Tumor vaccine: current trends in antigen specific immunotherapy.

Effective cancer treatment to prevent the tumor growth as well as to stop its recurrence is the dream of oncologists. Currently available therapeutic measures like, radiotherapy and chemotherapy, often suffer from severe toxicity and lack of specificity of the drug towards tumor cells. Another promising approach is the 'immunotherapy', in which either the immune system is activated by tumor vaccine to combat the tumor growth or antitumor antibodies can be used. Vaccination can stimulate humoral, cellular and innate immune systems to generate various effector molecules, like antibody, cytotoxic T cells, cytokines etc. In antigen specific immunotherapy, the immune system can be stimulated actively by antigen based tumor vaccine to kill only those tumor cells, having expression of the particular tumor associated antigen. Different experimental, preclinical and clinical studies have proved that generated immune responses are effective to restrict the tumor growth. Useful strategies of antigen specific immunotherapy and outcome of various laboratory and clinic based studies are discussed.