PMID- 32805694 OWN - NLM STAT- MEDLINE DCOM- 20210331 LR - 20210331 IS - 1878-1705 (Electronic) IS - 1567-5769 (Linking) VI - 88 DP - 2020 Nov TI - Inhibition of GPR17 with pranlukast protects against TNF-alpha-induced loss of type II collagen in ATDC5 cells. PG - 106870 LID - S1567-5769(20)30864-X [pii] LID - 10.1016/j.intimp.2020.106870 [doi] AB - Osteoarthritis (OA) is a common joint disease affecting millions of elderly people worldwide. However, the mechanism of OA is complicated and remains poorly understood. Thus, a safe and effective therapeutic strategy has yet to be developed. G protein-coupled receptor 17 (GPR17) is an orphan receptor that is widely distributed in the central nervous system (CNS). GPR17 has become a target for the treatment of inflammation in brain diseases. In this study, we demonstrate that GPR17 is expressed in ATDC5 cells and is increased in response to TNF-alpha exposure. We also found that antagonism of GPR17 with pranlukast significantly inhibited oxidative stress by downregulating the intracellular level of reactive oxygen species (ROS) and increasing the activity of super oxide dismutase (SOD) against TNF-alpha. Interestingly, treatment with pranlukast prevented TNF-alpha-induced reduction of type II collagen. Additionally, knockdown of GPR17 with siRNA ameliorated TNF-alpha-induced loss of type II collagen, suggesting the importance of the role of GPR17 in mediating the impairment of type II collagen. Blockage of GPR17 with pranlukast suppressed the expression of matrix metalloproteinases 3 (MMP-3) and matrix metalloproteinases 13 (MMP-13), which contribute to the degradation of type II collagen. Pranlukast also prevented the activation of the JAK2/STAT1/IRF-1 signaling pathway, thereby suppressing the expression of pro-inflammatory cytokines and enzymes. Furthermore, pranlukast rescued TNF-alpha-induced reduced SOX-9 expression. Together, our data indicate that GPR17 might be a potential target for the treatment of OA. CI - Copyright (c) 2020. Published by Elsevier B.V. FAU - Wang, Zhangfu AU - Wang Z AD - Department of Spine Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Taizhou 317000, China. FAU - Zhou, Weiwei AU - Zhou W AD - Department of Spine Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Taizhou 317000, China. FAU - Zheng, Guangbin AU - Zheng G AD - Department of Spine Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Taizhou 317000, China. FAU - Yang, Guangyong AU - Yang G AD - Department of Spine Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Taizhou 317000, China. Electronic address: yanggy0576@163.com. LA - eng PT - Journal Article DEP - 20200814 PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 0 (Chromones) RN - 0 (Collagen Type II) RN - 0 (GPR17 protein, mouse) RN - 0 (Interferon Regulatory Factor-1) RN - 0 (Irf1 protein, mouse) RN - 0 (Leukotriene Antagonists) RN - 0 (Nerve Tissue Proteins) RN - 0 (Reactive Oxygen Species) RN - 0 (Receptors, G-Protein-Coupled) RN - 0 (SOX9 Transcription Factor) RN - 0 (STAT1 Transcription Factor) RN - 0 (Sox9 protein, mouse) RN - 0 (Stat1 protein, mouse) RN - 0 (Tumor Necrosis Factor-alpha) RN - EC 1.15.1.1 (Superoxide Dismutase) RN - EC 2.7.10.2 (Jak2 protein, mouse) RN - EC 2.7.10.2 (Janus Kinase 2) RN - EC 3.4.24.- (Matrix Metalloproteinase 13) RN - EC 3.4.24.- (Mmp13 protein, mouse) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) RN - EC 3.4.24.17 (Mmp3 protein, mouse) RN - TB8Z891092 (pranlukast) SB - IM MH - Animals MH - Cell Line, Tumor MH - Chromones/*pharmacology MH - Collagen Type II/*drug effects/genetics/*metabolism MH - Gene Knockdown Techniques MH - Interferon Regulatory Factor-1/metabolism MH - Janus Kinase 2/metabolism MH - Leukotriene Antagonists/*pharmacology MH - Matrix Metalloproteinase 13/metabolism MH - Matrix Metalloproteinase 3/metabolism MH - Mice MH - Nerve Tissue Proteins/*antagonists & inhibitors/genetics/*metabolism MH - Osteoarthritis/prevention & control MH - Oxidative Stress/drug effects MH - Reactive Oxygen Species/metabolism MH - Receptors, G-Protein-Coupled/*antagonists & inhibitors/genetics/*metabolism MH - SOX9 Transcription Factor/metabolism MH - STAT1 Transcription Factor/metabolism MH - Signal Transduction/drug effects MH - Superoxide Dismutase/metabolism MH - Tumor Necrosis Factor-alpha/pharmacology OTO - NOTNLM OT - GPR17 OT - IRF-1 OT - JAK2/STAT1 OT - MMPs OT - Osteoarthritis OT - Oxidative stress OT - Pranlukast OT - SOX-9 COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2020/08/18 06:00 MHDA- 2021/04/01 06:00 CRDT- 2020/08/18 06:00 PHST- 2020/03/23 00:00 [received] PHST- 2020/07/20 00:00 [revised] PHST- 2020/07/31 00:00 [accepted] PHST- 2020/08/18 06:00 [pubmed] PHST- 2021/04/01 06:00 [medline] PHST- 2020/08/18 06:00 [entrez] AID - S1567-5769(20)30864-X [pii] AID - 10.1016/j.intimp.2020.106870 [doi] PST - ppublish SO - Int Immunopharmacol. 2020 Nov;88:106870. doi: 10.1016/j.intimp.2020.106870. Epub 2020 Aug 14.