LCN2 Inhibits the BMP9-induced Osteogenic Differentiation through Reducing Wnt/beta-catenin Signaling via Interacting with LRP6 in Mouse Embryonic Fibroblasts

作者全名："Jiang, Jin-Hai; Wang, Shi-Yu; Zhang, Jie; Liu, Hang; Ke, Kai-Xin; Jiang, Yue; Liu, Lu; Liu, Si-Yuan; Gao, Xiang; He, Bai-Cheng"

作者地址："[Jiang, Jin-Hai; Wang, Shi-Yu; Zhang, Jie; Ke, Kai-Xin; Jiang, Yue; Liu, Lu; He, Bai-Cheng] Chongqing Med Univ, Sch Pharm, Dept Pharmacol, Chongqing 400016, Peoples R China; [Jiang, Jin-Hai; Wang, Shi-Yu; Zhang, Jie; Liu, Hang; Ke, Kai-Xin; Jiang, Yue; Liu, Lu; Liu, Si-Yuan; Gao, Xiang; He, Bai-Cheng] Chongqing Med Univ, Key Lab Biochem & Mol Pharmacol Chongqing, Chongqing 400016, Peoples R China; [Liu, Hang; Liu, Si-Yuan; Gao, Xiang] Chongqing Med Univ, Dept Orthoped, Affiliated Hosp 2, Chongqing 400016, Peoples R China"

通信作者："He, BC (通讯作者)，Chongqing Med Univ, Sch Pharm, Dept Pharmacol, Chongqing 400016, Peoples R China.; He, BC (通讯作者)，Chongqing Med Univ, Key Lab Biochem & Mol Pharmacol Chongqing, Chongqing 400016, Peoples R China."

来源：CURRENT STEM CELL RESEARCH & THERAPY

ESI学科分类：MOLECULAR BIOLOGY & GENETICS

WOS号：WOS:001038741400013

JCR分区：Q4

影响因子：2.1

年份：2023

卷号：18

期号：8

开始页：1160

结束页：1171

文献类型：Article

关键词：Lipocalin-2; bone morphogenetic protein 9; osteogenic differentiation; low-density lipoprotein receptor-related protein 6; Wnt/beta-catenin; MSCs

摘要："Background: Due to its effective osteogenic ability, BMP9 is a promising candidate for bone regeneration medicine. Whereas, BMP9 can also induce adipogenesis simultaneously. LCN2 is a cytokine associated with osteogenesis and adipogenesis. Reducing the adipogenic potential may be a feasible measure to enhance the osteogenic capability of BMP9. Objective: The objective of the study was to explore the role of LCN2 in regulating the BMP9-initialized osteogenic and adipogenic differentiation in mouse embryonic fibroblasts (MEFs), and clarify the possible underlying mechanism. Methods: Histochemical stain, western blot, real-time PCR, laser confocal, immunoprecipitation, cranial defect repair, and fetal limb culture assays were used to evaluate the effects of LCN2 on BMP9-induced osteogenic and adipogenic differentiation, as well as Wnt/ beta-catenin signaling. Results: LCN2 was down-regulated by BMP9. The BMP9-induced osteogenic markers were inhibited by LCN2 overexpression, but the adipogenic markers were increased; LCN2 knockdown exhibited opposite effects. Similar results were found in bone defect repair and fetal limb culture tests. The level of beta-catenin nucleus translocation was found to be reduced by LCN2 overexpression, but increased by LCN2 knockdown. The inhibitory effect of LCN2 overexpression on the osteogenic capability of BMP9 was reversed by beta- catenin overexpression; whereas, the effect of LCN2 knockdown on promoting BMP9 osteogenic potential was almost eliminated by beta-catenin knockdown. LCN2 could bind with LRP6 specifically, and the inhibitory effect of LCN2 on the osteogenic potential of BMP9 could not be enhanced by LRP6 knockdown. Conclusion: LCN2 inhibits the BMP9-induced osteogenic differentiation but promotes its adipogenic potential in MEFs, which may be partially mediated by reducing Wnt/beta-catenin signaling via binding with LRP6."

基金机构：National Natural Science Foundation of China (NSFC) [81572226]

基金资助正文："This study was funded by the National Natural Science Foundation of China (Grant no. NSFC, 81572226)."