中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (1): 70-77.doi: 10.3969/j.issn.2095-4344.2016.01.013

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

人羊膜间充质干细胞移植减轻体外循环再灌注肺损伤

强 勇1,梁贵友2,余丽梅3,齐 斌3,高振宇4   

  1. 1南京军区南京总医院心胸外科,江苏省南京市  2100022遵义医学院附属医院胸心血管外科,贵州省遵义市 563000;3遵义医学院附属医院贵州省细胞工程重点实验室,贵州省遵义市 563000;4遵义医学院外科动物实验中心,贵州省遵义市 563000
  • 收稿日期:2015-11-15 出版日期:2016-01-01 发布日期:2016-01-01
  • 通讯作者: 梁贵友,博士,教授,硕士生导师,遵义医学院附属医院胸心血管外科,贵州省遵义市
  • 作者简介:强勇,男,1978年生,江苏省兴化市人,汉族,硕士,主治医师,主要从事体外循环心肺损伤基础及临床研究。
  • 基金资助:
    贵州省科技攻关重点项目,黔科合SZ字【2014】3022号;遵义市科技攻关重点项目,遵市科合社字【2013】38号

Transplantation of human amnion-derived mesenchymal stem cells alleviates ischemia-reperfusion-induced acute lung injury after cardiopulmonary bypass

Qiang Yong1, Liang Gui-you2, Yu Li-mei3, Qi Bin3, Gao Zhen-yu4   

  1. 1Department of Cardiothoracic Surgery, Nanjing General Hospital of Nanjing Military Command, Nanjing 210002, Jiangsu Province, China; 2Department of Cardiothoracic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China; 3Key Laboratory of Cell Engineering in Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China; 4Surgical Animal Experiment Center, Zunyi Medical University, Zunyi 563000, Guizhou Province, China
  • Received:2015-11-15 Online:2016-01-01 Published:2016-01-01
  • Contact: Liang Gui-you, M.D., Professor, Master’s supervisor, Department of Cardiothoracic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China
  • About author:Qiang Yong, Master, Attending physician, Department of Cardiothoracic Surgery, Nanjing General Hospital of Nanjing Military Command, Nanjing 210002, Jiangsu Province, China
  • Supported by:

    the Scientific Tackle Key Project of Guizhou Province, No. [2014]3022; the Scientific Tackle Key Project of Zunyi City, No. [2013]38

摘要:

文章快速阅读:

文题释义:

人羊膜间充质干细胞移植:来源于人分娩后的胎盘,具有获取简单、几乎不受伦理学限制、来源丰富、免疫原性低、增殖能力强以及向3个胚层来源的组织细胞分化的潜能;人胎盘羊膜来源间充质干细胞低表达HLA-A、B、C,不表达HLA-DR,异种移植不发生免疫排斥反应,这些优势使得人胎盘羊膜来源间充质干细胞相比于其他来源间充质干细胞在器官或组织修复中展现了良好的前景。
体外循环相关肺损伤发生的机制:目前,关于体外循环肺损伤的具体机制仍不十分清楚,但一般认为是多因素、多环节共同作用的结果。多数专家认为可能与下列因素有关:肺缺血再灌注损伤,血液成分与体外循环人工管道的接触,全身炎症反应,内毒素血症,手术创伤应激等。

 

