Biomaterial Database

Secretory component is bound to the paraproteins in sera of IgA and IgM gammopathies. 1992

J P Bouvet, and H Hocini, and S Iscaki

Unité d'Immunologie Microbienne, Institut Pasteur, Paris, France.

Secretory immunoglobulins A (SIgA) and M (SIgM) were investigated in 20 sera containing high levels of monoclonal polymeric IgM or IgA. In the sera of patients suffering from Waldenström's macroglobulinemia (WM), the level of SIgA was found to be low, whereas that of SIgM was extremely high. Reciprocally, in the multiple myeloma (MM) patients, SIgA were increased and SIgM were dramatically decreased. Electrophoretic analysis showed these SIgA and SIgM to have the same monoclonal pattern as the corresponding paraprotein. Hence these molecules must originate from the malignant clone. The most likely mechanism involved is an intravascular formation of the secretory-like immunoglobulins. Free secretory component (SC) could diffuse passively from the digestive lumen and bind the circulating myeloma polymeric immunoglobulins. Such a possibility of in vivo binding of free SC to IgM and IgA polymers leads to a reconsideration of the secretory origin of SIgM and SIgA in normal human serum.

UI	MeSH Term	Description	Entries
D007070	Immunoglobulin A	Represents 15-20% of the human serum immunoglobulins, mostly as the 4-chain polymer in humans or dimer in other mammals. Secretory IgA (IMMUNOGLOBULIN A, SECRETORY) is the main immunoglobulin in secretions.	IgA,IgA Antibody,IgA1,IgA2,Antibody, IgA
D007075	Immunoglobulin M	A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin.	Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D008258	Waldenstrom Macroglobulinemia	A lymphoproliferative disorder characterized by pleomorphic B-LYMPHOCYTES including PLASMA CELLS, with increased levels of monoclonal serum IMMUNOGLOBULIN M. There is lymphoplasmacytic cells infiltration into bone marrow and often other tissues, also known as lymphoplasmacytic lymphoma. Clinical features include ANEMIA; HEMORRHAGES; and hyperviscosity.	Lymphoma, Lymphoplasmacytoid,Macroglobulinemia,Familial Waldenstrom's Macroglobulinaemia,Lymphoma, Lymphocytic, Plasmacytoid,Primary Macroglobulinemia,Waldenstrom's Macroglobulinaemia,Waldenstrom's Macroglobulinemia,Familial Waldenstrom Macroglobulinaemia,Familial Waldenstroms Macroglobulinaemia,Lymphomas, Lymphoplasmacytoid,Lymphoplasmacytoid Lymphoma,Lymphoplasmacytoid Lymphomas,Macroglobulinaemia, Familial Waldenstrom's,Macroglobulinaemia, Waldenstrom's,Macroglobulinemia, Primary,Macroglobulinemia, Waldenstrom,Macroglobulinemia, Waldenstrom's,Waldenstrom Macroglobulinaemia,Waldenstrom's Macroglobulinaemia, Familial,Waldenstroms Macroglobulinaemia,Waldenstroms Macroglobulinemia
D009101	Multiple Myeloma	A malignancy of mature PLASMA CELLS engaging in monoclonal immunoglobulin production. It is characterized by hyperglobulinemia, excess Bence-Jones proteins (free monoclonal IMMUNOGLOBULIN LIGHT CHAINS) in the urine, skeletal destruction, bone pain, and fractures. Other features include ANEMIA; HYPERCALCEMIA; and RENAL INSUFFICIENCY.	Myeloma, Plasma-Cell,Kahler Disease,Myeloma, Multiple,Myeloma-Multiple,Myelomatosis,Plasma Cell Myeloma,Cell Myeloma, Plasma,Cell Myelomas, Plasma,Disease, Kahler,Multiple Myelomas,Myeloma Multiple,Myeloma, Plasma Cell,Myeloma-Multiples,Myelomas, Multiple,Myelomas, Plasma Cell,Myelomas, Plasma-Cell,Myelomatoses,Plasma Cell Myelomas,Plasma-Cell Myeloma,Plasma-Cell Myelomas
D010266	Paraproteins	Abnormal immunoglobulins synthesized by atypical cells of the MONONUCLEAR PHAGOCYTE SYSTEM. Paraproteins containing only light chains lead to Bence Jones paraproteinemia, while the presence of only atypical heavy chains leads to heavy chain disease. Most of the paraproteins show themselves as an M-component (monoclonal gammopathy) in electrophoresis. Diclonal and polyclonal paraproteins are much less frequently encountered.	Paraprotein
D011485	Protein Binding	The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments.	Plasma Protein Binding Capacity,Binding, Protein
D004586	Electrophoresis	An electrochemical process in which macromolecules or colloidal particles with a net electric charge migrate in a solution under the influence of an electric current.	Electrophoreses
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006942	Hypergammaglobulinemia	An excess of GAMMA-GLOBULINS in the serum due to chronic infections or PARAPROTEINEMIAS.	Hyperimmunoglobulinemia,Hypergammaglobulinemias,Hyperimmunoglobulinemias
D012635	Secretory Component	The extracellular moiety of the POLYMERIC IMMUNOGLOBULIN RECEPTOR found alone or complexed with IGA or IGM, in a variety of external secretions (tears, bile, colostrum.) Secretory component is derived by proteolytic cleavage of the receptor during transcytosis. When immunoglobulins IgA and IgM are bound to the receptor, during their transcytosis secretory component becomes covalently attached to them generating SECRETORY IMMUNOGLOBULIN A or secretory IMMUNOGLOBULIN M.	Secretory Piece