间充质干细胞移植减轻大鼠盐酸吸入性肺损伤

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间充质干细胞移植减轻大鼠盐酸吸入性肺损伤

作者:吴晓丹,贾庆安,钱梦佳,隆玄,李善群,宋元林,王向东,白春学 来源:《中华急诊医学杂志》2013年第06期

【摘要】目的 研究骨髓间充质干细胞(BMSCs)移植对大鼠盐酸吸入性肺损伤的作用与机制。方法 本实验于复旦大学附属中山医院实验研究中心进行。改良贴壁法分离培养Sprague-Dawley(SD)大鼠BMSCs。24只SD大鼠随机(随机数字法)分为3组(n=8):对照组,损伤组和移植组。损伤组和移植组气道内滴注盐酸 (1.2 ml/kg, pH=1.5),对照组则滴入等量磷酸缓冲盐溶液(PBS),用动脉血气、肺组织湿干比和病理改变评价模型是否成功建立。移植组于颈外静脉注射5×106个BMSCs,其他2组注入0.5 ml的PBS。移植6 h后行动脉血气分析,酶联免疫吸附法(ELISA)测定血清和支气管肺泡灌洗液(BALF)的肿瘤坏死因子-α(TNF-α)、白介素-6(IL-6) 和 白介素-10(IL-10)质量浓度,观察肺组织病理改变和测定肺组织湿干比。体外实验中,BMSCs与损伤肺细胞或正常肺细胞于Transwell体系共培养36 h,观察损伤肺影响BMSCs迁移情况;另取BMSCs与损伤肺细胞混合培养或于Transwell中培养,正常肺细胞或损伤肺细胞单独培养作对照,6 h后检测上清液中TNF-α、IL-6和IL-10质量浓度。用方差分析比较多组间的差异,独立样本t检验比较两组间差异。结果 BMSCs移植改善了肺损伤大鼠的低氧血症(P0.05)。体外实验中,BMSCs向损伤肺迁移明显多于向正常肺迁移(P0.05)。结论 BMSCs移植可以减轻大鼠盐酸吸入性肺损伤,可能机制为干细胞通过旁分泌途径下调炎症反应。

【关键词】间充质干细胞;吸入性肺损伤;大鼠;盐酸;骨髓;肿瘤坏死因子-α;白介素-6;白介素-10

Bone marrow-derived mesenchymal stem cells alleviate lung injury in a rat model of acid

aspiration WU Xiao-dan, JIA Qing-an, QIAN Meng-jia, LONG Xuan, LI Shan-qun, SONG Yuan-lin, WANG Xiang-dong, BAI Chun-xue.Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, 200032, China

Corresponding author: BAI Chun-xue, Email: bai.chunxue@zs-hospital.sh.cn 【Abstract】Objective To investigate the effects and the possible mechanism of bone mesenchymal stem cells (BMSCs) transplantation in rat model of acid aspiration induced lung injury. Methods BMSCs cultures were obtained from bone marrow of Sprague-Dawley (SD) rats. Twenty-four SD rats were randomly divided into 3 groups: Control, Injury and Injury + BMSCs groups, and hydrochloric acid (HCl ) (1.2 ml/kg, pH=1.5) or the same volume of phosphate buffered saline (PBS) instead were instilled into trachea of rats to make injury models or for control group respectively. Then, 5×106 BMSCs or 0.5 ml PBS were injected into jugular vein of

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