alexa Necrosis and inhibition of growth of human lung tumor by anti-alpha-human chorionic gonadotropin antibody.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Kumar S, Talwar GP, Biswas DK

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Abstract Human lung tumor cells (ChaGo) established in culture from a bronchogenic squamous cell carcinoma synthesize and secrete large amounts of human chorionic gonadotropin (HCG), predominantly the alpha subunit of the glycoprotein hormone. ChaGo cells lose their transformation phenotypes following treatment with anti-alpha-HCG antibody or following inhibition of intracellular synthesis of alpha-HCG by the anti-sense RNA technique. We report that tumors induced by ChaGo cells in female athymic mice undergo necrotic degeneration following local or intraperitoneal administration of alpha-HCG-specific-antibody. The alpha-HCG antibody did not affect the growth of tumor induced by alpha-HCG nonproducing human tumor cells. Histopathological examinations of the anti-alpha-HCG antibody-treated tumor tissues showed active necrosis. When the antibody treatment was discontinued, the tumorigenesis process resumed. When anti-alpha-HCG antibody was administered simultaneously with ChaGo cells, a concentration-dependent inhibition of tumor growth in athymic mice was completely prevented at higher concentrations of the specific antibody.
This article was published in J Natl Cancer Inst and referenced in Journal of Clinical & Cellular Immunology

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