中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (20): 3715-3722.doi: 10.3969/j.issn.2095-4344.2013.20.015

• 组织构建与中医药 tissue construction and traditional Chinese medicine • 上一篇    下一篇

丹参酮ⅡA抑制心肌细胞的纤维化

周代星,李智慧,占成业,张莉伟   

  1. 华中科技大学同济医学院附属同济医院急诊科,湖北省武汉市   430030
  • 收稿日期:2012-08-26 修回日期:2012-09-26 出版日期:2013-05-14 发布日期:2013-05-14
  • 通讯作者: 占成业,博士,副教授,副主任医师,华中科技大学同济医学院附属同济医院急诊科,湖北省武汉市 430030 zhzhzh68431@126.com
  • 作者简介:周代星☆,男,1968年生,湖北省汉川市人,汉族,2005年华中科技大学毕业,博士,副教授,副主任医师,主要从事高血压病及心肌纤维化分子生物学的研究。 zdx9599@sina.com
  • 基金资助:

    湖北省自然科学基金资助项目(2009CDB092, 2007ABA272)。

Tanshinone ⅡA inhibits cardiac fibrosis

Zhou Dai-xing, Li Zhi-hui, Zhan Cheng-ye, Zhang Li-wei   

  1. Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan  430030, Hubei Province, China
  • Received:2012-08-26 Revised:2012-09-26 Online:2013-05-14 Published:2013-05-14
  • Contact: Zhan Cheng-ye, M.D., Associate professor, Associate chief physician, Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China zhzhzh68431@126.com
  • About author:Zhou Dai-xing☆, M.D., Associate professor, Associate chief physician, Department of Emergency Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China zdx9599@sina.com
  • Supported by:

    the Natural Science Foundation of Hubei Province, No. 2009CDB092, 2007ABA272

摘要:

背景:转化生长因子β-Smads信号通路是心肌纤维化的关键通路;丹参酮ⅡA具有抑制心肌纤维化作用。
目的:验证丹参酮ⅡA对转化生长因子β1致心肌纤维化的作用并探讨其机制。
方法:取出生24 h内的SD大鼠心脏,利用酶消化法结合差速贴壁体外培养心肌成纤维细胞。取上述第3代心肌成纤维细胞,用5 μg/L转化生长因子β1培养15,30,60,120 min或6,12,24 h后收集细胞,用不同浓度(10-5 mol/L、10-4 mol/L)丹参酮ⅡA预处理2 h后再加入5 μg/L转化生长因子β1培养120 min或24 h后收集细胞,并设空白对照组。免疫细胞化学染色法进行细胞鉴定,反转录聚合酶链反应检测结缔组织生长因子及Ⅰ型胶原蛋白mRNA表达,Western Blot检测Smad7及磷酸化Smad3蛋白表达。免疫组织化学染色及免疫荧光法检测磷酸化Smad3、结缔组织生长因子及Ⅰ型胶原蛋白表达。
结果与结论:转化生长因子β1在一定范围内以时间依赖方式诱导结缔组织生长因子、Ⅰ型胶原、磷酸化Smad3及Smad7的表达,刺激终末结缔组织生长因子、Ⅰ型胶原mRNA的表达量明显上升(均P < 0.01);磷酸化Smad3及Smad7蛋白表达量在刺激后1 h达到峰值,表达量显著增加(均P < 0.01)。高浓度丹参酮ⅡA预处理可显著下调磷酸化Smad3、结缔组织生长因子及Ⅰ型胶原表达(均P < 0.01)。两种浓度的丹参酮ⅡA预处理均可上调Smad7蛋白表达(P < 0.05,P < 0.01)。提示丹参酮ⅡA对心肌纤维化有抑制作用,可能与其上调Smad7蛋白表达,抑制转化生长因子β1诱导的Smad3磷酸化,部分阻断转化生长因子β1-Smads信号通路有关。

关键词: 组织构建, 组织构建与中医药, 丹参酮ⅡA, 心肌成纤维细胞, 心肌纤维化, 转化生长因子β1, Smad3, Smad7, 结缔组织生长因子, Ⅰ型胶原, 信号通路, 细胞培养, 省级基金

Abstract:

BACKGROUND: Transforming growth factor β-Smads is the critical path of cardiac fibrosis, and tanshinone ⅡA can limit cardiac fibrosis.
OBJECTIVE: To explore the effect of tanshinone ⅡA on the cardiac fibrosis induced by transforming growth factor-β1 and the possible mechanisms.
METHODS: Cardiac fibroblasts were isolated from cardiac tissues of neonatal Sprague-Dawley rats by the trypsin digestion and differential adhesion method. Passage 3 cells were treated with 5 μg/L transforming growth factor β1 alone or pretreated with tanshinone ⅡA at different concentrations (10-5 mol/L and 10-4 mol/L). Immunocytochemistry was used for cell identification, reverse transcription-PCR for detection of the mRNA expression of connective tissue growth factor and type Ⅰ collagen, western blotting for detection of the protein expression of Smad7 and phosphorylated Smad3, and immunohistochemistry and immunofluorescence for detection of the protein expression of phosphorylated Smad3, connective tissue growth factor and type Ⅰ collagen.
RESULTS AND CONCLUSION: Transforming growth factor-β1 induced the expression of connective tissue growth factor, type Ⅰ collagen, phosphorylated Smads and Smad7 in a time-dependant manner. The mRNA expression of connective tissue growth factor and type Ⅰ collagen was significantly increased 24 hours after transforming growth factor-β1 stimulation (P < 0.01 for all). The protein expression of phosphorylated Smad3 and Smad7 reached a peak 1 hour after transforming growth factor-β1 stimulation, much higher than the baseline level (P < 0.01 for all). Pretreatment with high concentration of tanshinone ⅡA resulted in a decrease in the expression of phosphorylated Smad3, connective tissue growth factor and type Ⅰ collagen (P< 0.01). The protein expression of Smad7 was substantially upregulated after pretreatment with two concentrations of tanshinone ⅡA as compared with that in the cells at 2 hours post transforming growth factor-β1 stimulation (P < 0.05, P < 0.01). Tanshinone ⅡA may exert an inhibitory effect on cardiac fibrosis by upregulating the expression of Smad7, suppressing the transforming growth factor-β1-induced phosphorylated Smad3 and partially blocking the transforming growth factor-β1-Smads signaling pathway.

Key words: tissue construction, tissue construction and traditional Chinese medicine, tanshinone ⅡA, cardiac fibroblasts, cardiac fibrosis, transforming growth factor beta 1, Smads3, Smads7, connective tissue growth factor, type Ⅰ collagen, signaling pathway, cell culture, provincial grants-supported paper

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