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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. [5]
ACTA2 (actin alpha 2) is an actin protein with several aliases including alpha-actin, alpha-actin-2, aortic smooth muscle or alpha smooth muscle actin (α-SMA, SMactin, alpha-SM-actin, ASMA). Actins are a family of globular multi-functional proteins that form microfilaments .
The antibody with the higher affinity for a specific epitope will surpass antibodies with a lower affinity for the same epitope. [ 2 ] [ 3 ] By conjugating the antibody to a fluorophore , the position of the target biomolecule is visualized by exciting the fluorophore and measuring the emission of light in a specific predefined wavelength using ...
72 11468 Ensembl ENSG00000163017 ENSMUSG00000059430 UniProt P63267 P63268 RefSeq (mRNA) NM_001615 NM_001199893 NM_009610 RefSeq (protein) NP_001186822 NP_001606 NP_033740 Location (UCSC) Chr 2: 73.89 – 73.92 Mb Chr 6: 83.49 – 83.51 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Actin, gamma-enteric smooth muscle is a protein that in humans is encoded by the ACTG2 gene. Actins ...
Alpha-actinin-2 is a 103.8 kDa protein composed of 894 amino acids. [6] [7] Each molecule is rod-shaped (35 nm in length) and it homodimerizes in an anti-parallel fashion.. Each monomer has an N-terminal actin-binding region composed of two calponin homology domains, two C-terminal EF hand domains, and four tandem spectrin-like repeats form the rod domain in the central region of the molecule.
Type 1 autoimmune hepatitis. Positive antibodies include: [19] [20] Antinuclear antibody (ANA) Anti-smooth muscle antibody (ASMA) - 65% of people; Anti-actin antibodies; Anti-mitochondrial antibodies - rare except for overlap syndromes with primary biliary cholangitis; Anti-soluble liver antigen/liver pancreas antibody antigen - 20% of people
Together with the co-activation of the non-canonical EGFR pathway, these events lead to upregulation of the ACTA2 gene and subsequent alpha smooth muscle actin protein production. Several regulators of the myofibroblast differentiation pathway have been described, including hyaluronan and CD44 co-receptor activation of EGFR.