PMID- 32869899 OWN - NLM STAT- MEDLINE DCOM- 20210709 LR - 20211204 IS - 1095-8355 (Electronic) IS - 1065-6995 (Linking) VI - 44 IP - 12 DP - 2020 Dec TI - microRNA-199a counteracts glucocorticoid inhibition of bone marrow mesenchymal stem cell osteogenic differentiation through regulation of Klotho expression in vitro. PG - 2532-2540 LID - 10.1002/cbin.11460 [doi] AB - Osteogenic differentiation (OD) of bone marrow mesenchymal stem cells (BMSCs) is critically important for mitigation of osteoporosis. Glucocorticoids (GCs) are extensively used for treating chronic inflammation, although long-term exposure to GCs is capable of triggering osteoporosis. microRNAs (miRNAs) have been reported to play a critical role in bone diseases. In the present study, we treated BMSCs with dexamethasone (DEX) during OD to stimulate GC-mediated osteoporosis. Microarray and quantitative polymerase chain reaction (Q-PCR) assays demonstrated that miR-199a was upregulated during OD of BMSCs, while DEX treatment caused a significant reduction in miR-199a. Alkaline phosphatase (ALP) activity, Alizarin red (AR) staining, and Q-PCR were applied to assess the role of miRNA-199a overexpression in DEX-triggered OD inhibition. miR-199a was able to rescue OD and ALP activity, which were inhibited by DEX. Additionally, we observed that ALP, BMP2, COL1A1, and Runx2 were increased after transfection of miRNA-199a mimics. Furthermore, we confirmed that miRNA-199a facilitates OD of BMSCs through direct inhibition of Klotho protein and messenger RNA expression affecting the downstream fibroblast growth factor receptor 1/extracellular-signal-regulated kinase and Janus kinase 1/signal transducer and activator of transcription 1 pathways. This study indicates that miR-199a plays a critical role in preventing GC-mediated osteoblast differentiation and may function as a promising miRNA biomarker for osteoporosis. CI - (c) 2020 International Federation for Cell Biology. FAU - Tang, Jinshan AU - Tang J AD - Department of Orthopedics, The Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an, Jiangsu, China. AD - Department of Orthopedics, The Second People's Hospital of Huai'an, Huai'an, Jiangsu, China. FAU - Yu, Huaixi AU - Yu H AD - Department of Orthopedics, The Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an, Jiangsu, China. AD - Department of Orthopedics, The Second People's Hospital of Huai'an, Huai'an, Jiangsu, China. FAU - Wang, Yunqing AU - Wang Y AD - Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Duan, Gang AU - Duan G AD - Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Wang, Bin AU - Wang B AD - Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Li, Wenbo AU - Li W AD - Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China. FAU - Zhu, Ziqiang AU - Zhu Z AUID- ORCID: 0000-0001-8848-2451 AD - Department of Orthopedics, The Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China. LA - eng PT - Journal Article DEP - 20200910 PL - England TA - Cell Biol Int JT - Cell biology international JID - 9307129 RN - 0 (Glucocorticoids) RN - 0 (MIRN199 microRNA, rat) RN - 0 (MicroRNAs) RN - 7S5I7G3JQL (Dexamethasone) RN - EC 3.2.1.31 (Glucuronidase) RN - EC 3.2.1.31 (Klotho Proteins) SB - IM MH - Animals MH - Bone Marrow Cells/metabolism MH - Cell Differentiation/drug effects MH - Cells, Cultured MH - Dexamethasone/adverse effects/pharmacology MH - Female MH - Glucocorticoids/metabolism/pharmacology MH - Glucuronidase/*metabolism MH - Klotho Proteins MH - Male MH - Mesenchymal Stem Cells/cytology/metabolism MH - MicroRNAs/*genetics/metabolism MH - Osteoblasts/metabolism MH - Osteogenesis/drug effects/*genetics MH - Osteoporosis/metabolism MH - Rats MH - Rats, Sprague-Dawley OTO - NOTNLM OT - GC OT - Klotho OT - OD OT - bone marrow mesenchymal stem cells OT - microRNA-199a EDAT- 2020/09/02 06:00 MHDA- 2021/07/10 06:00 CRDT- 2020/09/02 06:00 PHST- 2020/04/09 00:00 [received] PHST- 2020/08/11 00:00 [revised] PHST- 2020/08/30 00:00 [accepted] PHST- 2020/09/02 06:00 [pubmed] PHST- 2021/07/10 06:00 [medline] PHST- 2020/09/02 06:00 [entrez] AID - 10.1002/cbin.11460 [doi] PST - ppublish SO - Cell Biol Int. 2020 Dec;44(12):2532-2540. doi: 10.1002/cbin.11460. Epub 2020 Sep 10.