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Home > KonScience > KNS023 special – How neural networks process sensory data (Giovanni Galizia)

Podcast:

KonScience

Episode:

KNS023 special – How neural networks process sensory data (Giovanni Galizia)

Category:

Science & Medicine

Duration:

00:53:42

Publish Date:

2014-06-25 10:25:36

Description:

Dies flattrn

Experimental recording of a seminar lecture by Prof. C. Giovanni Galizia (Biology Department, Uni Konstanz) about neurobiology of fruit flies and honey bees with regards to odor sensing. We recommend you download the presentation slides and follow them while listening.

Creative Commons Attribution 3.0 Germany

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Sendungsnotizen

Biology department Uni Konstanz
Prof. Giovanni Galizia (Zoology & Neurobiology)

Sensory transduction: fruit fly

Honey bee & fruit fly as model organisms
Antennal lobe: 1st stop in insect brain for sensory input
Mushroom body & protocerebrum: further processing, learning & memory
olfaction (olfactory) = (related to) sense of smell
G-proteins, their coupled receptors (GPCR) & the signal transduction coupled to those
several proteins called G_{o, i, alpha, etc.} = olfactory GPCRs
G-protein coupled signal transduction
Ligand-gated ion channel

Papers mentioned:

Sato K, Pellegrino M, Nakagawa T, Nakagawa T, Vosshall LB, et al. (2008) Insect olfactory receptors are heteromeric ligand-gated ion channels. Nature 452: 1002–1006
Smart R, Kiely A, Beale M, Vargas E, Carraher C, et al. (2008) Drosophila odorant receptors are novel seven transmembrane domain proteins that can signal independently of heterotrimeric G proteins. Insect Biochemistry and Molecular Biology 38: 770–780
Yao CA, Carlson JR (2010) Role of G-Proteins in Odor-Sensing and CO₂-Sensing Neurons in Drosophila. J Neurosci 30: 4562–4572
Deng Y, Zhang W, Farhat K, Oberland S, Gisselmann G, et al. (2011) The Stimulatory G_αs Protein Is Involved in Olfactory Signal Transduction in Drosophila. PLoS ONE 6: e18605
Chatterjee A, Roman G, Hardin PE (2009) G_O contributes to olfactory reception in Drosophila melanogaster. BMC Physiology 9: 22
Kain P, Chakraborty TS, Sundaram S, Siddiqi O, Rodrigues V, et al. (2008) Reduced Odor Responses from Antennal Neurons of G_qα, Phospholipase Cβ, and rdgA Mutants in Drosophila Support a Role for a Phospholipid Intermediate in Insect Olfactory Transduction. J Neurosci 28: 4745–4755
Wicher D, Schäfer R, Bauernfeind R, Stensmyr MC, Heller R, et al. (2008) Drosophila odorant receptors are both ligand-gated and cyclic-nucleotide-activated cation channels. Nature 452: 1007–1011

1. Behavior

GABA_BR = GABA-receptor B; coupled to a K⁺ ion channel via G-proteins
GABA = γ-Aminobutyric acid (neurotransmitter)

2. In vitro experiments

3. In vivo experiments

peptide networks: honey bee

Interneuron
Tachykinin & Allatostatin: neuropeptides; not recycled like neurotransmitters
Kreissl S, Strasser C, Galizia CG (2010) Allatostatin immunoreactivity in the honeybee brain. J Comp Neurol 518: 1391–1417

olfactory processing: a model

Andere relevante Episoden / Related episodes

KNS024 - Wie kam das bloß durch die Ethikkommission?

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