Nadh Oxidative Phosphorylation
Nadh Oxidative Phosphorylation - Related Videos
11:10
Respirometric Oxidative Phosphorylation Assessment in Saponin-permeabilized Cardiac Fibers
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Cited by 32 •
2011
Saponin-permeabilized fiber preparation in conjunction with respirometric oxidative phosphorylation analysis provides integrative assessment of mitochondrial function. Mitochondrial respiration in physiological and pathological states can reflect various regulatory influences including mitochondrial interactions, morphology and biochemistry.
01:02
Phosphorylation
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2019
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins. During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
12:07
NADH Fluorescence Imaging of Isolated Biventricular Working Rabbit Hearts
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Cited by 24 •
2012
The objective is to monitor the mitochondrial redox state of isolated hearts within the context of physiologic preload and afterload pressures. A biventricular working rabbit heart model is presented. High spatiotemporal resolution fluorescence imaging of NADH is used to monitor the mitochondrial redox state of epicardial tissue.
01:15
Pyruvate Oxidation
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2019
After glycolysis, the charged pyruvate molecules enter the mitochondria via active transport and undergo three enzymatic reactions. These reactions ensure that pyruvate can enter the next metabolic pathway so that energy stored in the pyruvate molecules can be harnessed by the cells. First, the enzyme pyruvate dehydrogenase removes the carboxyl group from pyruvate and releases it as carbon dioxide. The stripped molecule is then oxidized and releases electrons, which are then picked up by NAD+...
12:03
Detection of Microregional Hypoxia in Mouse Cerebral Cortex by Two-photon Imaging of Endogenous NADH Fluorescence
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Cited by 11 •
2012
Here we describe a method to directly visualize microregional tissue hypoxia in the mouse cortex in vivo. It is based on concurrent two-photon imaging of nicotinamide adenine dinucleotide (NADH) and the cortical microcirculation. This method is useful for high resolution analysis of tissue oxygen supply.
FAQs
NADH transfers its reducing energy to respiratory Complex I, which initiates electron transport across the inner mitochondrial membrane. Electron movement through the respiratory chain is coupled to formation of a proton gradient, linking the chemical energy stored in NADH to the membrane-based mechanism that supports ATP production. This places Complex I at the entry point for NADH-derived energy.
The proton gradient provides the immediate driving force for ATP synthase, allowing this enzyme to generate ATP from the energy stored across the inner mitochondrial membrane. Oxygen is required at the end of electron transport as the terminal electron acceptor. Consequently, NADH oxidation, proton-gradient formation, ATP synthesis, and oxygen use function as connected parts of one respiratory process.
Cancer cells must balance mitochondrial respiration with glycolysis, biosynthesis, and redox control while supporting growth. NADH oxidative phosphorylation is therefore relevant not only as an ATP-producing pathway but also as part of that broader metabolic balance. Studying its activity can help determine how tumor cells maintain energy and redox-related functions during changing growth conditions or metabolic stress.
Disrupting the pathway can expose whether a tumor depends on NADH oxidation or oxidative phosphorylation to maintain its metabolism. The resulting response may clarify how mitochondrial respiration contributes to energy production, redox control, or adaptation to metabolic stress. In cancer research, this information can identify cancer-specific metabolic dependencies and support studies of therapeutic response.
Researchers can measure NADH oxidation and oxidative phosphorylation, or deliberately disrupt these processes, to examine their contribution to tumor metabolism. These approaches can be interpreted alongside cancer-cell requirements for mitochondrial respiration, glycolysis, biosynthesis, and redox control. The resulting comparisons help reveal whether a metabolic pathway is important for growth or for adaptation during metabolic stress.
Such studies can show how strongly cancer cells rely on mitochondrial respiration and whether that reliance changes when cells face metabolic stress. They may also distinguish pathway contributions to ATP generation from broader roles in metabolic balance and redox control. These findings provide context for evaluating cancer-specific metabolic dependencies and interpreting responses to interventions that affect cellular metabolism.