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Intracellular localization of a long alkyl chain tetraphenylporphyrin and chloride channel activation in Psammobatis extenta electrocytes

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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.

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Authors and Affiliations

  1. Instituto de Investigaciones Bioquímicas, Universidad Nacional del Sur C.C. 857, B-8000FWB, Bahía Blanca, Argentina

    María Prado Figueroa

  2. Instituto Peruano de Energía Nuclear, Av. Canadá 1470, Lima 41, Perú

    Julio Santiago

Authors
  1. María Prado Figueroa
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  2. Julio Santiago
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Correspondence to Julio Santiago.

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Prado Figueroa, M., Santiago, J. Intracellular localization of a long alkyl chain tetraphenylporphyrin and chloride channel activation in Psammobatis extenta electrocytes. Photochem Photobiol Sci 3, 33–35 (2004). https://doi.org/10.1039/b305411j

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  • DOI: https://doi.org/10.1039/b305411j

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