Immunotherapy K J. Goodrum 2006. Immunotherapies Vaccines (toxoid, attenuated live, killed cell vaccines, subcellular, DNA, peptide) Adjuvants (nonspecific.

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Presentation transcript:

Immunotherapy K J. Goodrum 2006

Immunotherapies Vaccines (toxoid, attenuated live, killed cell vaccines, subcellular, DNA, peptide) Adjuvants (nonspecific immune stimulant) Passive Antibody (IVIG, humanized monoclonal antibodies or immunotoxins) Cytokines (IFN, IL-10, IL-12) or cytokine antagonists (anti-TNF, soluble cytokine receptors)

Immunotherapies Co-stimulator or suppressor signaling molecules (CTLA-4) Adoptive transfer of immune cells –Immune Tc cells –Lymphokine activated NK cells Antagonist peptides (inhibit specific T cells by blocking TcR) Oral tolerance (ingestion of antigen induces suppressive factors[TGF-  ]

Immunosuppressive agents Corticosteroids (block cellular infiltration, cytokine release, T cell maturation, etc.) Azathioprine (inhibit lymphocyte proliferation) Cyclosporine (inhibit IL-2 gene expression) Anti-lymphocyte serum (causes lymphocyte destruction and removal)

Immunosuppressive agents Anti-CD3 (causes T cell destruction) Anti-CD4 (causes T cell destruction Cytotoxic drugs and ionizing radiation (block cell proliferation, lymphopoiesis)

Immunotherapeutic agents : applications: mechanisms of action Anti-TNF-alphaAnti-TNF-alpha: inflammatory bowel disease and rheumatoid arthritis: inhibits inflammatory actions of TNF-alpha Anti-CD20Anti-CD20: non-Hodgkin’s lymphoma: ADCC destruction of B cells Anti-lymphocyte globulinAnti-lymphocyte globulin: treatment of acute graft rejection: depletes T cells via ADCC or inhibits of cell function

Immunotherapeutic agents : applications: mechanisms of action Interferon-alphaInterferon-alpha: –viral hepatitis: anti-viral –Hairy cell leukemia: anti-proliferative Interferon-betaInterferon-beta: –Gliomas: anti-proliferative? –Multiple sclerosis: anti-viral, antagonism of interferon-gamma

Humanized monoclonal antibodies Use of mouse monoclonal antibodies for immunotherapy in humans is limited by immune responses in humans against the foreign mouse antibody proteins. Complementarity determining regions (CDR) of mouse monoclonal antibodies can be grafted onto the framework of a human immunoglobulin. Recombinant antibodies are less immunogenic and induce less allergic reactions.