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Immunotherapy in nude mice of human hepatoma using monoclonal antibodies against hepatitis B virus. 1982

D Shouval, and D A Shafritz, and V R Zurawski, and K J Isselbacher, and J R Wands

The human hepatoma cell line PLC/PRF/5, which contains integrated hepatitis B virus DNA, synthesises and secretes hepatitis B virus surface antigen (HBsAg). When injected into BALB/c nude mice, these cells produce well-vascularized, encapsulated tumours in almost 100% of animals. HBsAg has been demonstrated on the surface and in the cytoplasm of PLC/PRF/5 cells using immunofluorescence techniques. Recently, we reported that monoclonal antibodies to HBsAg (IgG1, IgG2a and IgM isotypes) bind to HBsAg-associated viral determinants of PLC/PRF/5 cells in culture and immunoprecipitate HBsAg secreted into the growth medium. Also IgG2a and IgM antibodies to HBsAg (anti-HBs) produce specific lysis of PLC/PRF/5 cells in culture in the presence of complement, but have no lytic effect on human hepatoma cells which do not express HBsAg. In the present study, we demonstrate that IgM and IgG2a, but not IgG1, monoclonal anti-HBs specifically prevent or suppress tumour formation in a substantial number of athymic nude mice injected with PLC/PRF/5 cells.

UI MeSH Term Description Entries
D007074 Immunoglobulin G The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B. Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007075 Immunoglobulin M A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin. Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D007167 Immunotherapy Manipulation of the host's immune system in treatment of disease. It includes both active and passive immunization as well as immunosuppressive therapy to prevent graft rejection. Immunotherapies
D008114 Liver Neoplasms, Experimental Experimentally induced tumors of the LIVER. Hepatoma, Experimental,Hepatoma, Morris,Hepatoma, Novikoff,Experimental Hepatoma,Experimental Hepatomas,Experimental Liver Neoplasms,Hepatomas, Experimental,Neoplasms, Experimental Liver,Experimental Liver Neoplasm,Liver Neoplasm, Experimental,Morris Hepatoma,Novikoff Hepatoma
D008297 Male Males
D008819 Mice, Nude Mutant mice homozygous for the recessive gene "nude" which fail to develop a thymus. They are useful in tumor studies and studies on immune responses. Athymic Mice,Mice, Athymic,Nude Mice,Mouse, Athymic,Mouse, Nude,Athymic Mouse,Nude Mouse
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D004279 DNA, Viral Deoxyribonucleic acid that makes up the genetic material of viruses. Viral DNA
D006510 Hepatitis B Antibodies Antibodies to the HEPATITIS B ANTIGENS, including antibodies to the surface (Australia) and core of the Dane particle and those to the "e" antigens. Anti-Australia Antigens,Anti-HBAg,Anti-Hepatitis B Antigens,Anti HBAg,Hepatitis B Virus Antibodies,Anti Australia Antigens,Anti Hepatitis B Antigens,Antibodies, Hepatitis B,Antigens, Anti-Australia,Antigens, Anti-Hepatitis B,B Antibodies, Hepatitis,B Antigens, Anti-Hepatitis,HBAg, Anti
D006515 Hepatitis B virus The type species of the genus ORTHOHEPADNAVIRUS which causes human HEPATITIS B and is also apparently a causal agent in human HEPATOCELLULAR CARCINOMA. The Dane particle is an intact hepatitis virion, named after its discoverer. Non-infectious spherical and tubular particles are also seen in the serum. Dane Particle,Hepatitis Virus, Homologous Serum,B virus, Hepatitis,Hepatitis B viruses,Particle, Dane,viruses, Hepatitis B

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