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Related Concept Videos

Translocation of Proteins into the Mitochondria01:19

Translocation of Proteins into the Mitochondria

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,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

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,...
Mitochondrial Membranes01:45

Mitochondrial Membranes

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,...
Mitochondria01:37

Mitochondria

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,...
Mitochondria01:37

Mitochondria

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,...
Mitochondrial Precursor Proteins01:39

Mitochondrial Precursor Proteins

Mitochondrial precursors are partially unfolded or loosely folded polypeptide chains. Newly synthesized precursors are inhibited from spontaneously folding into their native conformation by the cytosolic chaperones, heat shock proteins 70 (Hsp70), and mitochondrial import stimulation factors (MSFs). Precursors bound to MSFs are guided to the TOM70-TOM37 receptors, while precursors bound to Hsp70  chaperones are targetted to TOM20-TOM22 receptor complexes.
Most of the mitochondrial precursors...

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Mitochondrial Isolation from Skeletal Muscle
09:45

Mitochondrial Isolation from Skeletal Muscle

Published on: March 30, 2011

Mitochondria in postconditioning.

Kerstin Boengler1, Gerd Heusch, Rainer Schulz

  • 1Institut für Pathophysiologie, Universitätsklinikum Essen, Hufelandstrasse 55, Essen, Germany. Kerstin.boengler@uk-essen.de

Antioxidants & Redox Signaling
|June 29, 2010
PubMed
Summary
This summary is machine-generated.

Cardioprotective stimuli preserve mitochondrial function after ischemia/reperfusion injury. This review explores how mitochondria, ATP-dependent potassium channels, and reactive oxygen species contribute to cardioprotection and its loss in aged or diseased hearts.

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Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
09:27

Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue

Published on: March 23, 2015

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Last Updated: Jun 12, 2026

Mitochondrial Isolation from Skeletal Muscle
09:45

Mitochondrial Isolation from Skeletal Muscle

Published on: March 30, 2011

Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue
09:27

Isolation and Functional Analysis of Mitochondria from Cultured Cells and Mouse Tissue

Published on: March 23, 2015

Area of Science:

  • Cardiovascular Science
  • Mitochondrial Biology
  • Cellular Signaling

Background:

  • Cardioprotective stimuli like ischemic or pharmacological postconditioning activate signaling pathways.
  • These pathways converge on mitochondria, crucial for preserving function after ischemia/reperfusion.
  • Mitochondrial dysfunction is implicated in various heart diseases.

Purpose of the Study:

  • To review the role of mitochondria in cardioprotection induced by postconditioning.
  • To elucidate the involvement of ATP-dependent potassium channels, reactive oxygen species, and the mitochondrial permeability transition pore.
  • To discuss the impact of postconditioning on mitochondrial function and its impairment in diseased or aged myocardium.

Main Methods:

  • Literature review focusing on signal transduction pathways and mitochondrial function.
  • Analysis of studies investigating oxygen consumption and calcium retention capacity of mitochondria.
  • Examination of factors affecting cardioprotection efficacy in specific patient populations.

Main Results:

  • Postconditioning preserves mitochondrial function, including oxygen consumption and calcium retention capacity.
  • Mitochondria are central targets for cardioprotective signaling pathways.
  • Protection by postconditioning can be diminished in aged or diseased hearts.

Conclusions:

  • Mitochondria play a pivotal role in mediating cardioprotection via postconditioning.
  • Understanding mitochondrial mechanisms is key to developing therapies for myocardial protection.
  • Age and disease compromise the effectiveness of postconditioning, highlighting the need for targeted interventions.