Small fragments of cartilage oligomeric matrix protein in synovial fluid and serum as markers for cartilage degradation

被引:2
作者
Neidhart, M
Hauser, N
Paulsson, M
Dicesare, PE
Michel, BA
Hauselmann, HJ
机构
[1] UNIV COLOGNE,FAC MED,INST BIOCHEM,D-5000 COLOGNE 41,GERMANY
[2] NYU,HOSP JOINT DIS,SCH MED,INST ORTHOPAED,NEW YORK,NY 10003
来源
BRITISH JOURNAL OF RHEUMATOLOGY | 1997年 / 36卷 / 11期
关键词
cartilage oligomeric matrix protein (COMP); osteoarthritis; rheumatoid arthritis; proteinases;
D O I
暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
We determined the tissue distribution of cartilage oligomeric matrix protein (COMP) in man and evaluated COMP in synovial fluid (SF) and serum. COMP was purified from human articular cartilage. Polyclonal antibodies were used to detect COMP in tissue cryosections an. protein extracts. COMP was determined quantitatively and qualitatively in SF and serum by competitive enzyme-linked immunosorbent assay and immunoblotting, Knee joint SF was taken from nine cadaveric and six living controls, 52 patients with osteoarthritis (OA), 85 patients with rheumatoid arthritis (RA! and GO patients with other forms of inflammatory arthritis. The degradative potential of SF on native COMP was tested in vitro. The highest concentrations of COMP were measured in articular cartilage and meniscus, the lowest in rib and trachea. Compared with controls, the concentrations of COMP in SF and serum were elevated in 36 and 50% of the patients. A total of 84% of patients with RA and 60% of patients with other forms of inflammatory arthritis showed significant amounts of low-molecular-weight COMP fragments (50-70 kDa) in SF. In contrast, SF fragments were present in only 21% of the OA patients. Furthermore, 13% of SF taken from patients with RA or other forms of inflammatory arthritis were able to degrade COMP in vitro. Using inhibitors, the involvement of serine proteinases could be demonstrated in only 8% of the cases. Based on these results, the absolute levels of COMP in SF and serum, and its fragmentation pattern in SF, seem to be promising as markers of joint tissue metabolism.
引用
收藏
页码:1151 / 1160
页数:10
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