中国寄生虫学与寄生虫病杂志

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旋毛虫排泄分泌蛋白对人肝癌HepG2细胞增殖的抑制作用

刘英杰1,徐静2,黄红莹1,许国强1   

  1. 1 河南大学医学院病原生物学教研室,开封 475003;2 河南大学附属淮河医院,开封 475001
  • 出版日期:2015-08-30 发布日期:2015-09-10

Inhibitory Effect of the Excretory/Scretory Proteins of Trichinella spiralis on Proliferation of Human Hepatocellular Carcinoma HepG2 Cell line

LIU Ying-jie1,XU Jing2,HUANG Hong-ying1,XU Guo-qiang1   

  1. 1 Department of Pathogen Biology,Medical College of Henan University,Kaifeng 475003,China;
    2 Huaihe Hospital Affliated to Henan University,Kaifeng 475001,China
  • Online:2015-08-30 Published:2015-09-10

摘要:

采用MTT法检测旋毛虫肌幼虫排泄分泌蛋白对人肝癌HepG2细胞增殖的抑制作用。AO/EB荧光染色观察与300 μg/ml排泄分泌蛋白共培养24 h的HepG2细胞的细胞核形态。用75 μg/ml排泄分泌蛋白作用HepG2细胞24 h后,流式细胞术(FCM)分析细胞凋亡率,免疫荧光法检测细胞cleaved-caspase 9的表达。结果显示,旋毛虫排泄分泌蛋白呈剂量依赖性抑制人肝癌HepG2细胞的增殖。300 μg/ml排泄分泌蛋白作用24 h后,HepG2细胞核固缩呈圆珠状凋亡特征。75 μg/ml排泄分泌蛋白作用细胞24 h后,细胞早期和晚期凋亡率分别为17.9%和7.3%,细胞坏死占6.6%;HepG2细胞中cleaved-caspase 9荧光强度明显高于阴性对照。

关键词: 旋毛虫, 排泄分泌蛋白, 肝癌HepG2细胞系, 凋亡

Abstract:

Human hepatocellular carcinoma HepG2 Cell line were cultured with different concentrations of excretory/secretory proteins from Trichinella spiralis, and MTT assay was used to evaluate the cell inhibition rate. After co-cultured with 300 μg/ml excretory/secretory proteins for 24 h, the HepG2 cells were observed under a fluorescence microscope with AO and EB staining. When co-cultured with 75 μg/ml excretory/secretory proteins for 24 h, the HepG2 cells were quantified by flow cytometry using Annexin V-FITC/PI stain, and the expression of cleaved-caspase 9 was detected by immunofluorescence assay. The proliferation of HepG2 cells was inhibited significantly by excretory/secretory proteins in a dosage dependant manner. Under fluorescence microscope, some HepG2 cells presented typical apoptotic morphologic changes and the cleaved-caspase 9 protein expression was higher than that of the control. The early and late apoptotic cells and necrotic ones occupied 17.9%, 7.3%, and 6.6%, respectively.

Key words: Trichinella spiralis, Excretory/secretory protein, Hepatocellular carcinoma HepG2 cell line, Apoptosis