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Abstract Title:

Mangiferin enhances endochondral ossification-based bone repair in massive bone defect by inducing autophagy through activating AMP-activated protein kinase signaling pathway.

Abstract Source:

FASEB J. 2018 Mar 16:fj201701411R. Epub 2018 Mar 16. PMID: 29547701

Abstract Author(s):

Yun Bai, Chuan Liu, Lei Fu, Xiaoshan Gong, Ce Dou, Zhen Cao, Hongyu Quan, Jianmei Li, Fei Kang, Jingjin Dai, Chunrong Zhao, Shiwu Dong

Article Affiliation:

Yun Bai

Abstract:

Endochondral ossification is crucial for bone formation in both adult bone repair process and embryo long-bone development. In endochondral ossification, bone marrow-derived mesenchymal stem cells (BMSCs) first differentiate to chondrocyte, BMSC-derived chondrocyte then endure a hypertrophic process to generate new bone. Endochondral ossification-based bone repair is a promising strategy to cure massive bone defect, which is a major clinical issue in orthopedics. However, challenges still remain for this novel strategy. One challenge is to ensure the sufficient hypertrophic differentiation. Another is to maintain the survival of the above hypertrophic chondrocytes under the hypoxic environment of massive bone defect. To solve this issue, mangiferin (MAG) was introduced to endochondral ossification-based bone repair. In this report, we proved MAG to be a novel autophagy inducer, which promoted BMSC-derived hypertrophic chondrocyte survival against hypoxia-induced injury through inducing autophagy. Furthermore, MAG enhances hypertrophic differentiation of BMSC-derived chondrocytes via upregulating key hypertrophic markers. Mechanistically, MAG induced autophagy in BMSC-derived chondrocytes by promoting AMPKα phosphorylation. Additionally, MAG balanced the expression of sex-determining region Y-box 9 and runt-related transcription factor 2 to facilitate hypertrophic differentiation. These results indicated that MAG was a potential drug to improve the efficacy of endochondral ossification-based bone repair in massive bone defects.-Bai, Y., Liu, C., Fu, L., Gong, X., Dou, C., Cao, Z., Quan, H., Li, J., Kang, F., Dai, J., Zhao, C., Dong, S. Mangiferin enhances endochondral ossification-based bone repair in massive bone defect by inducing autophagy through activating AMP-activated protein kinase signaling pathway.

Study Type : Animal Study

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