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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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Delivery Pathways to the Lysosome01:36

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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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Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
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Autophagic Cell Death01:18

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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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In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Related Experiment Video

Updated: Nov 17, 2025

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
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Autophagy in liver diseases.

Elias Kouroumalis1, Argryro Voumvouraki2, Aikaterini Augoustaki3

  • 1Liver Research Laboratory, University of Crete Medical School, Heraklion 71110, Greece.

World Journal of Hepatology
|February 15, 2021
PubMed
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Autophagy, the liver

Keywords:
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Area of Science:

  • Hepatology
  • Cellular Biology
  • Molecular Medicine

Background:

  • Autophagy is a fundamental cellular process for degrading and recycling cellular components.
  • It plays a critical role in maintaining liver homeostasis and responding to cellular stress.
  • Dysregulation of autophagy is implicated in various liver pathologies.

Purpose of the Study:

  • To review the fundamental functions of autophagy in the liver.
  • To discuss the dual role of autophagy in liver diseases, particularly hepatocellular carcinoma.
  • To explore the implications of autophagy in diverse liver conditions and cell types.

Main Methods:

  • Literature review of experimental and clinical studies on autophagy in liver diseases.
  • Analysis of data on autophagy regulation and its specialized forms (lipophagy, mitophagy).
  • Comparison of autophagy's impact on different hepatic cell populations.

Main Results:

  • Autophagy is crucial for liver homeostasis but can paradoxically promote hepatocellular carcinoma.
  • Lipophagy and mitophagy are involved in the pathogenesis of fatty liver disease, fibrosis, viral hepatitis, and other liver disorders.
  • Autophagy modulation has differential effects on hepatocytes versus non-parenchymal liver cells.

Conclusions:

  • Autophagy is a complex, context-dependent process in liver health and disease.
  • Targeting autophagy presents potential therapeutic strategies for various liver conditions.
  • Further clinical research is needed to translate extensive experimental findings into effective treatments.