Related Experiment Video

Updated: Jun 29, 2026

Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy
07:47

Analysis of Brain Mitochondria Using Serial Block-Face Scanning Electron Microscopy

Published on: July 9, 2016

Preconditioning: the mitochondrial connection

Elizabeth Murphy1, Charles Steenbergen

  • 1National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA. murphy1@niehs.nih.gov

Annual Review of Physiology
|September 30, 2006
PubMed

Insights

Cardioprotection research reveals signaling pathways converge on mitochondria. Inhibiting the mitochondrial permeability transition pore is key to reducing heart cell death and improving survival.

Area of Science:

  • Cardiovascular Research
  • Mitochondrial Biology
  • Cell Death Pathways

Background:

  • Significant advancements in understanding cardioprotection signaling pathways over the last decade.
  • Emerging evidence indicates convergence of these pathways on mitochondria.
  • Mitochondria play a crucial role in regulating apoptosis and necrosis.

Purpose of the Study:

  • To review the mechanisms of cardioprotection focusing on mitochondrial alterations.
  • To elucidate how signaling pathways impact mitochondrial proteins and channels.
  • To highlight the role of the mitochondrial permeability transition pore in cardioprotection.

Main Methods:

  • Literature review of recent studies on cardioprotection signaling.
  • Analysis of data linking signaling pathways to mitochondrial function.
  • Focus on mechanisms affecting mitochondrial proteins and cell death regulation.

Main Results:

  • Cardioprotective signaling pathways frequently converge on mitochondria.
  • Alterations in key mitochondrial proteins are induced by these pathways.
  • Inhibition of the mitochondrial permeability transition pore is a central cardioprotective mechanism.

Conclusions:

  • Mitochondrial protein modulation is a critical aspect of cardioprotection.
  • Targeting the mitochondrial permeability transition pore offers therapeutic potential.
  • Understanding these pathways enhances strategies for preventing heart cell death.

More Related Videos

Exploring Mitochondrial Energy Metabolism of Single 3D Microtissue Spheroids Using Extracellular Flux Analysis08:15

Exploring Mitochondrial Energy Metabolism of Single 3D Microtissue Spheroids Using Extracellular Flux Analysis

Published on: February 3, 2022

Robust Mitochondrial Isolation from Rodent Cardiac Tissue07:03

Robust Mitochondrial Isolation from Rodent Cardiac Tissue

Published on: August 23, 2024

Related Concept Videos

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,...
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

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...
Mitochondrial Protein Sorting01:39

Mitochondrial Protein Sorting

Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
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...
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,...
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,...