Related Experiment Video
Updated: Jul 16, 2026
10:25
Isolation of Intact Mitochondria from Skeletal Muscle by Differential Centrifugation for High-resolution Respirometry Measurements
Published on: March 8, 2017
[Mitochondria in anaesthesia and intensive care]
K Nouette-Gaulain1, A Quinart, T Letellier
1Département d'anesthésie-réanimation I, CHU Pellegrin, 33076 Bordeaux cedex, France.
Annales Francaises D'Anesthesie Et De Reanimation
|March 14, 2007
Summary
Mitochondria are key cellular energy producers and targets for anesthetics. Understanding their role in critical conditions like sepsis and hypoxia may lead to new treatments.
Area of Science:
- Mitochondria's central role in cellular energy metabolism via oxidative phosphorylation.
- Involvement in crucial cellular processes including apoptosis, calcium signaling, and reactive oxygen species generation.
Context:
- Mitochondrial metabolism is significantly impacted by anesthetic agents and critical care scenarios such as sepsis, ischemia, and hypoxia.
- Anesthetics can act as pharmacological targets, leading to both toxic effects (e.g., local anesthetic-induced myotoxicity) and beneficial outcomes (e.g., anesthetic-induced myocardial preconditioning).
Purpose:
- To elucidate the complex interactions between mitochondrial metabolism and anesthetics.
- To investigate the effects of critical care stressors (sepsis, ischemia, hypoxia) on mitochondrial function.
- To explore the clinical implications of these mitochondrial interactions.
Summary:
- Mitochondria serve as pharmacological targets for anesthetics, with effects ranging from toxicity to beneficial preconditioning.
- Mitochondrial metabolism is frequently disrupted in critical conditions like sepsis, chronic hypoxia, and ischemia-reperfusion injury.
- Understanding these mechanisms is crucial for developing targeted future therapeutics.
Impact:
- Provides insights into the dual role of anesthetics on mitochondrial function.
- Highlights the vulnerability of mitochondrial metabolism in critical illness.
- Lays the groundwork for novel therapeutic strategies targeting mitochondrial pathways in intensive care settings.
Related Concept Videos
01:46Electron 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...
ROS generation is regulated and maintained at moderate levels necessary...
01:37Mitochondria
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,...
01:30Peroxisomes
Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within peroxisomes...
01:28The Inner Mitochondrial Membrane
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...
01:45Mitochondrial 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,...
01:19Translocation 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,...
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,...