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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,...
Cellular Adaptation I: Introduction and Atrophy01:23

Cellular Adaptation I: Introduction and Atrophy

Cells can adapt to environmental changes to maintain function and avoid injury, a process called cellular adaptation. Adapted cells exist in a reversible intermediate state with changes in size, number, phenotype, metabolism, or function. These responses help cells meet altered physiological or pathological demands; for example, enlargement of breast and uterine tissues during pregnancy. Early adaptations may enhance function, but persistent stress eventually causes tissue damage.Types of...
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...
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...
Cellular Adaptation II: Hypertrophy01:26

Cellular Adaptation II: Hypertrophy

Hypertrophy is the increase in the size of individual cells, resulting in the enlargement of a tissue or organ. Unlike hyperplasia, which involves an increase in cell number, hypertrophy is characterized by an increase in cell volume. This process often occurs in response to higher functional demand or hormonal stimulation, leading to the production of more structural proteins and organelles, thereby enhancing the cells' work capacity.There are two primary types of hypertrophy: physiological...

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Updated: May 20, 2026

Visualizing Mitophagy with Fluorescent Dyes for Mitochondria and Lysosome
07:56

Visualizing Mitophagy with Fluorescent Dyes for Mitochondria and Lysosome

Published on: November 30, 2022

Mitophagy: a process that adapts to the cell physiology.

Ingrid Bhatia-Kiššová1, Nadine Camougrand

  • 1Comenius University, Faculty of Natural Sciences, Department of Biochemistry, Mlynská dolina CH1, 84215 Bratislava, Slovak Republic.

The International Journal of Biochemistry & Cell Biology
|July 18, 2012
PubMed
Summary

Mitophagy is a complex cellular process for removing mitochondria, not just damaged ones, to regulate cell energy. This process varies between yeast and mammalian cells, highlighting its link to cell physiology.

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Last Updated: May 20, 2026

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Area of Science:

  • Cellular Biology
  • Mitochondrial Dynamics
  • Autophagy

Background:

  • Mitophagy is a selective form of autophagy responsible for clearing mitochondria.
  • Understanding mitophagy is crucial for comprehending cellular adaptation and bioenergetic homeostasis.
  • Previous studies have identified key players and pathways involved in mitophagy.

Purpose of the Study:

  • To elucidate the complex regulatory mechanisms of mitophagy.
  • To highlight discrepancies in mitophagy regulation between different eukaryotic models (yeast and mammalian cells).
  • To emphasize mitophagy as a dynamic process influenced by cell physiology and energy demands.

Main Methods:

  • Comparative analysis of mitophagy in yeast and mammalian cells.
  • Review of existing literature on mitophagy regulation.
  • Integration of data on mitophagy's role in cellular energy balance.

Main Results:

  • Mitophagy is a complex, non-linear process involving the removal of both damaged and healthy mitochondria.
  • Significant discrepancies exist in mitophagy regulation between yeast and mammalian cells.
  • Mitophagy's activity is tightly coupled to cellular energy requirements and overall cell physiology.

Conclusions:

  • Mitophagy is a sophisticated cellular mechanism essential for maintaining mitochondrial quality and quantity.
  • The differential regulation of mitophagy across species underscores its adaptability.
  • Further research into mitophagy is vital for understanding and potentially targeting bioenergetic dysfunction and related therapies.