Accession Number:

ADA589848

Title:

Oncolytic Virotherapy Targeting Lung Cancer Drug Resistance

Descriptive Note:

Annual rept. 1 Aug 2012-31 Jul 2013

Corporate Author:

VACCINE AND GENE THERAPY INST OF FLORIDA PORT SAINT LUCIE

Personal Author(s):

Report Date:

2013-08-01

Pagination or Media Count:

18.0

Abstract:

Replication competent vesicular stomatitis virus VSV can exert a dual antitumor effect by triggering direct tumor lysis and eliciting tumor specific immunity. VSV can also deliver tumor associated epitopes or other immunomodulatory molecules to enhance the antitumor immune responses. This is particularly desirable for lung tumors, which are usually poorly immunogenic, and quickly develop drug resistance. Our hypothesis is that that the delivery of a tumor antigen library derived from a drug resistant population will target that specific tumor cell population for elimination by the immune system. In order to generate such a library, we utilized mouse lung cancer cells KLN205 K-CP0 to generate cisplatin-resistant cells, K-CP3 and K-CP6. Two cell lines were generated by prolonged exposure to increasing concentrations of cisplatin, and both K-CP3 and KCP6 were sensitive to the cytopathic effect of VSV. When grown subcutaneously in immunocompetent DBA2 mice, both KCP0 and K-CP6 formed tumors. Intratumoral injection of VSV into either K-CP0 or K-CP6 tumors led to a delay in tumor growth. Histological examination of K-CP0 and K-CP6 tumors revealed a decrease in necrotic areas in the VSV-treated tumors, and the levels of infiltrating leukocytes were similar across the VSV-treated tumors. Altogether the data indicate that VSV-based therapy is effective against a cisplatin-resistant lung tumor model.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research

Distribution Statement:

APPROVED FOR PUBLIC RELEASE