Universität zu Köln

Hancock, Clare E., Rostami, Vahid, Rachad, El Yazid, Deimel, Stephan H., Nawrot, Martin P. and Fiala, Andre (2022). Visualization of learning-induced synaptic plasticity in output neurons of the Drosophila mushroom body gamma-lobe. Sci Rep, 12 (1). BERLIN: NATURE PORTFOLIO. ISSN 2045-2322

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Abstract

By learning, through experience, which stimuli coincide with dangers, it is possible to predict outcomes and act pre-emptively to ensure survival. In insects, this process is localized to the mushroom body (MB), the circuitry of which facilitates the coincident detection of sensory stimuli and punishing or rewarding cues and, downstream, the execution of appropriate learned behaviors. Here, we focused our attention on the mushroom body output neurons (MBONs) of the gamma-lobes that act as downstream synaptic partners of the MB gamma-Kenyon cells (KCs) to ask how the output of the MB gamma-lobe is shaped by olfactory associative conditioning, distinguishing this from non-associative stimulus exposure effects, and without the influence of downstream modulation. This was achieved by employing a subcellularly localized calcium sensor to specifically monitor activity at MBON postsynaptic sites. Therein, we identified a robust associative modulation within only one MBON postsynaptic compartment (MBON-gamma 1pedc > alpha/beta), which displayed a suppressed postsynaptic response to an aversively paired odor. While this MBON did not undergo non-associative modulation, the reverse was true across the remainder of the gamma-lobe, where general odor-evoked adaptation was observed, but no conditioned odor-specific modulation. In conclusion, associative synaptic plasticity underlying aversive olfactory learning is localized to one distinct synaptic gamma KC-to-gamma MBON connection.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hancock, Clare E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rostami, Vahid UNSPECIFIED UNSPECIFIED UNSPECIFIED Rachad, El Yazid UNSPECIFIED UNSPECIFIED UNSPECIFIED Deimel, Stephan H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nawrot, Martin P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fiala, Andre UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-665926
DOI:	10.1038/s41598-022-14413-5
Journal or Publication Title:	Sci Rep
Volume:	12
Number:	1
Date:	2022
Publisher:	NATURE PORTFOLIO
Place of Publication:	BERLIN
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MEMORY; INHIBITION; MODULATION; MUTANTS Multiple languages Multidisciplinary Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66592