Abstract
It was recently reported that plasma levels of adrenomedullin (AM), identified as a vasorelaxant peptide, are significantly higher in rheumatoid arthritis (RA) patients than in osteoarthritis (OA) patients. The objective of the present study was to elucidate AM production in synovial cells from patients with RA. Adrenomedullin mRNA was detected in cultured synovial cells from RA patients by reverse transcription polymerase chain reaction (RT-PCR). Immunohistochemical analysis demonstrated the presence of AM in synovial cells from RA patients. In addition, we investigated AM levels in knee joint fluids from RA and OA patients. Those from RA patients were elevated approximately threefold over those of OA patients. In this study, we demonstrated for the first time AM expression in synovial cells from RA patients and high levels of AM production in RA joint fluid.
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Matsushita, T., Matsui, N., Yoshiya, S. et al. Production of adrenomedullin from synovial cells in rheumatoid arthritis patients. Rheumatol Int 24, 20–24 (2004). https://doi.org/10.1007/s00296-003-0315-2
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DOI: https://doi.org/10.1007/s00296-003-0315-2