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  2. Hypergammaglobulinemia - Wikipedia

    en.wikipedia.org/wiki/Hypergammaglobulinemia

    It does this by binding to its ligand, CD40, which is found expressed on the surface of B cells. [4] The mutation in the TNFSF5 gene causes there to be no recognition of CD40 by CD40 ligand, and thus the T cells do not induce Ig class switching in B cells, so there are markedly reduced levels of IgG, IgA, and IgE, but have normal or elevated ...

  3. Immunoglobulin A - Wikipedia

    en.wikipedia.org/wiki/Immunoglobulin_A

    The high prevalence of IgA in mucosal areas is a result of a cooperation between plasma cells that produce polymeric IgA (pIgA), and mucosal epithelial cells that express polymeric immunoglobulin receptor (pIgR). [15]

  4. Serum protein electrophoresis - Wikipedia

    en.wikipedia.org/wiki/Serum_protein_electrophoresis

    The gamma globulins may be elevated (hypergammaglobulinemia), decreased (hypogammaglobulinaemia), or have an abnormal peak or peaks. Note that immunoglobulins may also be found in other zones; IgA typically migrates in the beta-gamma zone, and in particular, pathogenic immunoglobulins may migrate anywhere, including the alpha regions.

  5. Antibody - Wikipedia

    en.wikipedia.org/wiki/Antibody

    Each antibody binds to a specific antigen in a highly specific interaction analogous to a lock and key.. An antibody (Ab) or immunoglobulin (Ig) is a large, Y-shaped protein belonging to the immunoglobulin superfamily which is used by the immune system to identify and neutralize antigens such as bacteria and viruses, including those that cause disease.

  6. Wiskott–Aldrich syndrome - Wikipedia

    en.wikipedia.org/wiki/Wiskott–Aldrich_syndrome

    Typically, IgM levels are low, IgA levels are elevated, and IgE levels may be elevated; paraproteins are occasionally observed. [16] Skin immunologic testing (allergy testing) may reveal hyposensitivity. Individuals with Wiskott–Aldrich syndrome however are at higher risk for severe food allergies. [17]

  7. Immunoglobulin M - Wikipedia

    en.wikipedia.org/wiki/Immunoglobulin_M

    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.

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  9. Anti-gliadin antibodies - Wikipedia

    en.wikipedia.org/wiki/Anti-gliadin_antibodies

    The IgG antibody is similar to AGA IgA, but is found at higher levels in patients with the IgA-less phenotype. It is also associated with coeliac disease and non-celiac gluten sensitivity. [5] [6] [7] Anti-gliadin antibodies are frequently found with anti-transglutaminase antibodies.