Synthesis and Evaluation of a Star Amphiphilic Block Copolymer from Poly(ε-caprolactone) and Poly(ethylene glycol) as a Potential Drug Delivery Carrier

2005 ◽  
Vol 16 (2) ◽  
pp. 397-405 ◽  
Author(s):  
Fei Wang ◽  
Tatiana K. Bronich ◽  
Alexander V. Kabanov ◽  
R. David Rauh ◽  
Jacques Roovers
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Ethylene Glycol ◽  
Amphiphilic Block Copolymer ◽  
Potential Drug ◽  
Poly Ethylene Glycol ◽  
Drug Delivery Carrier ◽  
Poly Ethylene

Methoxy-Poly(ethylene glycol)-block-Poly(ε-caprolactone) Bearing Pendant Aldehyde Groups as pH-Responsive Drug Delivery Carrier

2013 ◽  
Vol 66 (12) ◽  
pp. 1576 ◽  
Author(s):  
Gejun Ma ◽  
Deshan Li ◽  
Ji Wang ◽  
Xuefei Zhang ◽  
Haoyu Tang
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Ethylene Glycol ◽  
In Vitro Release ◽  
Amphiphilic Block Copolymer ◽  
Poly Ethylene Glycol ◽  
Ph Change ◽  
Poly Ethylene ◽  
Aldehyde Groups

A biodegradable amphiphilic block copolymer of methoxy poly(ethylene glycol)-block-poly(ϵ-caprolactone) bearing pendant aldehyde groups was synthesised by a combination of ring-opening polymerisation and thio-bromo ‘click’ chemistry. The free aldehyde groups on the copolymer were reacted with hydrophobic payloads (p-methoxylaniline as a model drug) by a benzoic–imine linker, which was responsive to pH change. NMR, FTIR, and gel permeation chromatography analysis confirmed the copolymer structures. In vitro release studies revealed that under acid stimulus, hydrolysis of the benzoic–imine bond resulted in a rapid drug release. This new amphiphilic block copolymer is expected to have promising applications in biodegradable controlled drug delivery systems.

Synthesis and self-assembly behaviour of poly(Nα-Boc-l-tryptophan)-block-poly(ethylene glycol)-block-poly(Nα-Boc-l-tryptophan)

RSC Advances ◽  
2016 ◽  
Vol 6 (29) ◽  
pp. 24142-24153
Author(s):  
Andreea S. Voda ◽  
Kevin Magniez ◽  
Nisa V. Salim ◽  
Cynthia Wong ◽  
Qipeng Guo
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Potential Drug ◽  
Poly Ethylene Glycol ◽  
Drug Delivery Applications ◽  
Poly Ethylene ◽  
First Time

We report for the first time the use of Nα-Boc-l-tryptophan for the synthesis of amphiphilic BAB triblock copolymers for potential drug delivery applications.

Design of interpenetrating chitosan and poly(ethylene glycol) sponges for potential drug delivery applications

2017 ◽  
Vol 170 ◽  
pp. 166-175 ◽  
Author(s):  
Lisa Racine ◽  
Guillaume Costa ◽  
Eric Bayma-Pecit ◽  
Isabelle Texier ◽  
Rachel Auzély-Velty
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Potential Drug ◽  
Poly Ethylene Glycol ◽  
Drug Delivery Applications ◽  
Poly Ethylene

A block copolymer of zwitterionic polyphosphoester and polylactic acid for drug delivery

2015 ◽  
Vol 3 (7) ◽  
pp. 1105-1113 ◽  
Author(s):  
Rong Sun ◽  
Xiao-Jiao Du ◽  
Chun-Yang Sun ◽  
Song Shen ◽  
Yang Liu ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Ethylene Glycol ◽  
Polylactic Acid ◽  
Anticancer Drug ◽  
Poly Ethylene Glycol ◽  
Anticancer Drug Delivery ◽  
Poly Ethylene

Zwitterionic polyphosphoester containing polymers are synthesized and evaluated as an alternative to poly(ethylene glycol) block copolymers for anticancer drug delivery.

Acid-labile poly(ethylene glycol) shell of hydrazone-containing biodegradable polymeric micelles facilitating anticancer drug delivery

2018 ◽  
Vol 33 (2) ◽  
pp. 119-133 ◽  
Author(s):  
Jing Xu ◽  
Benkai Qin ◽  
Shujuan Luan ◽  
Peilan Qi ◽  
Yingying Wang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Ethylene Glycol ◽  
Drug Delivery System ◽  
Delivery System ◽  
Ph Sensitive ◽  
Drug Formulation ◽  
Poly Ethylene Glycol ◽  
Block Polymer ◽  
Poly Ethylene

Biodegradable pH-sensitive amphiphilic block polymer (mPEG-Hyde-PLGA) was synthesized via ring-opening polymerization, initiated from a hydrazone-containing macro-initiator. In this way, a pH-sensitive hydrazone bond was inserted into the backbone of block copolymer, linking hydrophilic poly(ethylene glycol) segment and hydrophobic poly(lactic-co-glycolic acid) segment. The copolymer self-assembled to form stable micelles with mean diameters below 100 nm and served as a drug delivery system for doxorubicin, with drug loading content of 5.3%. pH sensitivity of the hydrazone-containing micelles was investigated by changes in diameter and size distribution observed by dynamic light scattering measurements when the micelles were encountered to acidic medium. Small pieces and larger aggregates were found by transmission electron microscopy resulting from the disassociation of the micelles in acidic conditions. It was also noted that doxorubicin release from the pH-sensitive micelles is significantly faster at pH 4.0 and pH 5.0 compared to pH 7.4, while almost no difference was detected in the case of pH non-sensitive micelles. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assays on HepG-2 and MCF-7 cells revealed that doxorubicin-loaded pH-sensitive micelles had higher antitumor activity than pH-insensitive ones. This pH-sensitive drug delivery system based on hydrazone-containing block copolymer has been proved as a promising drug formulation for cancer therapy.

Sign in / Sign up

Export Citation Format

Share Document