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Development of modified vaccinia Ankara-5T4 as specific immunotherapy for advanced human cancer.


ABSTRACT: The tumor-associated antigen 5T4 is expressed on a high percentage of human carcinomas and has limited expression in normal tissues. A recombinant pox virus vector expressing this antigen, modified vaccinia Ankara (MVA)-5T4, has been tested as a cancer vaccine.Treatment with MVA-5T4 has been studied both as a single agent and in combination with standard chemo-, biologic- or targeted-therapies in patients with advanced colorectal cancer, renal cell carcinoma (RCC) or hormone-refractory prostate cancer.This review summarizes data from clinical studies with MVA-5T4 reported in published manuscripts, meeting abstracts or posted on websites relevant to clinical trials or MVA-5T4.Vaccination with MVA-5T4 is well tolerated and elicits 5T4-specific humoral and/or cellular responses in most of the treated patients. Retrospective analyses of Phase II studies have suggested a positive association between immune responses to 5T4 and favorable clinical outcomes. A continuing Phase III, double-blind, placebo-controlled trial seeks to confirm a positive association between vaccination with MVA-5T4 and survival in patients with advanced RCC.

SUBMITTER: Tykodi SS 

PROVIDER: S-EPMC2592504 | biostudies-other | 2008 Dec

REPOSITORIES: biostudies-other

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Development of modified vaccinia Ankara-5T4 as specific immunotherapy for advanced human cancer.

Tykodi Scott S SS   Thompson John A JA  

Expert opinion on biological therapy 20081201 12


<h4>Background</h4>The tumor-associated antigen 5T4 is expressed on a high percentage of human carcinomas and has limited expression in normal tissues. A recombinant pox virus vector expressing this antigen, modified vaccinia Ankara (MVA)-5T4, has been tested as a cancer vaccine.<h4>Objective</h4>Treatment with MVA-5T4 has been studied both as a single agent and in combination with standard chemo-, biologic- or targeted-therapies in patients with advanced colorectal cancer, renal cell carcinoma  ...[more]

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