中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (6): 820-826.doi: 10.3969/j.issn.2095-4344.2016.06.009

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

人端粒酶反转录酶基因修饰人羊膜间充质干细胞移植治疗肺动脉高压

张 超1,曹 洁2,张素芳3   

  1. 1天津医科大学研究生院,天津市津南区咸水沽医院内科,天津市 300350;2天津医科大学总医院呼吸科,天津市 300052;3天津市津南区八里台镇卫生院,天津市 300350
  • 收稿日期:2016-01-09 出版日期:2016-02-05 发布日期:2016-02-05
  • 通讯作者: 曹洁,硕士,主任医师,天津医科大学总医院呼吸科,天津市 300052
  • 作者简介:张超,男,1985年生,河北省保定市人,汉族,2009年河北医科大学毕业,硕士,主治医师,主要从事呼吸内科研究。

Transplantation of human telomerase reverse transcriptase-transfected human amniotic mesenchymal stem cells in the treatment of pulmonary hypertension

Zhang Chao1, Cao Jie2, Zhang Su-fang3   

  1. 1Department of Internal Medicine, Xianshuigu Hospital of Jinnan District, Graduate School of Tianjin Medical University, Tianjin 300350, China; 2Department of Respiratory Medicine, General Hospital of Tianjin Medical University, Tianjin 300052, China; 3Health Center of Balitai Town, Tianjin 300350, China
  • Received:2016-01-09 Online:2016-02-05 Published:2016-02-05
  • Contact: Cao Jie, Master, Chief physician, Department of Respiratory Medicine, General Hospital of Tianjin Medical University, Tianjin 300052, China
  • About author:Zhang Chao, Master, Attending physician, Department of Internal Medicine, Xianshuigu Hospital of Jinnan District, Graduate School of Tianjin Medical University, Tianjin 300350, China

摘要:

文章快速阅读:

文题释义:

表观遗传修饰:几十年来,DNA一直被认为是决定生命遗传信息的核心物质,但是近些年新的研究表明,生命遗传信息从来就不是基因所能完全决定的,比如科学家们发现,可以在不影响DNA序列的情况下改变基因组的修饰,这种改变不仅可以影响个体的发育,而且还可以遗传下去。这种在基因组水平上研究表观遗传修饰的领域被称为“表观基因组学”。表观基因组学使人们对基因组的认识又增加了一个新视点:对基因组而言,不仅仅是序列包含遗传信息,而且其修饰也可以记载遗传信息。
基因修饰:主要是指利用生物化学方法修改DNA序列,将目的基因片段导入宿主细胞内,或者将特定基因片段从基因组中删除,从而达到改变宿主细胞基因型或者使得原有基因型得到加强的作用。

 

背景:随着干细胞移植治疗技术的发展及基因修饰技术的兴起为肺动脉高压的治疗提供了新的思路和方法。
目的:观察人端粒酶反转录酶基因修饰人羊膜间充质干细胞移植对肺动脉高压大鼠的治疗效果。
方法:66只成年雌性Wistar大鼠给予野百合碱腹腔注射(60 mg/kg)进行肺动脉高压模型复制,造模成功63只随机分成3组,其中肺动脉高压组于颈内静脉移植1 mL的L-DMEM培养基,人羊膜间充质干细胞组于颈内静脉移植1 mL人羊膜间充质干细胞悬液,人端粒酶反转录酶组于颈内静脉移植1 mL人端粒酶反转录酶转染人羊膜间充质干细胞悬液。移植后3周观察对比各组大鼠血流动力学、血浆内皮素1水平,以及右心室的肥大指数及心肌细胞凋亡情况。

结果与结论:①治疗3周后各组间大鼠动脉血压差异无显著性意义(P > 0.05);人端粒酶反转录酶组大鼠肺动脉收缩期压力和平均肺动脉压明显低于肺动脉高压组、人羊膜间充质干细胞组,差异有显著性意义(P < 0.05)。②各组大鼠右心室的肥大指数差异无显著性意义(P > 0.05)。③与肺动脉高压组及人羊膜间充质干细胞组相比,人端粒酶反转录酶组大鼠血浆内皮素1水平显著降低,差异有显著性意义(P < 0.05)。④人端粒酶反转录酶组心肌细胞凋亡数较人羊膜间充质干细胞组和肺动脉高压组明显减少。⑤结果显示携带人端粒酶反转录酶基因的人羊膜间充质干细胞移植能够改善肺动脉高压大鼠的血流动力学异常状态,还可以保护机体血管内皮细胞,减少心肌细胞的凋亡。 

ORCID: 0000-0003-2401-0580 (张超)

关键词: 干细胞, 移植, 人羊膜间充质干细胞, 人端粒酶反转录酶, 肺动脉高压, 内皮素1, 血流动力学, 细胞凋亡

Abstract:

BACKGROUND: The development of stem cell transplantation and genetic modification technology provides new ideas and methods for the treatment of pulmonary hypertension.
OBJECTIVE: To investigate the therapeutic effects of transplantation of human telomerase reverse transcriptase (hTERT)-transfected human amniotic mesenchymal stem cells in pulmonary hypertension rats.
METHODS: Human amniotic mesenchymal stem cells were cultured and purified in vitro, and then transfected with adenovirus-medicated hTERT. Sixty-six adult Wistar rats were enrolled to prepare pulmonary hypertension models through intraperitoneal injection of 60 mg/kg monocrotaline and then 63 model rats were randomly assigned into three groups: model group treated with transplantation of 1 mL of L-DMEM via the jugular vein, cell transplantation group treated with transplantation of 1 mL of untransfected human amniotic mesenchymal stem cell suspension, and transfection group treated with transplantation of 1 mL of human amniotic mesenchymal stem cell suspension transfected with hTERT. Hemodynamic changes, plasma endothelin-1 level, hypertrophy index of the right ventricle and myocardial cell apoptosis were compared among different groups at 3 weeks after transplantation.
RESULTS AND CONCLUSION: After 3 weeks of treatment, there were no differences in the arterial blood pressure of the three groups (P > 0.05); however, the systolic pressure of the pulmonary artery and mean pulmonary arterial pressure were significantly lower in the transfection group than the model group and cell transplantation group (P < 0.05). Hypertrophy index of the right ventricle had no difference among the three groups (P > 0.05). The level of plasma endothelin-1 was significantly lower in the transfection group than the model group and cell transplantation group (P < 0.05). Apoptosis in myocardial cells was significantly reduced in the transfection group compared with the model group and cell transplantation group (P < 0.05). Experimental findings suggest that the transplantation of hTERT-transfected human amniotic mesenchymal stem cells can improve the hemodynamic levels in pulmonary blood vessels of pulmonary hypertension rats to protect vascular endothelial cells and reduce myocardial cell apoptosis.