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Geletneky, Karsten; Kiprianova, Irina; Ayache, Ali; Koch, Regina; Herrero y Calle, Marta; Deleu, Laurent; Sommer, Clemens; Thomas, Nadja; Rommelaere, Jean; Schlehofer, Jörg R
Neuro-oncology (Charlottesville, Va.), 08/2010, Letnik: 12, Številka: 8Journal Article
Oncolytic virotherapy is a potential treatment modality under investigation for various malignancies including malignant brain tumors. Unlike some other natural or modified viruses that show oncolytic activity against cerebral neoplasms, the rodent parvovirus H-1 (H-1PV) is completely apathogenic in humans. H-1PV efficiently kills a number of tumor cells without harm to corresponding normal ones. In this study, the concept of H-1PV-based virotherapy of glioma was tested for rat (RG-2 cell-derived) and for human (U87 cell-derived) gliomas in immunocompetent and immunodeficient rat models, respectively. Large orthotopic rat and human glioma cell-derived tumors were treated with either single stereotactic intratumoral or multiple intravenous (iv) H-1PV injections. Oncolysis was monitored by magnetic resonance imaging and proven by histology. Virus distribution and replication were determined in brain and organs. In immunocompetent rats bearing RG-2-derived tumors, a single stereotactic intratumoral injection of H-1PV and multiple systemic (iv) applications of the virus were sufficient for remission of advanced and even symptomatic intracranial gliomas without damaging normal brain tissue or other organs. H-1PV therapy resulted in significantly improved survival (Kaplan-Meier analysis) in both the rat and human glioma models. Virus replication in tumors indicated a contribution of secondary infection by progeny virus to the efficiency of oncolysis. Virus replication was restricted to tumors, although H-1PV DNA could be detected transiently in adjacent or remote normal brain tissue and in noncerebral tissues. The results presented here and the innocuousness of H-1PV for humans argue for the use of H-1PV as a powerful means to perform oncolytic therapy of malignant gliomas.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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