[HLA DR7 as a protective factor against gold salt toxicity in rheumatoid arthritis]. / HLA DR7 como factor de protección frente a la toxicidad por sales de oro en la artritis reumatoide.

We performed a study of antigens HLA type I and II (specificity DR) in 90 patients with diagnosis of Rheumatoid Arthritis (RA) treated with Sodium Aurothiomalate (SATM) in order to detect the presence of an antigen HLA which could act as a protective factor against toxicity by SATM. Our results demonstrated a decrease in the frequency of the antigen DR7 in patients with toxicity by SATM, which suggests a protective factor of this antigen against the development of toxic reactions due to gold salts.