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Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery

On account of their excellent capacity to significantly improve the bioavailability and solubility of chemotherapy drugs, amphiphilic block copolymer-based micelles have been widely utilized for chemotherapy drug delivery. In order to further improve the antitumor ability and to also reduce undesire...

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Detalles Bibliográficos
Autores principales: Shuai, Qi, Cai, Yue, Zhao, Guangkuo, Sun, Xuanrong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7084196/
https://www.ncbi.nlm.nih.gov/pubmed/32182734
http://dx.doi.org/10.3390/ijms21051856
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author Shuai, Qi
Cai, Yue
Zhao, Guangkuo
Sun, Xuanrong
author_facet Shuai, Qi
Cai, Yue
Zhao, Guangkuo
Sun, Xuanrong
author_sort Shuai, Qi
collection PubMed
description On account of their excellent capacity to significantly improve the bioavailability and solubility of chemotherapy drugs, amphiphilic block copolymer-based micelles have been widely utilized for chemotherapy drug delivery. In order to further improve the antitumor ability and to also reduce undesired side effects of drugs, cell-penetrating peptides have been used to functionalize the surface of polymer micelles endowed with the ability to target tumor tissues. Herein, we first synthesized functional polyethylene glycol-polylactic acid (PEG-PLA) tethered with maleimide at the PEG section of the block polymer, which was further conjugated with a specific peptide, the transactivating transcriptional activator (TAT), with an approved capacity of aiding translocation across the plasma membrane. Then, TAT-conjugated, paclitaxel-loaded nanoparticles were self-assembled into stable nanoparticles with a favorable size of 20 nm, and displayed a significantly increased cytotoxicity, due to their enhanced accumulation via peptide-mediated cellular association in human breast cancer cells (MCF-7) in vitro. But when further used in vivo, TAT-NP-PTX showed an acceleration of the drug’s plasma clearance rate compared with NP-PTX, and therefore weakened its antitumor activities in the mice model, because of its positive charge, its elimination by the endoplasmic reticulum system more quickly, and its targeting effect on normal cells leading towards being more toxic. So further modification of TAT-NP-PTX to shield TAT peptide’s positive charges may be a hot topic to overcome the present dilemma.
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spelling pubmed-70841962020-03-24 Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery Shuai, Qi Cai, Yue Zhao, Guangkuo Sun, Xuanrong Int J Mol Sci Article On account of their excellent capacity to significantly improve the bioavailability and solubility of chemotherapy drugs, amphiphilic block copolymer-based micelles have been widely utilized for chemotherapy drug delivery. In order to further improve the antitumor ability and to also reduce undesired side effects of drugs, cell-penetrating peptides have been used to functionalize the surface of polymer micelles endowed with the ability to target tumor tissues. Herein, we first synthesized functional polyethylene glycol-polylactic acid (PEG-PLA) tethered with maleimide at the PEG section of the block polymer, which was further conjugated with a specific peptide, the transactivating transcriptional activator (TAT), with an approved capacity of aiding translocation across the plasma membrane. Then, TAT-conjugated, paclitaxel-loaded nanoparticles were self-assembled into stable nanoparticles with a favorable size of 20 nm, and displayed a significantly increased cytotoxicity, due to their enhanced accumulation via peptide-mediated cellular association in human breast cancer cells (MCF-7) in vitro. But when further used in vivo, TAT-NP-PTX showed an acceleration of the drug’s plasma clearance rate compared with NP-PTX, and therefore weakened its antitumor activities in the mice model, because of its positive charge, its elimination by the endoplasmic reticulum system more quickly, and its targeting effect on normal cells leading towards being more toxic. So further modification of TAT-NP-PTX to shield TAT peptide’s positive charges may be a hot topic to overcome the present dilemma. MDPI 2020-03-09 /pmc/articles/PMC7084196/ /pubmed/32182734 http://dx.doi.org/10.3390/ijms21051856 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shuai, Qi
Cai, Yue
Zhao, Guangkuo
Sun, Xuanrong
Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title_full Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title_fullStr Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title_full_unstemmed Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title_short Cell-Penetrating Peptide Modified PEG-PLA Micelles for Efficient PTX Delivery
title_sort cell-penetrating peptide modified peg-pla micelles for efficient ptx delivery
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7084196/
https://www.ncbi.nlm.nih.gov/pubmed/32182734
http://dx.doi.org/10.3390/ijms21051856
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AT sunxuanrong cellpenetratingpeptidemodifiedpegplamicellesforefficientptxdelivery