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Purine metabolites: Nucleotides (e.g., ATP) and nucleosides (e.g., adenosine) that have reached the extracellular space can also serve as danger signals by signaling through purinergic receptors. [30] ATP and adenosine are released in high concentrations after catastrophic disruption of the cell, as occurs in necrotic cell death. [31]
Adenosine triphosphate (ATP) is a nucleoside triphosphate [2] that provides energy to drive and support many processes in living cells, such as muscle contraction, ...
Mitochondrial disease is a group of disorders caused by mitochondrial dysfunction. Mitochondria are the organelles that generate energy for the cell and are found in every cell of the human body except red blood cells. They convert the energy of food molecules into the ATP that powers most cell functions.
ATP (adenosine triphosphate) depletion is a common biological alteration that occurs with cellular injury. This change can happen despite the inciting agent of the cell damage. A reduction in intracellular ATP can have a number of functional and morphologic consequences during cell injury. These effects include: Failure of the ATP-dependent ...
Some people with a metabolic myopathy never develop symptoms due to the body's ability to produce enough ATP through alternative pathways (e.g. the majority of those with AMP-deaminase deficiency are asymptomatic [1] [21]). H 2 O + ATP → H + + ADP + P i + energy → muscle contraction [22] ATP is needed for muscle contraction by two processes:
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Mitochondrial myopathy literally means mitochondrial muscle disease, muscle disease caused by mitochondrial dysfunction. The mitochondrion is the primary producer of energy in nearly all cells throughout the body. The exception is mature erythrocytes (red blood cells), so that they do not use up the oxygen that they carry.
In the peripheral nervous system, Schwann cells respond to nerve stimulation and modulate the release of neurotransmitters through mechanisms involving ATP and adenosine signalling. [37] In the retina and the olfactory bulb, ATP is released by neurons to evoke transient calcium signals in several glial cells such as Muller glia and astrocytes ...