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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]
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]
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.
Beta-2 comprises C3 (complement protein 3). It is raised in the acute phase response. Depression of C3 occurs in autoimmune disorders as the complement system is activated and the C3 becomes bound to immune complexes and removed from serum. Fibrinogen, a beta-2 protein, is found in normal plasma but absent in normal serum.
Rheumatoid factor, cryoglobulins, direct antiglobulin test, and cold agglutinin titer results can be positive. Beta-2 microglobulin and C-reactive protein test results are not specific for Waldenström macroglobulinemia. Beta-2 microglobulin is elevated in proportion to tumor mass. Coagulation abnormalities may be present.
Reference ranges (reference intervals) for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples. Reference ranges for blood tests are studied within the field of clinical chemistry (also known as "clinical biochemistry", "chemical pathology" or "pure blood chemistry"), the ...