Keyword search (3,448 papers available)


Microfluidic Shear Processing Control of Biological Reduction Stimuli-Responsive Polymer Nanoparticles for Drug Delivery.

Author(s): Huang Y, Jazani AM, Howell EP, Reynolds LA, Oh JK, Moffitt MG

We demonstrate microfluidic manufacturing of glutathione (GSH)-responsive polymer nanoparticles (PNPs) with controlled in vitro pharmacological properties for selective drug delivery. This work leverages previous fundamental work on microfluidic control of ...

Article GUID: 33455300
Controlled Microfluidic Synthesis of Biological Stimuli-Responsive Polymer Nanoparticles.

Author(s): Huang Y, Moini Jazani A, Howell EP, Oh JK, Moffitt MG

Microfluidic flow-directed self-assembly of biological stimuli-responsive block copolymers is demonstrated with dual-location cleavable linkages at the junction between hydrophilic and hydrophobic blocks and on pendant group within the hydrophobic blocks. O...

Article GUID: 31820915
Direct Polymerization Approach to Synthesize Acid-Degradable Block Copolymers Bearing Imine Pendants for Tunable pH-Sensitivity and Enhanced Release.

Author(s): Hu X, Oh JK

The development of effective approaches to synthesize smart amphiphilic block copolymers (ABPs) exhibiting acid-responsive degradation through the cleavage of acid-labile imine bonds is extensively explored for controlled release of encapsulated biomolecule...

Article GUID: 32964550
Self-Healable Reprocessable Triboelectric Nanogenerators Fabricated with Vitrimeric Poly(hindered Urea) Networks.

Author(s): Patel T, Kim MP, Park J, Lee TH, Nellepalli P, Noh SM, Jung HW, Ko H, Oh JK

In recent years, the advent of highly deformable and healable electronics is exciting and promising for next-generation electronic devices. In particular, self-healable triboelectric nanogenerators (SH-TENGs) serve as promising candidates based on the combi...

Article GUID: 32840992
Dual Reduction/Acid-Responsive Disassembly and Thermoresponsive Tunability of Degradable Double Hydrophilic Block Copolymer.

Author(s): Maruya-Li K, Shetty C, Moini Jazani A, Arezi N, Oh JK

ACS Omega. 2020 Feb 25;5(7):3734-3742 Authors: Maruya-Li K, Shetty C, Moini Jazani A, Arezi N, Oh JK

Article GUID: 32118189
Facile Strategies to Synthesize Dual Location Dual Acidic pH/Reduction-Responsive Degradable Block Copolymers Bearing Acetal/Disulfide Block Junctions and Disulfide Pendants.

Author(s): Jazani AM, Arezi N, Maruya-Li K, Jung S, Oh JK

ACS Omega. 2018 Aug 31;3(8):8980-8991 Authors: Jazani AM, Arezi N, Maruya-Li K, Jung S, Oh JK

Article GUID: 31459031
Reduction-Responsive Sheddable Carbon Nanotubes Dispersed in Aqueous Solution.

Author(s): An SY, Sun S, Oh JK

Macromol Rapid Commun. 2016 Apr;37(8):705-10 Authors: An SY, Sun S, Oh JK

Article GUID: 26890479
Intracellular Delivery of Colloidally Stable Core-Cross-Linked Triblock Copolymer Micelles with Glutathione-Responsive Enhanced Drug Release for Cancer Therapy.

Author(s): Biswas D, An SY, Li Y, Wang X, Oh JK

Mol Pharm. 2017 08 07;14(8):2518-2528 Authors: Biswas D, An SY, Li Y, Wang X, Oh JK

Article GUID: 28207270
Multiblock Copolymer-Based Dual Dynamic Disulfide and Supramolecular Crosslinked Self-Healing Networks.

Author(s): An SY, Noh SM, Oh JK

Macromol Rapid Commun. 2017 Apr;38(8): Authors: An SY, Noh SM, Oh JK

Article GUID: 28221703
Enhancing targeted antibiotic therapy via pH responsive solid lipid nanoparticles from an acid cleavable lipid.

Author(s): Kalhapure RS, Sikwal DR, Rambharose S, Mocktar C, Singh S, Bester L, Oh JK, Renukuntla J, Govender T

Nanomedicine. 2017 Aug;13(6):2067-2077 Authors: Kalhapure RS, Sikwal DR, Rambharose S, Mocktar C, Singh S, Bester L, Oh JK, Renukuntla J, Govender T

Article GUID: 28434930
Stimulus-Responsive Degradable Polylactide-Based Block Copolymer Nanoassemblies for Controlled/Enhanced Drug Delivery.

Author(s): Bawa KK, Oh JK

Mol Pharm. 2017 08 07;14(8):2460-2474 Authors: Bawa KK, Oh JK

Article GUID: 28493712
Polymers in Drug Delivery: Chemistry and Applications.

