中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (5): 697-702.doi: 10.3969/j.issn.2095-4344.1584

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

炎症激活骨髓间充质干细胞条件培养基对辐射损伤IEC-6细胞的修复

李金亮1,2,骆昱均2,马发鑫2,郑 跃2,卢 铨2,周伟杰2,张 宸2,沙卫红1,2, 陈 浩2   

  1. 1南方医科大学第二临床医学院,广东省广州市 510000;2广东省人民医院消化内科(广东省医学科学院),广东省广州市 510000
  • 修回日期:2018-11-19 出版日期:2019-02-18 发布日期:2019-02-18
  • 通讯作者: 沙卫红,主任医师,南方医科大学第二临床医学院,广东省广州市 510000;广东省人民医院消化内科(广东省医学科学院),广东省广州市 510000; 并列通讯作者:陈浩,博士,医师,广东省人民医院消化内科(广东省医学科学院),广东省广州市510000
  • 作者简介:李金亮,男,1992年生,广东省台山市人,汉族,2016年广州医科大学毕业,硕士,医师,主要从事胃肠病的诊治,组织损伤修复、干细胞的基础及临床研究。 并列第一作者:骆昱均,广东省人民医院消化内科(广东省医学科学院),广东省广州市 510000
  • 基金资助:

    国家自然科学基金(81741067),项目负责人:陈浩;广东省自然科学基金(2016A030313815),项目负责人:沙卫红;广州市科技计划项目(201707010419),项目负责人:沙卫红;广州市科技计划项目(201804010050),项目负责人:陈浩

Bone marrow mesenchymal stem cell conditioned medium with inflammatory activation for repair of radiation-induced IEC-6 cell injury

Li Jinliang1, 2, Luo Yujun2, Ma Faxin2, Zheng Yue2, Lu Quan2, Zhou Weijie2, Zhang Chen2, Sha Weihong1, 2, Chen Hao2   

  1. 1Second Clinical Medical College of Southern Medical University, Guangzhou 510000, Guangdong Province, China; 2Department of Digestion, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510000, Guangdong Province, China
  • Revised:2018-11-19 Online:2019-02-18 Published:2019-02-18
  • Contact: Sha Weihong, Chief physician, Second Clinical Medical College of Southern Medical University, Guangzhou 510000, Guangdong Province, China; Department of Digestion, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510000, Guangdong Province, China; Chen Hao, MD, Physician, Department of Digestion, Guangdong General Hospita (Guangdong Academy of Medical Sciences), Guangzhou 510000, Guangdong Province, China
  • About author:Li Jinliang, Master, Physician, Second Clinical Medical College of Southern Medical University, Guangzhou 510000, Guangdong Province, China; Department of Digestion, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510000, Guangdong Province, China. Luo Yujun, Department of Digestion, Guangdong General Hospital (Guangdong Academy of Medical Sciences), Guangzhou 510000, Guangdong Province, China. Li Jinliang and Luo Yujun contributed to this work.
  • Supported by:

    the National Natural Science Foundation of China, No. 81741067 (to CH); the Natural Science Foundation of Guangdong Province, No. 2016A030313815 (to SWH); Guangzhou Municipal Science and Technology Plan, No. 201707010419 (to SWH) and 201804010050 (to CH)

摘要:

文章快速阅读:

文题释义:
IEC-6细胞:
来自乳鼠小肠上皮隐窝细胞,体外培养时生长迅速、稳定传代,具有未分化的隐窝上皮细胞的特征,多用于小肠上皮细胞在各种因素作用下的肠黏膜功能变化的研究,是检测肠黏膜再生修复和凋亡反应常用的体外模型。
放射性肠损伤:是腹盆腔恶性肿瘤放射治疗引起的常见并发症,小肠上皮细胞对放射线高度敏感,射线导致小肠隐窝细胞被破坏,绒毛缩短,上皮细胞脱落,炎症细胞浸润,导致肠黏膜功能破坏,从而出现呕吐、腹泻、细菌感染等症状。

 

