Virus-like particles in rheumatoid synovium.
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Biomedical subjects
Publications and source records attributed to T Neumark.
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Cultures of synovial cells from 8 patients with classical or determined rheumatoid arthritis and 3 patients with non-rheumatoid arthrosis were examined electron microscopically. Cells of the monolayer formed upon prolonged incubation of tissue pieces had the conventional ultrastructure of synovial cells. In 2 out of 8 cultures of rheumatoid synovial cells after 14 days of incubation, budding virus-like particles with the external diameter of 100-120 nm were observed. Morphologically these particles were very similar to retroviruses. Isolated particles had a buoyant density in sucrose of 1.15-1.17 g/cm3.