Hypothalamic integration of nutrient sensing in fish.

Autor:	Soengas JL; Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, 36310 Vigo, Spain., Comesaña S; Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, 36310 Vigo, Spain., Conde-Sieira M; Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, 36310 Vigo, Spain., Blanco AM; Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, 36310 Vigo, Spain.
Jazyk:	angličtina
Zdroj:	The Journal of experimental biology [J Exp Biol] 2024 Aug 01; Vol. 227 (15). Date of Electronic Publication: 2024 Jul 31.
DOI:	10.1242/jeb.247410
Abstrakt:	The hypothalamus plays a crucial role in regulating feeding behavior in fish. In this Review, we aim to summarise current knowledge on specific mechanisms for sensing glucose, fatty acids and amino acids in fish, and to consider how this information is integrated in the hypothalamus to modulate feed intake. In fish, specific neuronal populations in the nucleus lateralis tuberalis (NLTv) of the hypothalamus are equipped with nutrient sensors and hormone receptors, allowing them to respond to changes in metabolite levels and hormonal signals. These neurons produce orexigenic (Npy and Agrp) and anorexigenic (Pomc and Cart) neuropeptides, which stimulate and suppress appetite, respectively. The modulation of feeding behavior involves adjusting the expression of these neuropeptides based on physiological conditions, ultimately influencing feeding through reciprocal inhibition of anorexigenic and orexigenic neurons and signalling to higher-order neurons. The activation of nutrient sensors in fish leads to an enhanced anorexigenic effect, with downregulation of agrp and npy, and upregulation of cart and pomc. Connections between hypothalamic neurons and other populations in various brain regions contribute to the intricate regulation of feeding behaviour in fish. Understanding how feed intake is regulated in fish through these processes is relevant to understanding fish evolution and is also important in the context of aquaculture. Competing Interests: Competing interests The authors declare no competing or financial interests. (© 2024. Published by The Company of Biologists Ltd.)
Databáze:	MEDLINE
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