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This assay can be quantitative or semi-quantitative, allowing for estimations of the levels of anti-dsDNA antibodies. This test can produce false positives due to contamination of ssDNA from denatured dsDNA. EIA detects low and high avidity anti-dsDNA antibodies, increasing its sensitivity and reducing its specificity. [1]
Anti-double stranded DNA (anti-dsDNA) antibodies are highly associated with SLE. They are a very specific marker for the disease, with some studies quoting nearly 100%. [8] Data on sensitivity ranges from 25 to 85%. Anti-dsDNA antibody levels, known as titres, correlate with disease activity in SLE; high levels indicate more active lupus.
The anti-dsDNA antibody titers also tend to reflect disease activity, although not in all cases. [13] Other ANA that may occur in people with SLE are anti-U1 RNP (which also appears in systemic sclerosis and mixed connective tissue disease), SS-A (or anti-Ro) and SS-B (or anti-La; both of which are more common in Sjögren's syndrome). SS-A and ...
For instance, up to 80% of those with SLE will have a positive double strand anti-double stranded DNA (anti-dsDNA) autoantibody test, but only about 25–30% will have a positive RNP. Some individuals who do have an autoimmune disorder will have negative autoantibody test results, but at a later date – as the disorder progresses - the ...
Anti-GBM antibodies Confirmed 1 per million people [46] IgA nephropathy: Kidneys: IgA autoantibodies Confirmed 3.5 per 100,000 [47] Membranous nephropathy: Kidneys: Anti-PLA2R antibodies Confirmed 10 per 100,000 [48] Lupus nephritis: Kidneys: Anti-dsDNA, Anti-Sm, Anti-nuclear antibodies Confirmed Up to 60% of those with Lupus [49] Interstitial ...
These autoantibodies, none of which are present in all cases of SLE, include the: a) antinuclear (i.e., ANA) and anti-dsDNA antibodies; b) anti-Sm, anti-RNP, anti-SSA, and anti–SS-B antibodies (anti-SSA and anti-SS-B antibodies are associated with less severe forms of cSLE); [30]) c) antiphospholipid autoantibodies including the lupus ...
the presence of anti-dsDNA, anti-Sm and anti-cardiolipin autoantibodies correlates with the development of systemic lupus erythematosus in particular. [ 19 ] The rate of progression is higher in the first five years following the onset of the disease and tends to decrease over time.
Anti-histone antibodies can be clinically detected using an ELISA assay. A blood sample is required for the test. [9] [5] Indirect immunofluorescence can also be used to detect anti-histone antibodies. Homogeneous, diffuse staining indicates the presence of anti-histone antibodies, chromatin, and some double-stranded DNA. [4]