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Anti-dsDNA antibodies are a heterogeneous group of antibodies, quite specific for SLE. Their variability is related to the assay used, the immunoglobulin class secondary antibody, and the dsDNA source. The standardization of measuring anti-dsDNA antibodies is still poor and different methods yield different results. Several novel technologies were developed during the last decades that represent viable...
Anti-nuclear antibody (ANA) positivity suggests CTD but can also lead to a diagnosis of UCTD when a patient does not fulfill the CTD diagnostic criteria. An anti-dense fine speckled (DFS) immunofluorescence (IIF) pattern can be observed when using an ANA test on HEp-2 cells and is due to the presence of antibodies to the nuclear DFS70 antigen that has rarely found in CTD. Serological testing for anti-DFS70...
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