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Huang Y, Li N, Yang C, Lin Y, Wen Y, Zheng L, Zhao C. Honeybee as a food nutrition analysis model of neural development and gut microbiota. Neurosci Biobehav Rev 2023; 153:105372. [PMID: 37652394 DOI: 10.1016/j.neubiorev.2023.105372] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/13/2023] [Accepted: 08/23/2023] [Indexed: 09/02/2023]
Abstract
Research on the relationships between the gut microbiota and the neurophysiology and behavior of animals has grown exponentially in just a few years. Insect behavior may be controlled by molecular mechanisms that are partially homologous to those in mammals, and swarming insects may be suitable as experiment models in these types of investigations. All core gut bacteria in honeybees can be cultivated in vitro. Certain gut microflora of bees can be genetically engineered or sterilized and colonized. The bee gut bacteria model is established more rapidly and has a higher flux than other sterile animal models. It may help elucidate the pathogenesis of intestinal diseases and identify effective molecular therapeutic targets against them. In the present review, we focused on the contributions of the honeybee model in learning cognition and microbiome research. We explored the relationship between honeybee behavior and neurodevelopment and the factors determining the mechanisms by which the gut microbiota affects the host. In particular, we concentrated on the correlation between gut microbiota and brain development. Finally, we examined strategies for the effective use of simple animal models in animal cognition and microbiome research.
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Affiliation(s)
- Yajun Huang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Na Li
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Chengfeng Yang
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Yan Lin
- College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Yuxi Wen
- College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Department of Analytical and Food Chemistry, Faculty of Sciences, Universidade de Vigo, 32004 Ourense, Spain
| | - Lingjun Zheng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Chao Zhao
- College of Marine Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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2
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Kobayashi N, Hasegawa Y, Okada R, Sakura M. Visual learning in tethered bees modifies flight orientation and is impaired by epinastine. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2023:10.1007/s00359-023-01623-z. [PMID: 36930349 DOI: 10.1007/s00359-023-01623-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 02/09/2023] [Accepted: 03/01/2023] [Indexed: 03/18/2023]
Abstract
Visual-orientation learning of a tethered flying bee was investigated using a flight simulator and a novel protocol in which orientation preference toward trained visual targets was assessed in tests performed before and after appetitive conditioning. Either a blue or a green rectangle (conditioned stimulus, CS) was associated with 30% sucrose solution (unconditioned stimulus, US), whereas the other rectangle was not paired with US. Bees were tested in a closed-looped flight simulator 5 min after ten pairings of the US and CS. Conditioned bees were preferentially oriented to the CS after such training. This increase in preference for CS was maintained for 24 h, indicating the presence of long-term memory. Because the total orienting time was not altered by conditioning, conditioning did not enhance orientation activity itself but increased the relative time for orientation to CS. When 0.4 or 4 mM epinastine (an antagonist of octopamine receptors) was injected into the bee's head 30 min prior to the experiment, both short- and long-term memory formation were significantly impaired, suggesting that octopamine, which is crucial for appetitive olfactory learning in insects, is also involved in visual orientation learning.
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Affiliation(s)
- Norihiro Kobayashi
- Department of Biology, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan
| | | | - Ryuichi Okada
- Department of Biology, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan.
| | - Midori Sakura
- Department of Biology, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo, 657-8501, Japan.
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3
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Finke V, Scheiner R, Giurfa M, Avarguès-Weber A. Individual consistency in the learning abilities of honey bees: cognitive specialization within sensory and reinforcement modalities. Anim Cogn 2023; 26:909-928. [PMID: 36609813 PMCID: PMC10066154 DOI: 10.1007/s10071-022-01741-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 12/19/2022] [Accepted: 12/30/2022] [Indexed: 01/09/2023]
Abstract
The question of whether individuals perform consistently across a variety of cognitive tasks is relevant for studies of comparative cognition. The honey bee (Apis mellifera) is an appropriate model to study cognitive consistency as its learning can be studied in multiple elemental and non-elemental learning tasks. We took advantage of this possibility and studied if the ability of honey bees to learn a simple discrimination correlates with their ability to solve two tasks of higher complexity, reversal learning and negative patterning. We performed four experiments in which we varied the sensory modality of the stimuli (visual or olfactory) and the type (Pavlovian or operant) and complexity (elemental or non-elemental) of conditioning to examine if stable correlated performances could be observed across experiments. Across all experiments, an individual's proficiency to learn the simple discrimination task was positively and significantly correlated with performance in both reversal learning and negative patterning, while the performances in reversal learning and negative patterning were positively, yet not significantly correlated. These results suggest that correlated performances across learning paradigms represent a distinct cognitive characteristic of bees. Further research is necessary to examine if individual cognitive consistency can be found in other insect species as a common characteristic of insect brains.