Author(s): Oh JK

Mol Pharm. 2017 08 07;14(8):2459 Authors: Oh JK PMID: 28780874 [PubMed - indexed for MEDLINE]

Article GUID: 28780874
Thermally Labile Self-Healable Branched Gel Networks Fabricated by New Macromolecular Engineering Approach Utilizing Thermoreversibility.

Author(s): Jung S, Patel T, Oh JK

Macromol Rapid Commun. 2018 Mar;39(5): Authors: Jung S, Patel T, Oh JK

Article GUID: 29210490
Microfluidic Assembly To Synthesize Dual Enzyme/Oxidation-Responsive Polyester-Based Nanoparticulates with Controlled Sizes for Drug Delivery.

Author(s): Hong SH, Patel T, Ip S, Garg S, Oh JK

Langmuir. 2018 03 13;34(10):3316-3325 Authors: Hong SH, Patel T, Ip S, Garg S, Oh JK

Article GUID: 29485889
Dual disassembly and biological evaluation of enzyme/oxidation-responsive polyester-based nanoparticulates for tumor-targeting delivery.

Author(s): Hong SH, Larocque K, Jaunky DB, Piekny A, Oh JK

Colloids Surf B Biointerfaces. 2018 Dec 01;172:608-617 Authors: Hong SH, Larocque K, Jaunky DB, Piekny A, Oh JK

Article GUID: 30223243
PLA-Based Triblock Copolymer Micelles Exhibiting Dual Acidic pH/Reduction Responses at Dual Core and Core/Corona Interface Locations.

Author(s): Bawa KK, Jazani AM, Shetty C, Oh JK

Macromol Rapid Commun. 2018 Dec;39(24):e1800477 Authors: Bawa KK, Jazani AM, Shetty C, Oh JK

Article GUID: 30286258
Multifunctional Self-Assembled Supernanoparticles for Deep-Tissue Bimodal Imaging and Amplified Dual-Mode Heating Treatment.

Author(s): Yang F, Skripka A, Tabatabaei MS, Hong SH, Ren F, Benayas A, Oh JK, Martel S, Liu X, Vetrone F, Ma D

ACS Nano. 2019 Jan 22;13(1):408-420 Authors: Yang F, Skripka A, Tabatabaei MS, Hong SH, Ren F, Benayas A, Oh JK, Martel S, Liu X, Vetrone F, Ma D

Article GUID: 30604607
Title:Dual disassembly and biological evaluation of enzyme/oxidation-responsive polyester-based nanoparticulates for tumor-targeting delivery.
Authors:Hong SH,  Larocque K,  Jaunky DB,  Piekny A,  Oh JK
Link:https://www.ncbi.nlm.nih.gov/pubmed/30223243?dopt=Abstract
Category:Colloids Surf B Biointerfaces
PMID:30223243
Dept Affiliation: CHEMBIOCHEM
1 Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H4B 1R6, Canada.
2 Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H4B 1R6, Canada. Electronic address: john.oh@concordia.ca.

Description:

Dual disassembly and biological evaluation of enzyme/oxidation-responsive polyester-based nanoparticulates for tumor-targeting delivery.

Colloids Surf B Biointerfaces. 2018 Dec 01;172:608-617

Authors: Hong SH, Larocque K, Jaunky DB, Piekny A, Oh JK

Abstract

Polyester-based nanoparticulates (NPs) are ideal nanocarriers for intracellular delivery of anticancer drugs because of their biocompatibility. However, an on-going challenge is the controlled and enhanced release of encapsulated therapeutics in response to unique changes that occur within cancer cells. Herein, we report the versatility of dual responses to enzymatic and oxidative reactions found in cancer cells toward the development of polyester-NPs as effective tumor-targeting intracellular nanocarriers. A facile nanoprecipitation method allows for the preparation of hydrophobic cores composed of novel polyester designed with esterase-responsive ester groups and oxidation-responsive sulfide linkages on their backbones, physically stabilized with poly(ethylene glycol)-based polymeric shells. The formed core/shell-type NPs with a diameter of 120?nm exhibit excellent colloidal stability in physiological conditions and in the presence of serum proteins. When exposed to esterase and hydrogen peroxide, NP integrity is disrupted, leading to the enhanced release of encapsulated doxorubicin, confirmed by dynamic light scattering and spectroscopic analysis. Combined results from epifluorescence microscopy, confocal laser scanning microscopy, flow cytometry, and cell viability demonstrate that doxorubicin-loaded NPs reveal rapid penetration and enhanced intracellular release of doxorubicin, thus inhibiting tumor progression. Importantly, the cellular uptake of doxorubicin-loaded core/shell NPs primarily via caveolae-dependent mechanism promotes their use in targeting a broad spectrum of cancers.

PMID: 30223243 [PubMed - indexed for MEDLINE]