title: Effect of immunoglobulins and IgG-fragments on the human erythrocyte aggregation, studied by a rheoscope combined with image analyzer.
abstract: Using a rheoscope, combined with a TV image analyzer and a computer, the effects of immunoglobulins and IgG-fragments on the process of human erythrocyte aggregation were determined. The immunoglobulins accelerated the aggregation; the effect increased with their molecular weight, i.e., IgG congruent to gamma-globulin less than IgA less than IgM. An empirical relationship, expressing the dependence on the immunoglobulin concentrations, was proposed. F(ab')2-fragment accelerated the aggregation, more effectively than IgG, while Fab- and Fc-fragments did not. Therefore, two Fab-portions are presumably needed to form the aggregates, and the flexibility between two Fab-portions may be important. A case of multiple myeloma showed an increased aggregation, due to the increased myeloma protein.
mesh_terms: D004903:Erythrocyte Aggregation / Q000187:drug effects; D006801:Humans; D007070:Immunoglobulin A / Q000502:physiology; D007140:Immunoglobulin Fab Fragments; D007141:Immunoglobulin Fc Fragments; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G / Q000502:physiology; D007075:Immunoglobulin M / Q000502:physiology; D007136:Immunoglobulins / Q000502:physiology*; D009101:Multiple Myeloma / Q000097:blood; D009194:Myeloma Proteins / Q000494:pharmacology; D005719:gamma-Globulins / Q000494:pharmacology
chemical_list: D007070:Immunoglobulin A; D007140:Immunoglobulin Fab Fragments; D007141:Immunoglobulin Fc Fragments; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007136:Immunoglobulins; D009194:Myeloma Proteins; D005719:gamma-Globulins