Lymphocyte surface immunoglobulins

Area of Science:

• Immunology
• Cell Biology

Background:

• B lymphocytes possess two types of membrane immunoglobulins, one resembling IgM and another with a distinct heavy chain.
• T lymphocytes have one type of surface immunoglobulin with heavy chains similar but not identical to mu chains.

Purpose of the Study:

• To investigate the function of surface immunoglobulins on B and T lymphocytes.
• To determine if surface immunoglobulins act as antigen receptors.

Main Methods:

• Isolation of immunoglobulins from lymphocyte surfaces.
• Electrophoretic analysis of immunoglobulin heavy and light chains.
• Antigen binding studies with activated lymphocytes.

Main Results:

• Surface immunoglobulins on both B and T lymphocytes were identified and characterized.
• Evidence suggests that surface immunoglobulins on B cells and activated T cells can specifically bind to antigens.
• This binding indicates a potential role as an antigen receptor.

Conclusions:

• Surface immunoglobulin functions as an antigen receptor on B cells.
• Surface immunoglobulin also acts as an antigen receptor on at least some T cells.
• The precise mechanisms by which antigen binding initiates lymphocyte differentiation require further investigation.