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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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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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PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
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Related Experiment Video

Updated: Apr 11, 2026

A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae
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WIPI-Mediated Autophagy and Longevity.

Mona Grimmel1, Charlotte Backhaus1, Tassula Proikas-Cezanne2

  • 1Autophagy Laboratory, Department of Molecular Biology, Interfaculty Institute of Cell Biology, Faculty of Science, Eberhard Karls University Tuebingen, Auf der Morgenstelle 15, 72076 Tuebingen, Germany.

Cells
|May 27, 2015
PubMed
Summary

Autophagy, regulated by WIPI proteins, is crucial for cellular health and longevity. Disrupting WIPI protein function in C. elegans significantly shortens lifespan, highlighting their role in aging.

Keywords:
ATG-18C. elegansEPG-6WIPIWIPI-1WIPI-2autophagylongevity

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Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Aging Research

Background:

  • Autophagy is a vital cellular process for homeostasis and survival.
  • Autophagy-related (ATG) genes are linked to longevity.
  • mTOR signaling regulates autophagy initiation via WIPI proteins.

Purpose of the Study:

  • To review the role of WIPI proteins in autophagy and aging.
  • To explore the molecular mechanisms linking WIPI proteins to longevity.
  • To discuss therapeutic potential of targeting WIPI proteins for age-related diseases.

Main Methods:

  • Review of scientific literature on autophagy and WIPI proteins.
  • Analysis of functional studies in model organisms, specifically C. elegans.
  • Examination of the regulatory network involving mTOR, PI3P, and WIPI proteins.

Main Results:

  • WIPI proteins are essential for autophagosome formation by detecting PI3P.
  • Functional knockout of WIPI homologues (ATG-18, EPG-6) in C. elegans reduces adult lifespan.
  • This demonstrates that autophagy factors, including WIPI proteins, are critical determinants of longevity.

Conclusions:

  • WIPI proteins play a fundamental role in autophagy and are key regulators of lifespan.
  • Understanding WIPI protein function provides insights into the molecular basis of aging.
  • Targeting WIPI proteins may offer a therapeutic strategy to combat age-related diseases.