中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (19): 2958-2963.doi: 10.12307/2022.371

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

5-氮胞苷联合骨形态发生蛋白2诱导骨髓间充质干细胞向心肌样细胞分化

王文华1,2,刘  洋2,王巧敏1,2,吕  洋2,赵亚如1,2,王海萍2   

  1. 河北北方学院,1基础医学院组织学与胚胎学教研室,2干细胞与生殖生物学实验室,河北省张家口市  075000
  • 收稿日期:2020-11-11 修回日期:2020-12-14 接受日期:2021-04-29 出版日期:2022-07-08 发布日期:2021-12-28
  • 通讯作者: 王海萍,博士,教授,硕士研究生导师,河北北方学院干细胞与生殖生物学实验室,河北省张家口市 075000
  • 作者简介:王文华,女,1992年生,河北省张家口市人,汉族,在读硕士,主要从事骨髓间充质干细胞向心肌细胞分化的相关研究。
  • 基金资助:
    河北省自然科学基金(C2019405091),项目负责人:王海萍;河北省高等学校科学技术研究项目(ZD2019066),项目负责人:王海萍

5-Azacytidine combined with bone morphogenetic protein 2 induces differentiation of bone marrow mesenchymal stem cells into cardiomyocyte-like cells

Wang Wenhua1, 2, Liu Yang2, Wang Qiaomin1, 2, Lü Yang2, Zhao Yaru1, 2, Wang Haiping2   

  1. 1Department of Histology and Embryology, Basic Medical College, 2Stem Cell and Reproductive Biology Laboratory, Hebei North University, Zhangjiakou 075000, Hebei Province, China
  • Received:2020-11-11 Revised:2020-12-14 Accepted:2021-04-29 Online:2022-07-08 Published:2021-12-28
  • Contact: Wang Haiping, MD, Professor, Master’s supervisor, Stem Cell and Reproductive Biology Laboratory, Hebei North University, Zhangjiakou 075000, Hebei Province, China
  • About author:Wang Wenhua, Master candidate, Department of Histology and Embryology, Basic Medical College, and Stem Cell and Reproductive Biology Laboratory, Hebei North University, Zhangjiakou 075000, Hebei Province, China
  • Supported by:
    Hebei Natural Science Foundation, No. C2019405091 (to WHP); Science and Technology Research Project of Hebei University, No. ZD2019066 (to WHP)

摘要:

文题释义:
骨形态发生蛋白2:属于转化生长因子β超家族一员,它可以对多种细胞的增殖、生存、分化和凋亡具有调节作用。在胚胎发育过程中,骨形态发生蛋白是心肌发育的一个关键上游信号,因此在一定条件下它可以促进骨髓间充质干细胞分化成为心肌样细胞。
骨髓间充质干细胞:是一类具有多向分化潜能的成体干细胞,在一定条件下可以诱导分化为多种功能性细胞,包括骨细胞、脂肪细胞、软骨细胞、心肌细胞等。除此之外,骨髓间充质干细胞具有获取分离容易、操作简单等特点,可大量培养扩增,并具有免疫调节作用。

背景:干细胞已成为组织工程中理想的种子细胞,为细胞移植治疗心肌梗死提供了研究方向。
目的:探讨骨形态发生蛋白2联合5-氮胞苷体外诱导骨髓间充质干细胞向心肌样细胞分化的可行性。
方法:采用全骨髓贴壁法培养骨髓间充质干细胞,将第3代骨髓间充质干细胞进行分组诱导,分别为对照组(普通IMDM培养基)、骨形态发生蛋白2组(200 ng/L)、5-氮胞苷组(10 µmol/L)、5-氮胞苷+骨形态发生蛋白2组。诱导3 d后更换正常培养基继续培养4周,免疫细胞化学法检测cTnI的表达,免疫荧光化学法检测Desmin、cTnT的表达,Western blot检测cTnT和cTnI的表达;诱导3 d后更换正常培养基继续培养1,2,4周,采用RT-qPCR检测心肌早期转录因子GATA-4、Nkx2.5 mRNA的表达。
结果与结论:①Western blot检测诱导组均表达cTnT、cTnI,联合诱导组cTnT、cTnI的表达高于单独诱导组(P < 0.01);②免疫细胞化学法检测诱导组cTnI均呈阳性表达,联合诱导组高于单独诱导组(P < 0.05);免疫荧光细胞化学法检测诱导组Desmin、cTnT均呈阳性表达,联合诱导组高于单独诱导组(P < 0.05);③RT-qPCR检测诱导组均有GATA-4、Nkx2.5 mRNA的表达,联合诱导组高于单独诱导组(P < 0.05);④结果表明,骨髓间充质干细胞经5-氮胞苷和骨形态发生蛋白2联合诱导后可以提高心肌样细胞的分化效率。 

https://orcid.org/0000-0002-7342-3827(王文华) 

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, 骨髓间充质干细胞, 心肌样细胞, 骨形态发生蛋白2, 5-氮胞苷, SD大鼠

Abstract: BACKGROUND: Stem cells have become ideal seed cells in tissue engineering, which provides a research direction for cell transplantation in the treatment of myocardial infarction.
OBJECTIVE: To investigate the feasibility of bone morphogenetic protein 2 combined with 5-azacytidine on the differentiation of bone marrow mesenchymal stem cells into cardiomyocyte-like cells in vitro.
METHODS: Bone marrow mesenchymal stem cells were cultured by whole bone marrow culture adherent method. The third generation of bone marrow mesenchymal stem cells was divided into four groups: control group (ordinary Iscove’s modified Dulbecco’s medium), bone morphogenetic protein 2 group (200 ng/L), 5-azacytidine group (10 µmol/L), 5-azacytidine and bone morphogenetic protein 2 group. After induction for 3 days, the normal medium was changed and cultured for 4 weeks. The expression of cTnI was detected by immunocytochemistry. The expression of Desmin and cTnT was detected by immunofluorescence. The expression of cTnT and cTnI was detected by western blot assay. After 3 days of induction, the normal medium was changed and cultured for 1, 2 and 4 weeks. The mRNA expression of GATA-4 and Nkx2.5 was detected by RT-qPCR.  
RESULTS AND CONCLUSION: (1) Western blot assay showed that cTnT and cTnI were expressed in the induction group. The expression levels of cTnT and cTnI in the combined group were higher than those in other groups (P < 0.01). (2) Immunocytochemistry showed positive expression of cardiac troponin (cTnI) in the induction group; the expression was higher in the combined group than that in the induction group (P < 0.05). Immunofluorescence cytochemistry assay showed the positive expression of Desmin and cTnT; the expression in the combined group was higher than that in the induction group (P < 0.05). (3) RT-qPCR showed the mRNA expression of GATA-4 and Nkx2.5 in the induction group; the expression was higher in the combined group than that in the induction group (P < 0.05). (4) The results showed that bone marrow mesenchymal stem cells induced by 5-azacytidine and bone morphogenetic protein 2 could improve the differentiation efficiency of cardiomyocyte-like cells. 

Key words: stem cells, bone marrow mesenchymal stem cells, myocardial like cells, bone morphogenetic protein 2, 5-azacytidine, SD rats

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