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Keywords: octopamine
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Journal Articles
J Exp Biol (2021) 224 (12): jeb242057.
Published: 15 June 2021
..., injection of a D2 receptor antagonist prohibited the onset of a ‘winner’ effect in dominant animals, suggesting that the facilitating effect of dopamine on small animals is mediated by D2 receptors. Since the inhibitory effect of 1 μmol l −1 dopamine was similar to that seen with 1 μmol l −1 octopamine...
Includes: Supplementary data
Journal Articles
J Exp Biol (2020) 223 (8): jeb216135.
Published: 16 April 2020
.... In principle, we can reduce stress-induced declines in colony health by either removing the stressor or increasing the bees' tolerance to the stressor. This latter option requires a better understanding than we currently have of how honey bees respond to stress. Here, we investigated how octopamine, a stress...
Journal Articles
In collection:
J Exp Biol (2018) 221 (9): jeb178830.
Published: 10 May 2018
... discrimination approach with selective pharmacological injections to evaluate the effect of dopamine and octopamine in appetitive visual learning. Both octopaminergic and dopaminergic antagonists impaired visual discrimination performance, suggesting that both these biogenic amines modulate appetitive visual...
Journal Articles
J Exp Biol (2017) 220 (24): 4644–4653.
Published: 15 December 2017
... diseases. Cardiovascular disease Cardiovascular model Cardiotropic effect Adrenergic system Octopamine Cardiovascular diseases are associated with a multitude of risk factors like diabetes, hypertension, obesity or smoking. Understanding of the underlying pathogenic principles...
Includes: Supplementary data
Journal Articles
In collection:
J Exp Biol (2017) 220 (10): 1925–1930.
Published: 15 May 2017
... fanning behavior in honeybees. Concentrations of two biogenic amines, octopamine and tyramine, are significantly lower in active fanners than in non-fanners, but there is no difference in dopamine and serotonin concentrations. Direct feeding of octopamine and tyramine induced a decrease in fanning...
Journal Articles
J Exp Biol (2017) 220 (5): 868–875.
Published: 1 March 2017
... development time and increased the concentration of the stress neurohormone octopamine. It had no significant effect on haemocyte number, melanization rate, phenoloxidase activity, lysozyme-like activity or nodule production. Predator stress reduced haemolymph glutathione concentrations. It also increased...
Journal Articles
J Exp Biol (2016) 219 (18): 2865–2869.
Published: 15 September 2016
... floridanus actively seeks and self-administers morphine even in the absence of caloric value or additional natural reward. Using HPLC equipped with electrochemical detection, the neurochemicals serotonin, octopamine and dopamine were identified and subsequently quantified, establishing the concurrent...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (10): 1737–1744.
Published: 15 May 2014
...Floris van Breugel; Marie P. Suver; Michael H. Dickinson Recent evidence suggests that flies' sensitivity to large-field optic flow is increased by the release of octopamine during flight. This increase in gain presumably enhances visually mediated behaviors such as the active regulation of forward...
Journal Articles
J Exp Biol (2011) 214 (19): 3286–3293.
Published: 1 October 2011
.... Exposure to elevated levels of octopamine via feeding, injection or bathing of the isolated light organ indicates that it is involved in the regulation of repression. Administration of the octopamine antagonists phentolamine or mianserin results in very high bioluminescence output levels, similar...
Journal Articles
J Exp Biol (2010) 213 (16): 2820–2831.
Published: 15 August 2010
... prolixus , had no statistically significant effect on tick cuticle. Octopamine (OA) and tyramine both caused cuticle stiffening (i.e. opposed plasticization). This suggests a possible inhibitory effect but co-injection of OA with DA did not reduce DA-induced plasticization. The mechanism leading...
Journal Articles
J Exp Biol (2010) 213 (7): 1100–1106.
