PMID- 31169312 OWN - NLM STAT- MEDLINE DCOM- 20200612 LR - 20200612 IS - 1097-4652 (Electronic) IS - 0021-9541 (Linking) VI - 234 IP - 12 DP - 2019 Dec TI - Upregulation of microRNA-9-5p inhibits apoptosis of chondrocytes through downregulating Tnc in mice with osteoarthritis following tibial plateau fracture. PG - 23326-23336 LID - 10.1002/jcp.28900 [doi] AB - Osteoarthritis (OA) is a common degenerative joint disease which is typically progressed with age, affecting smaller joints of hands, lower limbs, and the vertebral column. It has been reported that microRNAs could regulate the biological processes of OA. Therefore, the purpose of this study was to elucidate miR-9-5p's role in regulating cartilage remodeling of OA mice following tibial plateau fracture (TPF) through regulation of tenascin C (Tnc). Initially, we determined the expression of miR-9-5p and Tnc in mice with OA and then testified their relationship. The results displayed a high expression of Tnc, but a poor expression of miR-9-5p with high methylation in OA. Tnc was confirmed to be a target gene of miR-9-5p. Moreover, based on gain- and loss-function experiments, an increase of miR-9-5p and loss of Tnc had the potential to inhibit cell apoptosis, while facilitating cell proliferation, migration, invasion, and cartilage remodeling of mice with OA following TPF. This was further demonstrated by a higher expression of type II collagen, lower type X collagen, and protogenin expression. Subsequently, downregulation of miR-9-5p aggravated the pathological changes of mice, illustrated by an increase in the Mankin score. In conclusion, the present study proved that overexpression of miR-9-5p suppressed chondrocytes apoptosis and promoted cartilage remodeling through downregulating of Tnc in mice with OA. CI - (c) 2019 Wiley Periodicals, Inc. FAU - Chen, Hongwei AU - Chen H AD - Department of Orthopedics, Yiwu Central Hospital, Affiliated Hospital of Wenzhou Medical University, Yiwu, People's Republic of China. FAU - Yang, Jun AU - Yang J AD - Department of Orthopedics, The Affiliated Hospital of Xinyang Vocational and Technical College, Xinyang, People's Republic of China. FAU - Tan, Zhihong AU - Tan Z AUID- ORCID: 0000-0003-4311-8677 AD - Department of Orthopaedics, Huizhou Hospital of Traditional Chinese Medicine, Huizhou, People's Republic of China. LA - eng PT - Journal Article DEP - 20190606 PL - United States TA - J Cell Physiol JT - Journal of cellular physiology JID - 0050222 RN - 0 (MIRN9 microRNA, mouse) RN - 0 (MicroRNAs) RN - 0 (Tenascin) RN - 0 (Tnc protein, mouse) SB - IM MH - Animals MH - Apoptosis/physiology MH - Chondrocytes/*metabolism/pathology MH - Down-Regulation MH - Female MH - Gene Expression Regulation/*genetics MH - Knee Joint/metabolism/pathology MH - Mice MH - Mice, Inbred C57BL MH - MicroRNAs/*metabolism MH - Osteoarthritis/etiology/*metabolism/pathology MH - Tenascin/*metabolism MH - Tibial Fractures/complications/metabolism/pathology MH - Up-Regulation OTO - NOTNLM OT - Tnc OT - cartilage remodeling OT - microRNA-9-5p OT - osteoarthritis OT - tibial plateau fracture EDAT- 2019/06/07 06:00 MHDA- 2020/06/13 06:00 CRDT- 2019/06/07 06:00 PHST- 2019/01/14 00:00 [received] PHST- 2019/05/12 00:00 [revised] PHST- 2019/05/14 00:00 [accepted] PHST- 2019/06/07 06:00 [pubmed] PHST- 2020/06/13 06:00 [medline] PHST- 2019/06/07 06:00 [entrez] AID - 10.1002/jcp.28900 [doi] PST - ppublish SO - J Cell Physiol. 2019 Dec;234(12):23326-23336. doi: 10.1002/jcp.28900. Epub 2019 Jun 6.