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Bioluminescence-Based Tumor Quantification Method for Monitoring Tumor Progression and Treatment Effects in Mouse Lymphoma Models
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Analysis of Immunological Treatment Effects of Virotherapy in Tumor Tissue

Krishna Das1,2, Carles Urbiola1,2, Bart Spiesschaert1,2,3

  • 1Division of Virology, Medical University of Innsbruck, Innsbruck, Austria.

Methods in Molecular Biology (Clifton, N.J.)
|September 6, 2019
PubMed

Insights

Oncolytic virus VSV-GP effectively targets tumors and stimulates the immune system. This study analyzes its impact on the tumor microenvironment, revealing its potential in cancer immunotherapy.

Area of Science:

  • Immunology
  • Virology
  • Oncology

Background:

  • Oncolytic viruses are promising cancer immunotherapies due to their tumor-killing and immune-stimulating properties.
  • Understanding the tumor microenvironment (TME) is crucial for optimizing antiviral and antitumor immune responses.
  • VSV-GP is an oncolytic virus with a rapid replication cycle, broad-spectrum anticancer activity, and ability to induce inflammation.

Purpose of the Study:

  • To comprehensively analyze the effects of VSV-GP oncolytic virus treatment in the tumor microenvironment.
  • To investigate the modulation of immune cells and immune-regulatory factors by VSV-GP.
  • To characterize immune signatures induced by VSV-GP using gene expression profiling.

Main Methods:

  • Utilized a multidisciplinary approach to study VSV-GP treatment effects in tumors.
  • Assessed tumor-infiltrating lymphocytes (TILs) and tumor-associated macrophages (TAMs).
  • Analyzed immune-regulatory factors, including cytokines.
  • Employed an immune-targeted NanoString gene expression system to characterize immune signatures.

Main Results:

  • VSV-GP demonstrated potent direct tumoricidal activity.
  • Treatment with VSV-GP induced a robust inflammatory conversion of the tumor microenvironment.
  • A strong adaptive immune response towards the tumor was observed following VSV-GP treatment.

Conclusions:

  • VSV-GP is a safe and effective oncolytic virus with significant potential in cancer immunotherapy.
  • VSV-GP effectively modulates the tumor microenvironment and enhances anti-tumor immunity.
  • Further research into VSV-GP-mediated immune modulation can optimize combination therapies.
Keywords:
Cytokine multiplexLEGENDplexNanoStringOncolytic virusTumor-associated macrophagesTumor-infiltrating lymphocytesVSV-GP

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