Perfusion pressure is a critical determinant of the intratumoral extravasation of oncolytic viruses

Amber Miller, Rebecca Nace, Camilo C. Ayala-Breton, Michael Steele, Kent Bailey, Kah Whye Peng, Stephen J. Russell

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Antitumor efficacy of oncolytic virotherapy is determined by the density and distribution of infectious centers within the tumor, which may be heavily influenced by the permeability and blood flow in tumor microvessels. Here, we investigated whether systemic perfusion pressure, a key driver of tumor blood flow, could influence the intratumoral extravasation of systemically administered oncolytic vesicular stomatitis virus (VSV) in myeloma tumor-bearing mice. Exercise was used to increase mean arterial pressure, and general anesthesia to decrease it. A recombinant VSV expressing the sodium iodide symporter (NIS), which concentrates radiotracers at sites of infection, was administered intravenously to exercising or anesthetized mice, and nuclear NIS reporter gene imaging was used to noninvasively track the density and spatial distribution of intratumoral infectious centers. Anesthesia resulted in decreased intratumoral infection density, while exercise increased the density and uniformity of infectious centers. Perfusion state also had a significant impact on the antitumor efficacy of the VSV therapy. In conclusion, quantitative dynamic radiohistologic imaging was used to noninvasively interrogate delivery of oncolytic virotherapy, highlighting the critical importance of perfusion pressure as a driver of intratumoral delivery and efficacy of oncolytic viruses.

Original languageEnglish (US)
Pages (from-to)306-317
Number of pages12
JournalMolecular Therapy
Issue number2
StatePublished - Feb 1 2016

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics
  • Pharmacology
  • Drug Discovery


Dive into the research topics of 'Perfusion pressure is a critical determinant of the intratumoral extravasation of oncolytic viruses'. Together they form a unique fingerprint.

Cite this