On-demand shape transformation of polymer vesicles via site-specific isomerization of hydrazone photoswitches in monodisperse hydrophobic oligomers

2021 ◽  
Author(s):  
Valene Wang ◽  
Jiwon Kim ◽  
Junyoung Kim ◽  
Seul Woo Lee ◽  
Kyoung Taek Kim
Keyword(s):  
Drug Delivery ◽  
Block Copolymers ◽  
Conformational Change ◽  
Self Assembly ◽  
Shape Control ◽  
Shape Transformation ◽  
Site Specific ◽  
On Demand ◽  
Polymer Vesicles

The shape control of nanostructures formed by the solution self-assembly of block copolymers is of significance for drug delivery. In particular, site-specific perturbation resulting in the conformational change of the...

scholarly journals Polymerisation-induced self-assembly (PISA) as a straightforward formulation strategy for stimuli-responsive drug delivery systems and biomaterials: recent advances

2021 ◽  
Vol 9 (1) ◽  
pp. 38-50
Author(s):  
Hien Phan ◽  
Vincenzo Taresco ◽  
Jacques Penelle ◽  
Benoit Couturaud
Keyword(s):  
Drug Delivery ◽  
Block Copolymers ◽  
Drug Release ◽  
Self Assembly ◽  
Drug Delivery Systems ◽  
Amphiphilic Block Copolymers ◽  
Stimuli Responsive ◽  
Site Specific ◽  
On Demand ◽  
Redox Agents

Stimuli-responsive amphiphilic block copolymers obtained by PISA have emerged as promising nanocarriers for enhancing site-specific and on-demand drug release in response to a range of stimuli such as pH, redox agents, light or temperature.

scholarly journals Tuning Size and Morphology of mPEG-b-p(HPMA-Bz) Copolymer Self-Assemblies Using Microfluidics

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2572
Author(s):  
Jaleesa Bresseleers ◽  
Mahsa Bagheri ◽  
Coralie Lebleu ◽  
Sébastien Lecommandoux ◽  
Olivier Sandre ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Size Difference ◽  
Flow Rates ◽  
Polymer Vesicles ◽  
Attractive Option ◽  
Self Assembled ◽  
Size And Morphology ◽  
Poly Ethylene ◽  
Careful Design

The careful design of nanoparticles, in terms of size and morphology, is of great importance to developing effective drug delivery systems. The ability to precisely tailor nanoparticles in size and morphology during polymer self-assembly was therefore investigated. Four poly(ethylene glycol)-b-poly(N-2-benzoyloxypropyl methacrylamide) mPEG-b-p(HPMA-Bz) block copolymers with a fixed hydrophilic block of mPEG 5 kDa and a varying molecular weight of the hydrophobic p(HPMA-Bz) block (A: 17.1, B: 10.0, C: 5.2 and D: 2.7 kDa) were self-assembled into nanoparticles by nanoprecipitation under well-defined flow conditions, using microfluidics, at different concentrations. The nanoparticles from polymer A, increased in size from 55 to 90 nm using lower polymer concentrations and slower flow rates and even polymer vesicles were formed along with micelles. Similarly, nanoparticles from polymer D increased in size from 35 to 70 nm at slower flow rates and also formed vesicles along with micelles, regardless of the used concentration. Differently, polymers B and C mainly self-assembled into micelles at the different applied flow rates with negligible size difference. In conclusion, this study demonstrates that the self-assembly of mPEG-b-p(HPMA-Bz) block copolymers can be easily tailored in size and morphology using microfluidics and is therefore an attractive option for further scaled-up production activities.

scholarly journals A bio-orthogonal functionalization strategy for site-specific coupling of antibodies on vesicle surfaces after self-assembly

2020 ◽  
Vol 11 (2) ◽  
pp. 527-540 ◽  
Author(s):  
Meiyu Gai ◽  
Johanna Simon ◽  
Ingo Lieberwirth ◽  
Volker Mailänder ◽  
Svenja Morsbach ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Self Assembly ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Site Specific ◽  
Self Assembled

Attaching targeting ligands on the surface of self-assembled drug delivery systems is one of the key requests for a controlled transport of the drug to a desired location.

