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Hypothalamic integration of nutrient sensing in fish.

José L Soengas1, Sara Comesaña1, Marta Conde-Sieira1

  • 1Centro de Investigación Mariña, Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía, Universidade de Vigo, 36310 Vigo, Spain.

The Journal of Experimental Biology
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PubMed
Summary
This summary is machine-generated.

Fish hypothalamus senses nutrients like glucose, fatty acids, and amino acids to control feeding. Nutrient sensor activation suppresses appetite by altering neuropeptide expression in the brain.

Keywords:
Feed intakeFishHypothalamusNutrient sensing

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Area of Science:

  • Neuroscience
  • Animal Physiology
  • Endocrinology

Background:

  • The hypothalamus is central to regulating feeding behavior in fish.
  • Nutrient sensing mechanisms in fish are complex and involve specific hypothalamic nuclei.

Purpose of the Study:

  • To review current knowledge on nutrient sensing (glucose, fatty acids, amino acids) in fish.
  • To understand how this information is integrated in the hypothalamus to modulate feed intake.

Main Methods:

  • Review of existing literature on hypothalamic function and feeding behavior in fish.
  • Analysis of neuronal pathways and neuropeptide signaling involved in appetite regulation.

Main Results:

  • Specific hypothalamic neurons (nucleus lateralis tuberalis) possess nutrient sensors and hormone receptors.
  • Activation of nutrient sensors leads to anorexigenic effects via neuropeptide modulation (Pomc, Cart upregulation; Npy, Agrp downregulation).
  • Hypothalamic neurons interact with other brain regions for intricate feeding behavior control.

Conclusions:

  • Nutrient sensing in the hypothalamus is a key regulator of fish feeding behavior.
  • Understanding these mechanisms is vital for fish evolution studies and aquaculture advancements.