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Related Concept Videos

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.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
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Delivery Pathways to the Lysosome01:36

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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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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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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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The Proteasome01:13

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Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
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The Proteasome02:18

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Related Experiment Video

Updated: Nov 4, 2025

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
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Autophagy in metabolism and quality control: opposing, complementary or interlinked functions?

Vojo Deretic1,2, Guido Kroemer3,4,5,6,7

  • 1Autophagy Inflammation and Metabolism Center of Biomedical Research Excellence, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.

Autophagy
|May 26, 2021
PubMed
Summary

Macroautophagy, a key cellular process, functions in both metabolism and quality control. Understanding how these roles coordinate is crucial for fundamental biology and treating diseases through autophagy manipulation.

Keywords:
NASHTorglycolysislysosomesmitochondriamitophagyoxidative phosphorylationsirtuin

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Metabolism

Background:

  • Macroautophagy (autophagy) is recognized for its dual roles in cellular metabolism and quality control.
  • The coordination and overlap between these two functions remain poorly understood.
  • This ambiguity impacts fundamental biological understanding and therapeutic strategies targeting autophagy.

Purpose of the Study:

  • To explore the interconnectedness of metabolic and quality control functions in macroautophagy.
  • To identify key regulatory mechanisms and molecular links governing these dual roles.
  • To provide a framework for future research and autophagy-based interventions.

Main Methods:

  • Review and synthesis of existing literature on autophagy regulation.
  • Analysis of master metabolic regulators (e.g., MTOR, AMPK) and autophagy receptors.
  • Conceptual framework development for understanding the interplay between metabolic and quality control pathways.

Main Results:

  • Autophagy's metabolic regulation is influenced by nutrient availability via master regulators.
  • Selective autophagy receptors target diverse cellular components for degradation.
  • The precise molecular links and priority-setting mechanisms between metabolic and quality control roles require further elucidation.

Conclusions:

  • The interplay between autophagy's metabolic and quality control functions is complex and critical.
  • Further research into these connections is essential for advancing our understanding of cellular homeostasis.
  • Elucidating these links will inform the development of targeted autophagy-based therapies.