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Affiliation(s)
- Valerie Finke
- Zoologie II, Biozentrum, University of Würzburg, Am Hubland, 97074, Würzburg, Germany. .,Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, 118 Route de Narbonne, 31062, Toulouse, France.
| | - Ricarda Scheiner
- Zoologie II, Biozentrum, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Martin Giurfa
- Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, 118 Route de Narbonne, 31062, Toulouse, France.,Institut Universitaire de France, Paris, France
| | - Aurore Avarguès-Weber
- Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, 118 Route de Narbonne, 31062, Toulouse, France
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4
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Abstract
Insects are traditionally thought to respond to noxious stimuli in an inflexible manner, without the ability to modulate their behavior according to context. We investigated whether bumblebees’ attraction to high sucrose solution concentrations reduces their avoidance of noxious heat. Bees were given the choice between either unheated or noxiously heated (55 °C) feeders with different sucrose concentrations and marked by different colors. Bees avoided noxious feeders when the unheated feeders contained high sucrose concentrations, but progressively increased feeding from noxious feeders when the sucrose concentration at unheated feeders decreased. This shows a motivational trade-off of nociceptive responses. Bees used learned color cues for their decisions, and thus the trade-off was based on processing in the brain, rather than just peripheral processing. Therefore, bees can use contextual information to modulate nociceptive behavior. This ability is consistent with a capacity for pain experiences in insects.
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5
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Wissink M, Nehring V. Appetitive olfactory learning suffers in ants when octopamine or dopamine receptors are blocked. J Exp Biol 2021; 224:271209. [PMID: 34357377 DOI: 10.1242/jeb.242732] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/14/2021] [Indexed: 01/24/2023]
Abstract
Associative learning relies on the detection of coincidence between a stimulus and a reward or punishment. In the insect brain, this process is carried out in the mushroom bodies under the control of octopaminergic and dopaminergic neurons. It was assumed that appetitive learning is governed by octopaminergic neurons, while dopamine is required for aversive learning. This view has recently been challenged: both neurotransmitters are involved in both types of learning in bees and flies. Here, we tested which neurotransmitters are required for appetitive learning in ants. We trained Lasius niger workers to discriminate two mixtures of linear hydrocarbons and to associate one of them with a sucrose reward. We analysed the walking paths of the ants using machine learning and found that the ants spent more time near the rewarded odour than near the other, a preference that was stable for at least 24 h. We then treated the ants before learning with either epinastine, an octopamine receptor blocker, or flupentixol, a dopamine receptor blocker. Ants with blocked octopamine receptors did not prefer the rewarded odour. Octopamine signalling is thus necessary for appetitive learning of olfactory cues, probably because it signals information about odours or reward to the mushroom body. In contrast, ants with blocked dopamine receptors initially learned the rewarded odour but failed to retrieve this memory 24 h later. Dopamine is thus probably required for long-term memory consolidation, independent of short-term memory formation. Our results show that appetitive olfactory learning depends on both octopamine and dopamine signalling in ants.
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Affiliation(s)
- Maarten Wissink
- Evolutionary Biology & Ecology, Institute for Biology I (Zoology), University of Freiburg, D-79104 Freiburg, Germany
| | - Volker Nehring
- Evolutionary Biology & Ecology, Institute for Biology I (Zoology), University of Freiburg, D-79104 Freiburg, Germany
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Blenau W, Wilms JA, Balfanz S, Baumann A. AmOctα2R: Functional Characterization of a Honeybee Octopamine Receptor Inhibiting Adenylyl Cyclase Activity. Int J Mol Sci 2020; 21:E9334. [PMID: 33302363 PMCID: PMC7762591 DOI: 10.3390/ijms21249334] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/04/2020] [Accepted: 12/06/2020] [Indexed: 11/17/2022] Open
Abstract
The catecholamines norepinephrine and epinephrine are important regulators of vertebrate physiology. Insects such as honeybees do not synthesize these neuroactive substances. Instead, they use the phenolamines tyramine and octopamine for similar physiological functions. These biogenic amines activate specific members of the large protein family of G protein-coupled receptors (GPCRs). Based on molecular and pharmacological data, insect octopamine receptors were classified as either α- or β-adrenergic-like octopamine receptors. Currently, one α- and four β-receptors have been molecularly and pharmacologically characterized in the honeybee. Recently, an α2-adrenergic-like octopamine receptor was identified in Drosophila melanogaster (DmOctα2R). This receptor is activated by octopamine and other biogenic amines and causes a decrease in intracellular cAMP ([cAMP]i). Here, we show that the orthologous receptor of the honeybee (AmOctα2R), phylogenetically groups in a clade closely related to human α2-adrenergic receptors. When heterologously expressed in an eukaryotic cell line, AmOctα2R causes a decrease in [cAMP]i. The receptor displays a pronounced preference for octopamine over tyramine. In contrast to DmOctα2R, the honeybee receptor is not activated by serotonin. Its activity can be blocked efficiently by 5-carboxamidotryptamine and phentolamine. The functional characterization of AmOctα2R now adds a sixth member to this subfamily of monoaminergic receptors in the honeybee and is an important step towards understanding the actions of octopamine in honeybee behavior and physiology.
