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儿茶素对放射性损伤大鼠肺组织TNF-α表达水平的影响 被引量:1

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摘要 目的阐明儿茶素对大鼠急性放射性肺损伤的保护作用及对TNF-α水平的影响。方法成年雌性Wistar大鼠40只,随机分为4组:①空白对照组:10只,每日腹腔注射生理盐水20 ml/kg;②单纯儿茶素组:10只,每日腹腔注射儿茶素注射液100 mg/kg;③单纯照射组:10只,全肺单次照射15 Gy+每日腹腔注射生理盐水20 ml/kg;④照射+儿茶素组:10只,全肺单次照射15 Gy+每日儿茶素注射液100 mg/kg。于照射后2 w及6 w取各组大鼠各5只的肺组织,作组织学与免疫组化分析。结果照射组大鼠2 w和6 w时肺出现明显炎性损伤,照射+儿茶素组的急性肺炎性改变较照射组明显减轻;空白对照组和单纯儿茶素组动物免疫组化TNF-α阳性细胞数相对较低,单纯照射组的TNF-α阳性细胞数较上述两组明显增高(P<0.05),照射+儿茶素组的阳性细胞数介于两者之间,显著低于单纯照射组(P<0.01)。结论儿茶素对大鼠急性放射性肺损伤具有保护作用,而儿茶素能明显降低该过程中TNF-α表达水平,提示儿茶素可能通过调控该细胞因子发挥辐射防护作用。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2012年第20期4446-4448,共3页 Chinese Journal of Gerontology
基金 2009年广东省科技计划项目(No.93053)
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