摘要
背景:
间充质干细胞条件培养基是干细胞移植理想的替代方案,课题组前期研究表明炎症预激活的间充质干细胞条件培养基能促进辐射损伤小肠组织学结构和功能的修复,改善急性辐射损伤大鼠生存状态,但其潜在的细胞机制未进一步探讨。
目的:观察炎症预激活的间充质干细胞条件培养基对辐射损伤小肠上皮细胞增殖、凋亡的影响,探讨预激活间充质干细胞条件培养基修复小肠黏膜的细胞机制。  
方法:小肠隐窝IEC-6细胞分为对照组、辐射损伤组、辐射损伤+MSC-CMIEC-6(NOR)组和辐射损伤+ MSC-CMIEC-6(IR)组,后3组以10 Gy X射线一次性照射IEC-6细胞建立体外急性小肠辐射损伤模型,对照组及辐射损伤组加入DMEM-F12培养基,辐射损伤+MSC-CMIEC-6(NOR)组加入正常状态间充质干细胞条件培养基,辐射损伤+MSC-CMIEC-6(IR)组加入炎症激活状态间充质干细胞条件培养基。照射后3 d收集细胞行免疫荧光PCNA染色观察增殖改变,行TUNEL凋亡染色及Western blot蛋白免疫印迹法观察凋亡改变。
结果与结论:与辐射损伤组相比,辐射损伤+MSC-CMIEC-6(IR)组IEC-6细胞PCNA阳性细胞数明显增加(P < 0.05),TUNEL阳性细胞数下降(P < 0.05),凋亡相关因子Caspases-3蛋白表达明显下降(P < 0.05),而辐射损伤+MSC-CMIEC-6(NOR)组的各项指标变化无统计学意义(P > 0.05)。上述结果表明,与正常状态的间充质干细胞条件培养基相比,炎症激活的间充质干细胞条件培养基显著促进辐射损伤肠上皮细胞的增殖,并抑制其凋亡,促进辐射损伤小肠上皮修复。


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
ORCID:
0000-0002-2700-6539(李金亮)

关键词: 间充质干细胞条件培养基, 骨髓间充质干细胞, 炎症, 条件培养基, 小肠上皮细胞, 放射性肠损伤, 增殖, 凋亡, 修复, 国家自然科学基金

Abstract:

BACKGROUND: Conditioned medium from mesenchymal stem cells (MSC-CM) may represent a promising alternative to MSCs transplantation. Our previous study has demonstrated that MSC-CM with inflammatory activation improves the structural and functional restoration of the small intestine after radiation-induced intestinal injury, improve the survival status of rats with acute radiation injury, but its potential cellular mechanism has not been further explored.
OBJECTIVE: To observe the effect of MSC-CM with inflammatory activation on the proliferation and apoptosis of intestinal epithelial cells (IEC-6) after radiation injury and to investigate the cellular mechanism of pre-activated MSC-CM in repairing the small intestinal mucosa.
METHODS: IEC-6 cells were divided into four groups: control group, radiation injury group, normal MSC-CM (MSC-CMIEC-6(NOR)) group and inflammatory pre-activated MSC-CM (MSC-CMIEC-6(IR)) group. IEC-6 cells in the latter three groups were exposed to 10 Gy X-ray irradiation and cultured in DMEM-F12 medium, MSC-CMIEC-6(IR) and MSC-CMIEC-6(NOR) respectively. Cells in the control group were only cultured in DMEM-12 medium. Cultured cells were collected at 3 days after radiation to observe the proliferation of IEC-6 cells by using proliferating cell nuclear antigen immunofluorescence staining, and to observe the apoptosis by using TUNEL apoptosis staining and western blot assay. 
RESULTS AND CONCLUSION: Compared with the radiation injury group, in the MSC-CMIEC-6(IR) group, the number of cells positive for proliferating cell nuclear antigen increased significantly (P < 0. 05), the number of TUNEL positive cells decreased significantly (P < 0. 05), and the expression of Caspases-3 decreased significantly (P < 0.05), However, there was no significant difference between the MSC-CMIEC-6(NOR) group and radiation injury group (P > 0.05). Taken together, MSC-CMIEC-6(IR), but not non-activated MSC-CM, significantly promotes the proliferation and reduces apoptosis of intestinal epithelial cells after radiation injury and therefore repair the injured intestinal tissue.


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

Key words: Mesenchymal Stem Cells, Culture Media, Conditioned, Intestine, Small, Radiation Injuries, Tissue Engineering

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