Abstract |
The consumption of alpha-2-macroglobulin (a2M) by proteinases in synovial fluids (SF) was indirectly measured by determining trypsin binding to solid-phase immunoadsorbed SF-a2M. In addition immune complexes (IC) were assessed by the solid-phase C1q-binding assay as well as the solid-phase conglutinin binding assay in rheumatoid (RA; n = 25) and osteoarthritic (OA; n = 9) SF. Elevated levels were found as follows: a2M X proteinase complexes (a2M X P) in 73.5% (RA, n = 20; OA, n = 5), solid-phase C1q-binding IC (C1q-IC) in 52% (13 out of 25 RA-SF) and bovine conglutinin binding IC (KgB-IC) in 54% (13 out of 24 RA-SF). All OA-SF were in either IC assay negative. Consumption of a2M in OA-SF and seronegative RA-SF was not more than 15% of total SF-a2M, showing a mean value of 19.5 and 13.5 micrograms a2M X P/ml SF. Seropositive RA-SF had an a2M X P mean value of 96.4 micrograms/ml SF, which differed significantly (p less than or equal to 0.05) from the former two groups. Similarly, RA-SF which were negative in either IC assay had a low a2M X P mean value (20.0 micrograms/ml SF). This contrasted sharply with the a2M X P means obtained in IC-positive RA-SF, which amounted to 131.5 micrograms a2M X P/ml SF in C1q-IC positive RA-SF and to 110.4 micrograms a2M X P/ml SF in KgB-IC positive RA-SF, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
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Authors | W Borth, J E Menzel |
Journal | International archives of allergy and applied immunology
(Int Arch Allergy Appl Immunol)
Vol. 75
Issue 1
Pg. 92-6
( 1984)
ISSN: 0020-5915 [Print] Switzerland |
PMID | 6204949
(Publication Type: Journal Article)
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Chemical References |
- Antigen-Antibody Complex
- Collectins
- Protease Inhibitors
- Serum Globulins
- alpha-Macroglobulins
- conglutinin
- Complement C1q
- Complement Activating Enzymes
- Endopeptidases
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Topics |
- Antigen-Antibody Complex
(metabolism)
- Arthritis, Rheumatoid
(immunology)
- Collectins
- Complement Activating Enzymes
(metabolism)
- Complement C1q
- Endopeptidases
(metabolism)
- Humans
- Knee Joint
- Osteoarthritis
(immunology)
- Protease Inhibitors
- Serum Globulins
(metabolism)
- Synovial Fluid
(enzymology, immunology)
- alpha-Macroglobulins
(metabolism)
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