PMID- 27542839 OWN - NLM STAT- MEDLINE DCOM- 20171128 LR - 20181113 IS - 1471-2474 (Electronic) IS - 1471-2474 (Linking) VI - 17 DP - 2016 Aug 19 TI - The effects of dopamine receptor 2 expression on B cells on bone metabolism and TNF-alpha levels in rheumatoid arthritis. PG - 352 LID - 10.1186/s12891-016-1220-7 [doi] LID - 352 AB - BACKGROUND: Dopamine receptor 2 (DR2) expressions on B cells from Rheumatoid arthritis (RA) patients has been found to be negatively correlated with disease activity and can potentially predict the response to treatment. This study aimed to investigate the role of B cell DR2 expression on bone remodeling in RA. METHODS: Patients with RA (n = 14) or osteoarthritis (OA; n = 12), and healthy controls (n = 12) were recruited for this study. Dopamine receptor (DR) 2 expression was assessed using flow cytometry. Pro-inflammatory cytokines, including interleuin(IL)-1beta, IL-6, IL-17, and tumor necrosis factor(TNF)-alpha, and bone turnovers, including osteocalcin (OC),serum procollagen type I N propeptide (PINP), C-terminal telopeptide of type I collagen (beta-CTX), collagen type I cross-linked telopeptide (ICTP), as well as matrix metalloproteinase-3 (MMP-3) and osteoprotegerin (OPG) were measured by electrochemiluminescence, chemiluminescence, or enzyme-linked immunosorbent assay. DR2 expression on synovial B cells from 4 RA patients and 3 OA patients was detected by immunofluorescence. RESULTS: There were more DR2(+)CD19(+) B cells in synovial tissues from RA patients than in those from OA patients. The frequency of peripheral B cells that expressed DR2 was positively correlated with plasma TNF-alpha level. Levels of ICTP and MMP-3 were significantly higher, and OPG were lower in RA patients compared to those in the OA group and healthy controls (all P < 0.05). CONCLUSION: The frequency of B cells that expressed DR2 showed a correlation with levels of the pro-inflammatory cytokine TNF-alpha. DR2(+)CD19(+) B cells in synovial tissues might have a role in bone metabolism and TNF-alpha production. FAU - Wei, Lei AU - Wei L AD - Department of Rheumatology, Zhongshan Hospital, Fudan University, No. 180, Road Fenglin, Shanghai, 200032, People's Republic of China. FAU - Sun, Ying AU - Sun Y AD - Department of Rheumatology, Zhongshan Hospital, Fudan University, No. 180, Road Fenglin, Shanghai, 200032, People's Republic of China. FAU - Kong, Xiu-Fang AU - Kong XF AD - Department of Rheumatology, Zhongshan Hospital, Fudan University, No. 180, Road Fenglin, Shanghai, 200032, People's Republic of China. FAU - Zhang, Chi AU - Zhang C AD - Department of Orthopedics, Zhongshan Hospital, Fudan University, Shanghai, China. FAU - Yue, Tao AU - Yue T AD - Department of Rheumatology, Guanghua Integrative Medicine Hospital, Shanghai, China. FAU - Zhu, Qi AU - Zhu Q AD - Department of Rheumatology, Guanghua Integrative Medicine Hospital, Shanghai, China. FAU - He, Dong-Yi AU - He DY AD - Department of Rheumatology, Guanghua Integrative Medicine Hospital, Shanghai, China. FAU - Jiang, Lin-Di AU - Jiang LD AD - Department of Rheumatology, Zhongshan Hospital, Fudan University, No. 180, Road Fenglin, Shanghai, 200032, People's Republic of China. zsh-rheum@hotmail.com. AD - Center of evidence based medicine, Fudan University, Shanghai, China. zsh-rheum@hotmail.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160819 PL - England TA - BMC Musculoskelet Disord JT - BMC musculoskeletal disorders JID - 100968565 RN - 0 (Antirheumatic Agents) RN - 0 (Cytokines) RN - 0 (Receptors, Dopamine D2) SB - IM MH - Adult MH - Aged MH - Antirheumatic Agents/therapeutic use MH - Arthritis, Rheumatoid/drug therapy/immunology/*metabolism MH - B-Lymphocytes/*metabolism MH - *Bone Remodeling MH - Case-Control Studies MH - Cytokines/blood MH - Female MH - Humans MH - Joint Capsule/metabolism MH - Male MH - Middle Aged MH - Osteoarthritis/metabolism MH - Receptors, Dopamine D2/*metabolism MH - Young Adult PMC - PMC4992283 OTO - NOTNLM OT - B cells OT - Bone metabolism OT - Dopamine receptor OT - Rheumatoid arthritis EDAT- 2016/08/21 06:00 MHDA- 2017/11/29 06:00 PMCR- 2016/08/19 CRDT- 2016/08/21 06:00 PHST- 2015/12/17 00:00 [received] PHST- 2016/08/13 00:00 [accepted] PHST- 2016/08/21 06:00 [entrez] PHST- 2016/08/21 06:00 [pubmed] PHST- 2017/11/29 06:00 [medline] PHST- 2016/08/19 00:00 [pmc-release] AID - 10.1186/s12891-016-1220-7 [pii] AID - 1220 [pii] AID - 10.1186/s12891-016-1220-7 [doi] PST - epublish SO - BMC Musculoskelet Disord. 2016 Aug 19;17:352. doi: 10.1186/s12891-016-1220-7.