Method of treating tumors with CD8+-depleted or CD4+ T cell subpopulations

The present invention provides a method for enhancing the immunotherapeutic activity, e.g., antitumor activity, of immune cells by depleting immune cells of a cell subset that down-regulates the immune response, such as either CD4+ or CD8+ lymphocytes. The remaining depleted immune cell population o...

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Bibliographische Detailangaben
Hauptverfasser:	LONGO, DAN L, SAXTON, MARK L, OCHOA, AUGUSTO CARLOS
Format:	Patent
Sprache:	eng
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF CULTURE MEDIA ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING ORGANIC CHEMISTRY PEPTIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS SPIRITS VINEGAR WINE
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Beschreibung
Zusammenfassung:	The present invention provides a method for enhancing the immunotherapeutic activity, e.g., antitumor activity, of immune cells by depleting immune cells of a cell subset that down-regulates the immune response, such as either CD4+ or CD8+ lymphocytes. The remaining depleted immune cell population or the separated immune cell subsets then are cultured in the presence of an antibody to a lymphocyte surface receptor, preferably an anti-CD3 monoclonal antibody (MoAb), optionally in the presence of a relatively minor amount of interleukin-2 (IL-2). These stimulated cells then are optionally additionally cultured in the presence of IL-2 without an antibody to a lymphocyte surface receptor. The present invention also provides a method of treating a mammal having tumors or immunizing a mammal against tumors by administering the stimulated depleted immune cell population or a stimulated immune cell subset to a mammal, advantageously together with an immunosuppressant, and with liposomal IL-2. The invention further provides a method of transferring the immunity of mammals that are treated or immunized in accordance with the invention by extracting splenocytes from these mammals and administering these splenocytes to a second mammal.