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Introduction to Metabolism01:30

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Metabolism encompasses all biochemical reactions in a living organism, facilitating both the breakdown and synthesis of biomolecules. These metabolic processes are categorized into catabolic and anabolic pathways, which operate in a coordinated manner to ensure energy balance and cellular function.Catabolic Pathways and Energy ReleaseCatabolic pathways involve the breakdown of complex macromolecules such as carbohydrates, lipids, and proteins into smaller structures like monosaccharides, fatty...
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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
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Author Spotlight: Advances in Brain Energy Metabolism Research Using the Drosophila Model
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Scale-spanning crosstalk between metabolism and information processing.

L Felipe Barros1, Ignacio Fernández-Moncada2, Giovanni Marsicano3

  • 1Centro de Estudios Científicos-CECs, Valdivia, Chile; Facultad de Medicina, Universidad San Sebastián, Valdivia, Chile.

Cell Metabolism
|November 18, 2025
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Summary
This summary is machine-generated.

Brain energy metabolism and intercellular signaling are converging. Key metabolic molecules like lactate also act as signals, influencing neural activity during states like exercise and fasting, highlighting their interconnected roles.

Keywords:
cognitionenergy metabolismgliaintercellular signalingmetabolic coreneural computationneuronnon-professional neurotransmitterprofessional neurotransmitter

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Area of Science:

  • Neuroscience
  • Metabolic Biochemistry
  • Cellular Signaling

Background:

  • Traditionally, brain intercellular signaling (neurotransmission) and brain energy metabolism (biochemical processes) were studied as separate fields.
  • Neurotransmission operates rapidly over long distances, while metabolism is slow and diffusion-limited, operating over short distances.
  • This established division is now being challenged by emerging evidence.

Purpose of the Study:

  • To discuss the physiological significance of metabolic molecules functioning as intercellular signals.
  • To highlight the convergence of brain signaling and metabolism research.
  • To foster interdisciplinary collaboration between neuroscience and metabolism researchers.

Main Methods:

  • Literature review and synthesis of existing research.
  • Discussion of key metabolic molecules and their signaling roles.
  • Analysis of physiological states (exercise, fasting, sleep) where this convergence is evident.

Main Results:

  • Metabolic intermediates such as lactate, beta-hydroxybutyrate, and ATP/adenosine also function as intercellular signals.
  • These molecules modulate neural network activity via targets like G protein-coupled receptors.
  • This dual role is observed in physiological states including exercise, fasting, and sleep.

Conclusions:

  • Understanding brain function requires integrating knowledge of both signaling and metabolism.
  • Metabolic pathways and intercellular communication are deeply intertwined.
  • Further interdisciplinary research is crucial to unravel the complexities of this convergence.