中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (1): 6-12.doi: 10.3969/j.issn.2095-4344.2017.01.002

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

apelin干预骨髓间充质干细胞在缺血缺氧条件下的生存和血管再生

侯婧瑛,汪  蕾,钟婷婷,周长青,郭天柱,龙会宝,伍权华,郑韶欣,吴  浩,王  彤   

  1. 中山大学孙逸仙纪念医院急诊科,广东省广州市  510120
  • 修回日期:2016-11-28 出版日期:2017-01-08 发布日期:2017-03-15
  • 通讯作者: 王彤,博士,博士生导师,教授,主任医师,研究员,中山大学孙逸仙纪念医院急诊科,广东省广州市 510120
  • 作者简介:侯婧瑛,女,1985年生,安徽省庐江县人,汉族,2012年中山大学孙逸仙纪念医院毕业,硕士,主治医师,主要从事干细胞与心血管疾病方面的研究。
  • 基金资助:

    国家自然科学基金(81070125);国家自然科学基金(81270213);国家自然科学基金(81670306);广东省科技计划项目(2014A020211002);广东省科技计划项目(2010B031600032);高校基本科研业务费中山大学青年教师重点培育项目(13ykzd16);广东省医学科研基金(A2016264)

Influence of apelin on survival and vascularization potential of bone marrow mesenchymal stem cells under hypoxic and ischemic conditions

Hou Jing-ying, Wang Lei, Zhong Ting-ting, Zhou Chang-qing, Guo Tian-zhu, Long Hui-bao, Wu Quan-hua, Zheng Shao-xin, Wu Hao, Wang Tong   

  1. Department of Emergency, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Revised:2016-11-28 Online:2017-01-08 Published:2017-03-15
  • Contact: Wang Tong, M.D., Doctoral supervisor, Professor, Chief physician, Researcher, Department of Emergency, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • About author:Hou Jing-ying, Master, Attending physician, Department of Emergency, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81070125, 81270213, 81670306; the Scientific Plan Projects of Guangdong Province, No. 2014A020211002, 2010B031600032; Fundamental Research Funds for the Universities for Young Teachers Cultivation in Sun Yat-sen University, No. 13ykzd16; the Medical Science Research Fund of Guangdong Province, No. A2016264

摘要:

文章快速阅读:


文题释义:
血管紧张素受体AT1相关的受体蛋白内源性配体(putative receptor protein related to the angiotensin receptor AT1 endogenous ligand, apelin):
血管紧张素受体AT1相关的受体蛋白(putative receptor protein related to the angiotensin receptor AT1, APJ)是G蛋白耦联大家族中的一种跨膜蛋白,apelin作为APJ的内源性配体,与APJ构成apelin/APJ系统。apelin在不同组织的血管内皮细胞中均有表达,在血管平滑肌细胞和心肌细胞中也有一定的表达,在参与血管功能的维持和调控中具有重要作用。
血管内皮生长因子:也称血管通透性因子或促血管素,最初是由多种培养的肿瘤细胞系中发现的一种新型的生长因子,它能增加微血管与小静脉血管的通透性。后来发现,该因子特异性地作用于血管内皮细胞,并促进血管内皮细胞的增殖,所以定名为血管内皮生长因子。

 

摘要
背景:
课题组前期研究发现骨髓间充质干细胞移植能够改善大鼠心肌梗死后心功能,但整体效果并不太理想,骨髓间充质干细胞在心肌梗死组织局部的生存力和新生血管密度低下。
目的:观察血管紧张素受体AT1相关的受体蛋白内源性配体(apelin)对骨髓间充质干细胞在缺血缺氧条件下的生存和血管形成能力的影响并探讨相关机制。
方法:体外培养的骨髓间充质干细胞分为骨髓间充质干细胞组和骨髓间充质干细胞+apelin组,分别于正常条件(完全培养基,体积分数为20%O2)和缺血缺氧条件(无血清,体积分数为1%O2)下培养24 h,其中骨髓间充质干细胞+apelin组在培养同时加入apelin-13(5 μmol/L)刺激骨髓间充质干细胞。MTS法检测细胞增殖能力,TUNEL法检测细胞凋亡情况。取细胞培养液分别刺激人脐静脉内皮细胞,观察骨髓间充质干细胞血管形成能力。Western blot检测骨髓间充质干细胞中血管内皮生长因子的表达。 结果与结论:与骨髓间充质干细胞组相比较,骨髓间充质干细胞+apelin组正常条件和缺血缺氧条件下扩增能力显著增强,凋亡减少,血管管腔样结构明显增多,血管内皮生长因子的表达明显增高。以上结果提示apelin能够增强骨髓间充质干细胞在缺血缺氧环境下的生存和血管形成能力,此效应可能与其上调血管内皮生长因子的表达相关。

 

 

关键词: 干细胞, 骨髓干细胞, 血管紧张素受体AT1相关的受体蛋白, 骨髓间充质干细胞, 缺血缺氧, 血管形成, 血管内皮生长因子, 国家自然科学基金

Abstract:

BACKGROUND: Our previous work demonstrated that bone marrow mesenchymal stem cells (BMSCs) transplantation could improve cardiac function in rats with myocardial infarction. However, the overall efficacy was not satisfactory. The implanted cells presented a low survival rate and newly formed vascular-like structures were sparse in the local infarct tissues.
OBJECTIVE: To observe the influence of putative receptor protein related to the angiotensin receptor AT1 endogenous ligand (apelin) on the survival and vascularization potential of BMSCs in hypoxic and ischemic conditions and to investigate relevant mechanisms.
METHODS: The bone marrow mesenchymal stem cells were obtained and cultured in vitro with or without apelin-13
(5 μmol/L) stimulation under hypoxic-ischemic condition (serum-free medium, 1% O2) for 24 hours, or cultured under normoxia (complete culture medium, 20% O2) as a negative control during the whole process. All the experimental groups were further co-cultured with human umbilical vein endothelial cells to promote vascular differentiation for another 6 hours. Cell proliferation, apoptosis, and vascular density were assessed and the expression of vascular endothelial growth factor was detected using western blot assay thereafter.
RESULTS AND CONCLUSION: Compared with the BMSCs group, BMSCs+apelin group presented more rapid cell growth, higher proliferation rate, and lower apoptosis percentage under normoxic and hypoxic conditions. In the BMSCs+apelin group, a larger number of vascular branches formed on matrigel under normoxic and hypoxic-ischemic conditions; and the expression of vascular endothelial growth factor was significantly enhanced. These findings suggest that apelin could effectively promote BMSCs survival and vascularization under hypoxic-ischemic conditions in vitro. It might function via upregulating the expression of vascular endothelial growth factor.

 

 

Key words: Bone Marrow, Mesenchymal Stem Cells, Receptor, Angiotensin, Type 1, Ligands, Cell Proliferation, Apoptosis, Cardiovascular Physiological Processes, Tissue Engineering

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