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Signaling via LTbetaR on the lamina propria stromal cells of the gut is required for IgA production. 2002

Hyung-Sik Kang, and Robert K Chin, and Yang Wang, and Ping Yu, and Jun Wang, and Kenneth A Newell, and Yang-Xin Fu
Department of Pathology and Committee on Immunology, The University of Chicago, 5841 S. Maryland, Chicago, IL 60637, USA.

Peyer's patches (PPs) and/or mesenteric lymph nodes (MLNs) are thought to be essential for immunoglobulin A (IgA) production. We found that the severe IgA deficiency in lymphotoxin-deficient (LT(-/-)) mice could be fully reversed by reconstitution with LT-expressing bone marrow, despite the absence of both LNs and PPs. The number of IgA precursors from LT(-/-) mice was not reduced, and they were able to migrate into the lamina propria (LP) of wild-type mice but not of LTbetaR(-/-) mice. Consistently, lymphoid tissue chemokines and adhesion molecules were reduced within the LP of LTalpha(-/-) and LTbetaR(-/-) mice. IgA deficiency in LTalpha(-/-) mice was reversed by the transplantation of a segment of RAG-1 (recombination-activating gene 1) deficient intestine, which confirmed the dispensability of the MLNs and PPs and the sufficiency of the LT-mediated gut microenvironment for IgA production.

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
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
D007422 Intestines The section of the alimentary canal from the STOMACH to the ANAL CANAL. It includes the LARGE INTESTINE and SMALL INTESTINE. Intestine
D008198 Lymph Nodes They are oval or bean shaped bodies (1 - 30 mm in diameter) located along the lymphatic system. Lymph Node,Node, Lymph,Nodes, Lymph
D008233 Lymphotoxin-alpha A tumor necrosis factor family member that is released by activated LYMPHOCYTES. Soluble lymphotoxin is specific for TUMOR NECROSIS FACTOR RECEPTOR TYPE I; TUMOR NECROSIS FACTOR RECEPTOR TYPE II; and TUMOR NECROSIS FACTOR RECEPTOR SUPERFAMILY, MEMBER 14. Lymphotoxin-alpha can form a membrane-bound heterodimer with LYMPHOTOXIN-BETA that has specificity for the LYMPHOTOXIN BETA RECEPTOR. TNF Superfamily, Member 1,TNF-beta,Tumor Necrosis Factor Ligand Superfamily Member 1,Tumor Necrosis Factor-beta,Lymphotoxin,Lymphotoxin-alpha3,Soluble Lymphotoxin-alpha,alpha-Lymphotoxin,Lymphotoxin alpha,Lymphotoxin alpha3,Lymphotoxin-alpha, Soluble,Soluble Lymphotoxin alpha,Tumor Necrosis Factor beta,alpha Lymphotoxin
D009088 Mucoproteins Conjugated proteins in which mucopolysaccharides are combined with proteins. The mucopolysaccharide moiety is the predominant group with the protein making up only a small percentage of the total weight.
D010581 Peyer's Patches Lymphoid tissue on the mucosa of the small intestine. Patches, Peyer's,Peyer Patches,Peyers Patches
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D002634 Chemotaxis, Leukocyte The movement of leukocytes in response to a chemical concentration gradient or to products formed in an immunologic reaction. Leukotaxis,Leukocyte Chemotaxis
D005260 Female Females

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