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| Content Provider | PubMed Central |
|---|---|
| Author | Erkko, Ylösmäki Martikainen, Miika Ari, Hinkkanen Kalle, Saksela |
| Copyright Year | 2013 |
| Abstract | Artificial target sequences for tissue-specific miRNAs have recently been introduced as a new means for altering the tissue tropism of viral replication. This approach can be used to improve the safety of oncolytic viruses for cancer virotherapy by restricting their replication in unwanted tissues, such as the liver. Semliki Forest virus (SFV) is a positive-strand RNA virus and, similar to the related alphaviruses, like Sindbis virus, has potential as a gene therapy vector and an oncolytic virotherapy agent, but this potential is limited by the neurovirulence of these alphaviruses. Here, we have generated a replicative SFV4 carrying six tandem targets for the neuron-specific miR124 between the viral nonstructural protein 3 and 4 (nsp3 and nsp4) genes. When administered intraperitoneally into adult BALB/c mice, SFV4-miRT124 displayed an attenuated spread into the central nervous system (CNS) and greatly increased survival. Peripheral replication was not affected, indicating neuron-specific attenuation. Moreover, a strong protective SFV immunity was elicited in these animals. Intracranial infection of adult mice with SFV4-miRT124 showed greatly reduced infection of neurons in the brain but led to the infection of oligodendrocytes in the corpus callosum. Taken together, our data show that miR124-mediated attenuation of neurovirulence is a feasible and promising strategy for generating safer oncolytic alphavirus virotherapy agents. |
| Related Links | http://dx.doi.org/10.1128/jvi.01940-12 |
| Ending Page | 344 |
| Page Count | 10 |
| Starting Page | 335 |
| File Format | |
| ISSN | 0022538X |
| e-ISSN | 10985514 |
| Journal | Journal of Virology |
| Issue Number | 1 |
| Volume Number | 87 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2013-01-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Immunology Virology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Virology Immunology Microbiology Insect Science |
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