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Wei Y, Zhang C, Zhang M, Niu Q, Hui F, Liu Z, Xu X. Insight of Synergistic Effect between CPP and Cargo on the Facilitation Mechanisms of R7-PTX Translocation: Experiments and Molecular Simulations. Eur J Pharm Sci 2021; 161:105790. [PMID: 33689859 DOI: 10.1016/j.ejps.2021.105790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/16/2021] [Accepted: 03/03/2021] [Indexed: 11/17/2022]
Abstract
In our previous study, a novel cell penetrating peptide (CPP) R7 (Arg-Arg-Arg-Arg-Arg-Trp-Trp, RRRRRWW) has been developed to help cellular internalization of paclitaxel (PTX) through the non-covalent interaction with CPP. However, the facilitation mechanism of R7 mediated PTX translocation is not clear. Here the uptake pathways of R7 and R7-PTX were investigated by in vitro test and molecular simulations. In vitro experiments reveal that both R7 and R7-PTX complex translocate through the direct translocation and clathrin mediated endocytosis and associate with the macropinocytosis pathway at high CPP concentration. The translocation of R7(0.1 mM)-PTX complex further involves the lipid raft/caveolae mediated endocytosis. The simulation results show that the synergistic effect between R7 and PTX not only changes the penetration energy barrier but also activates the macropinocytosis and lipid raft/caveolae mediated pathway, resulting in the improvement in the translocation. The presence of heparin also improves the R7 and R7-PTX translocation. These studies provide a theoretical basis for understanding PTX delivery facilitated by the synergistic effect between CPP and cargo and paves a way for CPP design.
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Affiliation(s)
- Yuping Wei
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan Province, 473061, P.R. China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Caiying Zhang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan Province, 473061, P.R. China
| | - Man Zhang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan Province, 473061, P.R. China; Department of Oncology, Nanyang First People's Hospital, Henan Province, 473002, P.R. China
| | - Qionghong Niu
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan Province, 473061, P.R. China
| | - Fengli Hui
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan Province, 473061, P.R. China
| | - Zi Liu
- Biochemical Engineering Research Centre, Anhui University of Technology, Ma'anshan, Anhui Province, 243032, P.R. China; Department of Chemical Biology, School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui Province, 243032, P.R. China
| | - Xia Xu
- Biochemical Engineering Research Centre, Anhui University of Technology, Ma'anshan, Anhui Province, 243032, P.R. China; Department of Chemical Biology, School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui Province, 243032, P.R. China; State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China.
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