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PubMed1985

Null alleles of the fourth component of complement and HLA haplotypes in familial systemic lupus erythematosus.

Eight families (121 individuals) with two or more members affected with systemic lupus erythematosus (SLE) were analyzed for histocompatibility antigens (HLA-A, B, C, DR, MT, and MB) and complement antigens (C4A, C4B, and BF). These data were correlated with serological markers (antinuclear antibodies, single- and double-stranded anti-DNA, anti-SM, anti-nRNP, anti-Ro [SS-A], anti-La [SS-B], and biological false-positive tests for syphilis and clinical features. Fifteen members had SLE, and 19 had other immune diseases (subacute cutaneous lupus erythematosus, discoid lupus erythematosus, hypothyroidism, insulin-dependent diabetes mellitus, primary Sjogren's syndrome, immune thrombocytopenic purpura, rheumatoid arthritis, and multiple sclerosis). Twenty-three healthy relatives (seroreactors) had significant titers of circulating antibodies, as did 2 of 17 spouses. There was an increased frequency of null C4 alleles in those individuals with SLE (60%) and healthy relatives (50%) as compared with spouses (24%). Multivariate analysis showed a significant association between SLE and female sex (P =.006), whereas there was no significant association revealed between female sex and other immune diseases. Patients with SLE also had a higher frequency of either C4A or C4B null alleles (P = .01) than those with immune diseases. The C4A homozygous null phenotype was more common in SLE patients than in seroreactors (P = .02). There was a higher frequency of HLA-DR2 and DR3 in individuals with SLE than in those with immune disease (P = .08), seroreactors (P = .02) and normal relatives (P = .002). One totally C4-deficient patient with SLE was identified. These families demonstrate an important association between SLE and the C4 null allele and the HLA-DR2 and DR3. These risk factors, however, cannot account for the development of disease in all individuals.

Adult↗
PubMed1978

DNA antibodies detected by microhemagglutination test in the diagnosis of systemic lupus erythematosus.

A method of tanned erythrocyte agglutination of wide applicability is described for the study of DNA antibodies. The practical aspects of the method have been explored in estimation of antibodies to DNA in human cases of systemic lupus erythematosus, discoid lupus erythematosus, rheumatoid arthritis, other collagenoses and not related diseases. This method was found to be of high sensitivity and specificity, detecting DNA antibodies only in sera of systemic lupus erythematosus. Results were compared with those obtained by immunofluorescence test using rat liver hepatocytes as source of nuclei.

Antibodies↗
PubMed2005

[Thalidomide in the treatment of chronic discoid lupus erythematosus].

INTRODUCTION: Thalidomide is the second line treatment of chronic lupus erythematosus. The efficacy of this treatment, the minimal effective doses and tolerance are poorly documented in the literature. PATIENTS AND METHODS: We present the data of a single-center retrospective studied among 18 patients with chronic lupus erythematosus, treated with thalidomide from 1998 to 2003. Inclusion criteria were: the presence of clinical lesions evoking the disease, confirmed by histological examination and direct immunofluorescence and treatment with thalidomide for more than 2 months. RESULTS: Mean age on diagnosis was of 35.8 years. Thalidomide had been initiated a mean of 10.6 years after diagnosis of chronic lupus erythematosus. In 13 out of 18 patients, thalidomide had been prescribed because of failure with prior treatments. Fifteen patients were improved by thalidomide (83.3 p. 100), with 11 (61 p. 100) complete and 4 (22 p. 100) partial remissions. Two (11 p. 100) patients were stabilized and treatment failed in one. The mean initial dose was of 100 mg/d (50-150), and maintenance dose was of around 50 mg/d (56 mg/d). The mean follow-up with thalidomide was of 19.4 months. Only one withdrawal due to side effects was reported. The most frequent side effects were: asthenia (33 p. 100), paresthesia (22 p. 100) and weight gain (16.6 p. 100). No side effects were reported in 10 out of 18 patients. DISCUSSION: This study confirms the efficacy of low dose thalidomide in the treatment of chronic lupus erythematosus. In our experience, tolerance to this treatment is good, the most frequent side effect was asthenia, but usually mild. No significant peripheral neuropathy was noted. The fear of side effects, notably neurological, should not delay initiation of thalidomide in the case of failure with current treatments.

Adolescent↗