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Zinquin AM *UltraPure grade*
Zinquin AM ester is a lipophilic, zinc-sensitive, cell-permeable fluorescent probe. It is retained in living cells because the AM ester is cleaved by cytosolic esterase to give Zinquin that carry a negative charge, preventing its efflux across the plasma membrane. Zinquin fluorescent probes may be loaded into cells by in the culture medium containing 5-40 μM Zinquin ethyl ester in PBS with calcium and magnesium (or in culture medium). Cells are normally incubated with the Zinquin ethyl ester for 15-30 minutes at 37 °C. Exact loading concentration, time and temperature depend on the purpose of the experiment and cell type, and so will need to be optimized experimentally. Cells are washed in PBS with culture medium to remove extracellular remaining dye. Cells are observed under microscope or used for confocal microscopy, FACS or spectrofluorimetry analysis. Zinc is the second most abundant transition metal in the body and it is essential as catalytic, structural and regulatory ion. Zinc ions are involved in homeostasis, immune responses, oxidative stress, apoptosis and aging. Zinc has been proposed to function as a conventional neurotransmitter for the presynaptic neuron and as a transmembrane signal to traverse the postsynaptic neuron. Aberrant zinc metabolism is associated with many neurological diseases including Alzheimer's disease, Parkinson's disease and epilepsy. The most suitable technique for in vivo monitoring of zinc has been proven to be fluorescence imaging.
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Common stock solution preparation
Table 1. Volume of DMSO needed to reconstitute specific mass of Zinquin AM *UltraPure grade* to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.
| 0.1 mg | 0.5 mg | 1 mg | 5 mg | 10 mg | |
| 1 mM | 218.112 µL | 1.091 mL | 2.181 mL | 10.906 mL | 21.811 mL |
| 5 mM | 43.622 µL | 218.112 µL | 436.224 µL | 2.181 mL | 4.362 mL |
| 10 mM | 21.811 µL | 109.056 µL | 218.112 µL | 1.091 mL | 2.181 mL |
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References
View all 8 references: Citation Explorer
Zinquin identifies subcellular compartmentalization of zinc in cortical neurons. Relation to the trafficking of zinc and the mitochondrial compartment
Authors: Colvin RA, Laskowski M, Fontaine CP.
Journal: Brain Res (2006): 1
Authors: Colvin RA, Laskowski M, Fontaine CP.
Journal: Brain Res (2006): 1
S-Nitroso compounds interfere with zinc probing by Zinquin
Authors: Jansen S, Arning J, Dulcks T, Beyersmann D.
Journal: Anal Biochem (2004): 145
Authors: Jansen S, Arning J, Dulcks T, Beyersmann D.
Journal: Anal Biochem (2004): 145
Coordination and fluorescence of the intracellular Zn2+ probe [2-methyl-8-(4-toluenesulfonamido)-6-quinolyloxy]acetic acid (Zinquin A) in ternary Zn2+ complexes
Authors: Hendrickson KM, Geue JP, Wyness O, Lincoln SF, Ward AD.
Journal: J Am Chem Soc (2003): 3889
Authors: Hendrickson KM, Geue JP, Wyness O, Lincoln SF, Ward AD.
Journal: J Am Chem Soc (2003): 3889
Fluorescent detection of Zn(2+)-rich vesicles with Zinquin: mechanism of action in lipid environments
Authors: Snitsarev V, Budde T, Stricker TP, Cox JM, Krupa DJ, Geng L, Kay AR.
Journal: Biophys J (2001): 1538
Authors: Snitsarev V, Budde T, Stricker TP, Cox JM, Krupa DJ, Geng L, Kay AR.
Journal: Biophys J (2001): 1538
The synthesis and fluorescent properties of analogues of the zinc(II) specific fluorophore zinquin ester
Authors: Kimber MC, Mahadevan IB, Lincoln SF, Ward AD, Tiekink ER.
Journal: J Org Chem (2000): 8204
Authors: Kimber MC, Mahadevan IB, Lincoln SF, Ward AD, Tiekink ER.
Journal: J Org Chem (2000): 8204
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