PMID- 19490633 OWN - NLM STAT- MEDLINE DCOM- 20100322 LR - 20211020 IS - 1478-6362 (Electronic) IS - 1478-6354 (Print) IS - 1478-6354 (Linking) VI - 11 IP - 3 DP - 2009 TI - Nerve growth factor and receptor expression in rheumatoid arthritis and spondyloarthritis. PG - R82 LID - 10.1186/ar2716 [doi] AB - INTRODUCTION: We previously described the presence of nerve growth factor receptors in the inflamed synovial compartment. Here we investigated the presence of the corresponding nerve growth factors, with special focus on nerve growth factor (NGF). METHODS: mRNA expression levels of four ligands (NGF, brain derived growth factor (BDNF), neurotrophin (NT)-3, NT-4) and their four corresponding receptors (tyrosine kinase (trk) A, trkB, trkC, NGFRp75) were determined in the synovial fluid (SF) cells of 9 patients with rheumatoid arthritis (RA) and 16 with spondyloarthritis (SpA) and compared with 7 osteoarthritis (OA) patients. NGF was also determined in synovial tissue (ST) biopsies of 10 RA and 10 SpA patients. The production of NGF by monocytes and lymphocytes was assessed by flow cytometry of SF cells, synovial tissue derived fibroblast-like synoviocytes (FLS) were assessed by ELISA on culture supernatant. RESULTS: SF cell analysis revealed a clear BDNF and NGF mRNA expression, with significantly higher NGF expression in RA and SpA patients than in the OA group. NGF expression was higher in ST samples of RA as compared to SpA. Using intracellular FACS analysis, we could demonstrate the presence of the NGF protein in the two inflammatory arthritis groups on both CD3+ T lymphocytes and CD14+ cells, i.e. monocytes/macrophages, whereas cultured FLS did not produce NGF in vitro. CONCLUSIONS: Neurotrophins and especially NGF are expressed in the synovial fluid and tissue of patients with peripheral synovitis. The presence of neurotrophins as well as their receptors, in particular the NGF/trkA-p75 axis in peripheral synovitis warrants further functional investigation of their active involvement in chronic inflammatory arthritis. FAU - Barthel, Christian AU - Barthel C AD - Clinic for Immunology and Rheumatology, Hannover Medical School (MHH), Carl-Neuberg-Strasse 1, Hannover 30625, Germany. sanoa@t-online.de FAU - Yeremenko, Nataliya AU - Yeremenko N FAU - Jacobs, Roland AU - Jacobs R FAU - Schmidt, Reinhold E AU - Schmidt RE FAU - Bernateck, Michael AU - Bernateck M FAU - Zeidler, Henning AU - Zeidler H FAU - Tak, Paul-Peter AU - Tak PP FAU - Baeten, Dominique AU - Baeten D FAU - Rihl, Markus AU - Rihl M LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20090602 PL - England TA - Arthritis Res Ther JT - Arthritis research & therapy JID - 101154438 RN - 0 (Receptors, Nerve Growth Factor) RN - 9061-61-4 (Nerve Growth Factor) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Arthritis, Rheumatoid/genetics/*metabolism MH - Cells, Cultured MH - Female MH - Gene Expression Regulation/genetics MH - Humans MH - Male MH - Middle Aged MH - Nerve Growth Factor/*biosynthesis/genetics MH - Receptors, Nerve Growth Factor/*biosynthesis/genetics MH - Spondylarthritis/genetics/*metabolism MH - Synovial Fluid/metabolism MH - Young Adult PMC - PMC2714133 EDAT- 2009/06/06 09:00 MHDA- 2010/03/23 06:00 PMCR- 2009/06/02 CRDT- 2009/06/04 09:00 PHST- 2008/11/12 00:00 [received] PHST- 2009/05/11 00:00 [revised] PHST- 2009/06/02 00:00 [accepted] PHST- 2009/06/04 09:00 [entrez] PHST- 2009/06/06 09:00 [pubmed] PHST- 2010/03/23 06:00 [medline] PHST- 2009/06/02 00:00 [pmc-release] AID - ar2716 [pii] AID - 10.1186/ar2716 [doi] PST - ppublish SO - Arthritis Res Ther. 2009;11(3):R82. doi: 10.1186/ar2716. Epub 2009 Jun 2.