Abstract:
:The Raf/mitogen-activated protein/extracellular signal-regulated kinase (ERK) kinase (MEK)/ERK signaling cascade enhances tumor cell proliferation in many cases. Here, we show that adenovirus type 5, a small DNA tumor virus used in experimental cancer therapy, strongly induces ERK phosphorylation during the late phase of infection. Pharmacologic inhibition of ERK phosphorylation reduced virus recovery by >100-fold. Blocking MEK/ERK signaling affected virus DNA replication and mRNA levels only weakly but strongly reduced the amount of viral proteins, independently of the kinases MNK1 and PKR. Hence, adenovirus induces the oncogenic Raf/MEK/ERK signaling pathway to enhance viral progeny by sustaining the levels of viral proteins. Concerning therapy, our results suggest that the use of Raf/MEK/ERK inhibitors will interfere with the propagation of oncolytic adenoviruses.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Schümann M,Dobbelstein Mdoi
10.1158/0008-5472.CAN-05-1484subject
Has Abstractpub_date
2006-02-01 00:00:00pages
1282-8issue
3eissn
0008-5472issn
1538-7445pii
66/3/1282journal_volume
66pub_type
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