Serological precipitation method for studying biosynthesis and secretion of immunoglobulins by human peripheral blood lymphocytes

A short-term-culture ELISA system to detect IgG and autoantibody synthesis by human lymphocytes

A simple combined culture and assay system for small numbers of human lymphocytes is described which permits rapid detection of immunoglobulin adherent to 96-well plates after 18 h culture, by means of an enzyme-linked immunosorbent assay (ELISA). The method is capable of detecting thyroglobulin antibody secreted by cells obtained from fine needle aspiration of the thyroid and therefore allows investigation of B cells activated in vivo from different sites by quantitation of the amount of immunoglobulin or antibody secreted.

A new solid-phase radioimmunoassay to measure IgG secreted by cultured human lymphocytes

We describe a simple solid-phase radioimmunoassay (RIA) to detect IgG based on competitive binding between radiolabeled and unlabeled IgG for anti-IgG antibody physically adsorbed to the wells of polyvinyl microtiter plates. The assay is sensitive (1 ng), rapid, and is particularly suited for studies of in vitro IgG secretion by human peripheral blood lymphocytes, since such studies require large numbers of cultures. Conditions which permit measurement, by means of this assay, of helper and suppressor T cell effects on IgG production by human B cells in culture are described.