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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...
Phagocytosis00:41

Phagocytosis

Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis (“cellular eating”) is one of three major types of endocytosis. Cells use phagocytosis to take in large objects—such as other cells (or their debris), bacteria, and even viruses.
Phagocytosis00:41

Phagocytosis

Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis ("cellular eating") is one of three major types of endocytosis. Cells use phagocytosis to take in large objects, such as other cells (or their debris), bacteria, and even viruses.
The objective of phagocytosis is often destruction. Cells use phagocytosis to eliminate unwelcome visitors, like pathogens (e.g., viruses and bacteria). Many immune system cells, including...
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...

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Related Experiment Video

Updated: May 27, 2026

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body
06:02

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Published on: August 4, 2022

Microautophagy: lesser-known self-eating.

Wen-wen Li1, Jian Li, Jin-ku Bao

  • 1School of Life Sciences, Sichuan University, Chengdu, China.

Cellular and Molecular Life Sciences : CMLS
|November 15, 2011
PubMed
Summary

Microautophagy directly engulfs cellular material for degradation. This process is crucial for maintaining cell health, organelle size, and membrane balance, especially during nutrient stress.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Microautophagy is a fundamental cellular degradation process.
  • It involves direct engulfment of cytoplasmic components by the lysosome.
  • Its role in cellular homeostasis and stress response is increasingly recognized.

Purpose of the Study:

  • To review the molecular machinery of microautophagy.
  • To elucidate its physiological functions.
  • To discuss its relevance in human diseases, particularly those involving lysosomal dysfunction.

Main Methods:

  • Literature review of experimental data on microautophagy.
  • Analysis of signaling pathways regulating microautophagy.
  • Comparison with other autophagy pathways and selective microautophagy forms.

More Related Videos

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

Related Experiment Videos

Last Updated: May 27, 2026

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body
06:02

Analyzing Starvation-Induced Autophagy in the Drosophila melanogaster Larval Fat Body

Published on: August 4, 2022

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

Main Results:

  • Microautophagy mediates direct engulfment and lysosomal degradation of cytoplasmic cargo.
  • It is regulated by signaling pathways and induced by nutrient starvation or rapamycin.
  • It plays key roles in organellar size control, membrane homeostasis, and cell survival.

Conclusions:

  • Microautophagy is a vital, conserved degradative pathway.
  • Understanding its mechanisms is crucial for comprehending cellular health and disease.
  • Further research into microautophagy's role in diseases like those affecting multivesicular bodies is warranted.