中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (28): 4196-4202.doi: 10.3969/j.issn.2095-4344.2016.28.014

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

人脐血单个核细胞中CD133+细胞移植治疗心力衰竭的评价

马  力,谢宜旭,常  羽,姚  磊   

  1. 郑州大学附属郑州中心医院心胸外科,河南省郑州市  450000
  • 修回日期:2016-05-03 出版日期:2016-07-01 发布日期:2016-07-01
  • 作者简介:马力,男,1973年生,河南省开封市人,汉族,1997年河南医科大学毕业,副主任医师,主要从事心胸外科治疗的研究。

Influences of CD133+ cells on human umbilical cord blood mononuclear cell transplantation for treating heart failure

Ma Li, Xie Yi-xu, Chang Yu, Yao Lei   

  1. Department of Cardiothoracic Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan Province, China
  • Revised:2016-05-03 Online:2016-07-01 Published:2016-07-01
  • About author:Ma Li, Associate chief physician, Department of Cardiothoracic Surgery, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou 450000, Henan Province, China

摘要:

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文题释义:
CD133+细胞:
是单个核细胞群中一类纯化细胞,具有非常高的倍增特性和较好的血管新生潜能,具有分化为层状心肌内皮细胞的能力,可改善心肌缺血,利于心肌修复。
干细胞表面特异性抗原CD133、CD34:造血系统中,CD133在35%-75%的CD34+细胞亚群上表达,主要见于人类胎肝、骨髓、脐血、外周血中CD34bright干细胞和前体细胞。CD133也见于这些组织的一小部分CD34-细胞,在成熟的血细胞上不表达。与CD34抗原不同的是,CD133在晚期祖细胞,如前B细胞、红系集落形成单位、粒系集落形成单位上不表达。最近发现CD133还可以作为其他非造血干、祖细胞的表面标志,如神经干细胞、胚胎干细胞系和具有多向分化潜能的成熟干细胞,这些细胞均为CD34-细胞。

 

摘要
背景:
细胞纯化方法可以消除细胞的生物变异性,为细胞再生治疗提供了新的思路。
目的:探讨CD133+细胞在人脐血单个核细胞移植治疗心力衰竭中的作用。
方法:①采用淋巴细胞分离液法提取人脐血单个核细胞,经免疫磁珠分离CD133+细胞及CD133-细胞,调整细胞浓度为1×108 L-1;②将40只SD大鼠随机分为5组:假手术组、模型组、CD133+细胞组、CD133-细胞组和单个核细胞组,除假手术组,其余4组腹腔注射异丙肾上腺素建立心脏衰竭模型,CD133+细胞组经尾静脉注射1 mL CD133+细胞和1 mL PBS,CD133-细胞组经尾静脉注射1 mL CD133-细胞和1 mL PBS,单个核细胞组经大鼠尾静脉注射1 mL CD133+细胞和1 mL CD133-细胞,假手术组和模型组经尾静脉注射2 mL PBS;③细胞移植后4周,观察大鼠的心肌病理组织学改变,心肌纤维化程度以及CD133+细胞在心肌内的定植情况。
结果与结论:①苏木精-伊红染色结果:模型组大鼠心肌排列紊乱,假手术组心肌排列整齐,CD133+细胞组心肌紊乱程度最轻,单个核细胞组其次,CD133-细胞组和模型组接近;②Masson染色结果:模型组胶原纤维增多,排列紊乱,胶原纤维断裂,假手术组胶原纤维很少,排列整齐,CD133+细胞组心肌胶原纤维减少和紊乱程度最轻;③模型组、CD133+细胞组、CD133-细胞组和单个核细胞组的胶原纤维面积均明显高于假手术组(P < 0.05),其中CD133+细胞组的胶原纤维面积最小;④免疫组化和免疫荧光染色结果:在移植后4周各组大鼠心肌组织中均未发现特异性染色细胞;⑤结果表明,CD133+细胞移植治疗可以改善心肌受损程度,减少心肌纤维化程度,其治疗效果较单个核细胞移植治疗效果好,CD133+细胞并未定植于心脏局部。

 

 

 

关键词: 干细胞, 移植, 脐血, 单个核细胞, CD133+细胞, 心力衰竭, 纤维化, 细胞移植

Abstract:

BACKGROUND: Cell purification can eliminate the biological variability of cells, providing new insight into cell regeneration therapy.
OBJECTIVE: To study the Influence of CD133+ cells on human umbilical cord blood mononuclear cell transplantation for treatment of heart failure.
METHODS: Human cord blood mononuclear cells were isolated using lymphocyte separation medium method, and CD133+ and CD133- cells were sorted using immunomagnetic beads at a cell density of 1×108/L. Forty Sprague-Dawley rats were randomized into five groups: sham group, model group, CD133+ cell group, CD133- cell group and mononuclear cell group. Animal models of heart failure were made using intraperitoneal injection of isoproterenol in all the groups except for the sham group. Rats in the CD133+ cell group and CD133- cell group were given 1 mL CD133+ cells plus 1 mL PBS and 1 mL CD133- cells plus 1 mL PBS via the tail vein, respectively. Rats in the mononuclear cell group were given 1 mL CD133+ cells plus 1 mL CD133- cells via the tail vein, and those in the sham and model groups given 2 mL PBS via the tail vein. After 4 weeks, cardiac pathology, degree of myocardial fibrosis and colonization of CD133+ cells in myocardial tissues were observed.
RESULTS AND CONCLUSION: Hematoxylin-eosin staining showed that myocardial tissues arranged disorderly in the model group, but regularly in the sham group; myocardial disorders were mildest in the CD133+ cell group, successively followed by the mononuclear cell group, and severest in the CD133- cell group and model group. Masson staining showed that in the model group, collagen fibers were proliferated, arranged irregularly and even broken, while in the sham group, the collagen fibers were less in number and arranged in order. Additionally, there was less reduction in collagen fibers and milder myocardial disorders in the CD133+ cell group compared with the other groups. Area of collagen fibers was increased significantly in all the groups except for the sham group (P < 0.05), but this increment was the minimal in the CD133+ cell group. Findings from immunohistochemistry and immunofluorescence staining showed that there were no CD133+ cells in the myocardial tissues of rats. Therefore, our data indicate that compared with the mononuclear cell transplantation, CD133+ cell transplantation exerts superiorities in relieving myocardial damage and reducing myocardial fibrosis. However, CD133+ cells are not colonized in the myocardial tissue after transplantation.

 

 

Key words: Cord Blood Stem Cell Transplantation, Heart Failure, Membrane Glycoproteins, Tissue Engineering

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