中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (1): 61-66.doi: 10.3969/j.issn.2095-4344.2124

• 脐带脐血干细胞 umbilical cord blood stem cells • 上一篇    下一篇

人脐带间充质干细胞过表达白细胞介素8受体可抑制炎症反应和促进血管修复

朱兵兵,何海斌,邓江华,王文强,慕晓玲   

  1. 石河子大学医学院,新疆维吾尔自治区石河子市   832000
  • 收稿日期:2019-11-01 修回日期:2019-11-12 接受日期:2020-01-07 出版日期:2021-01-08 发布日期:2020-10-29
  • 通讯作者: 慕晓玲,博士,教授,石河子大学医学院,新疆维吾尔自治区石河子市 832000
  • 作者简介:朱兵兵,女,1995年生,新疆维吾尔自治区沙湾县人,汉族,在读硕士,主要从事干细胞的基础与应用研究。
  • 基金资助:
    新疆兵团社会发展科技攻关与成果转化计划(2016AD013);自治区研究生教育创新计划科研创新项目(XJGRI201604)

Human umbilical cord mesenchymal stem cells overexpressing interleukin 8 receptor inhibit inflammation and promote vascular repair

Zhu Bingbing, He Haibin, Deng Jianghua, Wang Wenqiang, Mu Xiaoling   

  1. School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China
  • Received:2019-11-01 Revised:2019-11-12 Accepted:2020-01-07 Online:2021-01-08 Published:2020-10-29
  • Contact: Mu Xiaoling, MD, Professor, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China
  • About author:Zhu Bingbing, Master candidate, School of Medicine, Shihezi University, Shihezi 832000, Xinjiang Uygur Autonomous Region, China
  • Supported by:
    新疆兵团社会发展科技攻关与成果转化计划(2016AD013),项目负责人:慕晓玲;自治区研究生教育创新计划科研创新项目(XJGRI201604)

摘要:

文题释义:
脐带间充质干细胞:具有自我更新和多向分化潜能,免受异体移植排斥反应,通过旁分泌和自分泌作用释放多种生物活性因子,抑制炎症反应,进行免疫调节,促进缺血组织的再生和修复。
白细胞介素8受体:存在于多种细胞膜表面,包括内皮细胞、上皮细胞、单核细胞、T淋巴细胞、中性粒细胞和成纤维细胞等多种细胞,当球囊损伤颈动脉后释放大量白细胞介素8,白细胞介素8受体能够与白细胞介素8结合,继而产生一系列生物学反应。

摘要
背景:血管损伤是球囊扩张术后常见的并发症,脐带间充质干细胞的发展为治疗血管损伤提供了新方法。
目的:探讨转染白细胞介素8受体(IL-8RA/B)腺病毒的人脐带间充质干细胞(human umbilical cord mesenchymal stem cells,hUCMSCs)修复损伤血管的机制。
方法:培养原代人脐带间充质干细胞与脐静脉内皮细胞,转染含白细胞介素8重组腺病毒荧光载体。建立大鼠颈动脉损伤模型,将SD大鼠随机分为4组:IL-8RA/B-hUCMSCs组、IL-8RA/B-hUVECs组、Null-hUCMSCs组、对照组,手术后1,3,5 h分别从尾静脉输入0.5×106相应细胞(500 μL),对照组输注同等剂量的生理盐水,30 min后取颈动脉血管,观测绿色荧光蛋白的表达;24 h后采用ELISA测定血清中炎性因子和抗炎因子水平;24 h后采用免疫组化观察中性粒细胞和单核/巨噬细胞的浸润;14 d后伊文思蓝染色观察血管再内皮化及纤维化;28 d后采用苏木精-伊红染色观察血管新内膜增生。
结果与结论:①移植细胞后30 min,观察到损伤血管内膜有绿色荧光蛋白的表达,IL-8RA/B-hUCMSCs组荧光表达量高于其他3组;②移植细胞后24 h,IL-8RA/B-hUCMSCs组血清中炎性因子水平明显低于其他3组,而抗炎因子白细胞介素10水平高于其他3组(P < 0.05),并且IL-8RA/B-hUCMSCs 组炎性细胞浸润明显减少;③移植细胞后14 d,过表达白细胞介素8受体的hUCMSCs促进损伤血管再内皮化,减少血管纤维化;④移植细胞后28 d,IL-8RA/B-hUCMSCs明显减少损伤血管新内膜增生;⑤结果表明,白细胞介素8受体提高hUCMSCs的靶向归巢能力,使hUCMSCs能定向迁移至血管损伤部位,抑制炎症,促进血管再内皮化,减少新内膜增生,促进血管修复。

ORCID:0000-0003-3713-7468(朱兵兵) 

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: 人脐带间充质干细胞, 白细胞介素8受体,  血管损伤,  炎性因子,  血管内皮

Abstract: Abstract
BACKGROUND: Vascular injury is a common complication after balloon dilatation. The development of umbilical cord mesenchymal stem cells (UC-MSCs) provides a new method for treating vascular injury.
OBJECTIVE: To investigate the mechanism underlying the repair of damaged blood vessels by human UC-MSCs (hUC-MSCs) transfected with interleukin-8RA/B (IL-8RA/B) adenovirus. 
METHODS: hUC-MSCs and human umbilical vein endothelial cells (hUVECs) were collected and transfected with adenovirus vectors containing human IL-8RA and/or IL-8RB cDNAs and green fluorescent protein. A rat model of carotid artery injury was established. Sprague-Dawley rats were randomly divided into four groups: IL-8RA/B-hUCMSCs group, Il-8ra/B-hUVECs group, Null-hUCMSCs group, and control group, followed by injection of 0.5×106 corresponding cells 
(500 μL) and same volume of normal saline via the tail vein respectively at 1, 3, and 5 hours post-surgery. After 30 minutes of injection, the carotid artery was taken and the expression of green fluorescent protein was observed. After 24 hours, the serum levels of inflammatory and anti-inflammatory factors were measured by ELISA; and the infiltration of neutrophil cells and mononuclear macrophages was observed by immunohistochemistry. After 14 days, Evans blue staining was used to observe vascular endothelialization and fibrosis. After 28 days, the neointimal hyperplasia was observed by hematoxylin-eosin staining. 
RESULTS AND CONCLUSION: (1) After 30 minutes of IL-8RA/B-hUC-MSCs infusion, the expression of green fluorescent protein was observed in the injured vascular intima, and the fluorescence expression was higher than that of the other three groups. (2) After 24 hours of IL-8RA/B-hUC-MSCs infusion, the expression of inflammatory factors in the serum was significantly lower than that of the other three groups, while the expression of anti-inflammatory factor interleukin-10 was higher than that of the other three groups (P < 0.05). In addition, inflammatory cell infiltration in the IL-8RA/B-hUC-MSCs group decreased significantly. (3) hUC-MSCs overexpressing interleukin-8 receptor promoted re-endothelialization of injured vessels and reduced vascular fibrosis after 14 days of infusion. (4) IL-8RA/B-hUC-MSCs reduced vascular neointimal hyperplasia after 28 days of infusion. (5) Interleukin-8 receptor enhances the targeted homing ability of hUC-MSCs, allowing MSCs to migrate to the site of vascular injury, inhibit inflammation, reduce neointimal hyperplasia, and promote vascular repair.

Key words: human umbilical cord mesenchymal stem cells,  interleukin-8RA/B,  vascular injury,  inflammatory factor,  vascular endothelium

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