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Title: Development of a gene/drug dual delivery system for brain tumor therapy: Potent inhibition via RNA interference and synergistic effects
Authors: Lei, C.
Cui, Y.
Zheng, L.
Kah-Hoe Chow, P.
Wang, C.-H. 
Keywords: Drug/gene delivery
Intracranial glioblastoma
RNA interference
Issue Date: Oct-2013
Citation: Lei, C., Cui, Y., Zheng, L., Kah-Hoe Chow, P., Wang, C.-H. (2013-10). Development of a gene/drug dual delivery system for brain tumor therapy: Potent inhibition via RNA interference and synergistic effects. Biomaterials 34 (30) : 7483-7494. ScholarBank@NUS Repository.
Abstract: Malignant brain tumors are characterized by three major physiological processes: proliferation, angiogenesis, and invasion. Traditional cytotoxic chemotherapies (e.g. Paclitaxel) control the tumor by blocking growth and proliferation mechanisms, but leave angiogenesis and invasion unchecked. We identified Matrix metalloproteinase-2 (MMP-2), an essential proteinase regulating brain tumor invasion and angiogenesis, as one of the therapeutic target. A designer RNAi plasmid was developed, and complexed with the gene carrier polyethylenimine (PEI), in an effort to specifically suppress MMP-2 expression in tumor cells. The gene and a cytotoxic drug Paclitaxel were then dual-encapsulated in PLGA based submicron implants to achieve a sustained release of both agents. Potent inhibition effects on MMP-2 mRNA and protein expression, invitro cell angiogenesis and invasion were demonstrated both on the PEI/DNA nanoparticles alone, and on the PEI/DNA nanoparticles embedded in microfibers. Most importantly, through invivo test on intracranial xenograft tumor model in BALB/c nude mice, it was proved that the gene/drug dual delivery microfibers are able to impose significant tumor regression compared with single drug delivery microfibers and commercial drug treatment, showing evidence for synergistic therapeutic efficacy. © 2013 Elsevier Ltd.
Source Title: Biomaterials
ISSN: 01429612
DOI: 10.1016/j.biomaterials.2013.06.010
Appears in Collections:Staff Publications

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