SCHEDULED MAINTENANCE
A new pentacyclic pyrylium fluorescent probe that responds to pH imbalance during apoptosis†
ab
Samrat
Ghosh,
a
Kaustabh K.
Maiti,
ab
Animesh
Samanta
*ac
and
Ayyappanpillai
Ajayaghosh
*ab
Abstract
Efficient fluorophores with easy synthetic routes and fast responses are of great importance in clinical diagnostics. Herein, we report a new, rigid pentacyclic pyrylium fluorophore, PS-OMe, synthesised in a single step by a modified Vilsmeier–Haack reaction. Insights into the reaction mechanism facilitated a new reaction protocol for the efficient synthesis of PS-OMe which upon demethylation resulted in a “turn-on” pH sensor, PS-OH. This new fluorescent probe has been successfully used to monitor intracellular acidification at physiological pH. From the fluorescence image analysis, we were able to quantify the intracellular dynamic pH change during apoptosis. This new pH probe is a potential chemical tool for screening, drug discovery and dose determination in cancer therapy.
- This article is part of the themed collections: Celebrating the Chemical Sciences in India - Leaders in the Field Symposium 2021, Celebrating the Chemical Sciences in India - Leaders in the Field Symposium 2020 and Celebrating 10 years of Chemical Science
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