keyword
MENU ▼
Read by QxMD icon Read
search

octopamine

keyword
https://www.readbyqxmd.com/read/27846261/neuromodulation-of-nestmate-recognition-decisions-by-pavement-ants
#1
Andrew N Bubak, Jazmine D W Yaeger, Kenneth J Renner, John G Swallow, Michael J Greene
Ant colonies are distributed systems that are regulated in a non-hierarchical manner. Without a central authority, individuals inform their decisions by comparing information in local cues to a set of inherent behavioral rules. Individual behavioral decisions collectively change colony behavior and lead to self-organization capable of solving complex problems such as the decision to engage in aggressive societal conflicts with neighbors. Despite the relevance to colony fitness, the mechanisms that drive individual decisions leading to cooperative behavior are not well understood...
2016: PloS One
https://www.readbyqxmd.com/read/27828941/neuromodulators-signal-through-astrocytes-to-alter-neural-circuit-activity-and-behaviour
#2
Zhiguo Ma, Tobias Stork, Dwight E Bergles, Marc R Freeman
Astrocytes associate with synapses throughout the brain and express receptors for neurotransmitters that can increase intracellular calcium (Ca(2+)). Astrocytic Ca(2+) signalling has been proposed to modulate neural circuit activity, but the pathways that regulate these events are poorly defined and in vivo evidence linking changes in astrocyte Ca(2+) levels to alterations in neurotransmission or behaviour is limited. Here we show that Drosophila astrocytes exhibit activity-regulated Ca(2+) signalling in vivo...
November 9, 2016: Nature
https://www.readbyqxmd.com/read/27816487/arylalkylamine-n-acetyltransferase-1-gene-tcaanat1-is-required-for-cuticle-morphology-and-pigmentation-of-the-adult-red-flour-beetle-tribolium-castaneum
#3
Mi Young Noh, Bonwoo Koo, Karl J Kramer, Subbaratnam Muthukrishnan, Yasuyuki Arakane
In the insect cuticle tanning pathway (sclerotization and pigmentation), the enzyme arylalkylamine N-acetyltransferase (AANAT) catalyzes the acetylation of dopamine to form N-acetyldopamine (NADA), which is one of the major precursors for quinone-mediated tanning. In this study we characterized and investigated the function of TcAANAT1 in cuticle pigmentation of the red flour beetle, Tribolium castaneum. We isolated a full length TcAANAT1 cDNA that encodes a protein of 256 amino acid residues with a predicted GCN5-related acetyltransferase domain containing an acetyl-CoA binding motif...
November 2, 2016: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27783939/camp-signals-in-drosophila-motor-neurons-are-confined-to-single-synaptic-boutons
#4
Isabella Maiellaro, Martin J Lohse, Robert J Kittel, Davide Calebiro
The second messenger cyclic AMP (cAMP) plays an important role in synaptic plasticity. Although there is evidence for local control of synaptic transmission and plasticity, it is less clear whether a similar spatial confinement of cAMP signaling exists. Here, we suggest a possible biophysical basis for the site-specific regulation of synaptic plasticity by cAMP, a highly diffusible small molecule that transforms the physiology of synapses in a local and specific manner. By exploiting the octopaminergic system of Drosophila, which mediates structural synaptic plasticity via a cAMP-dependent pathway, we demonstrate the existence of local cAMP signaling compartments of micrometer dimensions within single motor neurons...
October 25, 2016: Cell Reports
https://www.readbyqxmd.com/read/27770569/internal-states-drive-nutrient-homeostasis-by-modulating-exploration-exploitation-trade-off
#5
Verónica María Corrales-Carvajal, Aldo A Faisal, Carlos Ribeiro
Internal states can profoundly alter the behavior of animals. A quantitative understanding of the behavioral changes upon metabolic challenges is key to a mechanistic dissection of how animals maintain nutritional homeostasis. We used an automated video tracking setup to characterize how amino acid and reproductive states interact to shape exploitation and exploration decisions taken by adult Drosophila melanogaster. We find that these two states have specific effects on the decisions to stop at and leave proteinaceous food patches...
