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Rev. méd. Chile ; 127(4): 411-20, abr. 1999. tab
Artigo em Espanhol | LILACS | ID: lil-243911

RESUMO

Background: Patients with inactive systemic lupus erythematosus (SLE) and elevated high affinity double-stranded anti-DNA antibodies (anti-dsDNA), measured using Farr technique, would have a risk of relapse that fluctuates between 40 to 80 percent according to different series. Aim: To study the association between anti-dsDNA levels measured using Farr technique and disease activity and their predictive capacity for relapses. Material and methods: Anti-dsDNA antibodies were measured according to Farr method in 60 healthy subjects, 69 patients with other connective tissue diseases and in 120 patients with SLE. Farr positive were considered those individuals with anti-dsDNA levels over 10.4 IU/ml. Disease activity, assessed using MEX-SLEDAI score was related with anti-dsDNA levels in 101 patients. Forty seven patients with inactive disease were followed for 17ñ14 months. Results: Anti-dsDNA levels were 3ñ2.5 IU/ml (range 1-26) in subjects without LED, and 127ñ500 IU/ml (range 1-5280) in patients with LED. Sixty subjects had an active SLE and 43 (72 percent) were Farr positive; in 41 the disease was inactive and 13 (32 percent) were Farr positive (p <0.001), OR 5.45. Twelve of the 47 followed patients had a relapse and 10 (83 percent) were Farr positive. Of those that did not have a relapse, 13 (37 percent) were Farr positive (p< 0.02, RR 5.22). Six of 15 patients that were followed for more than on year (40 percent), were Farr positive. Conclusions: Elevated anti-dsDNA antibodies measured using Farr technique in patients with inactive generalised lupus erythematosus, predicted the risk of relapse. However less than half of patients with inactive disease and elevated Farr relapsed in a period of one year. The need to treat patients with inactive SLE and positive Farr should therefore be considered debatable


Assuntos
Humanos , Masculino , Feminino , Adolescente , Adulto , Pessoa de Meia-Idade , Anticorpos Antinucleares , Ensaio de Radioimunoprecipitação/métodos , Lúpus Eritematoso Sistêmico/diagnóstico , Prednisona/uso terapêutico , Retorno de Sintomas Antigos , Valor Preditivo dos Testes , Doença Mista do Tecido Conjuntivo/complicações , Lúpus Eritematoso Sistêmico/complicações , Lúpus Eritematoso Sistêmico/imunologia , Lúpus Eritematoso Sistêmico/tratamento farmacológico
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