The effects of plastic bag extracts prepared in either mouse serum or phosphate-buffered saline with ethanol on mouse splenic cells.

Chemicals leached from plastic blood bags are potentially immunogenic when introduced parenterally into humans. The experiments reported here represent an attempt to sensitize B6C3F1 mice to parenteral injections of solutions used to extract potentially immunogenic material from plastic blood bags. Mice were given intraperitoneal injections: blood bag extracts prepared from phosphate-buffered saline and ethanol; mouse red cells stored in extract solution; or blood bag extracts prepared from mouse serum.

Immunoaffinity purification of tissue plasminogen activator from serum-supplemented conditioned media using monoclonal antibody.

Tissue plasminogen activator (tPA) was purified from serum-supplemented culture media in a single-step immunoaffinity chromatographic procedure. This was done by producing a monoclonal antibody to tissue plasminogen activator. The antibody is a murine IgG1, kappa light chain molecule.

18B1: an axon-specific antigen associated with many proteins.

We describe an antigen, 18B1, defined by a monoclonal antibody. Immunoperoxidase staining of brain sections shows that 18B1 is selectively associated with neurofilament-rich axons. Antibody staining of sodium dodecyl sulphate-gel blots, on the other hand, shows that 18B1 is associated with a large number of proteins, none of which are structural components of brain neurofilaments.

Monoclonal antibodies identify novel neural antigens.

Monoclonal antibodies (Mabs) were raised against synaptic plasma membranes from rat cerebellum. The hybridomas were screened with a solid-phase immunoassay, the positive lines were characterized by their immunoperoxidase staining pattern on cerebellum, and the specific polypeptide antigens were identified on protein blots. Among the Mabs described are some that stain only neurons or only glia and others that react with specific parts of cells, such as axons, dendrites, and synapses.