Warning: Undefined variable $zfal in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 525
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 530
 free
Warning: Undefined variable $sterm in C:\Inetpub\vhosts\kidney.de\httpdocs\mlpefetch.php on line 531
 free
 free
 
English Wikipedia
Nephropedia Template TP (
Twit Text
DeepDyve
Pubget Overpricing |  
lüll
The role of redox changes in oxygen sensing Weir EK; Archer SLRespir Physiol Neurobiol 2010[Dec]; 174 (3): 182-91The specialized oxygen-sensing tissues include the carotid body and arterial smooth muscle cells in the pulmonary artery (PA) and ductus arteriosus (DA). We discuss the evidence that changes in oxygen tension are sensed through changes in redox status. "Redox" changes imply the giving or accepting of electrons. This might occur through the direct tunneling of electrons from mitochondria or redox couples to an effector protein (e.g. ion channel). Alternatively, the electron might be transferred through reactive oxygen species from mitochondria or an NADPH oxidase isoform. The PA's response to hypoxia and DA's response to normoxia result from reduction or oxidation, respectively. These opposing redox stimuli lead to K+ channel inhibition, membrane depolarization and an increase in cytosolic calcium and/or calcium sensitization that causes contraction. In the neuroendocrine cells (the type 1 cell of the carotid body, neuroepithelial body and adrenomedullary cells), the response is secretion. We examine the roles played by superoxide anion, hydrogen peroxide and the anti-oxidant enzymes in the signaling of oxygen tensions.|*Oxidation-Reduction[MESH]|Animals[MESH]|Carotid Body/cytology/metabolism[MESH]|Heart Failure/pathology/physiopathology[MESH]|Humans[MESH]|Hydrogen Peroxide/metabolism[MESH]|Hypoxia/metabolism/pathology/physiopathology[MESH]|Models, Biological[MESH]|Myocytes, Smooth Muscle/*metabolism[MESH]|NADPH Oxidases/metabolism[MESH]|Oxygen/*metabolism[MESH]|Pulmonary Artery/cytology[MESH]|Reactive Oxygen Species/metabolism[MESH]|Vasoconstriction/physiology[MESH] |
