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Silencing of IKKε using siRNA inhibits proliferation and invasion of glioma cells in vitro and in vivo

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Recent studies implicated IKKε in the pathogenesis of many human cancers by promoting cell proliferation, increasing tumor angiogenesis and metastasis, and generating resistance to cell apoptosis. However, whether IKKε can influence the invasive ability and proliferation of glioma cells remains largely unknown. In this study, we showed that overexpression of IKKε is positively correlated to glioma pathological grade, suggesting that IKKε plays a role in tumor progression, rather than tumor initiation. Targeted knockdown of IKKε in human glioma cells using siRNA, was associated with inhibition of cell growth, cell cycle arrest and decreased cell invasion; however, notable apoptosis was not observed. Furthermore, we demonstrated that transposition of NF-κB p65 resulted in the alteration of these phenotypes. Tumor growth was attenuated in established subcutaneous gliomas in nude mice treated with IKKε siRNA in vivo. Collectively, our results suggest that deregulation of IKKε plays a pivotal role in the uncontrolled proliferation and malignant invasion of glioma cells in vitro and in vivo by targeting NF-κB. Silencing of IKKε using synthetic siRNAs may offer a novel therapeutic strategy for the treatment of glioma.
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Document Type: Research Article

Affiliations: 1: Laboratory of Neuro-Oncology, Tianjin Neurological Institute, Tianjin 300052, P.R. China 2: Department of Neurosurgery, the Second Affiliated Hospital of Harbin Medical University, Harbin 150086, P.R. China 3: Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China

Publication date: January 1, 2012

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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