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© MPI f. Dynamik und Selbstorganisation
Publication : Nature methods

Holographic photolysis of caged neurotransmitters

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature methods - 01 Sep 2008

Lutz C, Otis TS, DeSars V, Charpak S, DiGregorio DA, Emiliani V

Link to Pubmed [PMID] – 19160517

Nat. Methods 2008 Sep;5(9):821-7

Stimulation of light-sensitive chemical probes has become a powerful tool for the study of dynamic signaLing processes in living tissue. Classically, this approach has been constrained by limitations of lens-based and point-scanning illumination systems. Here we describe a microscope configuration that incorporates a nematic liquid-crystal spatial light modulator to generate holographic patterns of illumination. This microscope can produce illumination spots of variable size and number, and in patterns shaped to precisely match user-defined elements in a specimen. Using holographic illumination to photolyze caged glutamate in brain slices, we show that shaped excitation on segments of neuronal dendrites and simultaneous, multispot excitation of different dendrites enables precise spatial and rapid temporal control of glutamate receptor activation. By allowing the excitation volume shape to be tailored precisely, the holographic microscope provides an extremely flexible method for activation of various photosensitive proteins and small molecules.

http://www.ncbi.nlm.nih.gov/pubmed/19160517