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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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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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Liver Regeneration01:24

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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Phagocytosis of Apoptotic Cells01:17

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Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
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Overview of Lipid Metabolism01:24

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Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
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Updated: Aug 8, 2025

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
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Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy

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Autophagy: A Cellular Guardian against Hepatic Lipotoxicity.

Rohit Anthony Sinha1

  • 1Department of Endocrinology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow 226014, India.

Genes
|March 6, 2023
PubMed
Summary

Lipotoxicity, or lipid-induced liver injury, is exacerbated by saturated fatty acids in nonalcoholic fatty liver disease (NAFLD). Autophagy plays a key role in defending liver cells against this damage, offering therapeutic targets for NAFLD.

Keywords:
ER stressNAFLDNASHautophagylipotoxicityoxidative stress

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Area of Science:

  • Cell Biology
  • Hepatology
  • Metabolic Diseases

Background:

  • Lipotoxicity, characterized by lipid-induced cellular damage in non-fatty tissues, is a growing concern, particularly in nonalcoholic fatty liver disease (NAFLD).
  • Excess saturated fatty acids (SFAs) and their derivatives, such as ceramides, are implicated in causing oxidative stress and endoplasmic reticulum (ER) stress within hepatocytes.
  • Autophagy, a cellular degradation process, is crucial for maintaining cellular homeostasis by clearing damaged organelles and misfolded proteins.

Conclusions:

  • Autophagy is a vital defense mechanism against lipotoxicity in the liver, playing a protective role in NAFLD.
  • Understanding the modulation of autophagy in response to lipotoxic stimuli is key to developing effective NAFLD treatments.
  • Pharmacological and non-pharmacological interventions aimed at enhancing autophagy present a promising avenue for managing NAFLD.