Oncolytic Herpes Simplex Virus Inhibits Pediatric Brain Tumor Migration and Invasion

Julia V. Cockle, Anke Brüning-Richardson, Karen J. Scott, Jill Thompson, Timothy Kottke, Ewan Morrison, Azam Ismail, Angel M. Carcaboso, Ailsa Rose, Peter Selby, Joe Conner, Susan Picton, Susan Short, Richard Vile, Alan Melcher, Elizabeth Ilett

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5 Citations (Scopus)

Abstract

Pediatric high-grade glioma (pHGG) and diffuse intrinsic pontine glioma (DIPG) are invasive tumors with poor survival. Oncolytic virotherapy, initially devised as a direct cytotoxic treatment, is now also known to act via immune-mediated mechanisms. Here we investigate a previously unreported mechanism of action: the inhibition of migration and invasion in pediatric brain tumors. We evaluated the effect of oncolytic herpes simplex virus 1716 (HSV1716) on the migration and invasion of pHGG and DIPG both in vitro using 2D (scratch assay, live cell imaging) and 3D (spheroid invasion in collagen) assays and in vivo using an orthotopic xenograft model of DIPG invasion. HSV1716 inhibited migration and invasion in pHGG and DIPG cell lines. pHGG cells demonstrated reduced velocity and changed morphology in the presence of virus. HSV1716 altered pHGG cytoskeletal dynamics by stabilizing microtubules, inhibiting glycogen synthase kinase-3, and preventing localized clustering of adenomatous polyposis coli (APC) to the leading edge of cells. HSV1716 treatment also reduced tumor infiltration in a mouse orthotopic xenograft DIPG model. Our results demonstrate that HSV1716 targets the migration and invasion of pHGG and DIPG and indicates the potential of an oncolytic virus (OV) to be used as a novel anti-invasive treatment strategy for pediatric brain tumors.

Original languageEnglish
Pages (from-to)75-86
Number of pages12
JournalMolecular Therapy - Oncolytics
Volume5
Early online date2 May 2017
DOIs
Publication statusPublished - 16 Jun 2017
Externally publishedYes

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    Cockle, J. V., Brüning-Richardson, A., Scott, K. J., Thompson, J., Kottke, T., Morrison, E., Ismail, A., Carcaboso, A. M., Rose, A., Selby, P., Conner, J., Picton, S., Short, S., Vile, R., Melcher, A., & Ilett, E. (2017). Oncolytic Herpes Simplex Virus Inhibits Pediatric Brain Tumor Migration and Invasion. Molecular Therapy - Oncolytics, 5, 75-86. https://doi.org/10.1016/j.omto.2017.04.002