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A lysosomal-targeted fluorescent probe for detecting Cu2+

Paper ID Volume ID Publish Year Pages File Format Full-Text
26747 43974 2012 5 PDF Available
Title
A lysosomal-targeted fluorescent probe for detecting Cu2+
Abstract

Copper in lysosomes is closely related to age and development of liver damage. A new fluorescent lysosomes-specific Cu2+-sensing probe was synthesized, and used for optical imaging in HL-7702 and HepG2 cells. Based on the difference in structure between spirocyclic (non-fluorescent) and open-cycle (fluorescent) forms, the probes showed an 80-fold fluorescence increase upon the addition of Cu2+. The probe showed excellent selectivity toward copper ion over other metal ions. A good linear correlation was obtained between fluorescent intensity and the concentrations of Cu2+ in the range from 1.0 × 10−7 to 5.5 × 10−6 M, with the detection limit as low as 80 nM. In particular, without appended targeting moieties, it can efficiently accumulate in lysosomes of normal liver and hepatoma cell lines, where it can specifically respond to Cu2+ level fluctuations in living cells, including adscititious and endogenous Cu2+ level decrease upon ascorbate-reduction, and it displayed good membrane-permeability and low cytotoxicity.

► The first probe for fluorescence imaging of Cu2+ in lysosomes of living cells. ► The probe can selectively detect labile Cu2+ in living cells. ► The probe can well monitor adscititious and endogenous Cu2+ level fluctuations.

Keywords
Fluorescent probe; Lysosomes; Cu2+; Confocal imaging
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A lysosomal-targeted fluorescent probe for detecting Cu2+
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 249, 1 December 2012, Pages 36–40
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us