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Affiliation(s)
- Wolfgang Blenau
- Institute of Biochemistry, Leipzig University, 04103 Leipzig, Germany;
| | - Joana Alessandra Wilms
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (J.A.W.); (S.B.)
| | - Sabine Balfanz
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (J.A.W.); (S.B.)
| | - Arnd Baumann
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (J.A.W.); (S.B.)
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Baracchi D, Cabirol A, Devaud JM, Haase A, d'Ettorre P, Giurfa M. Pheromone components affect motivation and induce persistent modulation of associative learning and memory in honey bees. Commun Biol 2020; 3:447. [PMID: 32807870 PMCID: PMC7431541 DOI: 10.1038/s42003-020-01183-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/30/2020] [Indexed: 01/11/2023] Open
Abstract
Since their discovery in insects, pheromones are considered as ubiquitous and stereotyped chemical messengers acting in intraspecific animal communication. Here we studied the effect of pheromones in a different context as we investigated their capacity to induce persistent modulations of associative learning and memory. We used honey bees, Apis mellifera, and combined olfactory conditioning and pheromone preexposure with disruption of neural activity and two-photon imaging of olfactory brain circuits, to characterize the effect of pheromones on olfactory learning and memory. Geraniol, an attractive pheromone component, and 2-heptanone, an aversive pheromone, improved and impaired, respectively, olfactory learning and memory via a durable modulation of appetitive motivation, which left odor processing unaffected. Consistently, interfering with aminergic circuits mediating appetitive motivation rescued or diminished the cognitive effects induced by pheromone components. We thus show that these chemical messengers act as important modulators of motivational processes and influence thereby animal cognition.
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Affiliation(s)
- David Baracchi
- Research Centre on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, 118 route de Narbonne, F-31062, Toulouse, Cedex 09, France.
- Department of Biology, University of Florence, Via Madonna del Piano, 6, 50019, Sesto Fiorentino, Italy.
| | - Amélie Cabirol
- Center for Mind/Brain Sciences (CIMeC), University of Trento, Piazza Manifattura 1, I-38068, Rovereto, Italy
| | - Jean-Marc Devaud
- Research Centre on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, 118 route de Narbonne, F-31062, Toulouse, Cedex 09, France
| | - Albrecht Haase
- Center for Mind/Brain Sciences (CIMeC), University of Trento, Piazza Manifattura 1, I-38068, Rovereto, Italy
- Department of Physics, University of Trento, Via Sommarive 14, I-38123, Povo, Italy
| | - Patrizia d'Ettorre
- Research Centre on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, 118 route de Narbonne, F-31062, Toulouse, Cedex 09, France
- Laboratory of Experimental and Comparative Ethology, University of Paris 13, F-93430, Sorbonne Paris Cité, France
- Institut Universitaire de France (IUF), Paris, France
| | - Martin Giurfa
- Research Centre on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, 118 route de Narbonne, F-31062, Toulouse, Cedex 09, France.
- Institut Universitaire de France (IUF), Toulouse, France.
- College of Animal Science (College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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8
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Sheehan MJ, Goldberg J. Animal Behavior: Socially Distanced Wasps Learn About Rivals. Curr Biol 2020; 30:R878-R880. [DOI: 10.1016/j.cub.2020.05.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Junca P, Garnery L, Sandoz JC. Genotypic trade-off between appetitive and aversive capacities in honeybees. Sci Rep 2019; 9:10313. [PMID: 31311964 PMCID: PMC6635639 DOI: 10.1038/s41598-019-46482-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 06/20/2019] [Indexed: 11/23/2022] Open
Abstract
Honey bees can learn both appetitive and aversive associations, using two olfactory conditioning protocols. Appetitive conditioning of the proboscis extension response (PER) involves associating an odor, the conditioned stimulus (CS) with a sucrose solution, the unconditioned stimulus (US). Conversely, aversive conditioning of the sting extension response (SER) involves associating the odor CS with an electric or thermal shock US. Here, we investigated the relationship between bees’ appetitive and aversive learning capacities at the individual level and the influence of bees’ genotype. As learning performance was shown to depend on an individuals’ sensitivity to the US, we systematically measured four different traits in each individual bee: sensitivity to sucrose, PER learning performance with a sucrose US, sensitivity to temperature, SER learning with a temperature US. First, we confirmed for both conditioning types that learning performance correlates with US responsiveness. Second, we found a trade-off between appetitive and aversive learning performances: bees that were better appetitive learners (and had a lower sucrose US threshold) learned less efficiently in the aversive conditioning (and had a higher temperature US threshold). Because the honey bee queen typically mates with 15–20 males, the workers from a honey bee hive belong to as many different patrilines, allowing for the search of the genetic determinism of cognitive abilities. Using microsatellite analysis, we show that a genetic determinism underlies the trade-off between appetitive and aversive capacities, with appetitively vs aversively biased patrilines. The honey bee hive thus appears as a genetically structured cognitive community.
