Targeting GBM with an Oncolytic Picornavirus SVV-001 alone and in combination with fractionated Radiation in a Novel Panel of Orthotopic PDX models

Huiyuan Zhang, Yuchen Du, Lin Qi, Sophie Xiao, Frank K. Braun, Mari Kogiso, Yulun Huang, Frank Huang, Aalaa Abdallah, Milagros Suarez, Sekar Karthick, Nabil M. Ahmed, Vita S. Salsman, Patricia A. Baxter, Jack M. Su, Daniel J. Brat, Paul L. Hellenbeck, Wan Yee Teo, Akash J. Patel*, Xiao Nan Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Background: Animal models representing different molecular subtypes of glioblastoma multiforme (GBM) is desired for developing new therapies. SVV-001 is an oncolytic virus selectively targeting cancer cells. It’s capacity of passing through the blood brain barrier makes is an attractive novel approach for GBM. Materials and methods: 23 patient tumor samples were implanted into the brains of NOD/SCID mice (1 × 105 cells/mouse). Tumor histology, gene expression (RNAseq), and growth rate of the developed patient-derived orthotopic xenograft (PDOX) models were compared with the originating patient tumors during serial subtransplantations. Anti-tumor activities of SVV-001 were examined in vivo; and therapeutic efficacy validated in vivo via single i.v. injection (1 × 1011 viral particle) with or without fractionated (2 Gy/day x 5 days) radiation followed by analysis of animal survival times, viral infection, and DNA damage. Results: PDOX formation was confirmed in 17/23 (73.9%) GBMs while maintaining key histopathological features and diffuse invasion of the patient tumors. Using differentially expressed genes, we subclassified PDOX models into proneural, classic and mesenchymal groups. Animal survival times were inversely correlated with the implanted tumor cells. SVV-001 was active in vitro by killing primary monolayer culture (4/13 models), 3D neurospheres (7/13 models) and glioma stem cells. In 2/2 models, SVV-001 infected PDOX cells in vivo without harming normal brain cells and significantly prolonged survival times in 2/2 models. When combined with radiation, SVV-001 enhanced DNA damages and further prolonged animal survival times. Conclusion: A panel of 17 clinically relevant and molecularly annotated PDOX modes of GBM is developed, and SVV-001 exhibited strong anti-tumor activities in vitro and in vivo.

Original languageEnglish (US)
Article number444
JournalJournal of Translational Medicine
Volume21
Issue number1
DOIs
StatePublished - Dec 2023

Keywords

  • Glioblastoma
  • Oncolytic virus
  • Patient-derived orthotopic xenograft
  • SVV-001
  • Therapeutic efficacy

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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