中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (25): 4048-4053.doi: 10.12307/2024.174

• 干细胞因子及调控因子 stem cell factors and regulatory factors • 上一篇    下一篇

miR-146a-3p抑制胰岛素样生长因子1表达调控星形胶质细胞增殖、迁移和凋亡

叶嘉鹏1,王建伟2,吴  毛2,李绍烁2,汪国澎1,王浩阗1,唐  志1,邵  阳2   

  1. 1南京中医药大学,江苏省南京市   210023;2无锡市中医医院,江苏省无锡市   214071
  • 收稿日期:2023-05-12 接受日期:2023-06-25 出版日期:2024-09-08 发布日期:2023-11-24
  • 通讯作者: 邵阳,博士,副主任中医师,无锡市中医医院,江苏省无锡市 214071
  • 作者简介:叶嘉鹏,男,1993年生,江苏省常州市人,汉族,南京中医药大学中医骨伤科学在读博士,主要从事中医药治疗脊髓损伤的研究。
  • 基金资助:
    江苏省中医药科技发展计划项目(YB2020042),项目负责人:邵阳;无锡市科学技术局医疗卫生指导性项目(SKJJZD19),项目负责人:邵阳;无锡市卫生健康委科研项目(Q201945),项目负责人:邵阳;江苏省研究生科研与实践创新计划项目(KYCX22_2061),项目负责人:叶嘉鹏

miR-146a-3p regulates astrocyte proliferation, migration and apoptosis by inhibiting insulin-like growth factor 1 expression

Ye Jiapeng1, Wang Jianwei2, Wu Mao2, Li Shaoshuo2, Wang Guopeng1, Wang Haotian1, Tang Zhi1, Shao Yang2   

  1. 1Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; 2Wuxi Traditional Chinese Medicine Hospital, Wuxi 214071, Jiangsu Province, China
  • Received:2023-05-12 Accepted:2023-06-25 Online:2024-09-08 Published:2023-11-24
  • Contact: Shao Yang, MD, Associate chief physician, Wuxi Traditional Chinese Medicine Hospital, Wuxi 214071, Jiangsu Province, China
  • About author:Ye Jiapeng, Doctoral candidate, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
  • Supported by:
    Jiangsu Province Traditional Chinese Medicine Science and Technology Development Project, No. YB2020042 (to SY); Wuxi Science and Technology Bureau Medical and Health Guidance Project, No. SKJJZD19 (to SY); Scientific Research Project of Wuxi Health Commission, No. Q201945 (to SY); Jiangsu Graduate Research and Practice Innovation Program, No. KYCX22_2061 (to YJP)

摘要:


文题释义:

反应性星形胶质细胞:是由星形胶质细胞通过特定信号调节活化而来,分为2种亚型,一种为神经毒性反应型A1,另一种为神经保护性反应型A2。
胰岛素样生长因子1:也被称作促生长因子,是一种在分子结构上与胰岛素类似的多肽蛋白物质,发挥促进细胞生长和抑制凋亡等作用。


背景:miR-146a-3p水平改变是大多数神经系统疾病发病机制中的常见事件,miR-146a-3p调节星形胶质细胞的具体机制尚未被研究。

目的:验证miR-146a-3p通过胰岛素样生长因子1调控星形胶质细胞的增殖、迁移和凋亡。
方法:将12只SD大鼠随机分为假手术组和脊髓损伤组,每组6只。术后2周对大鼠脊髓组织进行了RNA-Seq测序分析,筛选出差异基因(log2FC > 2),同时挑选出Genecards数据库中脊髓损伤相关基因(Score > 20),再通过Targetscan预测miR-146a-3p的靶基因,取这3个基因集交集,筛选出胰岛素样生长因子1为其中一个重要的目的基因。qPCR、Western blot和免疫组化分析脊髓组织中胰岛素样生长因子1的表达水平。将原代星形胶质细胞分为NC组、NC-mimics组和miR-146a-3p mimics组,用Annexin-V/PI染色法检测细胞凋亡情况、CCK-8法检测细胞增殖情况、Transwell法检测细胞的迁移能力。

结果与结论:脊髓损伤组大鼠脊髓组织中miR-146a-3p的表达较假手术组下降(P < 0.05),胰岛素样生长因子1的表达较假手术组上升(P < 0.05)。与NC组和NC-mimics组比较,miR-146a-3p mimics组星形胶质细胞凋亡率增加(P < 0.01),增殖能力下降(P < 0.01),迁移数量减少(P < 0.01)。结果表明,脊髓损伤后脊髓组织中miR-146a-3p表达量下降,胰岛素样生长因子1表达量上升;在星形胶质细胞中miR-146a-3p靶向调节胰岛素样生长因子1抑制星形胶质细胞的增殖和迁移,促进其凋亡。

https://orcid.org/0000-0003-0639-5827 (叶嘉鹏) 

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: 脊髓损伤, miR-146a-3p, 胰岛素样生长因子1, 星形胶质细胞, 胶质瘢痕

Abstract: BACKGROUND: The alteration of miR-146a-3p level is a common event in the pathogenesis of most neurological diseases, and the specific mechanism of miR-146a-3p regulation of astrocytes has not been studied.
OBJECTIVE: To verify that miR-146a-3p regulates astrocyte proliferation, migration and apoptosis through insulin-like growth factor 1.
METHODS: 12 SD rats were divided into a sham operation group and a spinal cord injury group, with six rats in each group. RNA sequencing analysis was performed on the spinal cord tissues of all groups 2 weeks after surgery to screen out the differential genes (log2FC > 2), and to select spinal cord injury-related genes (Score > 20) in the Genecards database, and then to predict the target genes of miR-146a-3p by Targetscan. The intersection of three gene sets was obtained to screen out insulin-like growth factor 1 as one of the important target genes. qPCR, western blot assay and immunohistochemistry were performed to analyze the expression level of insulin-like growth factor 1 in spinal cord tissues. The primary astrocytes were divided into NC group, NC-mimics group and miR-146a-3p mimics group. Annexin-V/PI staining was used to detect cell apoptosis. CCK-8 assay was used to detect cell proliferation. Transwell assay was used to detect cell migration ability. 
RESULTS AND CONCLUSION: The expression of miR-146a-3p in the spinal cord tissue of the spinal cord injury group was lower than that of the sham operation group (P < 0.05). The expression of insulin-like growth factor 1 in the spinal cord tissue of the spinal cord injury group was higher than that of the sham operation group (P < 0.05). Compared with the NC group and NC-mimics group, the apoptotic rate of astrocytes was increased (P < 0.01); the proliferation of astrocytes was decreased (P < 0.01) and the number of migration was decreased (P < 0.01) in the miR-146a-3p mimics group. To conclude, the expression of miR-146a-3p decreased and the expression of insulin-like growth factor 1 increased in spinal cord tissue after spinal cord injury. miR -146a-3p targeted regulation of insulin-like growth factor 1 in astrocytes, inhibited the proliferation and migration of astrocytes and promoted their apoptosis. 

Key words: spinal cord injury, miR-146a-3p, insulin-like growth factor 1, astrocyte, glial scar

中图分类号: