Antibody-targeted delivery of doxorubicin entrapped in sterically stabilized liposomes can eradicate lung cancer in mice.Cancer chemotherapy is limited by adverse side effects resulting from toxicities to normal tissues. Targeted delivery of drugs to diseased tissues in vivo would help to reduce these side effects. Liposomes containing lipid derivatives of polyethylene glycol have circulation times sufficiently long to allow for effective in vivo drug delivery. Polyethylene glycol liposomes, containing entrapped doxorubicin, targeted to KLN-205 squamous cell carcinoma of the lung by means of specific antibodies attached at the liposome surface were capable of reducing tumor burden to a high degree and eradicating tumor in a significant percentage of mice.
Summary Report on the ISOBM TD-4 Workshop: Analysis of 56 Monoclonal Antibodies against the MUC1 MucinEfficient generation in vitro, from human peripheral blood cells, of monoclonal Epstein-Barr virus transformants producing specific antibody to a variety of antigens without prior deliberate immunization.Larry Winger, Caroline M. Winger, Padma Shastry et al.|Proceedings of the National Academy of Sciences|1983 This paper describes a simple protocol for the efficient generation of large numbers of human monoclonal antibody-producing cells. This system is based on initial limiting-dilution culture after Epstein-Barr virus exposure of highly enriched precursors selected from peripheral blood mononuclear cells. Precursors can be enriched by using rosetting or panning approaches. Antibodies to erythrocytes, a mouse mammary carcinoma, DNA, and sperm antigens, produced without any deliberate immunization, are described. Large-scale human monoclonal antibody production may be facilitated by a combination of this protocol with a human cellular fusion system. For efficient precursor analysis and short-term (2 months or more) monoclonal antibody production, however, the system described here may be sufficient.
The identification, isolation and characterization of a 67 kilodalton, PNA-reactive autoantigen commonly expressed in human adenocarcinomas.In an attempt to characterize a Peanut Agglutinin (PNA) autoantigen widely expressed in common human adenocarcinomas, monoclonal antibodies (MAbs) were made against PNA-affinity purified glycoproteins from pooled breast cancer membrane biopsy materials. Two IgM MAbs, 167H.1 and 167H.4, were found to react strongly with frozen tissue sections of various adenocarcinomas and the antigen was characterized further. By immunoprecipitation, western blotting, and gel filtration, both MAbs were found to react with a 67 kilodalton (kD) antigen. The 67 kD antigen was purified and determined to be specifically PNA reactive and naturally occurring antibodies were demonstrated to the purified antigen. In conclusion, the 167H.1 and 167H.4 MAbs identify a non-mucinous, PNA-reactive autoantigen widely expressed in human adenocarcinomas.
Further evidence for the existence of ‘homing’ receptors on murine leukemia cells which mediate adherence to normal bone marrow stromal cells