Plant extracts supplied to pre-weaned dairy calves influence their redox status

M. D. Paris, S. Stivanin, G. Heisler, I. D. V. Angelo, Arthur Fernandes Bettencourt, Cristiane Matté, C. Klein, M. B. Zanela, Vivian Fischer
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Abstract

This study aimed to evaluate the effects of the separate provision of green and oregano tea extracts on the biomarkers of the redox state and health condition in pre-weaned Jersey calves from birth to 60 days of life. Two experiments following the complete randomized design with measures repeated in time were carried out using 38 Jersey calves (17 and 21 calves in experiments 1 and 2, respectively). Calves were distributed according to date of birth into one of three groups: control (CON) - with no addition of extracts; oregano extract (OE) - addition of 70 mg of oregano extract/kg of body weight (BW) and green tea extract (GT) - addition of 35 mg of green tea extract/kg of BW. Eight biomarkers of the redox state were evaluated on days 1, 30, and 60 after birth, and variables measured on day 1 were used as covariates. Body temperature and occurrence of diarrhea were evaluated every two days. Regarding the main results, the supply of oregano extract reduced the concentration of oxidizing biomarkers, such as DCFP (oxidation of dichlorofluorescein in plasma) and carbonyl, and increased the activity of antioxidant enzymes, such as GPx and catalase. Green tea extract only reduced DCFP and tended to improve catalase activity. Calves remained healthy (no fever and only a few days with diarrhea), and plant extracts did not improve their health condition. The addition of green tea and oregano extracts into the diet has a positive effect on redox status in pre-weaned Jersey calves.
为断奶前乳牛提供的植物提取物会影响其氧化还原状态
本研究旨在评估分别提供绿茶和牛至茶提取物对断奶前泽西犊牛从出生到 60 天的氧化还原状态生物标志物和健康状况的影响。使用 38 头泽西犊牛(实验 1 和实验 2 中分别有 17 头和 21 头犊牛)按照完全随机设计进行了两次实验,在时间上重复测量。小牛按出生日期分为三组:对照组(CON)--不添加提取物;牛至提取物组(OE)--每公斤体重添加 70 毫克牛至提取物;绿茶提取物组(GT)--每公斤体重添加 35 毫克绿茶提取物。在出生后第 1 天、第 30 天和第 60 天对氧化还原状态的八种生物标志物进行了评估,并将第 1 天测量的变量作为协变量。体温和腹泻情况每两天评估一次。主要结果显示,牛至提取物降低了氧化性生物标志物的浓度,如 DCFP(血浆中二氯荧光素的氧化)和羰基,并提高了抗氧化酶的活性,如 GPx 和过氧化氢酶。绿茶提取物只能减少二氯荧光蛋白的氧化,但有提高过氧化氢酶活性的趋势。犊牛仍然健康(没有发烧,只有几天腹泻),植物提取物并没有改善它们的健康状况。在日粮中添加绿茶和牛至提取物对断奶前泽西犊牛的氧化还原状态有积极影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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