Fiche publication
Date publication
février 2020
Journal
Bioconjugate chemistry
Auteurs
Membres identifiés du Cancéropôle Est :
Dr KLYMCHENKO Andrey
Tous les auteurs :
Collot M, Boutant E, Fam KT, Danglot L, Klymchenko AS
Lien Pubmed
Résumé
The plasma membrane (PM) plays a major role in many biological processes; therefore its proper fluorescence staining is required in bioimaging. Among the commercially available PM probes, styryl dye FM1-43 is one of the most widely used. In this work, we demonstrated that fine chemical modifications of FM1-43 can dramatically improve the PM staining. The newly developed probes, SP-468 and SQ-535 were found to display enhanced photophysical properties (reduced crosstalk, higher brightness, improved photostability) and unlike FM1-43, provided excellent and immediate PM staining in 5 different mammalian cell types including neurons (primary culture and tissue imaging). Tacking advantage of these features we successfully used SP-468 in STED super resolution neuronal imaging. Additionally, we showed that the new probes displayed differences in their internalization pathways compared to their parent FM1-43. Finally, we demonstrated that the modifications made to FM1-43 did not impair the ability of the new probes to stain the PM of plant cells. Overall, this work presents new useful probes for PM imaging in cells and tissues and provides insights on the molecular design of new PM targeting molecules.
Référence
Bioconjug. Chem.. 2020 Feb 13;: