ABSTRACT
O objetivo deste trabalho foi avaliar os parâmetros bioquímico-clínicos de vacas primíparas e multíparas de alta e média produção de leite criadas em sistema freestall. Foram utilizadas 174 vacas da raça Holandês, divididas em quatro grupos: primíparas de alta produção (PA, n=37; 42,92±0,78 kg leite/dia); primíparas de média produção (PM, n=50; 26,44±0,91 kg leite/dia); multíparas de alta produção (MA, n=37; 44,28±0,87 kg leite/dia) e multíparas de média produção (MM, n=50; 24,87±0,91 kg leite/dia), com 216±12 dias em lactação. Analisaram-se os seguintes metabólitos: concentrações de: colesterol total, colesterol HDL (HDL), triglicerídeos (TAG), beta-hidroxibutirato (BHB), proteínas totais (PT), albumina, ureia, e a atividade da enzima aspartato aminotransferase (AST). O grupo PM apresentou maiores concentrações de albumina (P = 0,001), colesterol (P = 0,001), HDL (P = 0,002) e TAG (P = 0,010) quando comparado com as do grupo MM. O grupo PA apresentou maiores concentrações de HDL (P = 0,001) quando comparado com a MA. PA apresentou maiores concentrações de HDL (P = 0,023) e AST (P = 0,05) ao se comparar com PM. MA apresentou maiores concentrações de albumina (P = 0,009), colesterol (P = 0,041), HDL (P = 0,053) e TAG (P = 0,052) quando comparado com a MM. As diferenças encontradas nos metabólitos analisados tornam-se importantes no estabelecimento dos valores de referência para uma população regional de categorias semelhantes, além da possibilidade de utilização de parâmetros bioquímico-clínicos na prevenção e monitoramento de transtornos metabólicos.
The aim of this study was to evaluate the clinical and biochemical parameters of primiparous and multiparous cows of high and medium milk yield reared in a freestall system. One hundred seventy-four Holstein cows were used, divided into four groups: high yield primiparous (PA, n = 37; 42.92 ± 0.78 kg milk / day); medium yield primiparous (PM, n = 50; 26.44 ± 0.91 kg milk / day); high yield multiparous (MA, n = 37; 44.28 ± 0.87 kg milk / day) and medium yield multiparous (MM, n = 50; 24.87 ± 0.91 kg milk / day) with 216 ± 12 days in lactation. Blood analysis included: total cholesterol, HDL cholesterol (HDL), triglycerides (TAG), betahydroxybutyrate (BHB), total protein (PT), albumin, urea, and aspartate aminotransferase (AST). The PM group had higher albumin concentrations (P = 0.001), cholesterol (P = 0.001), HDL (P = 0.002) and TAG (P = 0.010) compared to the MM group. PA group had higher HDL concentrations (P = 0.001) than MA. PA had higher HDL (P = 0.023) and AST concentrations (P = 0.05) compared to PM. MA had higher albumin (P = 0.009), cholesterol (P = 0.041), HDL (P = 0.053) and TAG (P = 0.052) concentrations compared to MM. The results found in the analyzed metabolites are important in establishing reference values for a regional population, and also allow the use of these biochemical parameters in the prevention and monitoring of metabolic disorders.
Subject(s)
Animals , Triglycerides , Energy Metabolism , Disease Prevention , Breast-Milk Substitutes , Cholesterol, HDLABSTRACT
Our study evaluated how the consumption of diets with low (LOW group - 0.4/1) or high (CON group - 13.6/1) omega-6/omega-3 ratio across generations (F1 and F2) can modulate liver fatty acid (FA) profile and blood biomarkers. Liver content of α-linolenic acid was higher in animals always fed with LOW diet than animals that changed from CON to LOW diet, which by your time was higher than animals always fed with CON diet. Liver saturated FA concentration decreased in both groups from F1 to F2. In conclusion, both diets were efficient in decreasing the saturated FA liver content across generations, the LOW ratio diet was more effective in reducing blood triglycerides and non-esterified fatty acids, and there was a multigenerational effect of the LOW ratio diet, improving the FA profile even when the offspring start receiving the CON diet.