title: Intracellular localization of a long alkyl chain tetraphenylporphyrin and chloride channel activation in Psammobatis extenta electrocytes.
abstract: The intracellular localization of a tetraphenylporphyrin bearing four long lipophilic alkyl chains in electrocytes from Psammobatis extenta(Rajidae) is described. In contrast to what is usually the case, this porphyrin derivative is localized in the electromotor nerves and the nuclear chromatin of the electrocytes. Both structures exhibited intense fluorescence, whereas, the mitochondria were only slightly fluorescent. These data are discussed in relation to electrocyte death in a weakly electric fish. Additionally, electron probe X-ray microanalysis suggests a migration of chloride and cationic ions, which might be implicated in chloride and cationic channel activation in the electrocyte.
authors.affiliation: Instituto Peruano de Energia Nuclear, Av. Canada 1470, Lima 41, Peru.
authors.forename: Maria
authors.initials: M
authors.lastname: Prado Figueroa
authors.forename: Julio
authors.initials: J
authors.lastname: Santiago
mesh_terms: D000818:Animals; D018118:Chloride Channels / Q000502:physiology* / Q000648:ultrastructure; D002843:Chromatin / Q000502:physiology; D004573:Electrolytes / Q000032:analysis*; D007473:Ion Channels / Q000502:physiology* / Q000648:ultrastructure; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D009046:Motor Neurons / Q000502:physiology*; D011166:Porphyrins / Q000737:chemistry*; D012860:Skates, Fish
chemical_list: D018118:Chloride Channels; D002843:Chromatin; D004573:Electrolytes; D007473:Ion Channels; D011166:Porphyrins; C409084:tetraphenylporphyrin