October 22, 2016: ELife
https://www.readbyqxmd.com/read/27759117/octopamine-controls-starvation-resistance-life-span-and-metabolic-traits-in-drosophila
#6
Yong Li, Julia Hoffmann, Yang Li, Flora Stephano, Iris Bruchhaus, Christine Fink, Thomas Roeder
The monoamines octopamine (OA) and tyramine (TA) modulate numerous behaviours and physiological processes in invertebrates. Nevertheless, it is not clear whether these invertebrate counterparts of norepinephrine are important regulators of metabolic and life history traits. We show that flies (Drosophila melanogaster) lacking OA are more resistant to starvation, while their overall life span is substantially reduced compared with control flies. In addition, these animals have increased body fat deposits, reduced physical activity and a reduced metabolic resting rate...
October 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27754851/the-impact-of-foxo-on-dopamine-and-octopamine-metabolism-in-drosophila-under-normal-and-heat-stress-conditions
#7
Nataly E Gruntenko, Natalya V Adonyeva, Elena V Burdina, Evgenia K Karpova, Olga V Andreenkova, Daniil V Gladkikh, Yury Y Ilinsky, Inga Yu Rauschenbach
The forkhead boxO transcription factor (FOXO) is a component of the insulin signalling pathway and plays a role in responding to adverse conditions, such as oxidative stress and starvation. In stressful conditions, FOXO moves from the cytosol to the nucleus where it activates gene expression programmes. Here, we show that FOXO in Drosophila melanogaster responds to heat stress as it does to other stressors. The catecholamine signalling pathway is another component of the stress response. In Drosophila, dopamine and octopamine levels rise steeply under heat, nutrition and mechanical stresses, which are followed by a decrease in the activity of synthesis enzymes...
November 15, 2016: Biology Open
https://www.readbyqxmd.com/read/27746212/the-stress-response-and-immune-system-share-borrow-and-reconfigure-their-physiological-network-elements-evidence-from-the-insects
#8
Shelley A Adamo
The classic biomedical view is that stress hormone effects on the immune system are largely pathological, especially if the stress is chronic. However, more recent interpretations have focused on the potential adaptive function of these effects. This paper examines stress response-immune system interactions from a physiological network perspective, using insects because of their simpler physiology. For example, stress hormones can reduce disease resistance, yet activating an immune response results in the release of stress hormones in both vertebrates and invertebrates...
October 13, 2016: Hormones and Behavior
https://www.readbyqxmd.com/read/27720624/starvation-induced-depotentiation-of-bitter-taste-in-drosophila
#9
Emily E LeDue, Kevin Mann, Ellen Koch, Bonnie Chu, Roslyn Dakin, Michael D Gordon
Nutrient deprivation can lead to dramatic changes in feeding behavior, including acceptance of foods that are normally rejected. In flies, this behavioral shift depends in part on reciprocal sensitization and desensitization of sweet and bitter taste, respectively. However, the mechanisms for bitter taste modulation remain unclear. Here, we identify a set of octopaminergic/tyraminergic neurons, named OA-VLs, that directly modulate bitter sensory neuron output in response to starvation. OA-VLs are in close proximity to bitter sensory neuron axon terminals and show reduced tonic firing following starvation...
October 1, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27717101/calmodulin-as-a-downstream-gene-of-octopamine-oar-%C3%AE-1-signalling-mediates-olfactory-attraction-in-gregarious-locusts
#10
L Xu, L Li, P Yang, Z Ma
The migratory locust (Locusta migratoria) shows aggregative traits in nymph marching bands and swarm formations through mutual olfactory attraction of conspecifics. However, olfactory preference in different nymph stages in gregarious locusts is not sufficiently explored. In this study, we found that the nymph olfactory preference for gregarious volatiles exhibited obvious variations at different developmental stages. The gregarious locusts show attractive response to conspecific volatiles from the third stadium...