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Affiliation(s)
- Pierre Junca
- Evolution, Genomes, Behavior and Ecology, CNRS, Univ Paris-Sud, IRD (UMR 9191), 1 avenue de la Terrasse, Gif-sur-Yvette, 91198, France
| | - Lionel Garnery
- Evolution, Genomes, Behavior and Ecology, CNRS, Univ Paris-Sud, IRD (UMR 9191), 1 avenue de la Terrasse, Gif-sur-Yvette, 91198, France
| | - Jean-Christophe Sandoz
- Evolution, Genomes, Behavior and Ecology, CNRS, Univ Paris-Sud, IRD (UMR 9191), 1 avenue de la Terrasse, Gif-sur-Yvette, 91198, France.
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Cholé H, Carcaud J, Mazeau H, Famié S, Arnold G, Sandoz JC. Social Contact Acts as Appetitive Reinforcement and Supports Associative Learning in Honeybees. Curr Biol 2019; 29:1407-1413.e3. [DOI: 10.1016/j.cub.2019.03.025] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 02/07/2019] [Accepted: 03/13/2019] [Indexed: 11/16/2022]
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11
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Finkelstein AB, Brent CS, Giurfa M, Amdam GV. Foraging Experiences Durably Modulate Honey Bees' Sucrose Responsiveness and Antennal Lobe Biogenic Amine Levels. Sci Rep 2019; 9:5393. [PMID: 30931967 PMCID: PMC6443788 DOI: 10.1038/s41598-019-41624-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 03/13/2019] [Indexed: 11/10/2022] Open
Abstract
Foraging exposes organisms to rewarding and aversive events, providing a selective advantage for maximizing the former while minimizing the latter. Honey bees (Apis mellifera) associate environmental stimuli with appetitive or aversive experiences, forming preferences for scents, locations, and visual cues. Preference formation is influenced by inter-individual variation in sensitivity to rewarding and aversive stimuli, which can be modulated by pharmacological manipulation of biogenic amines. We propose that foraging experiences act on biogenic amine pathways to induce enduring changes to stimulus responsiveness. To simulate varied foraging conditions, freely-moving bees were housed in cages where feeders offered combinations of sucrose solution, floral scents, and aversive electric shock. Transient effects were excluded by providing bees with neutral conditions for three days prior to all subsequent assays. Sucrose responsiveness was reduced in bees that had foraged for scented rather than unscented sucrose under benign conditions. This was not the case under aversive foraging conditions, suggesting an adaptive tuning process which maximizes preference for high quality, non-aversive floral sites. Foraging conditions also influenced antennal lobe octopamine and serotonin, neuromodulators involved in stimulus responsiveness and foraging site evaluation. Our results suggest that individuals’ foraging experiences durably modify neurochemistry and shape future foraging behaviour.
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Affiliation(s)
| | - Colin S Brent
- United States Department of Agriculture, Arid Land Agricultural Research Center, Maricopa, USA
| | - Martin Giurfa
- Research Centre on Animal Cognition, Center for Integrative Biology, CNRS, University of Toulouse, 118 route de Narbonne, F-31062, Toulouse, Cedex 09, France
| | - Gro V Amdam
- School of Life Sciences, Arizona State University, Tempe, USA.,Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Aas, Norway
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Pauls D, Blechschmidt C, Frantzmann F, El Jundi B, Selcho M. A comprehensive anatomical map of the peripheral octopaminergic/tyraminergic system of Drosophila melanogaster. Sci Rep 2018; 8:15314. [PMID: 30333565 PMCID: PMC6192984 DOI: 10.1038/s41598-018-33686-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/02/2018] [Indexed: 01/09/2023] Open
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.
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Affiliation(s)
- Dennis Pauls
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, D-97074, Würzburg, Germany
| | - Christine Blechschmidt
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, D-97074, Würzburg, Germany
| | - Felix Frantzmann
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, D-97074, Würzburg, Germany
| | - Basil El Jundi
- Zoology II, Theodor-Boveri Institute, Biocenter, University of Würzburg, D-97074, Würzburg, Germany
| | - Mareike Selcho
- Neurobiology and Genetics, Theodor-Boveri Institute, Biocenter, University of Würzburg, D-97074, Würzburg, Germany.
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