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Related Concept Videos

Mitochondrial Membranes01:45

Mitochondrial Membranes

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A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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Mitochondria01:37

Mitochondria

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Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
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The Inner Mitochondrial Membrane01:28

The Inner Mitochondrial Membrane

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The inner mitochondrial membrane is the primary site of ATP synthesis. The inner membrane domain that forms a smooth layer adjacent to the outer membrane is called the inner boundary membrane. This domain contains membrane transporters that drive metabolites in and out of the mitochondria.  In contrast, the inner membrane network that invaginates into the matrix space is called the cristae membrane. This domain accounts for principle mitochondrial function as it accommodates the protein...
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ATP Synthase: Mechanism01:48

ATP Synthase: Mechanism

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In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased...
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Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
Sorting of outer membrane proteins:
Mitochondrial outer membrane proteins are of two types: the transmembrane, beta-barrel porins, and the membrane-anchored, alpha-helical proteins. Beta-barrel porin precursors are translocated by the TOM complex and inserted into the outer mitochondrial membrane by the SAM complex. In contrast,...
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Updated: Jul 17, 2025

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle
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Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

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Mitochondrial dysfunction in the pathogenesis of endothelial dysfunction.

Suresh Kumar Prajapat1, Krushna Ch Maharana1, Sanjiv Singh2

  • 1National Institute of Pharmaceutical Education and Research, Export Promotion Industrial Park (EPIP) Zandaha Road, Hajipur, Bihar, India.

Molecular and Cellular Biochemistry
|August 29, 2023
PubMed
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Mitochondrial dysfunction contributes to cardiovascular diseases (CVDs) and endothelial dysfunction. Understanding these mechanisms can lead to new biomarkers and treatments for CVDs.

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Area of Science:

  • Biochemistry
  • Cardiology
  • Cell Biology

Background:

  • Cardiovascular diseases (CVDs) are a global health concern, with mitochondrial dysfunction as a key contributor.
  • Endothelial dysfunction, characterized by abnormal signaling and inflammation, plays a crucial role in atherosclerosis development.
  • Mitochondria generate ATP and produce reactive oxygen species (ROS), impacting cellular function and vascular health.

Purpose of the Study:

  • To elucidate the role of mitochondrial mechanisms in modulating endothelial dysfunction.
  • To explore mitochondrial dysfunction as a potential biomarker for CVD risk assessment and diagnosis.
  • To review therapeutic strategies targeting mitochondrial dysfunction for endothelial dysfunction.

Main Methods:

  • Review of current literature on mitochondrial dysfunction and endothelial dysfunction.
  • Analysis of molecular mechanisms linking mitochondrial dynamics to endothelial cell function.
  • Examination of diagnostic approaches and therapeutic interventions.

Main Results:

  • Increased mitochondrial ROS generation and altered mitochondrial dynamics are linked to endothelial dysfunction and CVDs.
  • Mitochondrial dysfunction affects nitric oxide bioavailability and endothelial cell signaling.
  • Several therapeutic targets and drug classes show potential for mitigating mitochondrial dysfunction.

Conclusions:

  • Mitochondrial dysfunction is a significant factor in endothelial dysfunction and cardiovascular diseases.
  • Identifying mitochondrial dysfunction biomarkers could improve CVD risk assessment.
  • Targeting mitochondrial pathways offers promising therapeutic avenues for treating endothelial dysfunction.