October 7, 2016: Insect Molecular Biology
https://www.readbyqxmd.com/read/27669213/characterization-of-a-%C3%AE-adrenergic-like-octopamine-receptor-in-the-oriental-fruit-fly-bactrocera-dorsalis-hendel
#11
Hui-Min Li, Hong-Bo Jiang, Shun-Hua Gui, Xiao-Qiang Liu, Hong Liu, Xue-Ping Lu, Guy Smagghe, Jin-Jun Wang
The biogenic amine octopamine plays a critical role in the regulation of many physiological processes in insects. Octopamine transmits its action through a set of specific G-protein coupled receptors (GPCRs), namely octopamine receptors. Here, we report on a β-adrenergic-like octopamine receptor gene (BdOctβR1) from the oriental fruit fly, Bactrocera dorsalis (Hendel), a destructive agricultural pest that occurs in North America and the Asia-Pacific region. As indicated by RT-qPCR, BdOctβR1 was highly expressed in the central nervous system (CNS) and Malpighian tubules (MT) in the adult flies, suggesting it may undertake important roles in neural signaling in the CNS as well as physiological functions in the MT of this fly...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27640743/central-and-peripheral-neurotoxicity-induced-by-the-jack-bean-urease-jbu-in-nauphoeta-cinerea-cockroaches
#12
Thiago Carrazoni, Marines de Avila Heberle, Ana Paula Artusi Perin, Ana Paula Zanatta, Polyana Veloso Rodrigues, Fabiola Duarte Machado Dos Santos, Carlos Gabriel Moreira de Almeida, Ricardo Vaz Breda, Douglas Silva Dos Santos, Paulo Marcos Pinto, Jaderson Costa da Costa, Celia Regina Carlini, Cháriston André Dal Belo
BACKGROUND: Ureases of Canavalia ensiformis are natural insecticides with a still elusive entomotoxic mode of action. We have investigated the mechanisms involved in the neurotoxicity induced by Jack Bean Urease (JBU) in Nauphoeta cinerea (Olivier). METHODS: To carry out this study we have employed biochemical and neurophysiological analysis of different cockroach organ systems. RESULTS AND CONCLUSIONS: The injection of the insects with JBU (0...
August 10, 2016: Toxicology
https://www.readbyqxmd.com/read/27612383/regulation-of-starvation-induced-hyperactivity-by-insulin-and-glucagon-signaling-in-adult-drosophila
#13
Yue Yu, Rui Huang, Jie Ye, Vivian Zhang, Chao Wu, Guo Cheng, Junling Jia, Liming Wang
Starvation induces sustained increase in locomotion, which facilitates food localization and acquisition and hence composes an important aspect of food-seeking behavior. We investigated how nutritional states modulated starvation-induced hyperactivity in adult Drosophila. The receptor of the adipokinetic hormone (AKHR), the insect analog of glucagon, was required for starvation-induced hyperactivity. AKHR was expressed in a small group of octopaminergic neurons in the brain. Silencing AKHR(+) neurons and blocking octopamine signaling in these neurons eliminated starvation-induced hyperactivity, whereas activation of these neurons accelerated the onset of hyperactivity upon starvation...
September 9, 2016: ELife
https://www.readbyqxmd.com/read/27593450/octopamine-cyclic-release-and-its-modulation-of-visual-sensitivity-in-crayfish
#14
Leonardo Rodríguez-Sosa, Gabina Calderón-Rosete, Aída Ortega-Cambranis, Francisco F De-Miguel
The biogenic amine octopamine (OA) modulates invertebrate behavior by changing neuronal responses from sensory inputs to motor outputs. However, the OA modulation of visual sensitivity and its possible coupling to diurnal cycles remains unexplored. Here we studied the diurnal variations in the OA levels in the hemolymph of the crayfish Procambarus clarkii, its release from the structures in the eyestalk and its modulation of the retinal light sensitivity. The hemolymph concentration of OA and its amino acid precursor tyrosine was measured by high-resolution liquid chromatography; OA varied along the 24-hcycle...
September 1, 2016: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/27570248/triticum-monococcum-lines-with-distinct-metabolic-phenotypes-and-phloem-based-partial-resistance-to-the-bird-cherry-oat-aphid-rhopalosiphum-padi
#15
A F C Greenslade, J L Ward, J L Martin, D I Corol, S J Clark, L E Smart, G I Aradottir
Crop protection is an integral part of establishing food security, by protecting the yield potential of crops. Cereal aphids cause yield losses by direct damage and transmission of viruses. Some wild relatives of wheat show resistance to aphids but the mechanisms remain unresolved. In order to elucidate the location of the partial resistance to the bird cherry-oat aphid, Rhopalosiphum padi, in diploid wheat lines of Triticum monococcum, we conducted aphid performance studies using developmental bioassays and electrical penetration graphs, as well as metabolic profiling of partially resistant and susceptible lines...
