中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (32): 5092-5096.doi: 10.3969/j.issn.2095-4344.2015.32.002

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

肾上腺髓质素对缺氧培养骨髓间充质干细胞表达凋亡相关蛋白的影响

姚月娴1,王隽苼2,苏津自2,江金峰2,蔡文钦2   

  1. 1福建省立医院北院,福建省老年医院心内科,福建省福州市 350003;
    2福建医科大学附属第一医院心内科,高血压研究所,福建省福州市 350005
  • 出版日期:2015-08-06 发布日期:2015-08-06
  • 通讯作者: 蔡文钦,硕士,主治医师,福建医科大学附属第一医院心内科,高血压研究所,福建省福州市 350005
  • 作者简介:姚月娴,女,1983年生,福建省泉州市人,汉族,2010年福建医科大学毕业,硕士,主治医师,主要从事组织工程干细胞及老年心血管疾病研究。
  • 基金资助:

    the Youth Fund of Fujian Provincial Department of Health, No. 2011-1-15, 2011-1-32; the Natural Science Foundation of Fujian Province, No. 2014J01433

Adrenomedullin effect on expression of apoptosis-related protein in bone marrow mesenchymal stem cells under hypoxia

Yao Yue-xian, Wang Jun-sheng, Su Jin-zi, Jiang Jin-feng, Cai Wen-qin   

  1. 1North Branch, Fujian Provincial Hospital, Fuzhou 350003, Fujian Province, China; 
    2Department of Cardiology, Fujian Institute of Hypertension Research, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, Fujian Province, China
  • Online:2015-08-06 Published:2015-08-06
  • Contact: Cai Wen-qin, Master, Attending physician, Department of Cardiology, Fujian Institute of Hypertension Research, First Affiliated Hospital, Fujian Medical University, Fuzhou 350005, Fujian Province, China
  • About author:Yao Yue-xian, Master, Attending physician, North Branch, Fujian Provincial Hospital, Fuzhou 350003, Fujian Province, China
  • Supported by:

    the Youth Fund of Fujian Provincial Department of Health, No. 2011-1-15, 2011-1-32; the Natural Science Foundation of Fujian Province, No. 2014J01433

摘要:

背景:肾上腺髓质素基因转染能增强骨髓间充质干细胞在缺血、缺氧环境下的抗凋亡能力,但其机制尚未完全明确。
目的:观察肾上腺髓质素对骨髓间充质干细胞缺血、缺氧时Bax、Bcl-2和Caspase-3等凋亡相关调节蛋白表达的影响。
方法:贴壁法分离、培养、纯化SD大鼠骨髓间充质干细胞,缺氧、无血清培养0,3,6,9,12 h后用Western blot测定Bax、Bcl-2、Caspase-3蛋白的表达以确定最佳缺氧时间。采用缺氧6 h为时间点,根据缺氧、无血清培养前是否进行肾上腺髓质素预处理分为对照组(未加入肾上腺髓质素)及肾上腺髓质素不同质量浓度组(1,10,100 μg/L),然后采用Western blot测定Bax、Bcl-2、Caspase-3蛋白的表达。
结果与结论:①无血清培养条件下缺氧0,3,6,9,12 h后骨髓间充质干细胞 Bax、Bcl-2表达均增加(P < 0.05),缺氧6 h时Bax/Bcl-2比值、caspase-3蛋白达到最小(P < 0.05)。②缺氧6 h时,与1,10 μg/L肾上腺髓质素组相比,100 μg/L肾上腺髓质素组表达Bax蛋白、Caspase-3蛋白最低,Bax/Bcl-2比值最低,而表达Bcl-2蛋白最高(P < 0.05)。结果表明肾上腺髓质素能降低无血清、缺氧条件下骨髓间充质干细胞Bax/Bcl-2比值、Caspase-3蛋白表达,该效应存在剂量依赖性。

 中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 干细胞, 骨髓干细胞, 肾上腺髓质素, 骨髓间充质干细胞, 凋亡蛋白, 缺氧培养, 福建省自然科学基金

Abstract:

BACKGROUND: Adrenomedullin gene transfection can strength the anti-apoptotic ability of bone marrow mesenchymal stem cells under ischemia and hypoxia, but its mechanism is not yet clear.
OBJECTIVE: To investigate the effect of adrenomedullin on the expression of apoptosis-related proteins, Bax, Bcl-2 and Caspase-3, in bone marrow mesenchymal stem cells under hypoxia and ischemia.
METHODS: Bone marrow mesenchymal stem cells of Sprague-Dawley rats were isolated, cultured and purified, and then cultured in serum-free medium under hypoxic condition for 0, 3, 6, 9, 12 hours. Then, western blot assay was employed to detect the expression of Bax, Bcl-2 and Caspase-3 so as to determine the optimal hypoxia time that was determined at 6 hours of hypoxia. Depending on whether adrenomedullin pretreatment was done, the cells were divided into control group (with no adrenomedullin pretreatment before hypoxia and ischemia) and adrenomedullin groups with different concentrations (1, 10, 100 μg/L). Afterwards, the expression of Bax, Bcl-2 and Caspase-3 was detected by using western blot assay.
RESULTS AND CONCLUSION: (1) After cultured in serum-free medium under hypoxia for 0, 3, 6, 9, 12 hours, the expression of Bax, Bcl-2 and Caspase-3 in bone marrow mesenchymal stem cells were increased (P < 0.05); 
at 6 hours of hypoxia, the Bax/Bcl-2 ratio and Caspase-3 expression reached the minimum value (P < 0.05). (2) At 6 hours of hypoxia, the expression of Bax and Caspase-3 protein as well as Bax/Bcl-2 ratio became the lowest in the
100 μg/L group compared with the 1 and 10 μg/L groups, but the expression of Bcl-2 protein reached the peak (P < 0.05). These findings indicate that adrenomedullin can reduce the expression of Bax/Bcl-2 ratio and Caspase-3 protein in bone marrow mesenchymal stem cells cultured in serum-free medium under hypoxic conditions, which is in a dose-dependent manner.

 中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Bone Marrow, Mesenchymal Stem Cells, Adrenomedullin, Apoptosis Regulatory Proteins

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