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Related Concept Videos

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,...
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...
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 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...
The Proteasome02:18

The Proteasome

Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
The Proteasome01:13

The Proteasome

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.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...

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Related Experiment Video

Updated: Jun 5, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

Targeting autophagy in ALS: a complex mission.

Melissa Nassif1, Claudio Hetz

  • 1Center for Molecular Studies of the Cell, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile.

Autophagy
|January 22, 2011
PubMed
Summary

Autophagy degrades misfolded proteins in neurodegenerative diseases, but overactivation can harm neurons. Combined strategies may repair deficits and enhance autophagy for better neuronal survival.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cellular Biology

Background:

  • Neurodegenerative diseases are characterized by abnormal protein aggregates.
  • Macroautophagy degrades misfolded proteins, offering therapeutic potential.
  • Rapamycin has shown promise in animal models by activating autophagy.

Discussion:

  • Disease-related genes can impair autophagy at multiple levels.
  • Rapamycin treatment exacerbated neurodegeneration in an ALS mouse model.
  • Autophagy's role in neurodegeneration is complex and context-dependent.

Key Insights:

  • Autophagy impairment can be part of disease pathology.
  • Excessive autophagy activation may be detrimental to neurons.
  • Targeting autophagy requires a nuanced, combinatorial approach.

More Related Videos

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase
09:51

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase

Published on: June 30, 2023

Imaging ATG9A, a Multi-Spanning Membrane Protein
07:20

Imaging ATG9A, a Multi-Spanning Membrane Protein

Published on: June 16, 2023

Related Experiment Videos

Last Updated: Jun 5, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
07:20

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

Published on: January 31, 2025

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase
09:51

Cell-Based Drug Screening for Inhibitors of Autophagy Related 4B Cysteine Peptidase

Published on: June 30, 2023

Imaging ATG9A, a Multi-Spanning Membrane Protein
07:20

Imaging ATG9A, a Multi-Spanning Membrane Protein

Published on: June 16, 2023

Outlook:

  • Further research is needed to understand autophagy's dual role.
  • Developing therapies that balance autophagy repair and activation is crucial.
  • Combinatorial strategies may improve neuronal function and survival in neurodegenerative diseases.