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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.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
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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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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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Translocation of Proteins into the Mitochondria01:19

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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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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Cardiomyopathy V: Interprofessional Care01:29

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Managing cardiomyopathy involves addressing underlying or precipitating causes, treating heart failure with medications, and implementing dietary changes and a balanced exercise and rest regimen.Lifestyle ModificationsCardiomyopathy patients should adopt a low-sodium diet to reduce fluid retention and manage heart failure. A personalized exercise and rest plan helps maintain physical fitness without overstraining the heart. Avoiding alcohol and tobacco is essential to prevent further damage to...
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Updated: Jul 14, 2025

Protection of H9c2 Myocardial Cells from Oxidative Stress by Crocetin via PINK1/Parkin Pathway-Mediated Mitophagy
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Mitophagy for cardioprotection.

Allen Sam Titus1, Eun-Ah Sung1, Daniela Zablocki1

  • 1Department of Cell Biology and Molecular Medicine, Cardiovascular Research Institute, Rutgers New Jersey Medical School, 185 South Orange Ave, MSB G-609, Newark, NJ, 07103, USA.

Basic Research in Cardiology
|October 5, 2023
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Summary

Mitophagy, the process of degrading damaged mitochondria, is vital for heart health. Insufficient mitophagy in cardiomyocytes leads to mitochondrial dysfunction and heart failure.

Keywords:
Alternative mitophagyDrp1Mitochondrial quality controlMitophagy

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Area of Science:

  • Cardiology
  • Cell Biology
  • Biochemistry

Background:

  • Mitochondria are crucial for energy production in cardiomyocytes.
  • Adult cardiomyocytes rarely divide, necessitating efficient removal of damaged mitochondria.
  • Mitophagy is a key mitochondrial quality control mechanism essential for cardiac function.

Approach:

  • This review discusses the molecular mechanisms of mitophagy in the heart.
  • It examines the role of mitophagy in cardiac pathophysiology.
  • Recent findings in the field are highlighted.

Key Points:

  • Mitophagy, a selective form of autophagy, eliminates damaged or superfluous mitochondria.
  • It is constitutively active in cardiomyocytes and crucial for maintaining mitochondrial quality.
  • Multiple mitophagy pathways exist in the heart, offering partial redundancy.

Conclusions:

  • Impaired mitophagy leads to mitochondrial dysfunction and contributes to heart failure development.
  • Understanding mitophagy mechanisms is critical for addressing cardiac pathophysiology.
  • This review provides insights into the latest research on cardiac mitophagy.