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Huo M, Liu Y, Wang L, Yin T, Qin C, Xiao Y, Yin L, Liu J, Zhou J. Redox-Sensitive Micelles Based on O,N-Hydroxyethyl Chitosan-Octylamine Conjugates for Triggered Intracellular Delivery of Paclitaxel. Mol Pharm 2016; 13:1750-62. [PMID: 27100204 DOI: 10.1021/acs.molpharmaceut.5b00696] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A redox-sensitive micellar system constructed from an O,N-hydroxyethyl chitosan-octylamine (HECS-ss-OA) conjugate with disulfide linkages between the hydrophobic alkyl chains and hydrophilic chitosan backbone was synthesized for triggered intracellular delivery of hydrophobic paclitaxel (PTX). In aqueous environments, conjugates formed micelles with high PTX loading (>30%). Mechanistically, the sensitivity of HECS-ss-OA micelles to reducing environments was investigated using the parameters of in vitro release and particle size. Intracellular release of nile red fluorescence alongside cytotoxicity studies further confirmed the potency of redox-sensitive micelles for intracellular drug delivery compared with redox-insensitive micelles. Additionally, an in vivo study confirmed the efficacy of PTX-loaded micelles in tumor-bearing mice with superior antitumor efficacy and diminished systemic toxicity when compared with the redox-insensitive micelles and a PTX solution. These results demonstrate the potential of redox-sensitive HECS-ss-OA micelles for intracellular trafficking of lipophilic anticancer drugs.
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Affiliation(s)
- Meirong Huo
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Yao Liu
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Lei Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Tingjie Yin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Chen Qin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Yanyu Xiao
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Lifang Yin
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
| | - Jiyong Liu
- Department of Pharmacy, Changhai Hospital, The Second Military Medical University , Shanghai 200433, China
| | - Jianping Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University , 24 Tongjiaxiang, Nanjing 210009, China
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