Dynamic tracing using ultra-bright labelling and multi-photon microscopy identifies endothelial uptake of poloxamer 188 coated poly(lactic-co-glycolic acid) nano-carriers in vivo.

Fiche publication

Date publication

décembre 2021

Journal

Nanomedicine : nanotechnology, biology, and medicine

Auteurs

Membres identifiés du Cancéropôle Est :
Dr KLYMCHENKO Andrey

Tous les auteurs :
Khalin I, Severi C, Heimburger D, Wehn A, Hellal F, Reisch A, Klymchenko AS, Plesnila N

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/34915181

Résumé

The potential of poly(lactic-co-glycolic acid) (PLGA) to design nanoparticles (NPs) and target the central nervous system remains to be exploited. In the current study we designed fluorescent 70-nm PLGA NPs, loaded with bulky fluorophores, thereby making them significantly brighter than quantum dots in single-particle fluorescence measurements. The high brightness of NPs enabled their visualization by intravital real-time 2-photon microscopy. Subsequently, we found that PLGA NPs coated with pluronic F-68 circulated in the blood substantially longer than uncoated NPs and were taken up by cerebro-vascular endothelial cells. Additionally, confocal microscopy revealed that coated PLGA NPs were present in late endothelial endosomes of cerebral vessels within 1hour after systemic injection and were more readily taken up by endothelial cells in peripheral organs. The combination of ultra-bright NPs and in vivo imaging may thus represent a promising approach to reduce the gap between development and clinical application of nanoparticle-based drug carriers.