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肿瘤坏死因子对谷氨酰胺促大鼠组织蛋白质合成的影响 被引量:1

The effects of TNF on the glutamine-enhanced protein synthesis in rats' tissues
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摘要 目的:研究肿瘤坏死因子(TNF-α)对谷氨酰胺(Gln)促大鼠组织蛋白质合成的影响。方法:将30只SD大鼠随机分为TPN(对照)组、Gln组和TNF-α组。所有大鼠均行3 d的TPN。对照组仅给予普通TPN液;Gln组在PN液中添加丙氨酰谷氨酰胺二肽,Gln剂量为0.3 g/(kg.d),共72 h;TNF-α组与Gln组相同,并在第3天持续24 h静脉滴注5μg/(kg.d)的TNF-α。所有大鼠均在取材前30 min,一次性静脉注射1.0 mmol/kg的L-15N亮氨酸。实验结束时,分别测定血浆TNF-α、Gln浓度及骨骼肌、小肠、肝组织的Gln浓度和蛋白质合成率。结果:TNF-α组血浆TNF和Gln浓度以及骨骼肌、小肠、肝组织Gln浓度,均显著高于其他两组;Gln组和TNF-α组骨骼肌、小肠、肝组织中蛋白质合成率均高于对照组,Gln组最高。各组间差异均有显著性意义(P<0.01)。结论:Gln能促进组织蛋白质合成,TNF可抑制感染状态下Gln的促蛋白质合成作用。Gln和TNF均能使血浆及组织中Gln浓度升高。 Objective:To determine whether the regulation of glutamine on protein synthesis in tissues could be inhibited by TNF-α(one of the major mediators) in sepsis in a rat model. Methods:Thirty male Sprague-Dawley rats were randomly assigned into three groups:TPN(control),Gln(treated with glutamine),and TNF-α group(treated with glutamine and TNF-α).All rats received isonitrogenous and isocaloric TPN solutions for 3 days.Control group was supplemented by TPN;glutamine group was given glutamine-enriched TPN and TNF...
出处 《肠外与肠内营养》 CAS 2008年第1期7-10,共4页 Parenteral & Enteral Nutrition
基金 国家自然科学基金资助项目(30672060)
关键词 全肠外营养 谷氨酰胺 肿瘤坏死因子 稳定性核素 蛋白质合成率 大鼠 Stable isotopes L-15N Leucine Fractional synthesis rate Mass spectrometry Glutamine TNF-α
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参考文献30

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共引文献21

同被引文献34

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