Formation of polymer vesicles by simultaneous chain growth and self-assembly of amphiphilic block copolymers

2009 ◽  
pp. 2887 ◽  
Author(s):  
Guillaume Delaittre ◽  
Charlotte Dire ◽  
Jutta Rieger ◽  
Jean-Luc Putaux ◽  
Bernadette Charleux
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Amphiphilic Block Copolymers ◽  
Chain Growth ◽  
Polymer Vesicles

Nanoparticles from Polylactide and Polyether Block Copolymers: Formation, Properties, Encapsulation, and Release of Pyrene—Fluorescent Model of Hydrophobic Drug

2006 ◽  
Vol 6 (9) ◽  
pp. 3242-3251 ◽  
Author(s):  
Stanislaw Slomkowski ◽  
Mariusz Gadzinowski ◽  
Stanislaw Sosnowski ◽  
Izabela Radomska-Galant ◽  
Andrea Pucci ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Conformational Change ◽  
Self Assembly ◽  
Uv Light ◽  
Critical Aggregation Concentration ◽  
Diameter Distribution ◽  
Hydrophobic Drug ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Polylactide-b-polyglycidol-b-poly(ethylene oxide) terpolymers and their derivatives with carboxyl and 4-(phenylazo)phenyl labels in polyglycidol blocks were used for formation of nanoparticles. Nanoparticles were produced by self assembly of terpolymer macromolecules in water above the critical aggregation concentration and by dialysis of terpolymer solutions in 1,4-dioxane against water. For terpolymers with 4-(phenylazo)phenyl labels critical aggregation concentrations increased after irradiation with UV light (300 < λ < 400 nm) inducing conformational change of the label from trans- to cis-conformation. Diameters of nanoparticles obtained by self-assembly of macromolecules ranged from 20 to 44 nm. Dialysis yielded nanoparticles with bimodal diameter distribution. One fraction had diameters below 35 nm and diameters of the second fraction were in a range from 350 to 2300 nm, depending on terpolymer structure. Mixtures of terpolymers with poly(L,L-lactide) and poly(D,D-lactide) blocks yielded nanoparticles with diameters from 350 to 440 nm. Pyrene was incorporated into nanoparticles by partition between solution and nanoparticles or directly during particle formation by dialysis. Monitoring of pyrene release from nanoparticles suggests that a fraction of this compound was entrapped into the polylactide core whereas the remaining one was located in the polyether rich shell. The release from shells is faster for nanoparticles made from copolymers with carboxyl labels in polyglycidol blocks.

scholarly journals H2S gasotransmitter-responsive polymer vesicles

2016 ◽  
Vol 7 (3) ◽  
pp. 2100-2105 ◽  
Author(s):  
Qiang Yan ◽  
Wei Sang
Keyword(s):  
Drug Delivery ◽  
Hydrogen Sulfide ◽  
Cell Signaling ◽  
Diblock Copolymer ◽  
Targeted Drug Delivery ◽  
Self Assembly ◽  
Signaling Molecule ◽  
Polymer Vesicles ◽  
Responsive Polymer ◽  
Targeted Drug

A type of new polymeric vesicle self-assembly byo-azidomethylbenzoate-containing diblock copolymer can respond to the cell signaling molecule hydrogen sulfide (H2S). The intracellular H2S gasotransmitter can trigger biomimetic polymersome disruption for targeted drug delivery.

scholarly journals Formation of Giant Polymer Vesicles by Simple Double Emulsification using Block Copolymers as the Sole Surfactant

Soft Matter ◽  
2021 ◽  
Author(s):  
Mazarine Houbrechts ◽  
Lucas Caire da Silva ◽  
Anitha Ethirajan ◽  
Katharina Landfester
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Shell Structure ◽  
The Self ◽  
Amphiphilic Block Copolymers ◽  
Core Shell ◽  
The Core ◽  
Polymer Vesicles ◽  
Core Shell Structure ◽  
Double Emulsification

Polymer vesicles that mimic the function of cell membranes can be obtained through the self-assembly of amphiphilic block copolymers. The cell-like characteristics of polymer vesicles, such as the core-shell structure,...

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