The IgA subclass responses of human lymphocytes to B-cell activators
Abstract:
The induction of IgA synthesis in normal peripheral blood lymphocytes cultured in the presence of 5 different B-cell activators was studied by immunofluorescence using monoclonal antibodies to the two subclasses. The surface phenotype of normal cells after overnight culture in the absence of mitogen showed a mean ratio IgA1:IgA2 of 2.7:1; cells with cytoplasmic IgA were very rare. Results obtained on different donors after stimulation showed considerable variation; IgA1 was the predominant subclass in Epstein-Barr virus-stimulated cultures, whereas pokeweed mitogen induced a predominantly IgA2 response; cells stimulated with Staphylococcus aureus, Branhamella catarrhalis and lipopolysaccharide and unstimulated cells showed a 1:1 ratio of the subclasses. It is concluded that in this system IgA subclass expression is a function of the activator employed.
More Related Videos
06:15Characterization of Thymus-dependent and Thymus-independent Immunoglobulin Isotype Responses in Mice Using Enzyme-linked Immunosorbent Assay
Published on: September 7, 2018
08:25Unraveling Key Players of Humoral Immunity: Advanced and Optimized Lymphocyte Isolation Protocol from Murine Peyer's Patches
Published on: November 21, 2018
Related Concept Videos
Cell-mediated Immune Responses
Cells of the Adaptive Immune Response
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
B Cell Activation and Differentiation
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
