中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (31): 4970-4974.doi: 10.12307/2024.712

• 干细胞培养与分化 stem cell culture and differentiation • 上一篇    下一篇

人胎盘间充质干细胞调控 TGF-β1 /Smad3 信号通路抑制肺纤维化的发生

曹佳伟1,丁劭瑞1,铁  华1,薛  菁2,3,贾元元2,3,梁雪云3,李  锋4   

  1. 1宁夏医科大学临床医学院,宁夏回族自治区银川市   750004;2宁夏医学科学研究院,宁夏医科大学总医院,宁夏回族自治区银川市   750004;3宁夏回族自治区干细胞与再生医学重点实验室,宁夏医科大学总医院,宁夏回族自治区银川市   750004;4宁夏医科大学总医院医学实验中心,宁夏回族自治区银川市   750004
  • 收稿日期:2023-08-10 接受日期:2023-10-12 出版日期:2024-11-08 发布日期:2024-01-22
  • 通讯作者: 李锋,硕士,主任技师,宁夏医科大学总医院医学实验中心,宁夏回族自治区银川市 750004
  • 作者简介:曹佳伟,女,1997年生,宁夏回族自治区固原市人,汉族,宁夏医科大学在读硕士,主要从事间质性肺病肺纤维化研究。
  • 基金资助:
    国家自然科学基金项目(81860566),项目负责人:李锋

Human placental mesenchymal stem cells inhibit occurrence of pulmonary fibrosis by regulating transforming growth factor-beta 1/Smad3 signaling pathway

Cao Jiawei1, Ding Shaorui1, Tie Hua1, Xue Jing2, 3, Jia Yuanyuan2, 3, Liang Xueyun3, Li Feng4   

  1. 1Clinical Medical College, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2General Hospital of Ningxia Medical University, Ningxia Academy of Medical Sciences, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 3Key Laboratory of Stem Cell and Regenerative Medicine of Ningxia Hui Autonomous Region, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 4Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Received:2023-08-10 Accepted:2023-10-12 Online:2024-11-08 Published:2024-01-22
  • Contact: Li Feng, Master, Chief technician, Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Cao Jiawei, Master candidate, Clinical Medical College, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:
    National Natural Science Foundation of China, No. 81860566 (to LF)

摘要:


文题释义:

胎盘间充质干细胞:是存在于胎盘组织中的一种多功能细胞,具有自我更新和多向分化能力。因具有免疫调节功能、组织修复作用以及低免疫原性,胎盘间充质干细胞在多种疾病治疗中展现出广阔的应用前景。
肺纤维化:是一种发生在肺间质的慢性进展性疾病,会引起肺组织的免疫炎症反应和肺泡结构损伤,主要病理特征是胶原合成和降解失衡引起细胞外基质在肺间质内过度积累,导致气体交换不良,最终引发呼吸衰竭。


背景:研究表明人胎盘间充质干细胞能有效抑制肺纤维化的发展,但其发挥作用的具体机制目前并不清楚。

目的:探究人胎盘间充质干细胞对二氧化硅诱导人胚肺成纤维细胞发生肺纤维化的治疗作用及相关机制。
方法:CCK-8法检测不同质量浓度二氧化硅干预不同时间对MRC-5细胞增殖活力的影响,结合免疫荧光染色法筛选出最佳的二氧化硅刺激质量浓度与时间用于后续实验。将MRC-5细胞分为空白组、二氧化硅组、二氧化硅+人胎盘间充质干细胞组,空白组细胞不予任何处理,二氧化硅组MRC-5细胞给予100 μg/mL二氧化硅刺激48 h,二氧化硅+人胎盘间充质干细胞组MRC-5细胞先给予100 μg/mL二氧化硅刺激48 h后再与人胎盘间充质干细胞共培养24 h。免疫荧光染色检测各组细胞α-平滑肌肌动蛋白、胶原蛋白Ⅰ型蛋白的表达;Western blot检测各组细胞肺纤维化相关蛋白和TGF-β1/Smad 3信号通路相关蛋白表达。

结果与结论:①CCK-8结果显示,100 μg/mL 二氧化硅刺激MRC-5细胞48 h为最佳质量浓度与时间;②免疫荧光染色结果显示,与二氧化硅组相比,二氧化硅+人胎盘间充质干细胞组α-平滑肌肌动蛋白、胶原蛋白Ⅰ型蛋白表达明显降低;③Western blot结果显示,与二氧化硅组相比,二氧化硅+人胎盘间充质干细胞组α-平滑肌肌动蛋白、胶原蛋白Ⅰ型、N-钙黏蛋白、粘连蛋白、转化生长因子β1、p-Smad3、Smad3的蛋白表达均降低,E-钙黏蛋白表达升高,差异均有显著性意义(P < 0.05);④结果说明,人胎盘间充质干细胞能够对二氧化硅诱导的肺纤维化有显著的治疗作用;人胎盘间充质干细胞可以通过调控 TGF-β1/Smad3信号通路抑制肺纤维化的发生。

https://orcid.org/0009-0000-1631-3456 (曹佳伟);https://orcid.org/0000-0002-7991-8011 (李锋)

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: 人胎盘间充质干细胞, 肺纤维化, MRC-5细胞, 转化生长因子β1, Smad3, 信号通路

Abstract: BACKGROUND: Human placental mesenchymal stem cells have been shown to be effective in inhibiting the development of pulmonary fibrosis, but the underlying mechanisms remain unclear.
OBJECTIVE: To investigate the therapeutic effect and related mechanism of human placental mesenchymal stem cells on silica-induced pulmonary fibrosis in human embryonic lung fibroblasts (MRC-5).
METHODS: CCK-8 assay was used to detect the effects of different mass concentrations of silica on the proliferation of MRC-5 at different time points. Immunofluorescence staining was used to screen out the best stimulating mass concentration and time of silica for subsequent experiments. MRC-5 cells were divided into blank group, silica group, and silica + human placental mesenchymal stem cell group. In the blank group, cells were not treated. In the silica group, MRC-5 cells were stimulated with 100 μg/mL silica for 48 hours. In the silica + human placental mesenchymal stem cell group, MRC-5 cells were stimulated with 100 μg/mL silica for 48 hours and then co-cultured with human placental mesenchymal stem cells for 24 hours. Immunofluorescence staining was used to detect the expression of α-smooth muscle actin and collagen type I in cells of each group. Western blot assay was used to detect the expressions of pulmonary fibrosis-related proteins and TGF-β1/Smad 3 signaling pathway-related proteins in cells of each group.
RESULTS AND CONCLUSION: (1) CCK-8 assay results suggested that 100 μg/mL silica was the best mass concentration and time to stimulate MRC-5 cells for 48 hours. (2) Immunofluorescence staining results showed that the expression of α-smooth muscle actin and collagen type I in the silica + human placental mesenchymal stem cell group was significantly lower than that in the silica group. (3) Western blot assay results showed that compared with the silica group, the protein expression levels of α-smooth muscle actin, collagen type I, N-cadherin, fibronectin, transforming growth factor-β1, p-Smad3, and Smad3 in the silica + human placental mesenchymal stem cell group were decreased, and the expression of E-cadherin was increased. The difference was statistically significant (P < 0.05). (4) The results showed that human placental mesenchymal stem cells had a significant therapeutic effect on silica-induced pulmonary fibrosis. Human placental mesenchymal stem cells can inhibit the development of pulmonary fibrosis by regulating transforming growth factor-β1/Smad3 signaling pathway.

Key words: human placental mesenchymal stem cell, pulmonary fibrosis, MRC-5 cell, transforming growth factor-β1, Smad3, signaling pathway

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