背景:近年来,间充质干细胞在器官或组织修复中展现了良好的前景,因此,基于间充质干细胞可塑性的细胞移植为体外循环后肺损伤的细胞再生及功能恢复提供了可能。

目的:探讨外源性移植人羊膜间充质干细胞对犬体外循环缺血再灌注肺损伤的影响,从炎性因子角度初步探讨其作用机制。
方法:健康成年杂种犬18只,随机分为空白组(建立体外循环模型,主动脉不阻断+股静脉注射1 mL生理盐)、对照组(体外循环+主动脉阻断1 h+主动脉开放15 min后股静脉注射1 mL生理盐水)、实验组(体外循环+ 主动脉阻断1 h+主动脉开放15 min后股静脉注射含2×107人羊膜间充质干细胞的生理盐水1 mL),每组6只。分别在体外循环前(T1)、主动脉开放后15 min(T2)、开放后1 h (T3)、开放后2 h(T4)、开放后3 h(T5)5个时间点,各取动脉血2 mL计算氧合指数和呼吸指数,取静脉血8 mL分别用ELISA法检测血清肿瘤坏死因子α、基质金属蛋白酶9、白细胞介素8、白细胞介素10水平,Western Blot印迹法检测肺组织NF-κB蛋白表达,同时光镜下观察各组肺组织病理学变化。
结果与结论:①与对照组比较,实验组氧合指数在人羊膜间充质干细胞移植后2,3 h显著升高,实验组呼吸指数在人羊膜间充质干细胞移植后1,2,3 h显著下降。②与对照组同时间点相比,实验组肿瘤坏死因子α、白细胞介素8以及基质金属蛋白酶9呈明显下降趋势,白细胞介素10有所回升。③与空白组相比,对照组开放后3 h肺组织NF-κB蛋白明显增强,静脉注入人羊膜间充质干细胞后肺组织NF-κB表达较对照组显著降低。④实验组在主动脉开放后,病理改变明显轻于对照组,可见少量间隙内渗出红细胞与中性粒细胞,微血管扩张、充血。⑤结果表明,人羊膜间充质干细胞静脉移植可通过下调促炎因子肿瘤坏死因子α、白细胞介素8,降低基质金属蛋白酶9水平,上调抗炎因子白细胞介素10水平,抑制肺组织NF-κB活化,减轻体外循环缺血再灌注相关肺损伤。 

关键词: 干细胞, 移植, 体外循环, 缺血再灌注, 肺损伤, 人羊膜间充质干细胞, 核因子κB, 细胞因子

Abstract:

BACKGROUND: In recent years, mesenchymal stem cells exhibit a good prospect in organ or tissue repair and therefore, and therefore, cell transplantation based on mesenchymal stem cell plasticity can promote cell regeneration and functional recovery from lung injury after cardiopulmonary bypass.
OBJECTIVE: To investigate the effects of human amnion-derived mesenchymal stem cells (hAMSCs) transplantation on ischemia-reperfusion-induced acute lung injury in dogs after cardiopulmonary bypassand its mechanism for regulating inflammatory cytokines.
METHODS: Eighteen adult healthy mongrel dogs were randomly divided into three groups (n=6 per group): black group (cardiopulmonary bypass with 1 mL physiological saline injection via the femoral vein without blocking the aorta), control group (cardiopulmonary bypass with blocking the aorta for 1 hour and then opening the aorta for 15 minutes plus 1 mL physiological saline injection via the femoral vein), experiment group (cardiopulmonary bypass with blocking the aorta for 1 hour and then opening the aorta for 15 minutes plus femoral vein injection of 1 mL physiological saline containing 2×107 hAMSCs). Arterial blood samples of 2 mL were taken to calculate oxygenation index and respiratory index before cardiopulmonary bypass (T1), 15 minutes (T2), 1 hour (T3), 2 hours (T4), 3 hours (T5) after opening the aorta. 8 mL intravenous blood samples were taken to detect the serum tumor necrosis factor α, matrix metalloproteinase-9, interleukin-8 and interleukin-10 by ELISA. Meanwhile, western blot assay was used to detect the expression of nuclear factor-κB in lung tissues, and histopathological changes of lung tissues observed under optical microscope.
RESULTS AND CONCLUSION: Compared with the control group, the oxygenation index was significantly increased in the experimental group at 2 and 3 hours after transplantation, and the respiratory index was remarkably decreased at 1, 2, 3 hours after transplantation. Compared with the control group, the levels of tumor necrosis factor α, matrix metalloproteinase-9 and interleukin-8 were significantly decreased in the experimental group, but the level of interleukin-10 was increased in the experimental group. Compared with the blank group, the expression of nuclear factor-κB was significantly strengthened in the control group at 3 hours after opening the aorta, but it was decreased significantly after intravenous injection of hAMSCs. After opening the aorta, the pathological changes in the experimental group were remarkably milder than those in the control group, and a small amount of red blood cells and neutrophils exuded, with telangiectasia, and congestion, were found in the experimental group. These findings indicate that hAMSCs transplantation can mitigate ischemia-reperfusion- induced acute lung injury after cardiopulmonary bypass by adjusting the level of nuclear factor-κB in lung tissues and release of tumor necrosis factor α, matrix metalloproteinase-9, interleukin-8 and interleukin-10. 

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