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促肝细胞生长素对急性肝功能衰竭大鼠肝组织Ki-67表达的影响
http://www.100md.com 2005年3月15日 《世界华人消化杂志》 2005年第6期
     王晓东, 朱碧红,潘陈为, 陈永平,温州医学院附属第一医院感染科 浙江省温州市 325027

    通讯作者:陈永平,325027, 浙江省温州市府学巷2号,温州医学院附属第一医院. beerfoam@sina.com

    电话:0577-88078232

    收稿日期:2005-01-10 接受日期:2005-02-02

    摘要

    目的:观察促肝细胞生长素(hepatocytegrowth-promoting factors,pHGF)对急性肝功能衰竭大鼠肝组织Ki-67表达的影响,探讨肝细胞再生的规律.
, 百拇医药
    方法:SD大鼠随机分为正常对照组、D-氨基半乳糖(D-Galactosamine,D-GalN)组和D-GalN+pHGF组,以D-GalN1.2 g/kg腹腔注射制备大鼠急性肝功能衰竭模型,2h后D-GalN+pHGF组大鼠每24h腹腔注射pHGF2 mg/kg,并分别于第1、3、5、7、9、11、13、15d处死各组大鼠6只.如果该时间点前每组有濒死大鼠则提前处死,使每组各时间点处死大鼠总数为6只.采用S-P免疫组织化学法检测肝组织中Ki-67的表达.

    结果:D-GalN组大鼠肝组织Ki-67标记指数(Ki-67labeling index,Ki-67-LI)在模型建立成功后第5d达峰值,以后急剧下降,在第15d时达到正常对照组水平,但D-GalN+pHGF组大鼠Ki-67-LI峰值于第3d出现,比D-GalN组早,持续时间长,且各时间点的Ki-67-LI均明显高于D-GalN组,在第15d时仍未降至正常对照组水平,与之相比,明显升高(P<0.01).D-GalN组及D-GalN+pHGF组肝细胞数量逐渐增多,但除第1d外,D-GalN+pHGF组各时间点肝细胞数量明显高于D-GalN组(P<0.01).
, 百拇医药
    结论:急性肝功能衰竭时,残存的肝细胞仍有再生能力,但其再生过程受到抑制.pHGF可以提高急性肝功能衰竭大鼠肝组织Ki-67的表达,从而促进肝细胞的再生,但其再生程度同样受到一定程度的抑制.

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    编辑 张海宁, 百拇医药( 王晓东, 朱碧红, 潘陈为, 陈永平)
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