PMID- 33827262 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210507 IS - 2046-3758 (Print) IS - 2046-3758 (Electronic) IS - 2046-3758 (Linking) VI - 10 IP - 4 DP - 2021 Apr TI - Advanced oxidation protein products induce inflammatory responses and invasive behaviour in fibroblast-like synoviocytes via the RAGE-NF-kappaB pathway. PG - 259-268 LID - 10.1302/2046-3758.104.BJR-2020-0085.R2 [doi] AB - AIMS: Rheumatoid arthritis (RA), which mainly results from fibroblast-like synoviocyte (FLS) dysfunction, is related to oxidative stress. Advanced oxidation protein products (AOPPs), which are proinflammatory mediators and a novel biomarker of oxidative stress, have been observed to accumulate significantly in the serum of RA patients. Here, we present the first investigation of the effects of AOPPs on RA-FLSs and the signalling pathway involved in AOPP-induced inflammatory responses and invasive behaviour. METHODS: We used different concentrations of AOPPs (50 to 200 microg/ml) to treat RA-FLSs. Cell migration and invasion and the expression levels of tumour necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), matrix metalloproteinase-3 (MMP-3), and MMP-13 were investigated. Western blot and immuno fl uorescence were used to analyze nuclear factor-kappaB (NF-kappaB) activation. RESULTS: AOPPs promoted RA-FLS migration and invasion in vitro and signi fi cantly induced the messenger RNA (mRNA) and protein expression of TNF-alpha, IL-6, MMP-3, and MMP-13 in dose- and time-dependent manners. Moreover, AOPPs markedly activated the phosphorylation of nuclear factor-kappaB (NF-kappaB) p65 protein, which triggered inhibitory kappa B-alpha (IkappaBalpha) degradation, NF-kappaB p65 protein phosphorylation, and NF-kappaB p65 translocation into the nucleus. Furthermore, treatment with a neutralizing antibody specific to receptor for advanced glycation end products (RAGE) signi fi cantly suppressed aggressive behaviour and inflammation, decreased TNF-alpha, IL-6, MMP-3, and MMP-13 expression, and blocked AOPP-induced NF-kappaB pathway activation. CONCLUSION: The results indicate that AOPPs can enhance aggressive behaviour and the inflammatory response in RA-FLSs via the RAGE-NF-kappaB pathway. These results present AOPPs as a new class of potentially important mediators of progressive disease in RA patients. Cite this article: Bone Joint Res 2021;10(4):259-268. FAU - Lou, Aiju AU - Lou A AD - Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangdong, China. AD - Department of Rheumatology and Immunology, Liwan Central Hospital of Guangzhou, Guangzhou, Guangdong, China. FAU - Wang, Le AU - Wang L AD - Department of Orthopaedic Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. AD - Medical Technology and Related Equipment Research for Spinal Injury Treatment, City Key Laboratory, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. FAU - Lai, Weinan AU - Lai W AD - Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangdong, China. FAU - Zhu, DingJi AU - Zhu D AD - Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangdong, China. FAU - Wu, Weirong AU - Wu W AD - Department of Rheumatology and Immunology, Liwan Central Hospital of Guangzhou, Guangzhou, Guangdong, China. FAU - Wang, Zhao AU - Wang Z AD - Department of Orthopaedic Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. AD - Medical Technology and Related Equipment Research for Spinal Injury Treatment, City Key Laboratory, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. FAU - Cai, Zihong AU - Cai Z AD - Department of Orthopaedic Surgery, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. AD - Medical Technology and Related Equipment Research for Spinal Injury Treatment, City Key Laboratory, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China. FAU - Yang, Min AU - Yang M AD - Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangdong, China. LA - eng PT - Journal Article PL - England TA - Bone Joint Res JT - Bone & joint research JID - 101586057 PMC - PMC8077182 OTO - NOTNLM OT - Advanced oxidation protein products OT - Fibroblast-like synoviocyte OT - Receptor for advanced glycation end products OT - Rheumatoid arthritis EDAT- 2021/04/09 06:00 MHDA- 2021/04/09 06:01 PMCR- 2021/04/01 CRDT- 2021/04/08 05:26 PHST- 2021/04/08 05:26 [entrez] PHST- 2021/04/09 06:00 [pubmed] PHST- 2021/04/09 06:01 [medline] PHST- 2021/04/01 00:00 [pmc-release] AID - BJR-10-259 [pii] AID - 10.1302/2046-3758.104.BJR-2020-0085.R2 [doi] PST - ppublish SO - Bone Joint Res. 2021 Apr;10(4):259-268. doi: 10.1302/2046-3758.104.BJR-2020-0085.R2.