BMP9 induces osteogenic differentiation through up-regulating LGR4 via the mTORC1/ Stat3 pathway in mesenchymal stem cells

作者全名：Zhang, Jie; Jiang, Jinhai; Liu, Hang; Wang, Shiyu; Ke, Kaixin; Liu, Siyuan; Jiang, Yue; Liu, Lu; Gao, Xiang; He, Baicheng; Su, Yuxi

作者地址：[Zhang, Jie; Jiang, Jinhai; Wang, Shiyu; Ke, Kaixin; Jiang, Yue; Liu, Lu; He, Baicheng] Chongqing Med Univ, Sch Pharm, Dept Pharmacol, Chongqing 400016, Peoples R China; [Zhang, Jie; Jiang, Jinhai; Liu, Hang; Wang, Shiyu; Ke, Kaixin; Liu, Siyuan; Jiang, Yue; Liu, Lu; Gao, Xiang; He, Baicheng] Chongqing Med Univ, Key Lab Biochem & Mol Pharmacol Chongqing, Chongqing 400016, Peoples R China; [Liu, Hang; Liu, Siyuan; Gao, Xiang] Chongqing Med Univ, Affiliated Hosp 2, Dept Orthoped, Chongqing 400016, Peoples R China; [Su, Yuxi] Chongqing Med Univ, Childrens Hosp, Orthoped Dept, Chongqing 400014, Peoples R China; [Su, Yuxi] Chongqing Med Univ, Affiliated Childrens Hosp, Jiangxi Hosp, China Int Sci & Technol Cooperat Base Child Dev &, Chongqing 330000, Jiangxi, Peoples R China; [Su, Yuxi] Natl Clin Res Ctr Child Hlth & Disorders, Chongqing, Peoples R China; [Su, Yuxi] Chongqing Med Univ, Childrens Hosp, Dept Orthoped, 136 Zhongshan 2 Rd, Chongqing 400014, Peoples R China

通信作者：Su, YX (通讯作者)，Chongqing Med Univ, Childrens Hosp, Dept Orthoped, 136 Zhongshan 2 Rd, Chongqing 400014, Peoples R China.

来源：GENES & DISEASES

ESI学科分类：MOLECULAR BIOLOGY & GENETICS

WOS号：WOS:001225701400001

JCR分区：Q1

影响因子：6.9

年份：2024

卷号：11

期号：3

开始页：　

结束页：　

文献类型：Article

关键词：BMP9; LGR4; mTORC1; Osteogenic differentiation; Stat3

摘要：Bone defects and non-union are prevalent in clinical orthopedy, and the outcomes of current treatments are often suboptimal. Bone tissue engineering offers a promising approach to treating these conditions effectively. Bone morphogenetic protein 9 (BMP9) can commit mesenchymal stem cells to osteogenic lineage, and a knowledge of the underlying mechanisms may help advance the field of bone tissue engineering. Leucine-rich repeats containing G protein-coupled receptor 4 (LGR4), a member of G protein-coupled receptors, is essential for modulating bone development. This study is aimed at investigating the impact of LGR4 on BMP9-induced osteogenesis in mesenchymal stem cells as well as the underlying mechanisms. Bone marrow stromal cells from BMP9-knockout mice exhibited diminished LGR4 expression, and exogenous LGR4 clearly restored the impaired osteogenic potency of the bone marrow stromal cells. Furthermore, LGR4 expression was increased by BMP9 in C3H10T1/2 cells. LGR4 augmented the benefits of BMP9-induced osteogenic markers and bone formation, whereas LGR4 inhibition restricted these effects. Meanwhile, the BMP9-induced lipogenic markers were increased by LGR4 inhibition. The protein levels of Raptor and p-Stat3 were elevated by BMP9. Raptor knockdown or p-Stat3 suppression attenuated the osteoblastic markers and LGR4 expression brought on by BMP9. LGR4 significantly reversed the blocking effect of Raptor knockdown or p-Stat3 suppression on the BMP9-induced osteoblastic markers. Raptor interacts with p-Stat3, and p-Stat3 activates the LGR4 promoter activity. In conclusion, LGR4 boosts BMP9 osteoblastic potency in mesenchymal stem cells, and BMP9 may up-regulate LGR4 via the mTORC1/Stat3 signal activation. (c) 2023 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY license (http://creativecommons.org/ licenses/by/4.0/).

基金机构：Chongqing Science and Tech- nology Commission project (China) [cstc2018jcy- jAX0143]; CQMU Program for Youth Innovation in Future Medicine (China) [W0154]

基金资助正文：This work was supported by Chongqing Science and Tech- nology Commission project (China) (No. cstc2018jcy- jAX0143 to Yuxi Su) and CQMU Program for Youth Innovation in Future Medicine (China) (No. W0154 to Baicheng He) .