PMID- 34447637 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220426 IS - 2167-8359 (Print) IS - 2167-8359 (Electronic) IS - 2167-8359 (Linking) VI - 9 DP - 2021 TI - Exploring the role of monocyte chemoattractant protein-1 in fibroblast-like synovial cells in rheumatoid arthritis. PG - e11973 LID - 10.7717/peerj.11973 [doi] LID - e11973 AB - BACKGROUND: Rheumatoid arthritis (RA) is a chronic systemic inflammatory disease with persistent synovitis. In the present study, the impact of monocyte chemoattractant protein-1 (MCP-1) was explored to determine methods for the diagnosis and treatment of RA. METHODS: First, fibroblast-like synoviocytes (FLSs) were obtained from a collagen-induced rat RA model. Next, MCP-1-overexpression plasmid and small interfering RNA were transfected into human and rat FLSs. Cell Counting Kit-8 (CCK-8), Transwell migration and flow cytometry assays were used to analyze cell proliferation, migration and apoptosis of FLSs following MCP-1 transfections, respectively. Furthermore, western blotting was used to analyze the expression levels of p-P38, p-PI3K, PI3K, CD31, VEGF, TNF-alpha and IL-beta in FLSs following MCP-1 transfection. In addition, reverse transcription-quantitative PCR and ELISAs were used to analyze the expression levels of C-reactive protein (CRP), estrogen receptor, MCP-1 and pentraxin-3 in patients with clinical RA, followed by correlation analysis of clinical data. Finally, expression validation, diagnostic and protein-protein interaction (PPI) network analysis of MCP-1 were performed. RESULTS: MCP-1 promoted FLS proliferation and migration, and affected the apoptosis of FLSs. In addition, the expression levels of p-P38, p-PI3K, PI3K, CD31, VEGF, TNF-alpha and IL-beta were also affected by MCP-1. In patients with clinical RA, the expression level of MCP-1 was increased. Moreover, CRP expression level was significantly up-regulated in RA. Clinically, MCP-1 was strongly correlated with tender joint count, swollen joint count, visual analog scale for general health and disease activity score 28 (DAS28)-MCP-1, and was moderately correlated with DAS28 and DAS28-CRP. PPI analysis showed that MCP-1 mainly interacted with other inflammatory cytokines. CONCLUSION: In conclusion, MCP-1 may play a significant regulatory role in RA, and could be used as a measurement index of clinical RA activity. CI - (c)2021 Tong et al. FAU - Tong, Xiang AU - Tong X AD - Department of Orthopedic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. FAU - Yu, Dongdong AU - Yu D AD - Department of Orthopedic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. FAU - Yu, Li AU - Yu L AD - Operating Room, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. FAU - Chen, Weiqian AU - Chen W AD - Department of Rheumatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. FAU - Wen, Yanling AU - Wen Y AD - Department of Rheumatology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. FAU - Gu, Pengcheng AU - Gu P AD - Department of Orthopedic Surgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China. LA - eng PT - Journal Article DEP - 20210811 PL - United States TA - PeerJ JT - PeerJ JID - 101603425 PMC - PMC8364321 OTO - NOTNLM OT - Apoptosis OT - DAS28-MCP-1 OT - Fibroblast-like synoviocytes cells OT - Migration OT - Monocyte chemoattractant protein-1 OT - Over-expression OT - Proliferation OT - Rheumatoid arthritis OT - Silence OT - Western blotting COIS- The authors declare there are no competing interests. EDAT- 2021/08/28 06:00 MHDA- 2021/08/28 06:01 PMCR- 2021/08/11 CRDT- 2021/08/27 06:56 PHST- 2021/02/04 00:00 [received] PHST- 2021/07/23 00:00 [accepted] PHST- 2021/08/27 06:56 [entrez] PHST- 2021/08/28 06:00 [pubmed] PHST- 2021/08/28 06:01 [medline] PHST- 2021/08/11 00:00 [pmc-release] AID - 11973 [pii] AID - 10.7717/peerj.11973 [doi] PST - epublish SO - PeerJ. 2021 Aug 11;9:e11973. doi: 10.7717/peerj.11973. eCollection 2021.