Abstract
The immunohistochemical staining of cyclins was done to evaluate the proliferating cells in synovial tissue of rheumatoid arthritis (RA). Synovial specimens obtained from 18 patients with RA, 12 with osteoarthritis (OA), and 8 with traumatic arthritis (TA) were used for immunostaining of cyclins A and B1 and proliferating cell nuclear antigen (PCNA). The positive cells in lining layer (synoviocytes) and sublining layer (lymphoid and nonlymphoid cells) were counted. Moreover, the relationship between the frequency of their positive cells and clinical data of RA patients was analyzed statistically. In general, cyclin-A-, cyclin-B1-, and PCNA-positive cells in RA were more frequently observed as compared with those in OA and TA. Significant differences were found between RA and OA or TA in cyclin-A-, cyclin-B1-, and PCNA-positive sublining lymphoid cells, between RA and OA or TA in cyclin-B1- and PCNA-positive sublining nonlymphoid cells, and between RA and OA in cyclin-B1-positive synoviocytes. The ratio of cyclin-A- or cyclin-B1-positive cells per PCNA-positive cells was significantly higher in sublining lymphoid cells in RA than TA and in sublining lymphoid and nonlymphoid cells of RA than OA or TA. Moreover, a better relations...Continue Reading
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