中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (8): 1168-1173.doi: 10.12307/2024.202

• 皮肤粘膜组织构建 skin and mucosal tissue construction • 上一篇    下一篇

铁死亡诱导剂RAS合成致死分子3抑制病理性瘢痕成纤维细胞的纤维化

沈江涌1,贺  茜1,2,唐玉婷1,2,王建军1,2,刘金毅1,2,陈园园1,2,王昕艺1,2,刘  彤1,2,孙浩原1,2   

  1. 1宁夏医科大学总医院烧伤整形美容科,宁夏回族自治区银川市  750004;2宁夏医科大学,临床医学院,宁夏回族自治区银川市  750004
  • 收稿日期:2022-12-20 接受日期:2023-02-08 出版日期:2024-03-18 发布日期:2023-07-18
  • 通讯作者: 沈江涌,博士,副教授,主任医师,宁夏医科大学总医院烧伤整形美容科,宁夏回族自治区银川市 750004
  • 作者简介:沈江涌,男,1976年生,宁夏回族自治区银川市人,汉族,博士,副教授,主任医师,主要从事病理性瘢痕形成的机制研究。 贺茜,女,1995年生,湖南省湘潭市人,汉族,宁夏医科大学在读硕士,主要从事病理性瘢痕形成的机制研究。
  • 基金资助:
    国家自然科学基金(81860555),项目负责人:沈江涌;宁夏高等学校一流学科建设(宁夏医科大学国内一流建设学科临床医学)资助项目(NXYLXK2017A05),项目负责人:沈江涌

RAS-selective lethal small molecule 3 inhibits the fibrosis of pathological scar fibroblasts

Shen Jiangyong1, He Xi1, 2, Tang Yuting1, 2, Wang Jianjun1, 2, Liu Jinyi1, 2, Chen Yuanyuan1, 2, Wang Xinyi1, 2, Liu Tong1, 2, Sun Haoyuan1, 2   

  1. 1Department of Burn and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; 2School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Received:2022-12-20 Accepted:2023-02-08 Online:2024-03-18 Published:2023-07-18
  • Contact: Shen Jiangyong, Department of Burn and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Shen Jiangyong, MD, Associate professor, Chief physician, Department of Burn and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China He Xi, Master candidate, Department of Burn and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China; School of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:
    National Natural Science Foundation of China, No. 81860555 (to SJY); First-class Discipline Construction Project in Ningxia Colleges and Universities (Construction of Domestic First-Class Discipline Clinical Medicine in Ningxia Medical University), No. NXYLXK2017A05 (to SJY)

摘要:


文题释义:

铁死亡诱导剂RAS合成致死分子3:可以结合并使谷胱甘肽过氧化物酶4失活,介导谷胱甘肽过氧化物酶4所调节的铁死亡。
谷胱甘肽过氧化物酶4:其可以作为判断铁死亡的重要指标之一。


背景:病理性瘢痕主要表现为异常的细胞外基质积累和过度的成纤维细胞增殖,成纤维细胞过度增殖就会产生大量以胶原纤维为主的细胞外基质。因此深入探讨成纤维细胞纤维化在病理性瘢痕形成中的作用,将为揭示病理性瘢痕的机制和生物学治疗提供新思路。

目的:探讨铁死亡诱导剂RAS合成致死分子3(RAS-selective lethal small molecule 3,RSL3)对人病理性瘢痕成纤维细胞纤维化的影响。 
方法:收集10例宁夏医科大学总医院烧伤整形美容科提供的病理性瘢痕组织和同一个体正常皮肤组织,提取人病理性瘢痕成纤维细胞和人正常皮肤成纤维细胞用于后续实验;苏木精-伊红染色观察病理性瘢痕组织和正常皮肤组织的形态;倒置显微镜观察病理性瘢痕成纤维细胞和正常皮肤成纤维细胞的外观形态;免疫荧光实验验证所提取的细胞是否为成纤维细胞;用不同浓度的RSL3(1,3,5,7,9,11,13 μmol/L)干预细胞,CCK-8法检测RSL3作用于成纤维细胞的半数抑制浓度(IC50);设置对照组(不做处理)和RSL3干预组(用7 μmol/L的RSL3干预细胞24 h),qRT-PCR和Western blot检测谷胱甘肽过氧化物酶4、Ⅰ型胶原蛋白、Ⅲ型胶原蛋白和α-平滑肌肌动蛋白的mRNA和蛋白的表达;检测细胞丙二醛浓度;划痕试验检测细胞划痕后24 h剩余划痕面积,并计算剩余划痕面积百分比。 

