..., we investigated the roles of the co-transmitters of the pyloric suppressor (PS) neurons, which are located in the stomatogastric nervous system (STNS) of the lobster Homarus americanus . The PS neurons are known to contain histamine; using RT-PCR, we identified a second co-transmitter...

... is monitoring for changes in their phototactic behavior. In most arthropods, histamine has been shown to play a key role in the visual system. Currently, nothing is known about histaminergic signaling in either D. magna or D. pulex . Here, a combination of immunohistochemistry and genome mining was used...

...J. Borycz; J. A. Borycz; A. Kubów; V. Lloyd; I. A. Meinertzhagen SUMMARY Monoamines such as dopamine, histamine and serotonin (5-HT) are widely distributed throughout the brain of the fruit fly Drosophila melanogaster , where many of their actions have been investigated. For example, histamine...

... settle and metamorphose specifically in response to a settlement cue, dissolved histamine, produced by the host alga Delisea pulchra . Older H. purpurascens larvae appear to accept a wider range of host algae, which contain far less histamine than D. pulchra , than newly competent larvae. We tested...

... (ACTH; 7.5 i.u. kg −1 ), serotonin (250 nmol kg −1 ), carbachol (100 μmol kg −1 ), [Asn 1 -Val 5 ]angiotensin II (Ang II; 100 nmol kg −1 ), histamine (0.3–300 μmol l −1 ) and a high-[K + ] saline (60 mmol l −1 ), (2) whether serotonin is co-released with the catecholamines of the chromaffin tissues...

... of its major synaptic input. We present evidence that histamine plays an important role in the EOP–DI–VPLI pathway. Histamine mimics the EOP-mediated inhibition of the DI, and the H2-specific histamine antagonists cimetidine and ranitidine block its inhibitory action. Histamine application to various...

...T. A. Bayer; T. S. McClintock; U. Grünert; B. W. Ache ABSTRACT In two species of lobster, application of the biogenic amine, histamine (HA), to the soma of olfactory receptor cells suppressed both spontaneous and odour-evoked activity, as shown by electrophysiological recording from single cells...

...Peter J. Simmons; Roger C. Hardie ABSTRACT The results presented here are consistent with the hypothesis that histamine is the major neurotransmitter released by photoreceptors of locust ocelli. When histamine is injected by ionophoresis into the locust ocellar neuropile, large second-order...

... and histaminergic antagonists onto the recorded neurones. All substances which blocked the physiological response to light also antagonized the response to ionophoretically applied histamine, supporting the hypothesis that histamine is the neurotransmitter released by insect photoreceptors. In order of potency...