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Journal of Neuro-Oncology

Erschienen in:

01.03.2013 | Laboratory Investigation

miRNA-mediated tumor specific delivery of TRAIL reduced glioma growth

verfasst von: Yongli Bo, Guocai Guo, Weicheng Yao

Erschienen in: Journal of Neuro-Oncology | Ausgabe 1/2013

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Abstract

As an aggressive cancer with high morbidity, malignant glioma always has a poor prognosis even after surgery, chemotherapy and radiotherapy. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) shows a strong apoptosis-inducing effect on a variety of cancer cells including glioma. However so far, TRAIL delivery mediated by adenoviral vectors lacks tumor specificity and thus has cytotoxicity to normal cells. To improve the tumor-specificity of adenovirus-mediated TRAIL delivery, we utilized miR-124, miR-128, miR-146b and miR-218 to restrict its expression to within glioma cells. qPCR assay showed that expression of these four miRNAs was greatly downregulated in glioma in comparison with normal brain tissue. Luciferase reporter assay confirmed that miR-124, miR-128, miR-146b and miR-218 conferred exogenous gene expression with glioma-specificity. By inserting miRNA response elements (MREs) of these miRNAs into the downstream of TRAIL on adenoviral vectors, TRAIL was highly expressed in glioma cells, but not in normal brain cells. Cell viability and immunoblotting assays and FACS analysis showed that cytotoxicity and apoptosis elicited by TRAIL was only observed in glioma cells, rather than normal brain cells. Animal experiments also showed that MREs-regulated TRAIL delivery reduced the growth of glioma xenograft. In this study, we proved that miRNA-mediated tumor specific delivery of TRAIL was able to inhibit the survival of glioma cells and reduce the growth of glioma in vivo.

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Titel: miRNA-mediated tumor specific delivery of TRAIL reduced glioma growth
verfasst von: Yongli Bo
Guocai Guo
Weicheng Yao
Publikationsdatum: 01.03.2013
Verlag: Springer US
Erschienen in: Journal of Neuro-Oncology / Ausgabe 1/2013
Print ISSN: 0167-594X
Elektronische ISSN: 1573-7373
DOI: https://doi.org/10.1007/s11060-012-1033-y

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