PMID- 31611919 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 1687-966X (Print) IS - 1687-9678 (Electronic) VI - 2019 DP - 2019 TI - Glutamine Metabolism Is Essential for Stemness of Bone Marrow Mesenchymal Stem Cells and Bone Homeostasis. PG - 8928934 LID - 10.1155/2019/8928934 [doi] LID - 8928934 AB - Skeleton has emerged as an endocrine organ which is both capable of regulating energy metabolism and being a target for it. Glutamine is the most bountiful and flexible amino acid in the body which provides adenosine 5'-triphosphate (ATP) demands for cells. Emerging evidences support that glutamine which acts as the second metabolic regulator after glucose exerts crucial roles in bone homeostasis at cellular level, including the lineage allocation and proliferation of bone mesenchymal stem cells (BMSCs), the matrix mineralization of osteoblasts, and the biosynthesis in chondrocytes. The integrated mechanism consisting of WNT, mammalian target of rapamycin (mTOR), and reactive oxygen species (ROS) signaling pathway in a glutamine-dependent pattern is responsible to regulate the complex intrinsic biological process, despite more extensive molecules are deserved to be elucidated in glutamine metabolism further. Indeed, dysfunctional glutamine metabolism enhances the development of degenerative bone diseases, such as osteoporosis and osteoarthritis, and glutamine or glutamine progenitor supplementation can partially restore bone defects which may promote treatment of bone diseases, although the mechanisms are not quite clear. In this review, we will summarize and update the latest research findings and clinical trials on the crucial regulatory roles of glutamine metabolism in BMSCs and BMSC-derived bone cells, also followed with the osteoclasts which are important in bone resorption. CI - Copyright (c) 2019 Tao Zhou et al. FAU - Zhou, Tao AU - Zhou T AUID- ORCID: 0000-0002-7325-3629 AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, 610041 Chengdu, Sichuan, China. FAU - Yang, Yuqing AU - Yang Y AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, 610041 Chengdu, Sichuan, China. FAU - Chen, Qianming AU - Chen Q AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, 610041 Chengdu, Sichuan, China. FAU - Xie, Liang AU - Xie L AUID- ORCID: 0000-0001-6308-2654 AD - State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, 610041 Chengdu, Sichuan, China. LA - eng PT - Journal Article PT - Review DEP - 20190912 PL - United States TA - Stem Cells Int JT - Stem cells international JID - 101535822 PMC - PMC6757285 COIS- The authors declare that there is no conflict of interest regarding the publication of this paper. EDAT- 2019/10/16 06:00 MHDA- 2019/10/16 06:01 PMCR- 2019/09/12 CRDT- 2019/10/16 06:00 PHST- 2019/05/02 00:00 [received] PHST- 2019/08/23 00:00 [accepted] PHST- 2019/10/16 06:00 [entrez] PHST- 2019/10/16 06:00 [pubmed] PHST- 2019/10/16 06:01 [medline] PHST- 2019/09/12 00:00 [pmc-release] AID - 10.1155/2019/8928934 [doi] PST - epublish SO - Stem Cells Int. 2019 Sep 12;2019:8928934. doi: 10.1155/2019/8928934. eCollection 2019.