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As IgM, IgG or IgA; As β 2-glycoprotein dependent or independent In autoimmune disease, ACA are beta-2 glycoprotein dependent; In syphilis, ACA [1] are beta-2 glycoprotein independent and can be assayed using the Venereal Disease Research Laboratory test
In autoimmune disease, anti-apolipoprotein H (AAHA) antibodies, also called anti-β 2 glycoprotein I antibodies, comprise a subset of anti-cardiolipin antibodies and lupus anticoagulant. These antibodies are involved in sclerosis and are strongly associated with thrombotic forms of lupus. [ 1 ]
β 2-glycoprotein 1, also known as beta-2 glycoprotein 1 and Apolipoprotein H (Apo-H), is a 38 kDa multifunctional plasma protein that in humans is encoded by the APOH gene. [5] One of its functions is to bind cardiolipin. When bound, the structure of cardiolipin and β 2-GP1 both undergo large changes in structure. [6]
Antiphospholipid syndrome is known for causing arterial or venous blood clots, in any organ system, and pregnancy-related complications.While blood clots and pregnancy complications are the most common and diagnostic symptoms associated with APS, other organs and body parts may be affected like platelet levels, heart, kidneys, brain, and skin.
The syphilis anti-cardiolipin antibodies are beta-2 glycoprotein independent, [2] whereas those that occur in antiphospholipid syndrome (associated to lupus for example) are beta-2 glycoprotein dependent, and this can be used to tell them apart in an ELISA assay. [3]
The antigen receptor of T cells is the T-cell receptor (TCR), which is composed of two chains, either the TCR-alpha and -beta chains, or the TCR-delta and gamma chains. All TCR chains contain two Ig domains in the extracellular portion; one IgV domain at the N-terminus and one IgC1 domain adjacent to the cell membrane .
Increased beta-1 protein due to the increased level of free transferrin is typical of iron deficiency anemia, pregnancy, and oestrogen therapy. Increased beta-1 protein due to LDL elevation occurs in hypercholesterolemia. Decreased beta-1 protein occurs in acute or chronic inflammation. [citation needed] Beta-2 comprises C3 (complement protein ...
ABO(H) blood group antigens are also carried by other hemostatically relevant glycoproteins, such as platelet glycoprotein Ibα, which is a ligand for vWF on platelets. [57] The significance of ABO(H) antigen expression on these other hemostatic glycoproteins is not fully defined, but may also be relevant for bleeding and thrombosis.
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