Central Interaction Between l-Ornithine and Neuropeptide Y in the Regulation of Feeding Behavior of Neonatal Chicks
文献类型: 外文期刊
作者: Tran, Phuong, V 1 ; Elhussiny, Mohamed Z. 1 ; Tsuru, Yuriko 1 ; Wang, Ying 1 ; Han, Guofeng 1 ; Chowdhury, Vishwajit S. 2 ; Furuse, Mitsuhiro 1 ;
作者机构: 1.Kyushu Univ, Grad Sch Bioresource & Bioenvironm Sci, Lab Regulat Metab & Behav, Fukuoka 8190395, Japan
2.Kyushu Univ, Fac Arts & Sci, Lab Stress Physiol & Metab, Fukuoka 8190395, Japan
3.Natl Inst Anim Sci, Dept Anim Nutri t & Feed, Hanoi, Vietnam
4.Yangzhou Univ, Coll Anim Sci & Technol, Yangzhou 225009, Jiangsu, Peoples R China
5.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing 210014, Peoples R China
关键词: central nervous system; feeding behavior; l-ornithine; neonatal chick; neuropeptide Y
期刊名称:JOURNAL OF POULTRY SCIENCE ( 影响因子:1.5; 五年影响因子:1.7 )
ISSN: 1346-7395
年卷期: 2023 年 60 卷 1 期
页码:
收录情况: SCI
摘要: Ornithine has been identified as a potential satiety signal in the brains of neonatal chicks. We hypothesized that brain nutrient signals such as amino acids and appetite-related neuropeptides synergistically regulate food intake. To test this hy-pothesis, we investigated the interaction between neuropeptide Y (NPY) and ornithine in the control of feeding behavior in chicks and the associated central and peripheral amino acid metabolic processes. Five-day-old chicks were intracerebroven-tricularly injected with saline, NPY (375 pmol), or NPY plus ornithine (2 or 4 mu mol) at 10 mu l per chick, and then subjected to ad libitum feeding conditions; food intake was monitored for 30 min after injection. Brain and plasma samples were collected after the experiment to determine free amino acid concentrations. Co-injection of NPY and ornithine significantly attenuated the orexigenic effect induced by NPY in a dose-dependent manner. Central NPY significantly decreased amino adipic acid, asparagine, gamma-aminobutyric acid, leucine, phenylalanine, tyrosine, and isoleucine levels, but significantly increased lysine levels in the brain. Co-injection of NPY and ornithine significantly increased ornithine and proline levels in all examined brain regions, but decreased diencephalic tryptophan and glycine levels compared with those of the control and NPY-alone groups. Co-injection of NPY and high-dose ornithine significantly decreased methionine levels in all brain regions. Central NPY significantly suppressed the plasma concentrations of amino acids, including proline, asparagine, methionine, phenylalanine, tyrosine, leucine, isoleucine, glycine, glutamine, alanine, arginine, and valine, and this reduction was greater when NPY was co-injected with ornithine. These results suggest that brain ornithine interacts with NPY to regulate food intake in neonatal chicks. Furthermore, central NPY may induce an anabolic effect that is modified by co-injection with ornithine.
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