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Patients selected for the presence of scleroderma-related antibodies (anti-DNA-topoisomerase I [anti-topo I; n = 43], anticentromere antibody [ACA; n = 63], or anti-Pm-Scl [n = 12]) were studied for class I and class II major histocompatibility complex antigens, as well as for Gm and Km allotypes. Anti-topo I was associated with HLA-DR5 (70% of patients(More)
INTRODUCTION In the present study, we analysed in detail nuclear autoantibodies and their associations in systemic sclerosis (SSc) patients included in the German Network for Systemic Scleroderma Registry. METHODS Sera of 863 patients were analysed according to a standardised protocol including immunofluorescence, immunoprecipitation, line immunoassay and(More)
The specificity of the mouse class I-specific antibody COB6-3 was examined in detail. It was found to react with the mouse class I molecules H-2Db, Kd, and Qa-2, and with human HLA-A, −B, −C antigens. The specificity pattern of COB6-3, despite its different origin, was similar to that of the monomorphic HLA class I-specific antibody W6/32. Cross-inhibition(More)
Under selective growth conditions a revertant of mouse cells, defective in hypoxanthine phosphoribosyltransferase activity (HPRT, EC-No. 2.4.2.8), was isolated, which contained an electrophoretically abnormal form of HPRT activity. The specific HPRT activity in crude extracts of the revertant cells is about 30% of the level determined in normal wild type(More)
If a chromosomal fragment transferred into recipient cells were integrated or strongly associated with a specific recipient chromosome it should segregate with this chromosome in hybrid cells. In order to corroborate this prediction we studied two independent mouse cell clones (“transferent clones”) which had taken up by chromosomal gene transfer a human(More)
The detection of autoantibodies is an important element in the diagnosis and monitoring of disease progression in patients with autoimmune diseases. In laboratory diagnostic tests for connective tissue and autoimmune liver diseases, indirect immunofluorescence on HEp-2 cells plays a central role in a multistage diagnostic process. Despite the high quality(More)
The autoantigenic polymyositis/scleroderma (PM/Scl) complex was recently shown to be the human homologue of the yeast exosome, which is an RNA-processing complex. Our aim was to assess whether, in addition to targeting the known autoantigens PM/Scl-100 and PM/Scl-75, autoantibodies also target recently identified components of the PM/Scl complex. The(More)
BACKGROUND Systemic sclerosis (SSc)-overlap syndromes are a very heterogeneous and remarkable subgroup of SSc-patients, who present at least two connective tissue diseases (CTD) at the same time, usually with a specific autoantibody status. OBJECTIVES To determine whether patients, classified as overlap syndromes, show a disease course different from(More)
Different nephelometric assay systems for quantitation of C-reactive protein (CRP) were compared with radial immunodiffusion (RID) and tested for their susceptibility to interference by serum IgM rheumatoid factor (RF). In 3 nephelometric assays, RF was found to elevate CRP values. Sera with high RF content from patients with rheumatoid arthritis gave(More)
The aim of this study was to compare ELISA, immunodiffusion and immunoblot for the detection of anti-Jo-1 antibodies, and to investigate the association of the results with clinical manifestations. In two medical centres for rheumatology and one for pulmonology, all patients with suspected connective tissue disease were screened over a 5-year period for(More)