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Anti-nRNP is a type of antibody. [1] [2] ... Anti-nRNP antibodies can be elevated in mixed connective tissue disease. [4] See also. snRNP70; References
HLA-DR4 in the MHC is linked to both anti-RNP antibody responses and MCTD. [52] [53] The HLA class II phenotype/genotype most closely connected with scleroderma, HLA-DR5, and its subgroups, has been demonstrated to have a negative connection with MCTD. [54] [55] Another genetic feature of MCTD is the presence of anti-RNP antibodies.
Some disorders, such as systemic lupus erythematosus (SLE) may be more likely if several autoantibodies are present, while others, such as mixed connective tissue disease (MCTD) may be more likely if a single autoantibody, ribonucleic protein (RNP), is the only one present. Those who have more than one autoimmune disorder may have several ...
An extractable nuclear antigen panel, or an ENA panel, tests for presence of autoantibodies in the blood that react with proteins in the cell nucleus.It is usually done as a follow-up to a positive antinuclear antibody test and when one is showing symptoms of an autoimmune disorder.
Anti-histone antibodies are autoantibodies that are a subset of the anti-nuclear antibody family, which specifically target histone protein subunits or histone complexes. [1] They were first reported by Henry Kunkel , H.R. Holman, and H.R.G. Dreicher in their studies of cellular causes of lupus erythematosus in 1959–60.
Anti-RNP antibodies are autoantibodies associated with mixed connective tissue disease and are also detected in nearly 40% of Lupus erythematosus patients. Two types of anti-RNP antibodies are closely related to Sjögren's syndrome: SS-A (Ro) and SS-B (La). Autoantibodies against snRNP are called Anti-Smith antibodies and are specific for SLE ...
Anti-Scl-70 (also called anti-topoisomerase I after the type I topoisomerase target [1]) is an anti-topoisomerase antibody-type of anti-nuclear autoantibodies, seen mainly in diffuse systemic scleroderma (with a sensitivity of 28–70%), but is also seen in 10–18% of cases of the more limited form of systemic scleroderma called CREST syndrome. [2]
Reference ranges often depend on the analytical method used, for reasons such as inaccuracy, lack of standardisation, lack of certified reference material and differing antibody reactivity. [11] Also, reference ranges may be inaccurate when the reference groups used to establish the ranges are small.