Biomaterial Database

The IgE antibody response to the phosphorylcholine hapten. 1987

K Blaser, and C H Heusser

Laboratory of Molecular Immunology, University of Berne, Switzerland.

The immune response to the phosphorylcholine (PC) hapten elicited by PC-keyhole limpet hemocyanin (KLH) is composed of 2 groups of antibodies with specificity to either PC or phenylphosphorylcholine which were designated as group I and II anti-PC antibodies, respectively. We demonstrate that anti-PC IgE antibody expression is restricted to group II antibodies and does not display the T15 idiotype. Accordingly anti-PC IgE antibodies recognize the same epitope (PC-phenyl) as IgG1, IgG2a and IgG2b antibodies which is different from that (PC) recognized by IgM and IgG3 antibodies. A monoclonal anti-PC IgE antibody, representing group II characteristics was established. From amino acid sequences of light chains of purified group I and II antibodies from serum as well as of monoclonal representatives thereof it appears that both populations are relatively homogenous and represent independent clonal expressions. Nevertheless the formation of anti-PC IgE antibodies in mice can be suppressed by isologous anti-T15 anti-idiotypic antiserum. This antiserum, however, crossreacts with different anti-PC antibodies including monoclonal group II anti-PC IgE antibodies and is composed of a large number of anti-idiotopes. An analyses performed with monoclonal anti-T15 idiotopes demonstrates that some but not all antibodies suppress the formation of anti-PC IgE. We conclude that syngeneically induced anti-idiotypic interactions may display regulation of a wide range of specificities affecting responses to various antigenic determinants.

UI	MeSH Term	Description	Entries
D007073	Immunoglobulin E	An immunoglobulin associated with MAST CELLS. Overexpression has been associated with allergic hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).	IgE
D007130	Immunoglobulin Idiotypes	Unique genetically-controlled determinants present on ANTIBODIES whose specificity is limited to a single group of proteins (e.g., another antibody molecule or an individual myeloma protein). The idiotype appears to represent the antigenicity of the antigen-binding site of the antibody and to be genetically codetermined with it. The idiotypic determinants have been precisely located to the IMMUNOGLOBULIN VARIABLE REGION of both immunoglobin polypeptide chains.	Idiotypes, Immunoglobulin,Ig Idiotypes,Idiotype, Ig,Idiotype, Immunoglobulin,Idiotypes, Ig,Ig Idiotype,Immunoglobulin Idiotype
D010767	Phosphorylcholine	Calcium and magnesium salts used therapeutically in hepatobiliary dysfunction.	Choline Chloride Dihydrogen Phosphate,Choline Phosphate Chloride,Phosphorylcholine Chloride,Choline Phosphate,Phosphocholine,Chloride, Choline Phosphate,Chloride, Phosphorylcholine,Phosphate Chloride, Choline,Phosphate, Choline
D002794	Choline	A basic constituent of lecithin that is found in many plants and animal organs. It is important as a precursor of acetylcholine, as a methyl donor in various metabolic processes, and in lipid metabolism.	Bursine,Fagine,Vidine,2-Hydroxy-N,N,N-trimethylethanaminium,Choline Bitartrate,Choline Chloride,Choline Citrate,Choline Hydroxide,Choline O-Sulfate,Bitartrate, Choline,Chloride, Choline,Choline O Sulfate,Citrate, Choline,Hydroxide, Choline,O-Sulfate, Choline
D006241	Haptens	Small antigenic determinants capable of eliciting an immune response only when coupled to a carrier. Haptens bind to antibodies but by themselves cannot elicit an antibody response.	Hapten,Contact-Sensitizing Agents,Agents, Contact-Sensitizing,Contact Sensitizing Agents
D006433	Hemocyanins	Metalloproteins that function as oxygen transport proteins in the HEMOLYMPH of MOLLUSKS and ARTHROPODS. They are characterized by two copper atoms, coordinated with HISTIDINE residues, that reversibly bind a single oxygen molecule; they do not contain HEME groups.	Hemocyanin,alpha-Haemocyanin,alpha-Hemocyanin,alpha-Hemocyanins,alpha Haemocyanin,alpha Hemocyanin,alpha Hemocyanins
D000917	Antibody Formation	The production of ANTIBODIES by proliferating and differentiated B-LYMPHOCYTES under stimulation by ANTIGENS.	Antibody Production,Antibody Response,Antibody Responses,Formation, Antibody,Production, Antibody,Response, Antibody,Responses, Antibody
D000918	Antibody Specificity	The property of antibodies which enables them to react with some ANTIGENIC DETERMINANTS and not with others. Specificity is dependent on chemical composition, physical forces, and molecular structure at the binding site.	Antibody Specificities,Specificities, Antibody,Specificity, Antibody