Data/hora: 10/06/2024 17:11:20

Provedor de dados: 	Revista Brasileira de Ciência Avícola	
País: 	Brazil	
Título: 	CRF1/CRF2 and MC3/MC4 Receptors Affect Glutamate- Induced Food Intake in Neonatal Meat-Type Chicken	
Autores: 	Ahmadi,F; Zendehdel,M; Babapour,V; Panahi,N.	
Data: 	2019-01-01	
Ano: 	2019	
Palavras-chave: 	Glutamate; Melanocortin; Corticotrophin; Food intake; Neonatal chicken.	
Resumo: 	ABSTRACT Central glutamate, melanocortin and corticotropin systems have mediatory role on several physiologic functions in the brain, but their interactions on appetite regulation are not fully elicited. So, the aim of the current study was to determine interaction of the glutamate with melanocortin and corticotropin systems on food intake in 3-h food-deprived (FD3) neonatal meat-type chicken. In experiment 1, chicken intracerebroventricular (ICV) injected (A) phosphate-buffered saline (PBS), (B) glutamate (75 nmol), (C) glutamate (150 nmol) and (D) glutamate (300 nmol). In experiment 2, (A) PBS, (B) astressin-B (CRF1/CRF2 receptors antagonist, 30 µg), (C) glutamate (300 nmol) and (D) astressin-B+glutamate were ICV injected. Experiments 3-5 were similar to experiment 2, except birds were injected with astressin2-B (CRF2 receptor antagonist, 30 µg), SHU9119 (MC3/MC4 receptor antagonist, 0.5 nmol) and MCL0020 (MC4 receptor antagonist, 0.5 nmol) instead of the astressin-B. In experiment 6, the injections were (A) PBS, (B) MTII (MC3/MC4 receptor agonist, 2.5ng), (C) glutamate (75nmol) and (D) MTII+glutamate. Then, cumulative feed intake was recorded at 30, 60 and 120 minutes after injection. According to the results, dose dependent hypophagia observed by ICV injection of the glutamate (75, 150 and 300nmol) compared to control group in neonatal broiler chicken (p&lt;0.05). Co-injection of the astressin-B+glutamate and astressin2-B+glutamate decreased glutamate-induced hypophagia in neonatal broiler chicken (p&lt;0.05). Co-injection of the glutamate+MC3/MC4 receptors antagonist decreased hypophagic effect of the glutamate (p&lt;0.05). These results suggested hypophagic effect of the glutamate mediates via CRF1/CRF2 and MC3/MC4 receptors in chickens.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100322	
Editor: 	Fundação APINCO de Ciência e Tecnologia Avícolas	
Relação: 	10.1590/1806-9061-2018-0821	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Poultry Science  v.21 n.1 2019	
Fonte: 	info:eu-repo/semantics/openAccess