[Systemic lupus erythematosus and anti-native desoxyribonucleic acid antibodies: clinical and laboratory comparison of the results given by two methods of detection (author's transl)].

Simultaneous application of two methods for the detection of anti-native DNA antibodies (indirect immunofluorescence on DNA fibres and Farr's radioimmunological method with native DNA labelled C14) to 53 serum samples from 32 patients suffering from systemic lupus erythematosus (SLE) indicated a certain number of discordances between the results obtained. Correlations between clinical and laboratory findings were found, such that certains types of anti-native DNA antibodies (n) may be specific to certain clinical manifestations of SLE: a good correlation was seen between She fixation of anti-C14 nDNA and the titre of IF anti-nDNA in the group of SLE with renal involvement, but was not found in the group of SLE with central nervous system involvement. There was no parallel between the course of renal involvement and anti-nDNA antibody titres, without treatment being directly responsible. The significance of the presence or absence of anti-DNA antibodies with the two methods of detection used is not of any single significance. Several types of anti-nDNA antibodies are present in a given specimen of lupus serum. Certain anti-nDNA antibodies are not detected or are at the limit of a positive result in the presence of neurological manifestations. From a practical standpoint, the use of several laboratory tests is desirable for the possible investigation of SLE.