泌乳影响多胎母猪断奶后的新陈代谢状况,但不影响卵泡大小

IF 4 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE Animal Pub Date : 2024-09-19 DOI:10.1016/j.animal.2024.101339
Q. Yu , K.J. Teerds , J. Keijer , N.M. Soede
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引用次数: 0

摘要

青年母猪在泌乳期间会调动体内储备来支持产奶,从而导致能量负平衡(NEB)。这种负能量平衡会影响卵泡和卵母细胞的发育,从而影响下一胎的出生。负能量平衡导致的 IGF1 水平下降被认为在这一过程中起到了一定作用。由于几乎没有对多胎母猪进行过这方面的研究,因此本研究重点关注多胎母猪在断奶后第 0 天和第 4 天的泌乳体重损失(%)、代谢激素和卵泡发育之间的关系。共有 31 头母猪(奇数为 4.7 ± 2.5)在断奶后第 0 天或第 4 天死亡。哺乳期平均体重损失为 3.3 ± 4.5%,平均背膘损失为 4.1 ± 0.3 mm。代谢图谱证实了哺乳期对代谢的影响,因为非酯化脂肪酸(NEFA)和肌酐水平在第0天均高于第4天。相反,血清中 IGF1 和生长分化因子 15 的水平在第 0 天比第 4 天低。体重损失(%)较高与第 0 天较高的 NEFA 水平有关,但与第 4 天无关。血清和卵泡液中的 IGF1 浓度在第 0 天和第 4 天相似,并且与这两天的卵泡大小无关。总之,尽管泌乳影响了这些多胎母猪断奶后的代谢状况,但卵泡大小与这些状况无关,这可能是由于这些母猪的体重损失相对较轻。IGF1浓度受泌乳的影响较小,而且似乎不会像体重损失严重的母猪那样限制卵泡的发育。
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Lactation affects postweaning metabolic profiles, but not follicle size in multiparous sows
Young sows mobilise body reserves to support milk production during lactation, resulting in a negative energy balance (NEB). This NEB affects the development of follicles and oocytes that give rise to the next litter. Decreased IGF1 levels due to a NEB are thought to play a role in this process. As this has hardly been studied in multiparous sows, the current study focused on relations between lactation BW loss (%), metabolic hormones, and follicle development in multiparous sows at Day 0 and Day 4 after weaning. A total of 31 sows of parity 4.7 ± 2.5 were killed at either Day 0 or Day 4 after weaning. Average BW loss during lactation was 3.3 ± 4.5%, while average backfat loss was 4.1 ± 0.3 mm. The metabolic profile confirmed the metabolic impact of lactation as both non-esterified fatty acid (NEFA), and creatinine levels were higher at Day 0 than that at Day 4. Conversely, serum levels of IGF1 and growth differentiation factor 15 levels were lower on Day 0 than on Day 4. A higher BW loss (%) was related to higher NEFA levels on Day 0, but not on Day 4. IGF1 concentrations in serum and follicle fluid were similar at Day 0 and Day 4 and were not related to follicle size on these days. In conclusion, although lactation affected postweaning metabolic profiles in these multiparous sows, follicle size was not related to these profiles, probably due to the relatively mild BW loss of these sows. IGF1 concentrations were less affected by lactation and did not seem to limit follicle development, as it does in sows experiencing high weight loss.
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来源期刊
Animal
Animal 农林科学-奶制品与动物科学
CiteScore
7.50
自引率
2.80%
发文量
246
审稿时长
3 months
期刊介绍: Editorial board animal attracts the best research in animal biology and animal systems from across the spectrum of the agricultural, biomedical, and environmental sciences. It is the central element in an exciting collaboration between the British Society of Animal Science (BSAS), Institut National de la Recherche Agronomique (INRA) and the European Federation of Animal Science (EAAP) and represents a merging of three scientific journals: Animal Science; Animal Research; Reproduction, Nutrition, Development. animal publishes original cutting-edge research, ''hot'' topics and horizon-scanning reviews on animal-related aspects of the life sciences at the molecular, cellular, organ, whole animal and production system levels. The main subject areas include: breeding and genetics; nutrition; physiology and functional biology of systems; behaviour, health and welfare; farming systems, environmental impact and climate change; product quality, human health and well-being. Animal models and papers dealing with the integration of research between these topics and their impact on the environment and people are particularly welcome.
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