2023 article
Photoactivatable fluorophores for bioimaging applications
COLLOIDAL NANOPARTICLES FOR BIOMEDICAL APPLICATIONS XVIII, Vol. 12395.
author keywords: BODIPYs; fluorescence imaging; PALM; photoactivatable fluorophores; photocages; SMLM; singlemolecule; tracking; super-resolution imaging
TL;DR:
A new family of synthetic photoactivatable fluorophores specifically designed for single-molecule localization microscopy, which combine a borondipyrromethene (BODIPY) fluorophore and an ortho-nitrobenzyl (ONB) photocage in a single molecular skeleton.
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UN Sustainable Development Goal Categories
3. Good Health and Well-being
(Web of Science)
Source: Web Of Science
Added: August 21, 2023
Single-molecule localization microscopy (SMLM) strategies based on fluorescence photoactivation permit the imaging of live cells with subdiffraction resolution and the high-throughput tracking of individual biomolecules in their interior. They rely predominantly on genetically-encoded fluorescent proteins to label live cells selectively and allow the sequential single-molecule localization of sparse populations of photoactivated fluorophores. Synthetic counterparts to these photoresponsive proteins are limited to a few remarkable examples at the present stage, mostly because of the daunting challenges in engineering biocompatible molecular constructs with appropriate photochemical and photophysical properties for live-cell SMLM. Our laboratory developed a new family of synthetic photoactivatable fluorophores specifically designed for these imaging applications. They combine a borondipyrromethene (BODIPY) fluorophore and an ortho-nitrobenzyl (ONB) photocage in a single molecular skeleton. The photoinduced ONB cleavage extends electronic delocalization to shift bathochromically the BODIPY absorption and emission bands. As a result, these photochemical transformations can be exploited to switch fluorescence on in a spectral region compatible with bioimaging applications and allow the localization of the photochemical product at the single-molecule level. Furthermore, our compounds can be delivered and operated in the interior of live cells to enable the visualization of organelles with nanometer resolution and the intracellular tracking of single photoactivated molecules.