中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (11): 1987-1992.doi: 10.3969/j.issn.2095-4344.2013.11.013

• 组织构建与生物活性因子 tissue construction and bioactive factors • 上一篇    下一篇

干扰素α-2a与肝纤维化大鼠肝星状细胞的凋亡

刘翠芸,张 伟,刘佩佩,叶长根,易 珍,孙水林   

  1. 南昌大学第二附属医院感染科,江西省南昌市 330006
  • 收稿日期:2012-06-13 修回日期:2012-07-12 出版日期:2013-03-12 发布日期:2013-03-12
  • 通讯作者: 孙水林,教授,主任医师,南昌大学第二附属医院感染科,江西省南昌市 330006 sunshuilin2280@126.com
  • 作者简介:刘翠芸★,女,1987年生,江西省南昌市人,汉族,南昌大学医学院在读硕士,主要从事肝病等传染病研究

Interferon alpha-2a and apoptosis of hepatic stellate cells in rats with hepatic fibrosis

Liu Cui-yun, Zhang Wei, Liu Pei-pei, Ye Chang-gen, Yi Zhen, Sun Shui-lin   

  1. Department of Infectious Diseases, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
  • Received:2012-06-13 Revised:2012-07-12 Online:2013-03-12 Published:2013-03-12
  • Contact: Sun Shui-lin, Professor, Chief physician, Department of Infectious Diseases, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China sunshuilin2280@126.com
  • About author:Liu Cui-yun★, Studying for master’s degree, Department of Infectious Diseases, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China

摘要:

背景:干扰素α-2a改善肝纤维化的机制直到目前仍尚未阐明。
目的:进一步验证干扰素α-2a对 CCl4诱导大鼠肝纤维化模型中肝星状细胞凋亡的影响。
方法:建立CCl4诱导肝纤维化模型,健康SD雌性大鼠50只,采用随机对照原则将SD大鼠分成5组,即生理盐水对照组、纤维化模型组、6×104 U/kg 干扰素α-2a干预组、12×104 U/kg干扰素α-2a干预组及6×104 U/kg干扰素α-2a对照组。造模8周时取肝组织标本,分别进行肝纤维化指标检测;RT-PCR分析肝组织bcl-2、bax的表达;免疫组织化学染色用a平滑肌肌动蛋白对活化的肝星状细胞进行标记。
结果与结论:肝组织病理形态显示CCl4诱导肝纤维化成功建立,表现为纤维化模型组汇管区周围纤维化明显,有芒状纤维和纤维间隔形成,各干扰素α-2a干预组肝纤维化有不同程度缓解。纤维化模型组有大量a平滑肌肌动蛋白阳性表达,6×104 U/kg干扰素α-2a干预组a平滑肌肌动蛋白阳性表达较纤维化模型组减少,12×104 U/kg干扰素α-2a干预组更少,6×104 U/kg干扰素α-2a对照组未见a平滑肌肌动蛋白阳性表达。结果提示干扰素α-2a能下调CCl4诱导肝纤维化bcl-2的表达,及上调bax的表达。提示干扰素α-2a阻断CCl4诱导肝纤维化机制存在通过调节bcl-2、bax的表达,诱导肝星状细胞凋亡途径,该调节作用可能与干扰素α-2a剂量相关。

关键词: 组织构建, 组织构建与生物活性因子, 肝纤维化, 肝, 干扰素α-2a, Bcl-2, Bax, 肝星状细胞, 细胞凋亡, 省级基金, 组织构建图片文章

Abstract:

BACKGROUND: Up to now, the mechanism underlying interferon alpha 2a to improve hepatic fibrosis has not been clarified.
OBJECTIVE: To investigate the effect of interferon alpha 2a on hepatic stellate cells apoptosis in the CCl4-induced hepatic fibrosis rat model.
METHODS: We established the CCl4-induced hepatic fibrosis models in rats. Fifty healthy female Sprague-Dawley rats were equally and randomly divided into five groups, certainly each group included 10. Five groups were saline control group, hepatic fibrosis model group (model group), 6×104 U/kg interferon alpha 2a intervention group, 12×104 U/kg interferon alpha 2a intervention group and 6×104 U/kg interferon alpha 2a control group. At 8 weeks after modeling, blood and liver tissues were collected to detect the indicators of hepatic fibrosis; the expression of bcl-2 and bax in the liver tissue was analyzed with semi-quantitative reverse transcription-PCR; and immunohistochemical staining was used to mark a-smooth muscle actin in activated hepatic stellate cells.
RESULTS AND CONCLUSION: Pathological morphology of the liver tissue demonstrated that the hepatic fibrosis model was successfully established. The model group had fibrosis significantly around the portal area; in addition, Mans-like fibers and fibrous septa formed. Different interferon alpha 2a intervention groups had fibrosis relief to different extent. a-smooth muscle actin had a great amount of positive expression in the model group, while the positive expression of a-smooth muscle actin was lower in the interferon alpha 2a intervention groups, especially in the 12×104 U/kg interferon alpha 2a intervention group as compared the model group. In addition, there was no expression of a-smooth muscle actin in the 6×104 U/kg interferon alpha 2a control group. Interferon alpha 2a could down-regulate bcl-2 expression and up-regulate bax expression in CCl4-induced hepatic fibrosis models. These findings indicate that the mechanism of interferon alpha 2a blocking CCl4-induced hepatic fibrosis is mainly present by regulating the expression of bcl-2 and bax to induce apoptosis of hepatic stellate cells, and this regulatory role is possibly related to interferon alpha 2a dose.

Key words: tissue construction, tissue construction and bioactive factor, hepatic fibrosis, liver, interferon alpha-2a, Bcl-2, Bax, hepatic stellate cells, cell apoptosis, provincial grants-supported paper, tissue construction photographs-containing paper

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