ArticleInvertebrate neuroscience : IN2010
The effect of a selective octopamine antagonist, epinastine, on pharyngeal pumping in Caenorhabditis elegans.
Article in Invertebrate neuroscience : IN, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Behavioral and genetic analysis of the effects of the psychedelic 2,5-dimethoxy-4-iodoamphetamine (DOI) in C. elegans.PloS one · 2025Article
- Article
- A Novel and Functionally Diverse Class of Acetylcholine-Gated Ion Channels.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023Article
- Octopamine signaling in the metazoan pathogenDisease models & mechanisms · 2018Article
- Multiple excitatory and inhibitory neural signals converge to fine-tune Caenorhabditis elegans feeding to food availability.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2016Article
- Article
- The regulation of feeding and metabolism in response to food deprivation in Caenorhabditis elegans.Invertebrate neuroscience : IN · 2010Review
- Using Caenorhabditis elegans as a Model for Obesity Pharmacology Development.American journal of therapeuticsArticle
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Authors and funding
3 authors.
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Abstract
This paper investigates the effect of epinastine, a selective octopamine antagonist in invertebrates, in Caenorhabditis elegans. Specifically, its ability to block the inhibitory action of octopamine on C. elegans-isolated pharynx was assayed. Isolated pharynxes were stimulated to pump by the addition of 500 nM 5-hydroxytryptamine (5-HT) (113 ± 2 per 30 s, n = 15). Octopamine inhibited the 5-HT-induced pumping in a concentration-dependent manner (threshold 1-5 μM) with a 61 ± 11% inhibition with 50 μM (n = 5). Epinastine (0.1 μM) antagonized the inhibitory response to octopamine (P < 0.001; n = 15). Tyramine also inhibited pharyngeal pumping induced by 5-HT but was less potent than octopamine. Tyramine, 50 μM to 1 mM, gave a transient inhibition e.g. of 40 ± 5% at 50 μM (n = 5). A higher (10 μM) concentration of epinastine was required to block the tryamine response compared with octopamine. It is concluded that epinastine selectively antagonizes the effect of octopamine on C. elegans pharynx. Further studies are required to test its selectivity for octopamine in other tissues and other nematodes.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.