Influence of low doses of methotrexate on superoxide anion production by polymorphonuclear leukocytes from patients with rheumatoid arthritis.
J Rheumatol
; 22(4): 633-8, 1995 Apr.
Article
en En
| MEDLINE
| ID: mdl-7791154
OBJECTIVE: The mechanism of methotrexate (MTX) action in rheumatoid arthritis (RA) is unclear. We assessed the influence of MTX on neutrophil superoxide production evaluated by ferricytochrome c reduction. METHODS: Neutrophils were collected from MTX treated patients with RA (MTX-RA), patients with RA without medication (RA) and healthy donors, cocultured with MTX or MTX-RA serum. RESULTS: Polymorphonuclear leukocytes (PMN) from MTX-RA showed decreased superoxide production when compared with cells collected from patients with RA and controls. Control PMN superoxide production was inhibited (36%) by MTX-RA serum incubation. This reduction was accompanied by clinical improvement. MTX had no activity in the in vitro assays. CONCLUSION: MTX treatment may interfere with neutrophil superoxide production.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Artritis Reumatoide
/
Metotrexato
/
Superóxidos
/
Neutrófilos
Límite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Rheumatol
Año:
1995
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Canadá