Published: 1 April 2010
... such as biogenic amines. To test our hypothesis, we studied the effects of octopamine (OA) and serotonin (5-hydroxytryptamine, 5-HT) on the coding properties of pheromone-sensitive AL neurons in virgin and newly mated males. We show that AL neuron sensitivity increased in newly mated males after injection of OA...
Journal Articles
J Exp Biol (2010) 213 (5): 842–852.
Published: 1 March 2010
...Christian Flecke; Andreas Nolte; Monika Stengl SUMMARY Octopamine causes time-dependent disadaptation of pheromone-sensitive olfactory receptor neurons (ORNs) of Manduca sexta . Because the majority of insect octopamine receptors are positively coupled to adenylyl cyclases we examined whether...
Includes: Supplementary data
Journal Articles
J Exp Biol (2009) 212 (22): 3605–3611.
Published: 15 November 2009
... transitions caused by bath-application of carbachol or octopamine (OA). Spontaneous transitions from silence to activity were marked by the appearance of a standing inward current and periodic outward currents in both types of motor neurons. Bath-application of carbachol also led to the development...
Journal Articles
J Exp Biol (2009) 212 (2): 163–168.
Published: 15 January 2009
... ; Nathanson et al., 1993 ). In mammals, the biogenic amine systems disrupted by cocaine [principally dopamine(DA)] modulate both motor control and reward processing( Cenci, 2007 ; Uhl et al., 2002 ; Wise and Rompre, 1989 ; Wise, 2004 ). In insects,biogenic amines [principally DA and octopamine (OA)] also...
Journal Articles
J Exp Biol (2008) 211 (14): 2346–2357.
Published: 15 July 2008
...Edgar Buhl; Klaus Schildberger; Paul A. Stevenson SUMMARY A central question in behavioural control is how central pattern generators(CPGs) for locomotion are activated. This paper disputes the key role generally accredited to octopamine in activating the CPG for insect flight. In deafferented...
Journal Articles
J Exp Biol (2007) 210 (24): 4411–4417.
Published: 15 December 2007
... the effect of an octopamine receptor agonist and an antagonist on the locomotor behavior of stung and control cockroaches. We show that in cockroaches stung by a wasp the octopamine receptor agonist chlordimeform induces a significant increase in spontaneous walking. In good agreement, in control individuals...
Journal Articles
J Exp Biol (2006) 209 (24): 4858–4868.
Published: 15 December 2006
... (DATs) and norepinephrine (NETs). An additional SLC6 monoamine transporter (OAT), is responsible for the selective uptake of the phenolamines octopamine and tyramine by insect neurons. We have characterized a similar high-affinity phenoloamine transporter expressed in the CNS of the earthworm Lumbricus...
Includes: Supplementary data
Journal Articles
J Exp Biol (2006) 209 (14): 2774–2784.
Published: 15 July 2006
...Herman K. Lehman; David J. Schulz; Andrew B. Barron; Lydia Wraight; Chris Hardison; Sandra Whitney; Hideaki Takeuchi; Rajib K. Paul; Gene E. Robinson SUMMARY The biogenic amine octopamine (OA) is involved in the regulation of honey bee behavioral development; brain levels are higher in foragers...
Journal Articles
J Exp Biol (2006) 209 (9): 1746–1756.
Published: 1 May 2006
... intracellular recordings from identified command-like brain interneurons demonstrated that 5-HT, especially in combination with octopamine, inhibited swim-triggering neuron Tr1, as well as swim-inactivating neurons Tr2 and SIN1. Although 5-HT inhibited elements of the swim-inactivation pathway, rather than...
Journal Articles
J Exp Biol (2004) 207 (21): 3749–3756.
Published: 1 October 2004
... far induced luminescence in two other ophiuroid species, Ophiopsila aranea and Ophiopsila californica. The aim of this work was thus to investigate the putative involvement of two biogenic amines, tryptamine and octopamine, in light emission of three ophiuroid species. A. filiformis responds to both...