May 2016: Annals of Applied Biology
https://www.readbyqxmd.com/read/27484910/identification-of-a-novel-%C3%AE-adrenergic-octopamine-receptor-like-gene-%C3%AE-aor-like-and-increased-atp-binding-cassette-b10-abcb10-expression-in-a-rhipicephalus-microplus-cell-line-derived-from-acaricide-resistant-ticks
#16
H H Caline Koh-Tan, Erin Strachan, Katherine Cooper, Lesley Bell-Sakyi, Nicholas N Jonsson
BACKGROUND: The cattle tick Rhipicephalus (Boophilus) microplus is an economically important parasite of livestock. Effective control of ticks using acaricides is threatened by the emergence of resistance to many existing compounds. Several continuous R. microplus cell lines have been established and provide an under-utilised resource for studies into acaricide targets and potential genetic mutations associated with resistance. As a first step to genetic studies using these resources, this study aimed to determine the presence or absence of two genes and their transcripts that have been linked with acaricide function in cattle ticks: β-adrenergic octopamine receptor (βAOR, associated with amitraz resistance) and ATP-binding cassette B10 (ABCB10, associated with macrocyclic lactone resistance) in six R...
2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27484898/amitraz-and-its-metabolite-differentially-activate-%C3%AE-and-%C3%AE-adrenergic-like-octopamine-receptors
#17
Tomo Kita, Takeshi Hayashi, Tomohiro Ohtani, Haruka Takao, Hiroshi Takasu, Genyan Liu, Hiroto Ohta, Fumiyo Ozoe, Yoshihisa Ozoe
BACKGROUND: Amitraz is a formamidine acaricide and insecticide used to control ticks, mites and fleas. N(2) -(2,4-Dimethylphenyl)-N(1) -methyformamidine (DPMF), a metabolite of amitraz, is thought to be an active agent that exerts acaricidal and insecticidal effects by acting as an agonist on octopamine receptors. The emergence of cattle ticks resistant to amitraz is a serious problem that requires urgent attention. The objective of this research was to determine which type of octopamine receptor is the primary target of amitraz and thereby understand the molecular mechanisms of action and resistance to amitraz...
August 3, 2016: Pest Management Science
https://www.readbyqxmd.com/read/27476597/auditory-efferent-system-modulates-mosquito-hearing
#18
Marta Andrés, Marvin Seifert, Christian Spalthoff, Ben Warren, Lukas Weiss, Diego Giraldo, Margret Winkler, Stephanie Pauls, Martin C Göpfert
The performance of vertebrate ears is controlled by auditory efferents that originate in the brain and innervate the ear, synapsing onto hair cell somata and auditory afferent fibers [1-3]. Efferent activity can provide protection from noise and facilitate the detection and discrimination of sound by modulating mechanical amplification by hair cells and transmitter release as well as auditory afferent action potential firing [1-3]. Insect auditory organs are thought to lack efferent control [4-7], but when we inspected mosquito ears, we obtained evidence for its existence...
August 8, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27424325/the-emerging-roles-of-human-trace-amines-and-human-trace-amine-associated-receptors-htaars-in-central-nervous-system
#19
Muhammad Zahid Khan, Waqas Nawaz
Human trace amines (TAs) are endogenous compounds, previously almost ignored in human pathology for many reasons (difficulty of their measurement in biological fluids, unknown receptors for elusive amines), are now considered to play a significant role in synaptic transmission within the central nervous system (CNS) acting as neuromodulators. The recent discovery of a novel family of G-protein-coupled receptors (GPCRs) that includes individual members that are highly specific for TAs indicates a potential role for TAs as vertebrate neurotransmitters or neuromodulators, although the majority of these GPCRs so far have not been demonstrated to be activated by TAs...
July 14, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27412401/roles-of-oa1-octopamine-receptor-and-dop1-dopamine-receptor-in-mediating-appetitive-and-aversive-reinforcement-revealed-by-rnai-studies
#20
Hiroko Awata, Ryo Wakuda, Yoshiyasu Ishimaru, Yuji Matsuoka, Kanta Terao, Satomi Katata, Yukihisa Matsumoto, Yoshitaka Hamanaka, Sumihare Noji, Taro Mito, Makoto Mizunami
Revealing reinforcing mechanisms in associative learning is important for elucidation of brain mechanisms of behavior. In mammals, dopamine neurons are thought to mediate both appetitive and aversive reinforcement signals. Studies using transgenic fruit-flies suggested that dopamine neurons mediate both appetitive and aversive reinforcements, through the Dop1 dopamine receptor, but our studies using octopamine and dopamine receptor antagonists and using Dop1 knockout crickets suggested that octopamine neurons mediate appetitive reinforcement and dopamine neurons mediate aversive reinforcement in associative learning in crickets...
2016: Scientific Reports
keyword
keyword
35087
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"