Macrophage delivery of an oncolytic virus abolishes tumor regrowth and metastasis after chemotherapy or irradiation.

Abstract:

:Frontline anticancer therapies such as chemotherapy and irradiation often slow tumor growth, but tumor regrowth and spread to distant sites usually occurs after the conclusion of treatment. We recently showed that macrophages could be used to deliver large quantities of a hypoxia-regulated, prostate-specific oncolytic virus (OV) to prostate tumors. In the current study, we show that administration of such OV-armed macrophages 48 hours after chemotherapy (docetaxel) or tumor irradiation abolished the posttreatment regrowth of primary prostate tumors in mice and their spread to the lungs for up to 27 or 40 days, respectively. It also significantly increased the lifespan of tumor-bearing mice compared with those given docetaxel or irradiation alone. These new findings suggest that such a novel, macrophage-based virotherapy could be used to markedly increase the efficacy of chemotherapy and irradiation in patients with prostate cancer.

journal_name

Cancer Res

journal_title

Cancer research

authors

Muthana M,Rodrigues S,Chen YY,Welford A,Hughes R,Tazzyman S,Essand M,Morrow F,Lewis CE

doi

10.1158/0008-5472.CAN-12-3056

subject

Has Abstract

pub_date

2013-01-15 00:00:00

pages

490-5

issue

2

eissn

0008-5472

issn

1538-7445

pii

0008-5472.CAN-12-3056

journal_volume

73

pub_type

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