106:84-8. doi: 10.1016/j.rvsc.2016.02.015. Epub 2016 Feb 23.
The aim of this study was to evaluate the concentration of acute phase proteins, milk production, and resumption of postpartum ovarian activity of clinically healthy dairy cows in a semi-extensive system with different Liver Functionality Index (LFI) values. The animals were divided into two groups: Low LFI (LLFI: -7 to -12; n: 10) and High LFI (HLFI: -7 to -4; n: 10). Animals with LLFI had lower paraoxonase activity and lower albumin concentration in the pre- and postpartum periods (P<0.05), higher non-esterified fatty acids prepartum (P<0.005), and higher haptoglobin concentration postpartum (P<0.01). The LLFI group showed lower resumption of ovarian activity until 44days postpartum (29%; P<0.05) than HLFI (86%). Milk production did not differ between groups. Therefore, this study suggests that the LFI is an important biomarker of synthesis of acute phase proteins and the first ovulation interval, and it can be used to improve the production and reproductive performance.
本研究的目的是评估处于半粗放养殖系统中、具有不同肝功能指数（LFI）值的临床健康奶牛的急性期蛋白浓度、产奶量以及产后卵巢活动的恢复情况。动物被分为两组：低LFI组（LLFI：-7至-12；n = 10）和高LFI组（HLFI：-7至-4；n = 10）。LLFI组动物在产前和产后的对氧磷酶活性较低且白蛋白浓度较低（P<0.05），产前非酯化脂肪酸较高（P<0.005），产后触珠蛋白浓度较高（P<0.01）。LLFI组在产后44天前卵巢活动恢复率（29%；P<0.05）低于HLFI组（86%）。两组间产奶量无差异。因此，本研究表明LFI是急性期蛋白合成和首次排卵间隔的重要生物标志物，可用于改善生产和繁殖性能。
