Adenoviruses induce autophagy to promote virus replication and oncolysis.

Abstract:

:Adenoviruses with deletion of E1b have been used in clinical trials to treat cancers that are resistant to conventional therapies. The efficacy of viral replication within cancer cells determines the results of oncolytic therapy, which remains poorly understood and requires further improvement. In this report, we show that adenoviruses induce autophagy by increasing the conversion of LC3-I to LC3-II and the formation of the Atg12-Atg5 complex. Inhibition of autophagy with 3-methyladenine (3MA) resulted in a decreased synthesis of adenovirus structural proteins, and thereby a poor viral replication; promotion of autophagy with rapamycin increased adenovirus yield. This study indicates that adenovirus-induced autophagy correlates positively with virus replication and oncolytic cell death, and that autophagy may generate nutrients that can be used for building viral progeny particles. These results further suggest that chemotherapeutic agents that increase cancer cell autophagy may improve the efficacy of oncolytic virotherapy.

journal_name

Virology

journal_title

Virology

authors

Rodriguez-Rocha H,Gomez-Gutierrez JG,Garcia-Garcia A,Rao XM,Chen L,McMasters KM,Zhou HS

doi

10.1016/j.virol.2011.04.017

subject

Has Abstract

pub_date

2011-07-20 00:00:00

pages

9-15

issue

1-2

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(11)00197-8

journal_volume

416

pub_type

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