PMID- 12375327 OWN - NLM STAT- MEDLINE DCOM- 20030224 LR - 20220409 IS - 0315-162X (Print) IS - 0315-162X (Linking) VI - 29 IP - 10 DP - 2002 Oct TI - Clues to pathogenesis of spondyloarthropathy derived from synovial fluid mononuclear cell gene expression profiles. PG - 2159-64 AB - OBJECTIVE: To use gene expression profiles of spondyloarthropathy (SpA) synovial fluid mononuclear cells (SFMC) to determine if there are transcripts that support the unfolded protein response (UPR) hypothesis, and to identify which cytokines/chemokines are being expressed and which cell fractions are involved. METHODS: Gene expression profiles were generated by microarray screening of SFMC of 5 patients with SpA, 5 patients with rheumatoid arthritis (RA), and peripheral blood mononuclear cells (PBMC) of 6 controls. Results were validated by reverse transcription polymerase chain reaction using samples from a larger panel of subjects. RESULTS: The repertoires of proinflammatory cytokines/chemokines expressed by SpA and RA SFMC were very similar: monocyte chemotractant protein 1 (MCP-1), interleukin 8 (IL-8), IL-1beta, endothelial-monocyte activating polypeptide II, interferon-gamma, and tumor necrosis factor-alpha. MCP-1 was highly expressed in SpA SFMC. There was enhanced expression of immunoglobulin heavy chain binding protein (BiP) in SpA, which is compatible with the UPR hypothesis. BiP was most highly expressed in the adherent fraction of SpA SFMC. CONCLUSION: Previous data postulating UPR in SpA are based on in vitro experiments with transfected cell lines. Our patient derived data suggest that it also occurs in vivo in the macrophages of SpA joints. FAU - Gu, Jieruo AU - Gu J AD - University of California Los Angeles, 90095, USA. FAU - Rihl, Markus AU - Rihl M FAU - Marker-Hermann, Elisabeth AU - Marker-Hermann E FAU - Baeten, Dominique AU - Baeten D FAU - Kuipers, Jens G AU - Kuipers JG FAU - Song, Yeong Wook AU - Song YW FAU - Maksymowych, Walter P AU - Maksymowych WP FAU - Burgos-Vargas, Ruben AU - Burgos-Vargas R FAU - Veys, Eric M AU - Veys EM FAU - De Keyser, Filip AU - De Keyser F FAU - Deister, Helmuth AU - Deister H FAU - Xiong, Momiao AU - Xiong M FAU - Huang, Feng AU - Huang F FAU - Tsai, Wen Chan AU - Tsai WC FAU - Yu, David Tak Yan AU - Yu DT LA - eng GR - GM56515/GM/NIGMS NIH HHS/United States GR - HL5448/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Canada TA - J Rheumatol JT - The Journal of rheumatology JID - 7501984 RN - 0 (Chemokines) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Chemokines/*genetics/metabolism MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Gene Expression MH - Gene Expression Profiling MH - Genetic Testing MH - Humans MH - Leukocytes, Mononuclear/*metabolism MH - Male MH - Middle Aged MH - *Oligonucleotide Array Sequence Analysis MH - Reverse Transcriptase Polymerase Chain Reaction MH - Spondylarthropathies/*genetics/metabolism/pathology MH - Synovial Fluid/cytology/*metabolism EDAT- 2002/10/11 04:00 MHDA- 2003/02/25 04:00 CRDT- 2002/10/11 04:00 PHST- 2002/10/11 04:00 [pubmed] PHST- 2003/02/25 04:00 [medline] PHST- 2002/10/11 04:00 [entrez] AID - 0315162X-29-2159 [pii] PST - ppublish SO - J Rheumatol. 2002 Oct;29(10):2159-64.