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Viruses 2016, 8(1), 20; doi:10.3390/v8010020

Features of the Antitumor Effect of Vaccinia Virus Lister Strain

1
Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences (ICBFM SB RAS), 8 Lavrentiev Avenue, Novosibirsk 630090, Russia
2
State Research Center of Virology and Biotechnology “Vector”, Koltsovo 630559, Russia
*
Author to whom correspondence should be addressed.
Academic Editors: E. Antonio Chiocca and Martine L.M. Lamfers
Received: 28 July 2015 / Revised: 30 December 2015 / Accepted: 6 January 2016 / Published: 12 January 2016
(This article belongs to the Special Issue Oncolytic Viruses)
View Full-Text   |   Download PDF [14701 KB, uploaded 12 January 2016]   |  

Abstract

Oncolytic abilities of vaccinia virus (VACV) served as a basis for the development of various recombinants for treating cancer; however, “natural” oncolytic properties of the virus are not examined in detail. Our study was conducted to know how the genetically unmodified L-IVP strain of VACV produces its antitumor effect. Human A431 carcinoma xenografts in nude mice and murine Ehrlich carcinoma in C57Bl mice were used as targets for VACV, which was injected intratumorally. A set of virological methods, immunohistochemistry, light and electron microscopy was used in the study. We found that in mice bearing A431 carcinoma, the L-IVP strain was observed in visceral organs within two weeks, but rapidly disappeared from the blood. The L-IVP strain caused decrease of sizes in both tumors, however, in different ways. Direct cell destruction by replicating virus plays a main role in regression of A431 carcinoma xenografts, while in Ehrlich carcinoma, which poorly supported VACV replication, the virus induced decrease of mitoses by pushing tumor cells into S-phase of cell cycle. Our study showed that genetically unmodified VACV possesses at least two mechanisms of antitumor effect: direct destruction of tumor cells and suppression of mitoses in tumor cells. View Full-Text
Keywords: vaccinia virus; genetically unmodified L-IVP strain; human A-431 carcinoma xenografts; murine Ehrlich carcinoma; VACV-induced arrest of mitoses vaccinia virus; genetically unmodified L-IVP strain; human A-431 carcinoma xenografts; murine Ehrlich carcinoma; VACV-induced arrest of mitoses
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zonov, E.; Kochneva, G.; Yunusova, A.; Grazhdantseva, A.; Richter, V.; Ryabchikova, E. Features of the Antitumor Effect of Vaccinia Virus Lister Strain. Viruses 2016, 8, 20.

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