<p>Osteoporosis (OP) is a common clinical bone disease that can cause a high incidence of non-stress fractures and is one of the main degenerative diseases that endangers the health and life of middle-aged and older women. The mechanism underlying the abnormal differentiation and function of human bone marrow stem cells (hBMSCs) remains to be elucidated. Cell proliferation and differentiation were determined using 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay, alkaline phosphatase (ALP) staining, and Alizarin Red Staining. The interaction between insulin-like growth factor 2 mRNA–binding protein 2 (IGF2BP2) and ubiquitin-specific protease 7 (USP7) was predicted and validated using bioinformatics approaches, luciferase assays, RNA immunoprecipitation (RIP), and immunoprecipitation (IP). Actinomycin D treatment was used to test the stability of mRNA in the various groups. Methyltransferase-like 14 (METTL14) expression was increased in osteogenic differentiation medium-induced hBSMCs and was associated with enhanced osteogenic differentiation. METTL14 regulated the expression USP7 by modulating its N<sup>6</sup>-methyladenosine (m6A) level. IGF2BP2 exerted an m6A-dependent effect on USP7 mRNA stability and USP7 increased sirtuin 1 (SIRT1) expression in hBMSCs by enhancing SIRT1 deubiquitination. METTL14 stimulated the osteogenic differentiation of hBMSCs through the m6A-IGF2BP2-USP7 pathway and promoted hBMSCs osteogenic development via SIRT1-Bmi1 signaling. METTL14 stimulated the osteogenic differentiation of hBMSCs by stabilizing USP7 mRNA in an m6A-dependent manner. USP7 was also stabilized by IGF2BP2 and it regulated downstream SIRT1-Bmi1 signaling.</p>

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

METTL14 Promotes the Osteogenic Differentiation of Human Bone Marrow Stromal Cells via m6A-Dependent Stabilization of USP7 mRNA

  • Yu Leng,
  • Zhiwen Liu,
  • Jun Min,
  • Qing Ke,
  • Yiqing Shao,
  • Junyan Lai,
  • Jing Zhao

摘要

Osteoporosis (OP) is a common clinical bone disease that can cause a high incidence of non-stress fractures and is one of the main degenerative diseases that endangers the health and life of middle-aged and older women. The mechanism underlying the abnormal differentiation and function of human bone marrow stem cells (hBMSCs) remains to be elucidated. Cell proliferation and differentiation were determined using 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay, alkaline phosphatase (ALP) staining, and Alizarin Red Staining. The interaction between insulin-like growth factor 2 mRNA–binding protein 2 (IGF2BP2) and ubiquitin-specific protease 7 (USP7) was predicted and validated using bioinformatics approaches, luciferase assays, RNA immunoprecipitation (RIP), and immunoprecipitation (IP). Actinomycin D treatment was used to test the stability of mRNA in the various groups. Methyltransferase-like 14 (METTL14) expression was increased in osteogenic differentiation medium-induced hBSMCs and was associated with enhanced osteogenic differentiation. METTL14 regulated the expression USP7 by modulating its N6-methyladenosine (m6A) level. IGF2BP2 exerted an m6A-dependent effect on USP7 mRNA stability and USP7 increased sirtuin 1 (SIRT1) expression in hBMSCs by enhancing SIRT1 deubiquitination. METTL14 stimulated the osteogenic differentiation of hBMSCs through the m6A-IGF2BP2-USP7 pathway and promoted hBMSCs osteogenic development via SIRT1-Bmi1 signaling. METTL14 stimulated the osteogenic differentiation of hBMSCs by stabilizing USP7 mRNA in an m6A-dependent manner. USP7 was also stabilized by IGF2BP2 and it regulated downstream SIRT1-Bmi1 signaling.