期刊
FRONTIERS IN NEURAL CIRCUITS
卷 2, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/neuro.04.002.2008
关键词
uncaging; inhibition; ruthenium; GABA; photorelease
资金
- Kavli Institute for Brain Science
- National Eye Institute
- Fulbright Commission
- CONICET
- ANPCyT
- Office of Technology Ventures from Columbia University
We describe the selective photorelease of gamma-amino butyric acid (GABA) with a novel caged-GABA compound that uses a ruthenium complex as photosensor. This compound (RuBi-GABA) can be excited with visible wavelengths, providing greater tissue penetration, less photo-toxicity, and faster photorelease kinetics than currently used UV light-sensitive caged compounds. Using pyramidal neurons from neocortical brain slices, we show that RuBi-GABA uncaging induces GABA-A receptor-mediated responses, has no detectable side effects on endogenous GABAergic and glutamatergic receptors and generates responses with kinetics and spatial resolution comparable to the best caged GABA compounds presently available. Finally, we illustrate two potential applications of RuBi-GABA uncaging: GABA receptor mapping, and optical silencing of neuronal firing.
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