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Granisetron is a serotonin 5-HT 3 receptor antagonist used as an antiemetic to treat nausea and vomiting following chemotherapy and radiotherapy. Its main effect is to reduce the activity of the vagus nerve , which is a nerve that activates the vomiting center in the medulla oblongata .
The first-generation 5-HT 3 receptor antagonist (ondansetron, dolasetron, granisetron, and tropisetron) have been the most important drugs in antiemetic therapy for emetogenic chemotherapy. They are especially effective in treating acute emesis , occurring in the first 24 hours following chemotherapy . [ 38 ]
Antagonists of the 5-HT 2A receptor are sometimes used as atypical antipsychotics (contrast with typical antipsychotics, which are purely dopamine antagonists). They include, but are not limited to: Cyproheptadine blocks 5-HT 2A, H1 and is a mild anticholinergic. Methysergide is a 5-HT 2A antagonist and nonselective 5-HT 1 receptor blocker.
They act by antagonizing the α 2-adrenergic receptor and certain serotonin receptors such as 5-HT 2A and 5-HT 2C, [1] but also 5-HT 3, [1] 5-HT 6, and/or 5-HT 7 in some cases. By blocking α 2 -adrenergic autoreceptors and heteroreceptors , NaSSAs enhance adrenergic and serotonergic neurotransmission in the brain involved in mood regulation ...
The 5-HT 1B receptor as an example of a metabotropic serotonin receptor. Its crystallographic structure in ribbon representation. 5-HT receptors, 5-hydroxytryptamine receptors, or serotonin receptors, are a group of G protein-coupled receptor and ligand-gated ion channels found in the central and peripheral nervous systems.
The 5-HT 3C, 5-HT 3D and 5-HT 3E genes tend to show peripherally restricted pattern of expression, with high levels in the gut. In human duodenum and stomach, for example, 5-HT 3C and 5-HT 3E mRNA might be greater than for 5-HT 3A and 5-HT 3B. Polymorphism.
The Paleo diet “emulates the eating habits of our Paleolithic ancestors,” who lived between 2.5 million and 10,000 years ago, says Castro.
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