Highly specific in vivo gene delivery for p53-mediated apoptosis and genetic photodynamic therapies of tumour

S.-Ja Tseng, Zi-Xian Liao, Shih-Han Kao, Yi-Fang Zeng, Kuo-Yen Huang, Hsin-Jung Li, Chung-Lin Yang, Yu-Fan Deng, Chi-Feng Huang, Shuenn-Chen Yang, Pan-Chyr Yang () and Ivan M. Kempson ()
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S.-Ja Tseng: National Taiwan University College of Medicine
Zi-Xian Liao: Institute of Medical Science and Technology, National Sun Yat-sen University
Shih-Han Kao: Research Center for Tumor Medical Science, China Medical University
Yi-Fang Zeng: Institute of Biotechnology, National Taiwan University
Kuo-Yen Huang: Graduate Institute of Life Sciences, National Defense Medical Center
Hsin-Jung Li: Graduate Institute of Life Sciences, National Defense Medical Center
Chung-Lin Yang: Chang Gung Memorial Hospital
Yu-Fan Deng: Chung Yuan Christian University
Chi-Feng Huang: Institute of Physics, Academia Sinica
Shuenn-Chen Yang: Institute of Biomedical Sciences, Academia Sinica
Pan-Chyr Yang: National Taiwan University College of Medicine
Ivan M. Kempson: Ian Wark Research Institute, University of South Australia

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract Anticancer therapies are often compromised by nonspecific effects and challenged by tumour environments’ inherent physicochemical and biological characteristics. Often, therapeutic effect can be increased by addressing multiple parameters simultaneously. Here we report on exploiting extravasation due to inherent vascular leakiness for the delivery of a pH-sensitive polymer carrier. Tumours’ acidic microenvironment instigates a charge reversal that promotes cellular internalization where endosomes destabilize and gene delivery is achieved. We assess our carrier with an aggressive non-small cell lung carcinoma (NSCLC) in vivo model and achieve >30% transfection efficiency via systemic delivery. Rejuvenation of the p53 apoptotic pathway as well as expression of KillerRed protein for sensitization in photodynamic therapy (PDT) is accomplished. A single administration greatly suppresses tumour growth and extends median animal survival from 28 days in control subjects to 68 days. The carrier has capacity for multiple payloads for greater therapeutic response where inter-individual variability can compromise efficacy.

Date: 2015
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DOI: 10.1038/ncomms7456

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