Regression of Established Tumors in Mice Mediated by the Oral Administration of a Recombinant Listeria monocytogenes Vaccine

Zhen Kun Pan, Georgios Ikonomidis, Yvonne Paterson, Daew Pardoll

Research output: Contribution to journalArticle


We have shown previously that Listeria monocytogenes, a gram-positive, facultative intracellular bacterium, is a potent vector for targeting tumor-specific antigens to the immune system. After parenteral administration, we observed protection against both renal and colorectal mouse tumors and regression of established renal tumors. In the present study, we have exploited the fact that the normal route of infection of this organism is through the gut We show that an L. monocytogenes recombinant that expresses a model tumor antigen is an effective cancer immu-notherapeutic agent when delivered orally in that it causes regression of established, macroscopic mouse renal and colorectal tumors expressing the same antigen.

Original languageEnglish (US)
Pages (from-to)4776-4779
Number of pages4
JournalCancer Research
Issue number21
StatePublished - May 15 1995


ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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