01. Universidade Federal Rural de Pernambuco - UFRPE (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/1
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Item Perfil metabólico sanguíneo de cordeiros lactentes alimentados com leite bovino complementar(2024-10-01) Silva, Davi Tavares da; Monnerat, João Paulo Ismério dos Santos; http://lattes.cnpq.br/3851426263880079; http://lattes.cnpq.br/2100833254390107The profitability of beef sheep farming is strongly influenced by annual lamb production. Lactating animals with low weight gain are associated with competition between lambs born from multiple births or insufficient milk production, resulting in increased mortality and a decreased weaning rate. Milk supplementation is one of the alternatives to guarantee the growth and development of lactating animals affected by some adverse process in the breast milk produced, such as mastitis. The aim of this study was to evaluate the metabolic profile of protein, energy, liver enzymes and minerals in lambs supplemented with cow's milk. To this end, 16 lactating lambs aged between birth and 30 days were used. They were divided into two groups: one group received complementary bovine milk, with a daily limit of 500 mL, while the other group was exclusively breastfed. Both groups were managed in collective pens and subjected to the same daily management conditions. The lambs were weighed and blood samples were taken to assess the metabolic profile of protein, energy, liver enzymes and minerals. All the results were subjected to analysis of variance to compare the means of each parameter, using a significance level of 5%. The average daily consumption of cow's milk for the artificially supplemented lambs was 324 ± 183 mL. Serum concentrations of total protein, albumin, urea and creatinine showed no difference (P > 0.05) between conventionally breastfed and artificially supplemented lambs. On the other hand, the parameters of cholesterol, LDL, HDL and fructosamine showed a difference (P > 0.05), indicating the influence of supplementation with bovine milk and the absorption of nutrients. This is due to the biochemical composition of milk and the utilization of the energy and protein fractions of the food. Considering that the use of cow's milk as a supplement for neonatal sheep that have suffered some quantitative restriction in the availability of mother's milk or colostrum can compromise the animals' immune supply. The study therefore highlights the need to create strategies to supplement the lambs' diet and ensure good development by adjusting the metabolic balance.Item Relação da expressão da chemerina placentária com biomarcadores de perfil metabólico em vacas no momento do parto(2024-07-11) Dantas, João Victor José de Barros; Souza, Paulo Roberto Eleutério de; http://lattes.cnpq.br/1971832245117283; http://lattes.cnpq.br/7857759665969205The calving period is a critical time for cows, characterized by high energy demands and negative energy balance, which increases susceptibility to metabolic disorders such as hyperketonemia and hypocalcemia, negatively affecting animal health and immunity. This study investigated the relationship between chemerin protein expression and various metabolic biomarkers at calving, considering the hypothesis that chemerin could serve as a substitute or auxiliary marker for existing biomarkers due to its role in metabolic and inflammatory processes. Blood and placental tissue samples were collected from 14 pregnant cows, subjected to clinical examinations and collection of blood and placental tissue. Biochemical and hormonal parameters were analyzed from blood samples, while chemerin gene expression was evaluated from placental tissue samples. The results showed a moderate negative correlation between chemerin expression and serum sodium concentration (r=-0.60; p=0.0241), suggesting a possible regulatory role of chemerin in electrolyte balance during calving. Additionally, significant positive correlations were found between the energy biomarkers BHB and NEFA, and between the protein profile biomarkers total protein and globulin, reflecting the metabolic state during the peripartum period. However, no significant direct correlations were observed between chemerin expression and most of the other metabolic biomarkers studied. It is concluded that chemerin expression in placental tissue may have a regulatory role in electrolyte balance, but its influence on other aspects of the metabolic profile is limited and requires further investigation. Future research should focus on elucidating the mechanisms by which chemerin may influence metabolism and homeostasis during calving.