Effects of Neurotensin and LANT-6 on Food Intake in Chicks
نویسندگان
چکیده
Neurotensin (NT) and an NT-related peptide (Lys, Asn, NT; LANT-6) are produced in the chicken brain and intestine, and these peptides are encoded by the same precursor gene (NT/LANT-6 precursor). Although it has been reported that the central administration of NT suppresses food intake in mammals, the effect of NT and LANT-6 on feeding behavior in birds has not yet been investigated. In this paper, we analyzed the expression levels of NT/LANT-6 precursor and the NT receptor (NTR1) mRNAs in the hypothalamic infundibulum, an important region for regulating feeding behaviors. We also examined the effects of NT and LANT-6 administration on food intake in chicks. Real-time PCR analysis showed that NT/LANT-6 precursor and NTR1 mRNAs had moderately high expression in the hypothalamic infundibulum. Further, in the hypothalamic infundibulum, the mRNA level of NT/LANT-6 precursor showed a trend toward increasing during postnatal development and increased 2.9-fold after a 48 hour fast, although the NTR1 mRNA level was not changed in both analyses. Contrary to our expectations, central administration of NT or LANT-6 had no effect on food intake in chicks.
منابع مشابه
Phylogenetic conservatism in the presence of a neurotensin-related hexapeptide in neurons of globus pallidus.
The vast majority of the pallidal neurons of the hamster, pigeon, caiman and turtle basal telencephalon were positively labeled by an antiserum against LANT-6, a neurotensin-like hexapeptide. In sharks also, LANT-6-positive neurons were observed in the apparent equivalent of the globus pallidus. These results, which imply the coexistence of a LANT-6-like peptide with gamma-aminobutyric acid (GA...
متن کاملEffects of chlorpheniramine (histamine H1 receptor antagonist) on food and water intake in broiler chickens in hunger and satiety
The role of histamine in the regulation of food and water intake in mammals and birds of the review, this study evaluated the effects of intraperitoneal administration of chlorpheniramine as histamine H1-receptor antagonist, in broiler chicks on feed intake and satiety in water and was hungry. 32 male Ross broiler chicks reared in groups of four weeks, 16 samples (control and test) were then in...
متن کاملEffects of chlorpheniramine (histamine H1 receptor antagonist) on food and water intake in broiler chickens in hunger and satiety
The role of histamine in the regulation of food and water intake in mammals and birds of the review, this study evaluated the effects of intraperitoneal administration of chlorpheniramine as histamine H1-receptor antagonist, in broiler chicks on feed intake and satiety in water and was hungry. 32 male Ross broiler chicks reared in groups of four weeks, 16 samples (control and test) were then in...
متن کاملEffect of famotidine (histamine H2-receptor antagonist) on food and water intake in broiler chickens in a state of hunger and satiety
The role of histamine in the regulation of food and water intake in mammals and birds of the review, this study evaluated the effects of intraperitoneal administration of famotidine as histamine H2 -receptor antagonist, in broiler chicks on feed intake and satiety in water and was hungry. 32 male Ross broiler chicks reared in groups of four weeks, 16 samples (control and test ) were then inject...
متن کاملCentral effect of mammalian oxyntomodulin on food intake in non-fasted and fasted chicks
Oxyntomodulin (OXM), a proglucagon-derived peptide, is a well known anorexigenic peptide found inthe gut and brain of mammals. The present study was carried out to investigate the central effect of OXM onfood intake in non-fasted and fasted Ross broiler chicks. At four weeks of age, a guide cannula wasstereotaxically implanted into the right lateral ventricle of each bird. Two experiments were ...
متن کامل