연골표면에 침착한 면역물질의 양상에 관한 연구

Background: Immune deposits were found on the articular surface of rheumatoid arthritis and osteoarthritis even though the prevalence and pattern of immune deposits were differnt between rheumatoid arthritis and osteoarthritis. Authors conducted this study to compare the pattern and positive rate of immune deposits on surface of articular cartilage between rheumatoid arhtritis and osteorthritis. Methods: Articular cartilages were obtained from patients who were conducted total joint replacement surgery at knee or hip joint. Selected cases were 15cases of rheumatoid arthritis, 45cases of osteoarthritis. Immune deposits were searched using direct immunofluorescent technique with FITC conjugated anti-IgG, IgA, IgM, C, antibody. Results: 1) Positive rate of immune deposits on articular cartilage was 66.7% in rheumatoid arthrtis and 26.7% in osteoarthritis. 2) Granular staining pattern was found in only 6patients out of 10positive patients with rheumatoid arthritis. In osteoarthritis, the pattern of immune deposits was not granular but nongranular pattern such as intermittent linear or linear pattern. 3) Positive rate in primary osteoarthrits and secondary arthritis was 32%, and 26.7% respectively. 4) Rheumatoid factor was reactive not only in 6cases with granular pattern but also in 3cases without immune deposits and in 2cases with nongranular pattern. Coclusion: Immune deposits was found more frequently in rheumatoid arthritis than osteoarthritis and granular pattern was noted in cases with rheumatoid arthritis only. The differences in prevalence and pattern of immune deposits between rheumatoid arthritis and osteoarthritis may be due t different antigen, mechanism of immune deposition or another unknown factors. Further investigation have to be conducted in these respects.