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Enzymatic synthesis of PEG-poly(amine-co-thioether esters) as highly efficient pH and ROS dual-responsive nanocarriers for anticancer drug delivery
- Source :
- Journal of materials chemistry. B. 7(4)
- Publication Year :
- 2020
-
Abstract
- Novel multifunctional drug nanocarriers have been successfully fabricated from a new type of enzymatically synthesized, biodegradable block copolymer, PEG–poly(ω-pentadecalactone-co-N-methyldiethyleneamine-co-3,3′-thiodipropionate) (PEG–PPMT), which was responsive to tumor-relevant acidic pH (5.0–6.5) and intracellular reactive oxygen species (ROS) of tumor cells. The PEG–PPMT copolymers could self-assemble to form nano-scaled particles in aqueous solutions, which are stable in physiological solutions, but swell substantially upon reducing the pH from 7.4 to 5.0 and/or in the presence of ROS on account of the protonation of the tertiary amino groups and oxidation of the thioether groups, causing a hydrophobic to hydrophilic transition in the nanoparticle cores. Consistently, docetaxel (DTX) encapsulated in PEG–PPMT nanoparticles can be triggered in a synergistic manner by acidic pH and a high-ROS environment in tumor cells to release the hydrophobic drug at accelerated rates for efficient tumor growth inhibition. In particular, DTX encapsulated in PEG–PPMT–11% PDL and PEG–PPMT–28% PDL nanoparticles exhibit extraordinarily enhanced potency (95% and 93% tumor-inhibiting efficiency, respectively) in inhibiting the growth of ROS-rich CT-26 tumors xenografted in mice. Importantly, biosafety analyses show minimal toxicity of DTX-loaded PEG–PPMT nanoparticles toward normal organs including liver and kidneys during the in vivo antitumor treatments. These results demonstrate that the PEG–PPMT nanoparticles are promising pH and ROS dual-responsive multifunctional nanocarriers for tumor site specific, controlled release of anticancer drugs to treat ROS-rich tumors.
- Subjects :
- Biomedical Engineering
Nanoparticle
Antineoplastic Agents
02 engineering and technology
Docetaxel
010402 general chemistry
01 natural sciences
Polyethylene Glycols
chemistry.chemical_compound
Mice
Drug Delivery Systems
Thioether
In vivo
Neoplasms
PEG ratio
Animals
Humans
General Materials Science
Drug Carriers
Mice, Inbred BALB C
Aqueous solution
Chemistry
General Chemistry
General Medicine
021001 nanoscience & nanotechnology
Controlled release
Combinatorial chemistry
Xenograft Model Antitumor Assays
0104 chemical sciences
Nanoparticles
Amine gas treating
Nanocarriers
0210 nano-technology
HeLa Cells
Subjects
Details
- ISSN :
- 20507518
- Volume :
- 7
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Journal of materials chemistry. B
- Accession number :
- edsair.doi.dedup.....7ba57a41b875b64e62781922ee0521ea