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Anti-smooth muscle antibodies are antibodies (immunoglobulins) formed against smooth muscle. These antibodies are typically associated with autoimmune hepatitis. [1] [2] These antibodies can be directed against actin, troponin, and tropomyosin. [3]
In coeliac disease, anti-actin antibody levels correlate with the level of intestinal damage. [ 2 ] [ 3 ] In autoimmune hepatitis , anti-actin antibody levels correlate with patterns of immune recognition, [ 4 ] the pattern of recognition was specific to a small percentage of autoimmune hepatitis type 1 or cryptogenic hepatitis patients.
A number of specific antibodies found in the blood (antinuclear antibody (ANA), anti-smooth muscle antibody (SMA), anti-liver kidney microsomal antibodies (LKM-1, LKM-2, LKM-3), anti soluble liver antigen (SLA), liver–pancreas antigen (LP), and anti-mitochondrial antibody (AMA)) are of use, as is finding an increased immunoglobulin G level.
Anti-neutrophil cytoplasmic antibody: c-ANCA: proteins in neutrophil cytoplasm: granulomatosis with polyangiitis: p-ANCA: neutrophil perinuclear: microscopic polyangiitis, eosinophilic granulomatosis with polyangiitis, systemic vasculitides (non-specific) Rheumatoid factor: IgG: rheumatoid arthritis: Anti-smooth muscle antibody: smooth muscle ...
Anti-mitochondrial antibodies (AMA) are autoantibodies, consisting of immunoglobulins formed against mitochondria, [1] primarily the mitochondria in cells of the liver.. The presence of AMA in the blood or serum of a person may be indicative of the presence of, or the potential to develop, the autoimmune disease primary biliary cholangitis (PBC; previously known as primary biliary cirrhosis).
Antinuclear antibodies and anti-smooth muscle antibody are found in 20–50% of PSC patients, and likewise are not specific for the disease, but may identify a subgroup of PSC patients who also have autoimmune hepatitis (i.e. PSC-AIH overlap syndrome). [4]
Scientists have discovered an antibody treatment that may help prevent both muscle loss and bone density loss in people using GLP-1 drugs such as Ozempic and Wegovy after losing weight.
Statin-associated autoimmune myopathy (SAAM), also known as anti-HMGCR myopathy, is a very rare form of muscle damage caused by the immune system in people who take statin medications. [1] However, there are cases of SAAM in patients who have not taken statin medication, and this can be explained by the exposure to natural sources of statin ...