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Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program.

Publication ,  Journal Article
Morton, CL; Houghton, PJ; Kolb, EA; Gorlick, R; Reynolds, CP; Kang, MH; Maris, JM; Keir, ST; Wu, J; Smith, MA
Published in: Pediatr Blood Cancer
August 2010

BACKGROUND: Seneca Valley virus (NTX-010) is a non-recombinant, replication competent RNA virus that is undergoing phase 1 clinical trials in adults for tumors with neuroendocrine characteristics. Here we have evaluated the antitumor activity of NTX-010 administered systemically. PROCEDURES: In vitro NTX-010 was tested against 23 cell lines exposed for 96 hr at 1 x 10(-4) to 10(4) viral particles (vp)/cell. In vivo NTX-010 was administered intravenously once at 3 x 10(12) vp/kg. Three measures of antitumor activity were used: (1) an objective response measure modeled after the clinical setting; (2) a treated to control (T/C) tumor volume measure; and (3) a time to event (fourfold increase in tumor volume for solid tumor models), measure based on the median event-free survival (EFS) of treated and control animals for each xenograft. RESULTS: In vitro NTX-010 demonstrated a marked cytotoxic effect in a subset of the cell lines from the neuroblastoma, Ewing sarcoma, and rhabdomyosarcoma panels. In vivo the most consistent activity was observed for the rhabdomyosarcoma and the neuroblastoma panels, with all four of the alveolar rhabdomyosarcoma xenografts and four of five neuroblastoma xenografts achieving CR or maintained CR. Objective responses were also observed in the rhabdoid tumor, Wilms tumor, and glioblastoma panels. CONCLUSIONS: NTX-010 demonstrated a high level of activity both in vitro and in vivo. Further analysis of existing testing and molecular characterization data may help define the biological characteristics of cancer cells that are associated with response to NTX-010.

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Published In

Pediatr Blood Cancer

DOI

EISSN

1545-5017

Publication Date

August 2010

Volume

55

Issue

2

Start / End Page

295 / 303

Location

United States

Related Subject Headings

  • Xenograft Model Antitumor Assays
  • Tumor Burden
  • Treatment Outcome
  • Sarcoma, Ewing
  • Rhabdomyosarcoma
  • RNA Viruses
  • Oncolytic Virotherapy
  • Oncology & Carcinogenesis
  • Neuroblastoma
  • Neoplasms, Experimental
 

Citation

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Morton, C. L., Houghton, P. J., Kolb, E. A., Gorlick, R., Reynolds, C. P., Kang, M. H., … Smith, M. A. (2010). Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program. Pediatr Blood Cancer, 55(2), 295–303. https://doi.org/10.1002/pbc.22535
Morton, Christopher L., Peter J. Houghton, E Anders Kolb, Richard Gorlick, C Patrick Reynolds, Min H. Kang, John M. Maris, Stephen T. Keir, Jianrong Wu, and Malcolm A. Smith. “Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program.Pediatr Blood Cancer 55, no. 2 (August 2010): 295–303. https://doi.org/10.1002/pbc.22535.
Morton CL, Houghton PJ, Kolb EA, Gorlick R, Reynolds CP, Kang MH, et al. Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program. Pediatr Blood Cancer. 2010 Aug;55(2):295–303.
Morton, Christopher L., et al. “Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program.Pediatr Blood Cancer, vol. 55, no. 2, Aug. 2010, pp. 295–303. Pubmed, doi:10.1002/pbc.22535.
Morton CL, Houghton PJ, Kolb EA, Gorlick R, Reynolds CP, Kang MH, Maris JM, Keir ST, Wu J, Smith MA. Initial testing of the replication competent Seneca Valley virus (NTX-010) by the pediatric preclinical testing program. Pediatr Blood Cancer. 2010 Aug;55(2):295–303.
Journal cover image

Published In

Pediatr Blood Cancer

DOI

EISSN

1545-5017

Publication Date

August 2010

Volume

55

Issue

2

Start / End Page

295 / 303

Location

United States

Related Subject Headings

  • Xenograft Model Antitumor Assays
  • Tumor Burden
  • Treatment Outcome
  • Sarcoma, Ewing
  • Rhabdomyosarcoma
  • RNA Viruses
  • Oncolytic Virotherapy
  • Oncology & Carcinogenesis
  • Neuroblastoma
  • Neoplasms, Experimental