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Autophagy01:27

Autophagy

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
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Autophagic Cell Death01:18

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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
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Related Experiment Video

Updated: Apr 15, 2026

A Human Blood-Brain Interface Model to Study Barrier Crossings by Pathogens or Medicines and Their Interactions with the Brain
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Autophagy: Bridging the brain-periphery connection.

Camila Sandoval-Valenzuela1,2, Diego Acuña-Catalán3, Daniela Pinto-Núñez1,2

  • 1Department of Basic Sciences, Faculty of Medicine, Universidad San Sebastián, Santiago, Chile.

Neural Regeneration Research
|April 14, 2026
PubMed
Summary
This summary is machine-generated.

Autophagy, a cellular process, regulates communication between the brain and organs. Its dysfunction links to neurodegenerative and metabolic diseases, highlighting its role in systemic health.

Keywords:
brainglucose homeostasishypothalamusneurodegenerative diseasesneuroinflammationneuropeptidesobesitysecretory autophagy

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Area of Science:

  • Cellular Biology
  • Physiology
  • Neuroscience

Background:

  • Autophagy is a core cellular degradation and recycling process.
  • It plays a key role in maintaining intracellular homeostasis.
  • Emerging evidence shows autophagy's role in inter-organ communication.

Purpose of the Study:

  • To review the role of autophagy in regulating systemic physiology.
  • To explore autophagy's function in brain-periphery communication.
  • To discuss the implications of autophagy dysfunction in disease.

Main Methods:

  • Literature review of autophagy mechanisms.
  • Analysis of autophagy's role in neurons, glia, immune, and metabolic cells.
  • Examination of autophagy's impact on neuroinflammation, metabolism, and gut-brain axis.

Main Results:

  • Autophagy coordinates immune responses, metabolic balance, and inter-organ signaling.
  • It modulates local and systemic functions impacting neuroinflammation and energy homeostasis.
  • Autophagy dysfunction disrupts brain-periphery communication, contributing to disease.

Conclusions:

  • Autophagy is a critical regulator of systemic physiology and inter-organ communication.
  • Understanding autophagy-dependent signaling offers therapeutic targets for chronic diseases.
  • Restoring autophagy may help prevent neurodegenerative and metabolic disorders.