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Related Concept Videos

Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Autophagy01:27

Autophagy

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,...
Cellular Injury V: Apoptosis and Autophagy01:22

Cellular Injury V: Apoptosis and Autophagy

Cells respond to damage and stress through highly coordinated processes that decide whether they survive or undergo controlled self-destruction. Two major pathways involved in this regulation are apoptosis, a type of programmed cell death, and autophagy, a survival mechanism that helps cells adapt to adverse conditions.ApoptosisApoptosis removes aged or injured cells to maintain tissue balance. During this process, the cell shrinks, chromatin condenses and fragments, and membrane-bound...
Autophagic Cell Death01:18

Autophagic Cell Death

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.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Cellular Respiration01:18

Cellular Respiration

Cellular respiration is a crucial metabolic process through which cells obtain energy from organic substances, mainly glucose, to produce adenosine triphosphate (ATP). This process includes the oxidation of substrates and the transfer of electrons to a separate electron acceptor, facilitating ATP synthesis through a sequence of biochemical reactions.Glycolysis: The Initial StepGlycolysis is the first stage of cellular respiration, occurring in the cytoplasm of both prokaryotic and eukaryotic...
Introduction to Metabolism01:30

Introduction to Metabolism

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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Related Experiment Video

Updated: Jun 2, 2026

In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice
08:40

In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice

Published on: November 22, 2017

Autophagy in the cellular energetic balance.

Rajat Singh1, Ana Maria Cuervo

  • 1Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA. rajat.singh@einstein.yu.edu

Cell Metabolism
|May 3, 2011
PubMed
Summary

Autophagy, a cellular process for removing damaged components, is strongly activated by starvation. This process helps cells generate energy by breaking down constituents and mobilizing energy stores, linking autophagy to metabolism.

Area of Science:

  • Cell Biology
  • Metabolism

Background:

  • Autophagy is a fundamental cellular process responsible for degrading damaged proteins and organelles within lysosomes.
  • While often induced by cellular damage, autophagy is also a key response to nutrient deprivation (starvation).

Purpose of the Study:

  • To elucidate the role of autophagy in cellular energy balance, particularly during starvation.
  • To investigate the connection between autophagy and the metabolism of lipids and carbohydrates.

Main Methods:

  • The study focuses on the known mechanisms of autophagy activation and its downstream effects.
  • Analysis of the interplay between autophagic pathways and metabolic processes.

Main Results:

  • Autophagy activation during starvation facilitates the breakdown of cellular components for energy production.

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Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
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Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

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Visualizing Mitophagy with Fluorescent Dyes for Mitochondria and Lysosome

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In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice
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In Vitro and In Vivo Detection of Mitophagy in Human Cells, C. Elegans, and Mice

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Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
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  • Autophagy contributes to the mobilization of cellular energy reserves, including lipids and carbohydrates.
  • A dynamic feedback loop exists between autophagy and cellular energy metabolism.

    • Conclusions:

    • Autophagy plays a critical role in cellular adaptation to nutrient scarcity by providing energy through catabolism.
    • The interplay between autophagy and lipid/carbohydrate metabolism highlights a sophisticated regulatory mechanism for maintaining cellular energy homeostasis.