A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus.

A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Research Abstract Details 

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A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Abstract Text:

S Yang,Z S Guo,M E O'Malley,X Yin,H J Zeh,D L Bartlett,

To enhance further the safety and efficacy of oncolytic vaccinia virus, we have developed a new virus with targeted deletions of three viral genes encoding thymidine kinase and antiapoptotic/host range proteins SPI-1 and SPI-2 (vSPT). Infection of human and murine tumor cell lines yielded nearly equivalent or a log lower virus recovery in comparison to parental viruses. Viral infection activated multiple caspases in cancer cells but not in normal cells, suggesting infected cells may die via different pathways. In tumor-bearing mice, vSPT recovery from MC38 tumor was slightly reduced in comparison to two parental viruses. However, no virus was recovered from the brains and livers of mice injected with vSPT in contrast to control viruses. vSPT demonstrated significantly lower pathogenicity in nude mice. Systemic delivery of vSPT showed significant tumor inhibition in subcutaneous MC38 tumor, human ovarian A2780 and murine ovarian MOSEC carcinomatosis models; however, the tumor inhibition by vSPT was reduced compared with parental viruses. These results demonstrated that although deletion of these three viral genes further enhanced tumor selectivity, it also weakened the oncolytic potency. This study illustrates the complexity of creating a tumor-selective oncolytic virus by deleting multiple viral genes involved in multiple cellular pathways.

A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Publishing Authors By Initials

S Yang,ZS Guo,ME O'Malley,X Yin,HJ Zeh,DL Bartlett,

For similar biological phenomena, cell phenomena, and immunity: biological phenomena: microbiologic phenomena: viral physiology: virus replication research abstracts see: biological phenomena, cell phenomena, and immunity: biological phenomena: microbiologic phenomena: viral physiology: virus replication research

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A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Gene therapy

VOLUME: 14

Page Numbers: 638-47

Journal Abbreviation: Gene Ther.

ISSN: 0969-7128

DAY: 1

MONTH: 02

YEAR: 2007

A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 9421525

A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Keywords Mesh Terms:

KEYWORDS: Virus Replication

MESH TERMS: genetics

Chemical & Substance for Abstract: A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus. Information

Substance Name: Protein Kinases

Registry Number: EC 2.7.1.37

Grant and Affiliation Information for A new recombinant vaccinia with targeted deletion of three viral genes: its safety and efficacy as an oncolytic virus.

AFFILIATION: University of Pittsburgh Cancer Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.

Country: England

AGENCY: United States NCI

GRANT: CA100415

ACRONYM: CA

MEDLINETA: Gene Ther

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