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23. Reproduction performance and blood biochemical parameters in dairy cows: Relationship with oxidative stress status

机译：23.奶牛的繁殖性能和血液生化参数：与氧化应激状态的关系

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Background and Aim: During the last decades, reproduction performances declined dramatically worldwide, but little is known concerning the involvement of oxidative stress as a causative factor. Oxidative stress may act at different levels, with negative impacts on cell membrane integrity and other active molecules with potential subsequent effects on reproduction. The aim of the current study was to investigate the oxidative stress status in cows according to their reproductive performances. Materials and Methods: Peripheral blood concentration of two oxidative stress biomarkers, glutathione S-transferase (GST) and malondialdehyde (MDA), and other biochemical parameters (glucose, total lipids, cholesterol, triglycerides, albumin, total proteins, calcium, urea, creatinine, direct bilirubin, alanine aminotransferase, aspartate aminotransferase, and alkaline phosphatase) were determined in 40 healthy cows. Body condition score (BCS), calving to first service interval (FSI), calving to conception interval (CCI), and the number of service per conception (SPC) were simultaneously recorded for each cow. Results: Concerning FSI, three groups were established: Group 1 (from 44 to 60 days), Group 2 (from 60 to 70 days), and Group 3 (from 70 to 80 days). For CCI, two groups were considered: Group 1 (110 days). MDA showed significant high values only in cows with the lowest BCS (1.5) compared to cows with BCS note of 2.5 and 3.5. No significant difference was observed in cows oxidative stress status (MDA and GST) according to reproductive performances (FSI, CCI, and SPC) in all studied groups. Conclusion: The results revealed relatively altered oxidative stress status in cows with abnormal reproductive performances; however, no significant difference was recorded whatever the considered reproductive parameter.
机译：背景与目的：在过去的几十年中，全世界的繁殖性能急剧下降，但对于氧化应激作为病因的了解很少。氧化应激可能以不同的水平起作用，对细胞膜完整性和其他活性分子产生负面影响，并对繁殖产生潜在的后续影响。本研究的目的是根据母牛的繁殖性能调查其氧化应激状态。材料和方法：外周血中两种氧化应激生物标志物谷胱甘肽S-转移酶（GST）和丙二醛（MDA）的浓度，以及其他生化参数（葡萄糖，总脂质，胆固醇，甘油三酸酯，白蛋白，总蛋白质，钙，尿素，肌酐，直接胆红素，丙氨酸氨基转移酶，天冬氨酸氨基转移酶和碱性磷酸酶）在40头健康母牛中进行了测定。同时记录每头母牛的身体状况评分（BCS），产犊至首次服务间隔（FSI），产犊至受胎间隔（CCI）和每胎受胎次数（SPC）。结果：关于FSI，分为三组：第一组（44至60天），第二组（60至70天）和第三组（70至80天）。对于CCI，考虑了两个组：第1组（110天）。与BCS值分别为2.5和3.5的母牛相比，MDA仅在具有最低BCS（1.5）的母牛中显示出明显的高值。在所有研究组中，根据生殖性能（FSI，CCI和SPC），在牛的氧化应激状态（MDA和GST）上均未观察到显着差异。结论：结果表明，具有异常生殖性能的奶牛的氧化应激状态相对改变。但是，无论考虑什么生殖参数，都没有记录到显着差异。

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