Fluorescent signal durability
of cells stained with DACT-1, CTV, and CFDA-SE with varying
incubation times after staining
protocol. (A) Schematic representation of the intracellular reaction
of DACTs. (B) Confocal images obtained from treating HeLa cells with
DACT-1 (10 μM) for 10 min. Photoactivation and
read-out were achieved using 405 nm (1 s, 30 mW) and 561 nm lasers
(0.5 s, 120 mW), respectively. (C) Comparison of fluorescence images
of cells incubated with DACT-1 (10 μM for 30 min
and photoirradiated), CTV, or CFDA-SE (in a solution of 5 μM
dye in FluoroBright, for 30 min) individually, washed and imaged after
10 min and 1, 12, and 27 h using confocal microscopy. Representative
images from three independent experiments are displayed. Scale bars
= 10 μm.