大豆卵磷脂对子宫内发育迟缓仔猪肠道抗氧化和热休克蛋白70表达的影响

doi:10.3864/j.issn.0578-1752.2012.13.015

摘要/Abstract

摘要： 【目的】研究大豆卵磷脂（soya lecithine，SL）对子宫内发育迟缓（intrauterine growth retardation，IUGR）猪肠道生长、黏膜氧化应激（oxidative stress，OS）和热休克蛋白70（heat shock protein，HSP70）表达的影响。【方法】试验共选用12头7 d IUGR仔猪和6头正常体重（NBW）仔猪，所有IUGR仔猪随机分成两组（n=6），分别饲喂基础人工乳（IUGR组）和添加1.5%SL的人工乳（IUGR+SL组），所有NBW仔猪饲喂基础人工乳（NBW组，n=6），试验期7 d。【结果】IUGR显著降低14 d仔猪空肠及其非黏膜绝对重量（P＜0.05），降低空肠黏膜总抗氧化能力（T-AOC）、谷胱甘肽还原酶（GR）和谷胱甘肽过氧化物酶（GPx）活性（P＜0.05），升高MDA水平（P＜0.05），黏膜HSP70的 ELISA和免疫印迹法检测结果均显著升高（P＜0.05）。IUGR猪补充SL后，空肠肠段、黏膜和非黏膜绝对和相对重量均显著升高（P＜0.05）；空肠黏膜T-AOC、GPx和SOD显著升高（P＜0.05），而MDA显著下降（P＜0.05）；ELISA检测结果显示HSP70蛋白水平显著降低（P＜0.05），且与SL添加水平呈显著负相关（P＜0.05）。【结论】补充SL对恢复IUGR导致的仔猪肠道组织生长缓慢、HSP70表达升高和OS损伤有很好的效果。

关键词: 大豆卵磷脂, 猪, 子宫内发育迟缓, 抗氧化, 热休克蛋白70

Abstract: 【Objective】The effects of supplement of soya lecithine (SL) on intestinal growth, mucosal heat shock protein 70 (HSP70) expression and oxidation stress (OS) in intrauterine growth retardation (IUGR) piglets were studied.【Method】Twelve IUGR piglets and six piglets with normal birth weight were selected. All piglets were weaned on 7th d of age, and assigned equally to three groups: six NBW and six IUGR piglets were fed with control diet (IUGR), and six IUGR piglets were fed with diet supplemented with 1.5% SL (IUGR+SL) for 7 days.【Result】IUGR decreased (P＜0.05) the absolute weigh of jejunal segment and non-mucosa, reduced (P＜0.05) the mucosal capacity of total anti-oxidation (T-AOC), as well as the activity of GR and GPx, and elevated (P＜0.05) the content of MDA. The mucosal HSP70 contents detected by ELISA and Western Blot were increased (P＜0.05) by IUGR. After SL treatment, the absolute and relative weight of jejunum, jejunal mucosa and non-mucosa increased (P＜0.05) in IUGR piglets. Supplement of SL increased (P＜0.05) the mucosal T-AOC, GPx and SOD, as well as reduced (P＜0.05) MDA and HSP70 content in terms of ELISA. Inverse correlations were found between SL supplementation in IUGR piglets and HSP70 contents (P＜0.05).【Conclusion】SL plays an important role in recovering impaired jejunal growth, increased mucosal HSP70, and OS induced by IUGR.

Key words: soya lecithine, piglets, IUGR, anti-oxidation, HSP70

王远孝, 张莉莉, 周根来, 王恬. 大豆卵磷脂对子宫内发育迟缓仔猪肠道抗氧化和热休克蛋白70表达的影响[J]. 中国农业科学, 2012, 45(13): 2711-2717.

WANG Yuan-Xiao, ZHANG Li-Li, ZHOU Gen-Lai, WANG Tian. Effect of Supplement of Soya Lecithine on Mucosal Anti-Oxidation and Heat Shock Protein 70 Content in Intrauterine Growth Retardation Piglets[J]. Scientia Agricultura Sinica, 2012, 45(13): 2711-2717.

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