Abstract:
:Adenovirus-mediated virotherapy is one of the promising therapeutic approaches for glioma treatment. However, its replication efficiency and specificity still failed to meet the requirements for clinical treatment. To improve the anti-tumor activity and specificity of oncolytic adenoviruses (OA), we applied multiple miRNA response elements (MREs) of miR-124, miR-128, miR-146b and miR-218, whose expressions were downregulated in glioma cells, to enable OA to be specific to glioma. Adenoviral E1A protein regulated by these 4 MREs (OA-4MREs) was shown to be highly expressed in glioma cells, but not in normal cells. The selective E1A expression led to glioma-specific replication and cytotoxicity of OA-4MREs. Animal experiments also showed that OA-4MREs exhibited improved anti-tumor activities for both subcutaneous and intracranial glioma xenografts, without significant toxicity to normal brain and liver tissues. Collectively, we demonstrated that oncolytic adenovirus, whose replication was regulated by MREs, may be promising biological agents for glioma treatment.
journal_name
Virologyjournal_title
Virologyauthors
Yao W,Guo G,Zhang Q,Fan L,Wu N,Bo Ydoi
10.1016/j.virol.2014.04.007subject
Has Abstractpub_date
2014-06-01 00:00:00pages
69-82eissn
0042-6822issn
1096-0341pii
S0042-6822(14)00130-5journal_volume
458-459pub_type
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