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2016 ; 6
(ä): 26385
Nephropedia Template TP
Qian L
; Zhang CW
; Mao Y
; Li L
; Gao N
; Lim KL
; Xu QH
; Yao SQ
Sci Rep
2016[May]; 6
(ä): 26385
PMID27210613
show ga
Caspases work as a double-edged sword in maintaining cell homeostasis. Highly
regulated caspase activities are essential during animal development, but
dysregulation might lead to different diseases, e.g. extreme caspase activation
is known to promote neurodegeneration. At present, visualization of caspase
activation has mostly remained at the cellular level, in part due to a lack of
cell-permeable imaging probes capable of direct, real-time investigations of
endogenous caspase activities in deep tissues. Herein, we report a suite of
two-photon, small molecule/peptide probes which enable sensitive and dynamic
imaging of individual caspase activities in neurodegenerative models under
physiological conditions. With no apparent toxicity and the ability of imaging
endogenous caspases both in different subcellular organelles of mammalian cells
and in brain tissues, these probes serve as complementary tools to conventional
histological analysis. They should facilitate future explorations of caspases at
molecular, cellular and organism levels and inspire development of novel
two-photon probes against other enzymes.