Elevated plasma stromelysin levels in arthritis.
OBJECTIVE
To determine whether plasma concentrations of stromelysin-1 and gelatinase A are increased in patients with various forms of arthritis.


METHODS
A sensitive and specific sandwich enzyme linked immunosorbent assay (ELISA), which employs a murine monoclonal antibody and a rabbit polyclonal antibody to human stromelysin-1, was used to measure plasma stromelysin-1 in 53 healthy subjects, 113 patients with various forms of arthritis and connective tissue diseases, and 65 patients with cancer. Gelatinase A was also measured in these patients using specific polyclonal and monoclonal antibodies to gelatinase A in an ELISA:


RESULTS
The plasma concentration of stromelysin-1 (X +/- SEM) was significantly increased (p < 0.001) in patients with rheumatoid arthritis (RA) (187 +/- 14 ng/ml) and systemic lupus erythematosus (SLE) (258 +/- 35 ng/ml) as compared to both healthy control subjects (50 +/- 4 ng/ml) or patients with cancer (61 +/- 20 ng/ml). Plasma stromelysin-1 was also significantly increased in smaller groups of men with osteoarthritis (OA) and gout. In contrast, plasma concentrations of gelatinase A were not significantly increased in patients with RA, OA or gout. In healthy subjects, the concentration of stromelysin-1 was significantly higher in men than women. No correlation was noted between plasma stromelysin-1 levels and age.


CONCLUSIONS
The detection of elevated plasma levels of stromelysin-1 in patients with RA is consistent with increased stromelysin-1 concentrations in inflamed synovial tissues in this disease. The origin of increased plasma stromelysin-1 in SLE is speculative. Measurement of plasma stromelysin-1 may be useful in the diagnosis and management of patients with various forms of arthritis.
Zucker
S
S
Department of Veterans Administration Medical Center, Northport, NY 11768.
Lysik
R M
RM
Zarrabi
M H
MH
Greenwald
R A
RA
Gruber
B
B
Tickle
S P
SP
Baker
T S
TS
Docherty
A J
AJ
D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D000818:Animals; D000911:Antibodies, Monoclonal; D001168:Arthritis / Q000201:enzymology*; D001172:Arthritis, Rheumatoid / Q000201:enzymology*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D018093:Gelatinases / Q000097:blood; D006073:Gout / Q000201:enzymology; D006801:Humans; D008180:Lupus Erythematosus, Systemic / Q000201:enzymology*; D008297:Male; D020778:Matrix Metalloproteinase 2; D019278:Matrix Metalloproteinase 3; D008666:Metalloendopeptidases / Q000097:blood*; D051379:Mice; D008875:Middle Aged; D010003:Osteoarthritis / Q000201:enzymology; D011817:Rabbits
D000911:Antibodies, Monoclonal; D018093:Gelatinases; D008666:Metalloendopeptidases; D019278:Matrix Metalloproteinase 3; D020778:Matrix Metalloproteinase 2