Logo Medical Science Monitor

Call: +1.631.470.9640
Mon - Fri 10:00 am - 02:00 pm EST

Contact Us

Logo Medical Science Monitor Logo Medical Science Monitor Logo Medical Science Monitor

01 March 2005 : Original article  

Role of 5-HT1A and 5-HT1B receptors in the hypophagic effect of 5-HT on the structure of feeding behavior.

Juan Manuel Mancilla-Diaz, Rodrigo Erick Escartin-Perez, Veronica Elsa Lopez-Alonso, Benjamin Floran-Garduño, Jose Bernardo Romano-Camacho

Med Sci Monit 2005; 11(3): BR74-79 :: ID: 15379

Abstract

BACKGROUND: Feeding behavior is deeply affected by serotonergic neurotransmission. This regulatory activity is mediated mainly by specific 5-HT1/2 receptors, and the paraventricular nucleus (PVN) plays a key role in this phenomena. In order to reveal the involvement of 5-HT1A and 5-HT1B receptors in the paraventricular nucleus of the hypothalamus (PVN) on serotonin-induced hypophagia, we examined the effects of intra-PVN injections of serotonin in WAY 100635 or SB 216641-pretreated rats on the structure of feeding behavior. MATERIAL/METHODS: Male Wistar rats were kept at 21+/-1 degrees C with a 12 h light /dark cycle on a self-selection feeding paradigm, provided with freely available and separate sources of protein, carbohydrate, fat and water. Blockade of 5-HT1A or 5-HT1B receptors in the paraventricular nucleus was effected by WAY 100635 (2 microg) or SB-216641 (2 microg) pretreatment; ten minutes later, 5-HT (2 microg) was applied into the same nucleus, then food intake and meal patterns were measured in a 30-minute period. The behavioral test was conducted at the beginning of the dark phase. RESULTS: The suppressive effect of 5-HT on carbohydrate intake was blocked by both WAY 100635 and SB 216641 at the beginning of the active (dark) feeding period. CONCLUSIONS: The hypophagic effect induced by 5-HT requires activation of 5-HT1A and 5-HT1B receptors, and the specific contribution of these subtype receptors is different, since the 5-HT1A subtype showed higher behavioral selectivity.

Keywords: Food Preferences - drug effects, Piperazines - pharmacology, Pyridines - pharmacology, Serotonin - administration & dosage, Water - administration & dosage, Benzamides - pharmacology, Dietary Carbohydrates - administration & dosage, Dietary Fats - administration & dosage, Dietary Proteins - administration & dosage, Eating - drug effects, Feeding Behavior - drug effects, Food Preferences - drug effects, Injections, Intraventricular, Oxadiazoles - pharmacology, Paraventricular Hypothalamic Nucleus - physiology, Piperazines - pharmacology, Pyridines - pharmacology, Rats, Wistar, Receptors, Serotonin - physiology, Serotonin - physiology, Serotonin Antagonists - pharmacology, Water - administration & dosage

Add Comment 0 Comments

750 10

Editorial

01 November 2023 : Editorial  

Editorial: Factors Driving New Variants of SARS-CoV-2, Immune Escape, and Resistance to Antiviral Treatments as the End of the COVID-19 Pandemic is Declared

Dinah V. Parums
Science Editor, Medical Science Monitor, International Scientific Information, Inc., Melville,

DOI: 10.12659/MSM.942960

Med Sci Monit 2023; 29:e942960

0:00

In Press

30 Nov 2023 : Review article  

Decoding the Neurological Sequelae of General Anesthesia: A Review

Med Sci Monit In Press; DOI:  

30 Nov 2023 : Clinical Research  

Enhanced Pain Relief and Muscle Growth in Individuals with Low Back Instability: The Impact of Blood Flow R...

Med Sci Monit In Press; DOI:  

29 Nov 2023 : Clinical Research  

Comparative Analysis of Intramedullary Nail versus Plate Fixation for Fibula Fracture in Supination Externa...

Med Sci Monit In Press; DOI:  

29 Nov 2023 : Clinical Research  

Impact of COVID-19 on Academic Burnout among Medical College Students in China: Findings from a Web-Based S...

Med Sci Monit In Press; DOI:  

Most Viewed Current Articles

13 Nov 2021 : Clinical Research  

Acceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...

DOI :10.12659/MSM.932788

Med Sci Monit 2021; 27:e932788

0:00

30 Dec 2021 : Clinical Research  

Retrospective Study of Outcomes and Hospitalization Rates of Patients in Italy with a Confirmed Diagnosis o...

DOI :10.12659/MSM.935379

Med Sci Monit 2021; 27:e935379

0:00

14 Dec 2022 : Clinical Research  

Prevalence and Variability of Allergen-Specific Immunoglobulin E in Patients with Elevated Tryptase Levels

DOI :10.12659/MSM.937990

Med Sci Monit 2022; 28:e937990

0:00

08 Mar 2022 : Review article  

A Review of the Potential Roles of Antioxidant and Anti-Inflammatory Pharmacological Approaches for the Man...

DOI :10.12659/MSM.936292

Med Sci Monit 2022; 28:e936292

0:00

Your Privacy

We use cookies to ensure the functionality of our website, to personalize content and advertising, to provide social media features, and to analyze our traffic. If you allow us to do so, we also inform our social media, advertising and analysis partners about your use of our website, You can decise for yourself which categories you you want to deny or allow. Please note that based on your settings not all functionalities of the site are available. View our privacy policy.

Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750