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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.
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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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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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Assessing Autophagic Flux by Measuring LC3, p62, and LAMP1 Co-localization Using Multispectral Imaging Flow Cytometry
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Assessing mammalian autophagy.

Sharon A Tooze1, Hannah C Dooley, Harold B J Jefferies

  • 1London Research Institute, Cancer Research UK, 44 Lincolns Inn Fields, London, WC2A 3LY, UK, sharon.tooze@cancer.org.uk.

Methods in Molecular Biology (Clifton, N.J.)
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PubMed
Summary
This summary is machine-generated.

Autophagy is a cellular self-cleaning process involving phagophores, autophagosomes, and autolysosomes. This study details morphological methods using LC3 and WIPI2 markers to analyze autophagy formation and induction.

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Area of Science:

  • Cell Biology
  • Molecular Biology

Background:

  • Autophagy is a conserved cellular process for degrading damaged components via vesicular compartments: phagophore, autophagosome, and autolysosome.
  • This pathway is crucial for cell survival, removing aggregated proteins, damaged organelles, and pathogens.

Purpose of the Study:

  • To describe reliable morphological techniques for studying autophagy.
  • To validate these methods using key markers like LC3 and WIPI2.

Main Methods:

  • Morphological analysis of fixed cells to study autophagosome formation and trafficking.
  • Immunofluorescence assays utilizing antibodies against microtubule-associated protein 1A/1B-light chain 3 (LC3) and WD repeat domain, phosphoinositide interacting 2 (WIPI2).

Main Results:

  • The study outlines standard morphological techniques for autophagy research.
  • LC3 and WIPI2 are presented as reliable markers for assessing autophagy induction and autophagosome formation.

Conclusions:

  • Morphological analysis, particularly with LC3 and WIPI2 markers, provides a robust starting point for autophagy studies.
  • These methods aid in understanding autophagosome formation and cellular responses to stimuli like starvation.