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Subtle and unexpected role of PEG in tuning the penetration mechanisms of PLA-based nano-formulations into intact and impaired skin
(Elsevier, 2019-02-27)
We present a systematic study of the role of poly(ethylene glycol) (PEG) content in NPs on drug skin absorption. Cholecalciferol-loaded NPs of 100 nm of diameter were prepared by flash nanoprecipitation from PLA-b-PEG ...
Unified scaling of the structure and loading of nanoparticles formed via diffusion-limited coalescence
(American Chemical Society, 2018-04-30)
The present study establishes the scaling laws describing the structure of spherical nanoparticles formed by diffusion-limited coalescence. We produced drug-loaded nanoparticles from a poly(ethylene glycol)-poly(d,l-lactic ...
Nanostructure des particules polymériques : aspects physiques, chimiques et biologiques
(2016-03-30)
Les nanotechnologies appliquées aux sciences pharmaceutiques ont pour but d’améliorer l’administration de molécules actives par l’intermédiaire de transporteurs nanométriques. Parmi les différents types de véhicules proposés ...
Effect of surface chemistry of polymeric nanoparticles on cutaneous penetration of cholecalciferol
(Elsevier, 2018-10-11)
We investigated the influence of nanoparticle (NP) surface composition on different aspects of skin delivery of a lipophilic drug: chemical stability, release and skin penetration. Cholecalciferol was chosen as a labile ...
(In)stability of ligands at the surface of inorganic nanoparticles : a forgotten question in nanomedicine?
(Elsevier, 2022-06-14)
Multiple inorganic nanoparticles (NPs) are currently being developed for nanomedicine. Various core materials and shapes are explored, but they all display a common hybrid structure, with organic ligands on their surface. ...
Nanoparticle shell structural cues drive in vitro transport properties, tissue distribution and brain accessibility in Zebrafish
(Elsevier, 2021-08-24)
Zwitterion polymers with strong antifouling properties have been suggested as the prime alternative to polyethylene glycol (PEG) for drug nanocarriers surface coating. It is believed that PEG coating shortcomings, such as ...
Nanoparticle heterogeneity : an emerging structural parameter 2 influencing particle fate in biological media?
(Royal Society of Chemistry, 2018-11-27)
Drug nanocarriers’ surface chemistry is often presumed to be uniform. For instance, the polymer surface coverage and distribution of ligands on nanoparticles are described with averaged values obtained from quantification ...
Assessment of PEG on Polymeric Particles Surface, a Key Step in Drug Carrier Translation
(2014-07)
Injectable drug nanocarriers have greatly benefited in their clinical development from the addition of a superficial hydrophilic corona to improve their cargo pharmacokinetics. The most studied and used polymer for this ...
Effect of Polymer Architecture on the Structural and Biophysical Properties of PEG-PLA Nanoparticles
(2015-05-01)
Polymers made of poly(ethylene glycol) chains grafted to poly(lactic acid) chains (PEG-g-PLA) were used to produce stealth drug nanocarriers. A library of comb-like PEG-g-PLA polymers with different PEG grafting densities ...
Drug-loaded nanocarriers : passive targeting and crossing of biological barriers
(2012-12)
Poor bioavailability and poor pharmacokinetic characteristics are some of the leading causes of drug development failure. Therefore, poorly-soluble drugs, fragile proteins or nucleic acid products may benefit from their ...