Biomaterial Database

Effect of a serotonin 1-A agonist on food intake of Osborne-Mendel and S5B/P1 rats. 2000

C L White, and K Kashima, and G A Bray, and D A York

Pennington Biomedical Research Center, Louisiana State University, 6400 Perkins Road, Baton Rouge, LA 70808, USA.

The effect on food intake of 8-hydroxy-2-(di-n-propylamino) tetralin (8-OH-DPAT), a serotonin 1-A agonist, has been evaluated in two strains of rats that differ in their sensitivity to becoming obese while eating a high-fat diet. Male Osborne-Mendel (OM) and S5B/Pl rats were tested at 8 weeks and 16 weeks of age. Both strains were adapted to choose between two diets-a 56% fat energy diet, and a 10% fat energy diet-which were equicaloric for protein (24% energy). Daily food intake was measured for 2 weeks before injection of 8-OH-DPAT. The younger OM rats had no diet preference, while the older OM rats preferred the high-fat diet. The younger S5B/P1 rats preferred the low-fat diet, while the older S5B/P1 rats had no diet preference. Satiated rats were injected subcutaneously with 8-OH-DPAT at doses of 0.3, 1.0, or 3.0 mg/kg or vehicle. During the light phase, subcutaneous 8-OH-DPAT increased the intake of the high-fat diet in the 16-week-old OM rats but not the 8-week-old OM rats. 8-OH-DPAT had no effect on the low-fat diet intake in either age OM rat. The 8-week-old S5B/P1 rats showed a significant decrease in intake of the high-fat diet in response to 8-OH-DPAT, whereas an increase in the intake of the low-fat diet was observed in the older S5B/P1 rats. These data are consistent with the hypothesis that increased fat preference in Osborne-Mendel rats may result in part from altered serotonin activity of 5-HT(1A) receptors.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D011919	Rats, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations or by parent x offspring matings carried out with certain restrictions. This also includes animals with a long history of closed colony breeding.	August Rats,Inbred Rat Strains,Inbred Strain of Rat,Inbred Strain of Rats,Inbred Strains of Rats,Rat, Inbred Strain,August Rat,Inbred Rat Strain,Inbred Strain Rat,Inbred Strain Rats,Inbred Strains Rat,Inbred Strains Rats,Rat Inbred Strain,Rat Inbred Strains,Rat Strain, Inbred,Rat Strains, Inbred,Rat, August,Rat, Inbred Strains,Rats Inbred Strain,Rats Inbred Strains,Rats, August,Rats, Inbred Strain,Strain Rat, Inbred,Strain Rats, Inbred,Strain, Inbred Rat,Strains, Inbred Rat
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
D004041	Dietary Fats	Fats present in food, especially in animal products such as meat, meat products, butter, ghee. They are present in lower amounts in nuts, seeds, and avocados.	Fats, Dietary,Dietary Fat,Fat, Dietary
D004305	Dose-Response Relationship, Drug	The relationship between the dose of an administered drug and the response of the organism to the drug.	Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
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
D005518	Food Preferences	The selection of one food over another.	Food Selection,Food Preference,Food Selections,Preference, Food,Preferences, Food,Selection, Food,Selections, Food
D000375	Aging	The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.	Senescence,Aging, Biological,Biological Aging
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
D017366	Serotonin Receptor Agonists	Endogenous compounds and drugs that bind to and activate SEROTONIN RECEPTORS. Many serotonin receptor agonists are used as ANTIDEPRESSANTS; ANXIOLYTICS; and in the treatment of MIGRAINE DISORDERS.	5-HT Agonists,5-Hydroxytryptamine Agonists,Serotonin Agonists,5-HT Agonist,5-Hydroxytrytamine Agonist,Receptor Agonists, Serotonin,Serotonergic Agonist,Serotonergic Agonists,Serotonin Agonist,Serotonin Receptor Agonist,5 HT Agonist,5 HT Agonists,5 Hydroxytryptamine Agonists,5 Hydroxytrytamine Agonist,Agonist, 5-HT,Agonist, 5-Hydroxytrytamine,Agonist, Serotonergic,Agonist, Serotonin,Agonist, Serotonin Receptor,Agonists, 5-HT,Agonists, 5-Hydroxytryptamine,Agonists, Serotonergic,Agonists, Serotonin,Agonists, Serotonin Receptor,Receptor Agonist, Serotonin