Biomaterial Database

Mechanism of binding of multivalent immune complexes to Fc receptors. 2. Kinetics of binding. 1981

S K Dower, and J A Titus, and C DeLisi, and D M Segal

The kinetics of association and dissociation of affinity cross-linked IgG oligomers with Fc receptors on P388D1 cells have been studied at 0 degrees C. For dimers prepared with two different affinity cross-linking reagents (DIBADL and BDPE) and also trimers and a heavy oligomer fraction prepared with BDPE, monomeric IgG accelerates the rate of dissociation of bound oligomer from the cells. This observation is consistent with a binding mechanism in which monovalently, and multivalently bound species are in rapid equilibrium with one another on the cell surface and in which the rate of formation of the divalently bound species is faster than the dissociation of the monovalent species from the cells. As predicted, the rates of dissociation of BDPE cross-linked oligomers decrease with size, and dimers (cross-linked with DIBADL) which can self-aggregate on the cell surface dissociate more slowly than nonaggregating (BDPE) dimers. The association and dissociation of oligomers with P388D1 cells proceed by parallel fast and slow processes, even with cells that bind dimers with a single affinity. The origin of this heterogeneity is not known but could arise from a fraction of receptors in environments with limited accessibility to bulk solution. The fast component of the association reaction is second order, and the rate-limiting step of this process is the formation of the monovalently bound intermediate from solution-phase oligomer.

UI	MeSH Term	Description	Entries
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
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D007941	Leukemia P388	An experimental lymphocytic leukemia originally induced in DBA/2 mice by painting with methylcholanthrene.	P388D(1) Leukemia,P388, Leukemia
D008433	Mathematics	The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Mathematic
D011961	Receptors, Fc	Molecules found on the surface of some, but not all, B-lymphocytes, T-lymphocytes, and macrophages, which recognize and combine with the Fc (crystallizable) portion of immunoglobulin molecules.	Fc Receptors,Fc Receptor,Receptor, Fc
D003432	Cross-Linking Reagents	Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other.	Bifunctional Reagent,Bifunctional Reagents,Cross Linking Reagent,Crosslinking Reagent,Cross Linking Reagents,Crosslinking Reagents,Linking Reagent, Cross,Linking Reagents, Cross,Reagent, Bifunctional,Reagent, Cross Linking,Reagent, Crosslinking,Reagents, Bifunctional,Reagents, Cross Linking,Reagents, Cross-Linking,Reagents, Crosslinking
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000936	Antigen-Antibody Complex	The complex formed by the binding of antigen and antibody molecules. The deposition of large antigen-antibody complexes leading to tissue damage causes IMMUNE COMPLEX DISEASES.	Immune Complex,Antigen-Antibody Complexes,Immune Complexes,Antigen Antibody Complex,Antigen Antibody Complexes,Complex, Antigen-Antibody,Complex, Immune,Complexes, Antigen-Antibody,Complexes, Immune
D046911	Macromolecular Substances	Compounds and molecular complexes that consist of very large numbers of atoms and are generally over 500 kDa in size. In biological systems macromolecular substances usually can be visualized using ELECTRON MICROSCOPY and are distinguished from ORGANELLES by the lack of a membrane structure.	Macromolecular Complexes,Macromolecular Compounds,Macromolecular Compounds and Complexes,Complexes, Macromolecular,Compounds, Macromolecular,Substances, Macromolecular
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus