Respiratory Chain Activity
Respiratory Chain Activity - Related Videos
09:37
Evaluation of Respiratory Muscle Activation Using Respiratory Motor Control Assessment (RMCA) in Individuals with Chronic Spinal Cord Injury
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Cited by 18 •
2013
The purpose of this publication is to present our original work on a multi-muscle surface electromyographic approach to quantitatively characterize respiratory muscle activation patterns in individuals with chronic spinal cord injury using vector-based analysis.
03:10
Blue Native Polyacrylamide Gel Electrophoresis: A Non-Denaturing Separation Technique for Analysis of Intact Mitochondrial Respiratory Chain Complexes
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2025
In this video, we demonstrate an electrophoretic technique, called blue native PAGE, for the analysis of mitochondrial respiratory protein complexes in their natively folded and functionally active state. The anionic Coomassie blue dye causes the protein complexes to become negatively charged, allowing separation based on size and structure.
09:24
Repeated Measurement of Respiratory Muscle Activity and Ventilation in Mouse Models of Neuromuscular Disease
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Cited by 11 •
2017
This paper introduces a method for repeated measurements of ventilation and respiratory muscle activity in a freely behaving amyotrophic lateral sclerosis (ALS) mouse model throughout disease progression with whole-body plethysmography and electromyography via an implanted telemetry device.
07:36
Contact-Free Co-Culture Model for the Study of Innate Immune Cell Activation During Respiratory Virus Infection
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Cited by 1 •
2021
This protocol details an investigation of the early interactions between virally infected nasal epithelial cells and innate cell activation. Individual subsets of immune cells can be distinguished based on their activation in response to viral infections. They can then be further investigated to determine their effects on early antiviral responses.
01:28
Electron Transport Chains
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2019
The final stage of cellular respiration is oxidative phosphorylation that consists of two steps: the electron transport chain and chemiosmosis. The electron transport chain is a set of proteins found in the inner mitochondrial membrane in eukaryotic cells. Its primary function is to establish a proton gradient that can be used during chemiosmosis to produce ATP and generate electron carriers, such as NAD+ and FAD, that are used in glycolysis and the citric acid cycle. The ETC is comprised of...
FAQs
Electron transfer is organized across protein complexes embedded in the inner mitochondrial membrane. As electrons move between these complexes toward molecular oxygen, selected steps pump protons across the membrane. The resulting separation of charge and concentration stores usable electrochemical energy, linking redox reactions to ATP synthase activity rather than allowing electron flow to produce ATP independently.
The proton gradient provides the immediate energetic connection between respiratory chain activity and ATP production. ATP synthase uses the electrochemical difference across the inner mitochondrial membrane to drive ATP formation. Consequently, electron transfer and proton pumping must remain functionally coupled so that energy from reducing equivalents can effectively support cellular ATP production.
Molecular oxygen provides the endpoint for electron transfer through the respiratory chain. Its position at the end of this pathway connects oxygen use with continued electron movement through the mitochondrial protein complexes. This makes oxygen-dependent electron flow relevant when interpreting whether mitochondrial energy conversion is operating effectively in immune cells or during infection-related stress.
Respiratory chain activity measurements can indicate how immune-cell metabolism changes during activation, inflammation, or pathogen exposure. They may reveal altered bioenergetic demands, mitochondrial dysfunction, or effects of infectious agents on host-cell energy production. These findings help connect immune responses with changes in the cellular systems that supply energy for ongoing activity.
Comparing these cellular states helps determine whether immune activation or inflammation is associated with changed mitochondrial energy use. Differences in respiratory chain activity can reflect altered bioenergetic demands rather than simply the presence of immune cells. Such comparisons provide context for evaluating how cellular energy production changes as immune responses develop.
In pathogen-exposure studies, respiratory chain analysis can assess whether infectious agents affect host-cell mitochondrial energy production. Researchers can relate observed changes to immune-cell activation, inflammation, or mitochondrial dysfunction. The resulting bioenergetic profile provides a cellular measure of infection-associated metabolic effects and helps distinguish altered energy production from broader changes in immune status.