Biomaterial Database

Hyper- and hyposensitivity of central serotonin receptors:[3H]serotonin binding and functional studies in the rat. 1980

R Samanin, and T Mennini, and A Ferraris, and C Bendotti, and F Borsini

The effect of repeated treatment with D-fenfluramine, a serotonin releaser, or methergoline, a serotonin antagonist, on [3H]5-HT binding was studied in various rat brain areas. In animals with the same pretreatments, the anorectic activity of m-chlorophenylpiperazine, a serotonin agonist, was investigated. A 14-day treatment with D-fenfluramine caused a significant decrease in the number of [3H]5-HT binding sites (Bmax) in the diencephalon. A reduction of binding sites was found in the cortex too when D-fenfluramine was administered for 28 days. Methergoline caused no changes of [3H)5-HT binding in any brain area examined when given for 14 days but 28-day treatment led to a significant increase in the striatum, hippocampus and cortex. D-Fenfluramine and methergoline caused, respectively, a decrease and increase in the effect of m-chlorophenylpiperazine on food intake. The data show that central 5-HT receptor numbers and sensitivity may change after repeated treatments with drugs acting on brain serotonin.

UI	MeSH Term	Description	Entries
D008711	Metergoline	A dopamine agonist and serotonin antagonist. It has been used similarly to BROMOCRIPTINE as a dopamine agonist and also for MIGRAINE DISORDERS therapy.	Methergoline,Liserdol
D011985	Receptors, Serotonin	Cell-surface proteins that bind SEROTONIN and trigger intracellular changes which influence the behavior of cells. Several types of serotonin receptors have been recognized which differ in their pharmacology, molecular biology, and mode of action.	5-HT Receptor,5-HT Receptors,5-Hydroxytryptamine Receptor,5-Hydroxytryptamine Receptors,Receptors, Tryptamine,Serotonin Receptor,Serotonin Receptors,Tryptamine Receptor,Tryptamine Receptors,Receptors, 5-HT,Receptors, 5-Hydroxytryptamine,5 HT Receptor,5 HT Receptors,5 Hydroxytryptamine Receptor,5 Hydroxytryptamine Receptors,Receptor, 5-HT,Receptor, 5-Hydroxytryptamine,Receptor, Serotonin,Receptor, Tryptamine,Receptors, 5 HT,Receptors, 5 Hydroxytryptamine
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D004435	Eating	The consumption of edible substances.	Dietary Intake,Feed Intake,Food Intake,Macronutrient Intake,Micronutrient Intake,Nutrient Intake,Nutritional Intake,Ingestion,Dietary Intakes,Feed Intakes,Intake, Dietary,Intake, Feed,Intake, Food,Intake, Macronutrient,Intake, Micronutrient,Intake, Nutrient,Intake, Nutritional,Macronutrient Intakes,Micronutrient Intakes,Nutrient Intakes,Nutritional Intakes
D005260	Female		Females
D005277	Fenfluramine	A centrally active drug that apparently both blocks serotonin uptake and provokes transport-mediated serotonin release.	Fintepla,Fenfluramine Hydrochloride,Fenfluramine Hydrochloride, (+-)-Isomer,Fenfluramine Hydrochloride, R-Isomer,Fenfluramine, (+-)-Isomer,Fenfluramine, R-Isomer,Isomeride,Pondimin,Fenfluramine Hydrochloride, R Isomer,Fenfluramine, R Isomer,Hydrochloride, Fenfluramine
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D012701	Serotonin	A biochemical messenger and regulator, synthesized from the essential amino acid L-TRYPTOPHAN. In humans it is found primarily in the central nervous system, gastrointestinal tract, and blood platelets. Serotonin mediates several important physiological functions including neurotransmission, gastrointestinal motility, hemostasis, and cardiovascular integrity. Multiple receptor families (RECEPTORS, SEROTONIN) explain the broad physiological actions and distribution of this biochemical mediator.	5-HT,5-Hydroxytryptamine,3-(2-Aminoethyl)-1H-indol-5-ol,Enteramine,Hippophaine,Hydroxytryptamine,5 Hydroxytryptamine
D013239	Stereotyped Behavior	Relatively invariant mode of behavior elicited or determined by a particular situation; may be verbal, postural, or expressive.	Behavior, Stereotyped,Behaviors, Stereotyped,Stereotyped Behaviors