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  • 1
    Electronic Resource
    Electronic Resource
    Pathogenesis of SLE: immunopathology in man (1991)
    Springer
    Rheumatology international 11 (1991), S. 95-100 
    Details
    ISSN: 1437-160X
    Keywords: Systemic lupus erythematosus ; Plasma nucleic acids ; Anti-dsDNA antibodies ; Retrovirus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antibodies against native DNA are not only a disease-specific marker for systemic lupus erythematosus (SLE); in addition, there is good direct evidence that these antibodies also play a major part in pathogenic mechanisms leading to systemic and organ-specific disease manifestations. The origin of anti-dsDNA antibodies is still poorly understood, especially s dsDNA per se is not immunogenic. As recently shown, evidence is now accumulating that anti-dsDNA antibodies are not germline-encoded but antigen-driven, as demonstrated by the establishment of human anti-dsDNA antibody clones from SLE patients and sequence analysis. In sera of SLE patients there is an elevated level of nucleic acids, which indicates that defective clearance mechanisms for nucleic acids are present. The question as to whether these nucleic acids could serve as an antigen has been recently addressed by studies of plasma nucleic acids isolated addressed by studies of plasma nucleic acids isolated from circulating immune complexes from SLE patients. These studies indicate that plasma nucleic acids in SLE patients have structures of amino acid sequences which have a striking homology with the gag-pol overlap region of HIV-1. Whether these nucleic acids play a role in the pathogenesis of SLE, indicating the involvement of a retrovirus in the pathogenesis, or whether they rather reflect an amino acid homology with an endogenous human retrovirus family is not yet known.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00304495
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The genetic basis of Ro and La antibody formation in systemic lupus erythematosus (1992)
    Springer
    Rheumatology international 11 (1992), S. 243-249 
    Details
    ISSN: 1437-160X
    Keywords: Systemic lupus erythematosus ; Ro and La antibodies ; Multicenter study ; Genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antibodies against Ro and La, including recombinant La and recombinant 60 kD-Ro, were determined by counter immunoelectrophoresis and ELISA in over 300 central European systemic lupus erythematosus (SLE) patients. The presence of both Ro and La antibodies was strongly associated with the MHC haplotype B8-C4AQ0-DR3-DQ2, the association being stronges for DR3. After exclusion of all B8-DR3 positive patients only DR3 positive patients still showed an increased incidence of Ro and La antibodies, suggesting DR3 as the primary association factor. High titers of La antibody, but not of 60 kD-Ro antibody, were also significantly associated with the presence of DR3. Other DR and DQ antigens or heterozygous DQ combinations were not significantly associated with Ro and La antibodies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301501
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    HLA class II genes and antibodies against recombinant U1-nRNP proteins in patients with systemic lupus erythematosus (1994)
    Springer
    Rheumatology international 14 (1994), S. 63-69 
    Details
    ISSN: 1437-160X
    Keywords: Systemic lupus erythematosus ; Recombinant U1-nRNP proteins ; Genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To investigate a possible involvement of HLA-class II alleles in the genetic predisposition for the formation of anti-U1-nRNP antibody in systemic lupus erythematosus (SLE), genomic DNA of 178 patients was typed for the DRB1, DQA1 and DQB1 alleles using a polymerase chain reaction (PCR) and non-radioactive-oligonucleotide typing. Antibodies against recombinant U1-nRNP proteins (U1-A- U1-C-and 70K-protein) were determined by ELISA. Anti-U1-C antibody was found in 26 (14.7%), anti-U1-A in 34 (19.2%) and anti-70K in 17 (9.6%) patients. A joint occurrence was observed for these antibodies against the recombinant U1-nRNP proteins: anti-U1-C and anti-U1-A antibodies occurred together more frequently than alone and than together with anti-U1-70K antibodies. The frequency of DRB1 * 04 was slightly increased in the patients with anti-U1-C as compared to the patients without anti-U1-C (P〈0.05, Pcorr=n.s., RR=2.4). The DQA1 * 0301 allele, which is in linkage disequilibrium with DRB1 * 04, is found more frequently in anti-U1-C-positive than in antibody-negative patients. The DQB1 * 0303 allele, detected in 12 of 176 SLE patients, was absent in the patients with any of the antibodies against the U1-nRNP proteins. All these deviations may be due to chance alone. We concluded that the presence of antibodies against recombinant U1-nRNP proteins was not significantly associated with any HLA DRB1, DQA1 and DQB1 allele in our group of SLE patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300249
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    C3-containing serum immune complexes in patients with systemic lupus erythematosus: correlation to disease activity and comparison with other rheumatic diseases (1989)
    Springer
    Rheumatology international 9 (1989), S. 59-64 
    Details
    ISSN: 1437-160X
    Keywords: Systemic lupus erythematosus ; Circulating immune complexes ; C3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Although testing for circulating immune complexes (CIC) is regarded as a useful, complementary, laboratory parameter in the differential diagnosis and management of immune complex-induced vasculitis syndromes, there is still an uncertainty with regard to assay systems used for the demonstration of soluble immune complexes. This is partly due to difficulties in the reproducibility, handling and principle limitations of available test systems for the assessment of soluble immune complexes in body fluids. In the present communication a modification of the anti-C3 test for the determination of CIC was developed using nitrocellulose as a solid phase matrix. IgG-, IgA- and IgM-containing CIC were determined and quantified using standard immune complex preparations. When 39 sera of SLE patients, 12 sera of patients with vascultis syndromes, 10 sera of rheumatoid arthritis patients and 11 sera of patients with ankylosing spondylitis were tested, predominantly IgG-containing CIC could be demonstrated. Only in SLE patients was a significant amount of other immunoglobulin isotypes detected in CIC. In these patients a significant difference of IgG-containing CIC levels was found with regard to patients with high and low disease activity (P〈0.0001). A significant correlation was also established between IgG-containing CIC and anti-dsDNA antibodies (P〈0.001). In a longitudinal study the isotypes in the isolated CIC were found to be constant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00270246
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Evaluation of plasma C3d and immune complex determinations in the assessment of disease activity of patients with rheumatoid arthritis, systemic lupus erythematosus, and spondylitis ancylopoetica (1985)
    Springer
    Rheumatology international 5 (1985), S. 97-101 
    Details
    ISSN: 1437-160X
    Keywords: C3d ; Serum immune complexes ; Rheumatoid arthritis ; Systemic lupus erythematosus ; Spondylitis ancylopoetica ; Disease activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Patients with rheumatoid arthritis, systemic lupus erythematosus, and spondylitis ancylopoetica were examined, along with healthy controls, for C3d plasma levels, circulating immune complexes, C3 serum levels, and CRP. Immune complexes were determined using a C1q binding assay, a 2.75% PEG precipitation technique, including the analysis of IgG and C3, and a new laser nephelometric latex test. C3d plasma levels were significantly (P〈1%) elevated in all groups of patients as compared to controls. With regard to the demonstration of circulating immune complexes, the PEG precipitation method discriminated best between patients and the control population. It was not possible to differentiate between the different disease entities with neither C3d serum levels or immune complexes. Concerning the assessment of disease activity, none of the evaluated parameters alone appears to be of clinical relevance. The individual application of more than one immune complex assay in combination with the measurement of C3d serum levels must be recommended if disease activity is to be assessed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541327
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    Paper (German National Licenses)
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