@article{LyutovaSelchoPfeufferetal.2019, author = {Lyutova, Radostina and Selcho, Mareike and Pfeuffer, Maximilian and Segebarth, Dennis and Habenstein, Jens and Rohwedder, Astrid and Frantzmann, Felix and Wegener, Christian and Thum, Andreas S. and Pauls, Dennis}, title = {Reward signaling in a recurrent circuit of dopaminergic neurons and peptidergic Kenyon cells}, series = {Nature Communications}, volume = {10}, journal = {Nature Communications}, doi = {10.1038/s41467-019-11092-1}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-202161}, pages = {3097}, year = {2019}, abstract = {Dopaminergic neurons in the brain of the Drosophila larva play a key role in mediating reward information to the mushroom bodies during appetitive olfactory learning and memory. Using optogenetic activation of Kenyon cells we provide evidence that recurrent signaling exists between Kenyon cells and dopaminergic neurons of the primary protocerebral anterior (pPAM) cluster. Optogenetic activation of Kenyon cells paired with odor stimulation is sufficient to induce appetitive memory. Simultaneous impairment of the dopaminergic pPAM neurons abolishes appetitive memory expression. Thus, we argue that dopaminergic pPAM neurons mediate reward information to the Kenyon cells, and in turn receive feedback from Kenyon cells. We further show that this feedback signaling is dependent on short neuropeptide F, but not on acetylcholine known to be important for odor-shock memories in adult flies. Our data suggest that recurrent signaling routes within the larval mushroom body circuitry may represent a mechanism subserving memory stabilization.}, language = {en} } @article{PaulsBlechschmidtFrantzmannetal.2018, author = {Pauls, Dennis and Blechschmidt, Christine and Frantzmann, Felix and el Jundi, Basil and Selcho, Mareike}, title = {A comprehensive anatomical map of the peripheral octopaminergic/tyraminergic system of Drosophila melanogaster}, series = {Scientific Reports}, volume = {8}, journal = {Scientific Reports}, number = {15314}, doi = {10.1038/s41598-018-33686-3}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-177412}, year = {2018}, abstract = {The modulation of an animal's behavior through external sensory stimuli, previous experience and its internal state is crucial to survive in a constantly changing environment. In most insects, octopamine (OA) and its precursor tyramine (TA) modulate a variety of physiological processes and behaviors by shifting the organism from a relaxed or dormant condition to a responsive, excited and alerted state. Even though OA/TA neurons of the central brain are described on single cell level in Drosophila melanogaster, the periphery was largely omitted from anatomical studies. Given that OA/TA is involved in behaviors like feeding, flying and locomotion, which highly depend on a variety of peripheral organs, it is necessary to study the peripheral connections of these neurons to get a complete picture of the OA/TA circuitry. We here describe the anatomy of this aminergic system in relation to peripheral tissues of the entire fly. OA/TA neurons arborize onto skeletal muscles all over the body and innervate reproductive organs, the heart, the corpora allata, and sensory organs in the antennae, legs, wings and halteres underlining their relevance in modulating complex behaviors.}, language = {en} }