Imaging synaptic zinc: promises and perils.

Abstract:

:It is well established that some excitatory nerve terminals have high concentrations of Zn(2+) in their synaptic vesicles. For some time, it has been believed that synaptic Zn(2+) is released during neurotransmission and acts as a neuromodulator. Fluorescent Zn(2+) indicators that do not penetrate membranes offer the prospect of rendering the release of Zn(2+) visible. Here, I take a critical look at fluorimetric imaging experiments devised to determine whether Zn(2+) is released and show that they are particularly susceptible to artifacts. Moreover, I will argue that recent experiments suggest that, rather than being released, Zn(2+) is presented to the extracellular space firmly coordinated to presynaptic macromolecules.

journal_name

Trends Neurosci

journal_title

Trends in neurosciences

authors

Kay AR

doi

10.1016/j.tins.2006.02.004

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

200-6

issue

4

eissn

0166-2236

issn

1878-108X

pii

S0166-2236(06)00045-2

journal_volume

29

pub_type

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