Synthesis and secretion of IgA, IgM, and IgG by peripheral blood mononuclear cells in human disease states, by isolated human intestinal mononuclear cells, and by human bone marrow mononuclear cells from ribs. 1983

R P MacDermott, and M G Beale, and C D Alley, and G S Nash, and M J Bertovich, and M J Bragdon

We have examined the secretion of IgA, IgM, and IgG by isolated human intestinal MNC, human bone marrow MNC from rib specimens, and peripheral blood MNC from patients with CD, UC, SLE, and HSP. "Normal" control intestinal MNC exhibited high spontaneous secretion of IgA, whereas intestinal MNC from UC and CD patients exhibited only modest increases in IgA secretion. Peripheral blood MNC from patients with CD, UC, SLE, and HSP exhibited markedly elevated spontaneous secretion of immunoglobulins in general and IgA in particular. Pure human bone marrow MNC exhibited high spontaneous secretion of IgA with modest amounts of IgG and normal IgM being secreted. The addition of PWM to cultures in which high spontaneous synthesis and secretion of immunoglobulins was seen, resulted in no further enhancement, and in some instances suppression, of antibody secretion. In patients with autoimmune disease, there appeared to be dual immunoregulatory defects, one involving a lack of normal T-suppressor cell functional capabilities for spontaneous antibody synthesis, and the other the presence of PWM activable T-suppressor cells. In human bone marrow, we have identified MNC that secrete suppressor factors in the presence of PWM and that are capable of inhibiting antibody synthesis and secretion. Column separation using Sephacryl S-300 revealed that the IgA secreted by "normal" control intestinal MNC is predominantly dimeric, whereas the IgA secreted by human bone marrow MNC is predominantly monomeric. Furthermore, mucosal MNC from patients with CD and uninvolved intestine from patients with UC exhibited patterns similar to control intestinal MNC, being predominantly dimeric IgA with some monomeric IgA secreted. By contrast, intestinal MNC from patients with UC had a decreased proportion of dimeric IgA and increased proportion of monomeric IgA, thus indicating that IgA precursor B-cells may have migrated into the intestine from extraintestinal sites, or that the normal dimeric IgA-secreting cells in the intestine had begun secreting increased proportion of monomeric IgA as well. These studies indicate that homing patterns and/or immunoregulation of IgA-secreting cells are altered in human intestine, bone marrow, and autoimmune disease states.

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
D007074 Immunoglobulin G The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B. Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
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
D007136 Immunoglobulins Multi-subunit proteins which function in IMMUNITY. They are produced by B LYMPHOCYTES from the IMMUNOGLOBULIN GENES. They are comprised of two heavy (IMMUNOGLOBULIN HEAVY CHAINS) and two light chains (IMMUNOGLOBULIN LIGHT CHAINS) with additional ancillary polypeptide chains depending on their isoforms. The variety of isoforms include monomeric or polymeric forms, and transmembrane forms (B-CELL ANTIGEN RECEPTORS) or secreted forms (ANTIBODIES). They are divided by the amino acid sequence of their heavy chains into five classes (IMMUNOGLOBULIN A; IMMUNOGLOBULIN D; IMMUNOGLOBULIN E; IMMUNOGLOBULIN G; IMMUNOGLOBULIN M) and various subclasses. Globulins, Immune,Immune Globulin,Immune Globulins,Immunoglobulin,Globulin, Immune
D007413 Intestinal Mucosa Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI. Intestinal Epithelium,Intestinal Glands,Epithelium, Intestinal,Gland, Intestinal,Glands, Intestinal,Intestinal Gland,Mucosa, Intestinal
D008180 Lupus Erythematosus, Systemic A chronic, relapsing, inflammatory, and often febrile multisystemic disorder of connective tissue, characterized principally by involvement of the skin, joints, kidneys, and serosal membranes. It is of unknown etiology, but is thought to represent a failure of the regulatory mechanisms of the autoimmune system. The disease is marked by a wide range of system dysfunctions, an elevated erythrocyte sedimentation rate, and the formation of LE cells in the blood or bone marrow. Libman-Sacks Disease,Lupus Erythematosus Disseminatus,Systemic Lupus Erythematosus,Disease, Libman-Sacks,Libman Sacks Disease
D011487 Protein Conformation The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain). Conformation, Protein,Conformations, Protein,Protein Conformations
D011695 IgA Vasculitis A systemic non-thrombocytopenic purpura caused by HYPERSENSITIVITY VASCULITIS and deposition of IGA-containing IMMUNE COMPLEXES within the blood vessels throughout the body, including those in the kidney (KIDNEY GLOMERULUS). Clinical symptoms include URTICARIA; ERYTHEMA; ARTHRITIS; GASTROINTESTINAL HEMORRHAGE; and renal involvement. Most cases are seen in children after acute upper respiratory infections. Allergic Purpura,Anaphylactoid Purpura,Henoch Purpura,Henoch-Schoenlein Purpura,Purpura Hemorrhagica,Purpura, Nonthrombocytopenic,Purpura, Schoenlein-Henoch,Rheumatoid Purpura,Schoenlein-Henoch Purpura,Vasculitis, Hemorrhagic,Henoch Schonlein Purpura,Henoch-Schonlein Purpura,Purpura, Nonthrombopenic,Purpura, Schonlein-Henoch,Hemorrhagic Vasculitis,Hemorrhagica, Purpura,Henoch Schoenlein Purpura,Henoch Schonlein Purpuras,Henoch-Schonlein Purpuras,Nonthrombocytopenic Purpura,Nonthrombopenic Purpura,Nonthrombopenic Purpuras,Purpura, Allergic,Purpura, Anaphylactoid,Purpura, Henoch,Purpura, Henoch Schonlein,Purpura, Henoch-Schoenlein,Purpura, Henoch-Schonlein,Purpura, Rheumatoid,Purpura, Schoenlein Henoch,Purpura, Schonlein Henoch,Purpuras, Henoch Schonlein,Purpuras, Henoch-Schonlein,Purpuras, Nonthrombopenic,Purpuras, Schonlein-Henoch,Schoenlein Henoch Purpura,Schonlein Purpura, Henoch,Schonlein Purpuras, Henoch,Schonlein-Henoch Purpura,Schonlein-Henoch Purpuras,Vasculitis, IgA
D001853 Bone Marrow The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells. Marrow,Red Marrow,Yellow Marrow,Marrow, Bone,Marrow, Red,Marrow, Yellow
D001854 Bone Marrow Cells Cells contained in the bone marrow including fat cells (see ADIPOCYTES); STROMAL CELLS; MEGAKARYOCYTES; and the immediate precursors of most blood cells. Bone Marrow Cell,Cell, Bone Marrow,Cells, Bone Marrow,Marrow Cell, Bone,Marrow Cells, Bone

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