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Ulrike Pech, Natalia H. Revelo, Katharina J. Seitz, Silvio O. Rizzoli, and André Fiala (2014)

Optical Dissection of Experience-Dependent Pre- and Postsynaptic Plasticity in the Drosophila Brain

Cell Reports 10(12):2083-2095.  (export entry)


Drosophila represents a key model organism for dissecting neuronal circuits that underlie innate and adaptive behavior. However, this task is limited by a lack of tools to monitor physiological parameters of spatially distributed, central synapses in identified neurons. We generated transgenic fly strains that express functional fluorescent reporters targeted to either pre-or postsynaptic compartments. Presynaptic Ca2+ dynamics are monitored using synaptophysin-coupled GCaMP3, synaptic transmission is monitored using red fluorescent synaptophysinpHTomato, and postsynaptic Ca2+ dynamics are visualized usingGCaMP3fused with the postsynaptic matrix protein, dHomer. Using two-photon in vivo imaging of olfactory projection neurons, odor-evoked activity across populations of synapses is visualized in the antennal lobe and the mushroom body calyx. Prolonged odor exposure causes odor-specific and differential experience-dependent changes in preand postsynaptic activity at both levels of olfactory processing. The approach advances the physiological analysis of synaptic connections across defined groups of neurons in intact Drosophila.
DOI: 10.1016/j.celrep.2015.02.065 ISSN: 2211-1247