天津医药 ›› 2024, Vol. 52 ›› Issue (2): 124-128.doi: 10.11958/20230659

• 细胞与分子生物学 • 上一篇    下一篇

miR-10b靶向TGFBR1/SMAD3通路对特发性矮小症的软骨细胞增殖、肥大的影响机制

胡娜(), 李正宇, 叶春风, 吴英, 姚庆, 黄世祥, 李文, 朱海琴△()   

  1. 南昌大学第二附属医院儿科(邮编330038)
  • 收稿日期:2023-04-30 修回日期:2023-09-05 出版日期:2024-02-15 发布日期:2024-01-26
  • 通讯作者: △ E-mail:904668463@qq.com
  • 作者简介:胡娜(1982),女,主治医师,主要从事儿童生长发育方面研究。E-mail:hunajx@163.com
  • 基金资助:
    江西省卫生健康委科技计划项目(20204274)

The mechanism of miR-10b targeting TGFBR1/SMAD3 pathway on chondrocyte proliferation and hypertrophy in idiopathic short stature

HU Na(), LI Zhengyu, YE Chunfeng, WU Ying, YAO Qing, HUANG Shixiang, LI Wen, ZHU Haiqin△()   

  1. Department of Pediatrics, the Second Affiliated Hospital of Nanchang University, Nanchang 330038, China
  • Received:2023-04-30 Revised:2023-09-05 Published:2024-02-15 Online:2024-01-26
  • Contact: △ E-mail:904668463@qq.com

摘要:

目的 研究miR-10b对特发性矮小症(ISS)的影响及作用机制。方法 收集ISS患儿(ISS组)和体检健康儿童(健康对照组)各54例,qPCR检验血清miR-10b表达量,分析ISS组患儿血清miR-10b表达与患儿临床资料的关系。采用miR-10b inhibitor、si-TGFBR1及各自阴性对照转染C28/I2细胞,利用CCK-8实验检测C28/I2细胞增殖能力,Western blot检测侏儒相关转录因子2(RUNX2)、X型胶原α1链(COL10A1)、转化生长因子β受体1(TGFBR1)、SMAD3、pSMAD3蛋白表达量。在StarBase数据库筛选miR-10b靶点,利用双萤光素酶报告基因实验验证miR-10b与TGFBR1的靶向关系。结果 ISS组血清miR-10b表达量高于健康对照组,且miR-10b表达越高,患儿的身高、IGF-1、骨特异性碱性磷酸酶的下降越明显(P<0.05)。与NC组相比,miR-10b inhibitor组细胞增殖能力升高,RUNX2、COL10A1、TGFBR1、pSMAD3蛋白表达上调(P<0.05);StarBase数据库提示miR-10b存在TGFBR1的结合位点,双萤光素酶报告基因实验证实两者结合。与si-NC相比,si-TGFBR1组TGFBR1表达量下调,细胞增殖能力下降(P<0.05)。结论 miR-10b通过靶向TGFBR1/SMAD3通路在特发性矮小症中抑制软骨细胞的增殖、肥大。

关键词: 特发性矮小症, 受体, 转化生长因子βⅠ型, miR-10b, Smad3蛋白质

Abstract:

Objective To investigate the effect and mechanism of microRNA-10b (miR-10b) on idiopathic short stature (ISS). Methods A total of 54 children with ISS and 54 healthy children were collected. The serum expression of miR-10b was detected by RT-qPCR, and the relationship between serum miR-10b expression and clinical data of children with ISS was analyzed. miR-10b inhibitor, si-TGFBR1 and their negative control transfection C28/I2 cells were used. CCK-8 experimental detection was used to detect C28/I2 cell proliferation. Western blot assay was used to detect gnome related transcription factor 2 (RUNX2), collagen type X alpha 1 chain (COL10A1), transforming growth factor beta receptor 1 (TGFBR1), SMAD3 and pSMAD3 protein expression. The target of miR-10b was screened in StarBase database, and the targeting relationship between miR-10b and TGFBR1 was verified by dual luciferase reporter gene assay. Results The serum expression of miR-10b was higher in the ISS group than that of the healthy control group, and the higher the miR-10b expression, the more obvious the decrease of child height, IGF-1 and alkaline phosphatase (P<0.05). Compared with the NC group, the cell proliferation ability and RUNX2, COL10A1, TGFBR1, and pSMAD3 protein expression were up-regulated in the miR-10b inhibitor group (P<0.05). StarBase database suggested that miR-10b had a binding site of TGFBR1, and dual luciferase reporter gene assay confirmed that TGFBR1 interacted with miR-10b (P<0.05). Compared with the si-NC group, the expression of TGFBR1 was down-regulated and the cell proliferation ability was decreased in the si-TGFBR1 group (P<0.05). Conclusion miR-10b inhibits chondrocyte proliferation and hypertrophy in idiopathic short stature by targeting TGFBR1/SMAD3 pathway.

Key words: idiopathic short stature, receptor, transforming growth factor-beta type Ⅰ, miR-10b, Smad3 protein

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