中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (13): 1969-1975.doi: 10.3969/j.issn.2095-4344.0430

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

长链非编码RNA-H19对缺血缺氧条件下骨髓间充质干细胞生存和血管再生能力的影响

侯婧瑛,汪 蕾,龙会宝,吴 浩,伍权华,钟婷婷,周长青,郭天柱,陈旭翔,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:2017-11-23 出版日期:2018-05-08 发布日期:2018-05-08
  • 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(81270213);国家自然科学基金(81670306);国家自然科学基金(81700242);广东省科技计划项目(2014A020211002);广东省科技计划项目(2017A020215176);高校基本科研业务费中山大学重大项目培育和新兴、交叉学科资助计划(17ykjc18);广东省医学科研基金(A2016264);广东省医学科研基金(A2017001)

Long non-coding RNA H19 facilitates bone marrow mesenchymal stem cell survival and vascularization in hypoxic-ischemic conditions in vitro

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

  1. Department of Emergency, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Revised:2017-11-23 Online:2018-05-08 Published:2018-05-08
  • 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. 81270213, 81670306, 81700242; the Science and Technology Plan Project of Guangdong Province, No. 2014A020211002, 2017A020215176; the Fundamental Research Funds for Culture, Innovation, Interdisciplinary Plan of Sun Yat-sen University, No. 17ykjc18; the Medical Research Foundation of Guangdong Province, No. A2016264, A2017001

摘要:

文章快速阅读:

文题释义:
增强骨髓间充质干细胞生存和血管再生能力的策略:
骨髓间充质干细胞移植的疗效仍难以令人满意,其中一个重要因素就是骨髓间充质干细胞移植后的生存力低下,新生血管形成较少。现阶段已有一些策略用于增强骨髓间充质干细胞的生存力和血管再生能力,如对骨髓间充质干细胞进行缺氧预处理,转染各种生长因子和抗凋亡基因等。
长链非编码RNA-H19(lncRNA-H19):lncRNA-H19是最早被发现的印记基因之一,在进化上高度保守,且不同物种间具有高度同源性。研究表明lncRNA-H19能够促进组织细胞生存和抑制凋亡。此外,其还能够调节血管形成。近年来的研究显示lncRNA-H19与骨髓间充质干细胞的扩增和分化密切相关。

 

摘要
背景:
课题组前期研究发现骨髓间充质干细胞(mesenchymal stem cells,MSCs)移植后其在局部梗死组织中的生存力低下,形成新生血管的密度较低,在一定程度上影响了其治疗的效率。长链非编码RNA-H19(lncRNA-H19)被证实与骨髓间充质干细胞分化及血管形成密切相关。
目的:体外观察lncRNA-H19对骨髓间充质干细胞在缺血缺氧条件下生存和血管再生能力的影响,并探讨其可能机制。
方法:体外培养的骨髓间充质干细胞分为5组:MSCs+H19组、MSCs+H19对照组(MSCs+H19 NC组),MSCs+si-H19组、MSCs+si-H19对照组(MSCs+si-H19 NC组)和MSCs组。其中MSCs+H19组和MSCs+H19 NC组分别予以转染lncRNA-H19及lncRNA-H19 scramble RNA阴性对照,MSCs+si-H19组和MSCs+si-H19 NC组分别转染lncRNA-H19 siRNA及lncRNA-H19 siRNA scramble阴性对照,体外缺血缺氧条件(无血清,体积分数为1% O2)下培养24 h,MTS法检测细胞增殖情况,TUNEL法检测细胞凋亡情况。取细胞培养基上清液分别刺激人脐静脉内皮细胞,观察血管形成情况。Western blot检测各组血管内皮生长因子A表达。
结果与结论:①与MSCs组及MSCs+H19 NC组相比,MSCs+H19组增殖能力显著增强,凋亡显著减少,血管管腔样结构明显增多(P < 0.01);②与MSCs组及MSCs+si-H19 NC组相比,MSCs+si-H19组增殖能力显著减弱,凋亡显著增加,血管管腔样结构明显减少(P < 0.01);③与MSCs组及MSCs+H19 NC组相比,MSCs+H19组血管内皮生长因子A表达显著增高;④与MSCs组及MSCs+si-H19 NC组相比,MSCs+si-H19组血管内皮生长因子A表达显著减少;⑤结果表明,lncRNA-H19促进骨髓间充质干细胞在体外缺血缺氧环境下的生存并增强其血管形成能力,此作用可能与其上调血管内皮生长因子A表达相关。

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
ORCID: 0000-0003-0492-2216(侯婧瑛)

关键词: 长链非编码RNA-H19, 缺血缺氧, 生存, 干细胞, 骨髓间充质干细胞, 血管再生, 血管内皮生长因子, 国家自然科学基金

Abstract:

BACKGROUND: Our previous study demonstrated that bone marrow mesenchymal stem cells (MSCs) presented with a low survival rate and newly formed vascular-like structures was sparsely distributed in the local infarct tissues after cell transplantation, which certainly impaired the therapeutic efficacy. Long non-coding RNA-H19 (lncRNA-H19) has been confirmed to be associated with MSCs differentiation and mediate vascularization.                  
OBJECTIVE: To observe the influence of lncRNA-H19 on the survival and vascularization potential of MSCs in vitro and to explore the possible mechanism.
METHODS: MSCs were obtained and cultured in vitro. Cells were divided into five groups: MSCs+H19, MSCs+H19 negative control (MSCs+H19 NC), MSCs+si-H19, MSCs+si-H19 negative control (MSCs+si-H19 NC) and MSCs groups. MSCs+H19 and MSCs+H19 NC groups were transfected with lncRNA-H19 and lncRNA-H19 scramble RNA respectively, while MSCs+siH19 and MSCs+si-H19 NC groups were transfected with lncRNA-H19 siRNA and lncRNA-H19 siRNA scramble respectively. Cells were cultured under hypoxic-ischemic condition (serum-free medium, 1% O2) for 24 hours. Then, cell proliferation and apoptosis were evaluated using MTS and TUNEL, respectively. Cell supernatant from each experimental group was further co-cultured with human umbilical vein endothelial cells to induce vascularization. The expression of vascular endothelial growth factor A (VEGFA) was thereafter detected using western blot assay
RESULTS AND CONCLUSION: Compared with MSCs+H19 NC and MSCs groups, MSCs+H19 group presented with significantly higher proliferation rate, lower apoptosis percentage and a larger number of vascular branches on matrigel (P < 0.01). There was a significantly higher expression of VEGFA in the MSCs+H19 group than MSCs+H19 NC and MSCs groups. Compared with the MSCs and MSCs+si-H19 NC groups, MSCs+H19 group presented with significantly lower proliferation rate, higher apoptosis percentage and a less number of vascular branches on matrigel (P < 0.01). In addition, VEGFA expression was distinctly downregulated in the MSCs+si-H19 group in comparison with the MSCs+si-H19 NC and MSCs groups. These findings indicate that lncRNA-H19 effectively promotes MSCs survival and vascularization under hypoxic-ischemic condition in vitro, and this effect may be associated with the upregulation of VEGFA.

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, Cell Hypoxia, Vascular Endothelial Growth Factor A, Tissue Engineering

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