Biochemical profile of Mangalarga Marchador mares during the last third of pregnancy, foaling and lactation/Perfil bioquimico de eguas da raca Mangalarga Marchador durante o terco final da gestacao, parto e lactacao

• Published in: Ciência rural Vol. 49; no. 11
• Main Authors: da Silva, Micheline Ozana, Filho, Jose Dantas Ribeiro, de Melo Ferreira Dantas, Waleska, Ribeiro, Bruna Maria, Ermita, Pedro Ancelmo Nunes, Monteiro, Lorena Chaves, Costa, Caio Monteiro, Samue, Glaucia Matos Marques da Silva, Alves, Rodrigues, Avanza, Marcel Ferreira Bastos, de Morais Santos, Paulo Vinicius, Filho, Helio Cordeiro Manso
• Format: Journal Article
• Language: Spanish
• Published: Universidade Federal de Santa Maria 01-11-2019
• Subjects: Analysis; Biochemistry; Homeostasis; Physiological aspects; Pregnancy; Purines; Urea; Uric acid
• ISSN: 0103-8478
• DOI: 10.1590/0103-8478cr20190200

Adaptive changes in metabolism may occur under specific physiological conditions, being necessary the knowledge of the biochemical constituents that can undergo variations during the sixty days before foaling, until the first sixty days of lactation. The present study aimed to identify and evaluate the biochemical profile of Mangalarga Marchador mares during the last third of pregnancy, foaling and lactation. For this, 48 mares were used, which formed a maintenance group (MG), composed of non-pregnant mares and an experimental group, called the transition group (TG), formed by pregnant mares. Blood samples were collected at the following times: MG was evaluated in a single time (beginning of all collections); TG was evaluated in seven times [T-60, T-30, T-15 (days before foaling), T0 (first six hours after foaling), T15, T30, T60 (days after foaling)]. All animals were submitted to biochemical analysis, in which the concentrations of total calcium, chloride, phosphorus, magnesium, sodium, potassium, uric acid, creatinine, and urea were measured. The two groups differed significantly (P<0.05) in calcium, magnesium, sodium, potassium, creatinine, uric acid and urea concentration. Variation between times was also observed for these compounds. However, chloride and phosphorus did not differ between MG and TG. It was concluded that the last third of pregnancy, foaling and lactation exerts major influence on the biochemical constituents of blood through adjustments to maintain homeostasis in mares. Key words: delivery, equine, metabolic parameters, peripartum. Mudancas adaptativas no metabolismo podem ocorrer em condicoes fisiologicas especificas, sendo necessario o conhecimento dos constituintes bioquimicos que possam sofrer variacoes durante os sessenta dias antes do parto, ate os primeiros sessenta dias de lactacao. O presente estudo teve como objetivo identificar e avaliar o perfil bioquimico de eguas Mangalarga Marchador no terco final da gestacao, parto e lactacao. Para isso, foram utilizadas 48 eguas, que formaram um grupo em manutencao (GM), composto por eguas nao prenhes e um grupo experimental, chamado de grupo de transicao (GT), formado por eguas gestantes. As coletas de sangue foram realizadas nos seguintes tempos: GM foi avaliada em um unico tempo (inicio de todas as coletas); GT foi avaliado em sete tempos [T-60, T-30, T-15 (dias antes do parto), T0 (primeiras seis horas apos o parto), T15, T30, T60 (dias apos o parto)]. Todos animais foram submetidos as analises bioquimicas, em que foram mensuradas as concentracoes de calcio total, sodio, potassio, cloreto, fosforo, magnesio, acido urico, creatinina e ureia. Os dois grupos diferiram significativamente (P<0,05) nas concentracoes de calcio total, magnesio, sodio, potassio, creatinina, acido urico e ureia. Variacoes entre tempos tambem foram observadas nesses componentes. Entretanto, cloreto e fosforo nao diferiram entre GM e GT. Conclui-se que o terco final da gestacao, parto e lactacao exerce forte influencia sobre os constituintes bioquimicos do sangue por meio de ajustes para manter a homeostase nas eguas. Palavras-chave: equinos, parametros metabolicos, parto, periparto.