Abstract | OBJECTIVE: METHODS: Sensitized animals were treated at the time of arthritis induction with a single intraarticular (IA) dose of the membrane-targeting regulator APT070, a non-membrane-targeting control regulator (APT898), or vehicle control, and disease was assessed clinically and histologically. In addition, immunocytochemical analysis was performed on sections from normal rat knee joints at various time points after IA injection with APT070. RESULTS: Animals treated with APT070 showed a dose-dependent therapeutic effect, with significantly milder clinical and histologic disease compared with both other treatment groups (P < 0.008 at the higher dose) and minimal evidence of erosive disease at study end in the active treatment group. Immunoperoxidase and immunofluorescence studies demonstrated local retention of APT070 on cell surface membranes within the normal joint up to 48 hours after IA injection. CONCLUSION: These results show that IA complement inhibition represents an effective therapeutic strategy in experimental arthritis, by demonstrating that the exogenous delivery of a membrane-targeting complement regulator can result in prolonged synovial cell surface binding and significant clinical benefit in vivo. Complement inhibitory strategies of this type should be considered as novel therapies in human inflammatory arthritis.
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Authors | S M Linton, A S Williams, I Dodd, R Smith, B D Williams, B P Morgan |
Journal | Arthritis and rheumatism
(Arthritis Rheum)
Vol. 43
Issue 11
Pg. 2590-7
(Nov 2000)
ISSN: 0004-3591 [Print] United States |
PMID | 11083285
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antigens
- Complement Inactivator Proteins
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Topics |
- Animals
- Antigens
- Arthritis, Experimental
(drug therapy, immunology)
- Complement Inactivator Proteins
(therapeutic use)
- Knee Joint
(chemistry, pathology)
- Male
- Rats
- Rats, Inbred Lew
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