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Immunoglobulin M (IgM) is the largest of several isotypes of antibodies (also known as immunoglobulin) that are produced by vertebrates. IgM is the first antibody to appear in the response to initial exposure to an antigen ; [ 1 ] [ 2 ] causing it to also be called an acute phase antibody.
Immune tolerance in pregnancy or maternal immune tolerance is the immune tolerance shown towards the fetus and placenta during pregnancy. This tolerance counters the immune response that would normally result in the rejection of something foreign in the body, as can happen in cases of spontaneous abortion .
Cold agglutinin disease (CAD) is a rare autoimmune disease characterized by the presence of high concentrations of circulating cold sensitive antibodies, usually IgM and autoantibodies that are also active at temperatures below 30 °C (86 °F), [1] directed against red blood cells, causing them to agglutinate and undergo lysis. [2]
Routine antenatal antibody screening blood tests (indirect Coombs test) do not screen for ABO HDN. [citation needed] If IgG anti-A or IgG anti-B antibodies are found in the pregnant woman's blood, they are not reported with the test results, because they do not correlate well with ABO HDN.
Anti-core antibodies (anti-HBc) are the first antibodies produced by the body, first in short-term IgM (anti-HBc IgM), and subsequently in long-term IgG; while levels of IgM anti-HBc will peak around sixteen weeks after exposure and fall within about seven to eight months, [63] [64] IgG anti-HBc will remain detectable in the serum as a sign of ...
Individuals with CBL-MZ commonly present with: B-cell blood counts that are extremely high (>4.0x10 9; range 3.0x10 9 /L to 37.1x10 9 /L);, [6] represent a large percentage of cases that would otherwise be designated as non-CLL/SLL MLB; [2] often have an IgM monoclonal gammopathy, i.e. high blood levels of a monoclonal IgM antibody; and in ...
Common variable immunodeficiency (CVID) is an inborn immune disorder characterized by recurrent infections and low antibody levels, specifically in immunoglobulin (Ig) types IgG, IgM, and IgA. [2] Symptoms generally include high susceptibility to pathogens, chronic lung disease , as well as inflammation and infection of the gastrointestinal tract.
In addition it was recently described that hypomorphic mutations in the B-cell receptor (BLNK & BTK) lead to selective IgM deficiency. [ 4 ] It is however puzzling that class switching seems to happen normally (serum levels of other antibodies are normal), while dysfunctioning of IgM synthesis is expected to occur together with abnormalities in ...