结果与结论:①与正常皮肤组相比,病理性瘢痕组的谷胱甘肽过氧化物酶4高表达(mRNA:t=3.252,P < 0.01;蛋白:t=5.075,P < 0.01);②与正常皮肤成纤维细胞组相比,病理性瘢痕成纤维细胞组的谷胱甘肽过氧化物酶4高表达(mRNA:t=10.32,P < 0.01;蛋白:t=26.22,P < 0.01);③与对照组相比,RSL3干预组谷胱甘肽过氧化物酶4表达减少(mRNA:t=2.798,P < 0.05;蛋白:t=4.643,P < 0.01),丙二醛浓度上升(t=2.917,P < 0.05),Ⅰ型胶原蛋白(mRNA:t=15.84,P < 0.01;蛋白:t=4.610,P < 0.01)、Ⅲ型胶原蛋白(mRNA:t=28.86,P < 0.01;蛋白:t=7.713,P < 0.01)和α-平滑肌肌动蛋白(mRNA:t=2.671,P < 0.05;蛋白:t=7.417,P < 0.01)的表达减少,迁移能力减弱(t=14.06,P < 0.01);④提示RSL3通过抑制谷胱甘肽过氧化物酶4的表达,进而抑制病理性瘢痕成纤维细胞的纤维化和迁移能力。

https://orcid.org/0000-0002-2214-5898(沈江涌);https://orcid.org/0000-0001-7859-0221(贺茜)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 病理性瘢痕, 成纤维细胞, RSL3, 谷胱甘肽过氧化物酶4, α-平滑肌肌动蛋白, Ⅰ型胶原蛋白, Ⅲ型胶原蛋白, 铁死亡, 纤维化

Abstract: BACKGROUND: Abnormal extracellular matrix accumulation and excessive proliferation of fibroblasts are the main manifestations of pathological scars. Excessive proliferation of fibroblasts leads to the production of large amounts of collagen-based extracellular matrix. Therefore, to investigate the role of fibroblast fibrosis in the formation of pathological scar will provide a new idea for revealing the mechanism of pathological scar and biological therapy. 
OBJECTIVE: To investigate the effect of RAS-selective lethal small molecule 3 (RSL3) on the fibrosis of human pathological scar fibroblasts. 
METHODS: Then cases of pathological scar tissue and normal skin tissue samples from the same individuals, provided by the Department of Burn Plastic Surgery, General Hospital of Ningxia Medical University, were collected. Fibroblasts of human pathological scar and human normal skin were extracted and used in the following experiments. The general condition of the pathological scar tissue and the normal skin tissue was detected by hematoxylin-eosin staining. The appearance of fibroblasts from pathological scar and normal skin were observed by inverted microscope. The fibroblasts were verified by immunofluorescence assay. The cells were treated with different concentrations of RSL3 (1, 3, 5, 7, 9, 11, 13 μmol/L). The inhibitory concentration of RSL3 on fibroblasts was detected by cell counting kit-8. Control group (without treatment) and RSL3 intervention group (treated with 7 μmol/L RSL3 for 24 hours) were set up. The mRNA and protein expressions of glutathione peroxidase 4, type I collagen, type III collagen and α-smooth muscle actin were detected by qRT-PCR and western blot, respectively. Level of malondialdehyde in cells was detected. The residual scratch area was measured by cell scratch test after 24 hours to calculate the percentage of residual scratch area.
RESULTS AND CONCLUSION: The expression of glutathione peroxidase 4 in the pathological scar group was higher than that in the normal skin group (mRNA: t=3.252, P < 0.01; protein: t=5.075, P < 0.01). The expression of glutathione peroxidase 4 in the pathological scar fibroblast group was higher than that in the normal skin fibroblast group (mRNA: t=10.32, P < 0.01; protein: t=26.22, P < 0.01). Compared with the control group, the expression of glutathione peroxidase 4 was decreased (mRNA: t=2.798, P < 0.05; protein: t=4.643, P < 0.01), the content of malondialdehyde was increased (t=2.917, P < 0.05), the expression of type I collagen (mRNA: t=15.84, P < 0.01; protein: t=4.610, P < 0.01), type III collagen (mRNA: t=28.86, P < 0.01; protein: t=7.713, P < 0.01) and α-smooth muscle actin (mRNA: t=2.671, P < 0.05; protein: t=7.417, P < 0.01) were decreased in the RSL3 intervention group. Compared with the control group, the migration ability was weakened in the RSL3 intervention group (t=14.06, P < 0.01). To conclude, RSL3 can inhibit the expression of glutathione peroxidase 4 and then inhibit the ability of fibrosis and migration of pathological scar fibroblasts. 

Key words: pathological scar, fibroblast, RSL3, glutathione peroxidase 4, α-smooth muscle actin, type I collagen, type III collagen, ferroptosis, fibrosis 

中图分类号: