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Desensitization and recovery of crayfish photoreceptors. Dependency on circadian time, and pigment-dispersing hormone.
Barriga-Montoya, Carolina; de la O-Martínez, Araceli; Fuentes-Pardo, Beatriz; Gómez-Lagunas, Froylán.
Afiliação
  • Barriga-Montoya C; Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Circuito Interior S/N, Ciudad Universitaria, 04510 Ciudad de México, Mexico.
  • de la O-Martínez A; Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Circuito Interior S/N, Ciudad Universitaria, 04510 Ciudad de México, Mexico.
  • Fuentes-Pardo B; Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Circuito Interior S/N, Ciudad Universitaria, 04510 Ciudad de México, Mexico.
  • Gómez-Lagunas F; Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México (UNAM), Circuito Interior S/N, Ciudad Universitaria, 04510 Ciudad de México, Mexico. Electronic address: froylangl@yahoo.com.
Article em En | MEDLINE | ID: mdl-27783925
In this work, we studied the characteristics of recovery from desensitization of the light-elicited current of crayfish. Applying a two-flash protocol, we found that the first flash triggers a current that activates with a noticeable latency, reaches a peak value, and thereafter decays along a single exponential time course. In comparison with the first-elicited current, the current elicited by the second flash not only presents an expected smaller peak current, depending on the time between flashes, but it also displays a different latency and decay time constant. Recovery of the first flash values of these current parameters depends on the circadian time at which the experiments are conducted, and on the presence of pigment-dispersing hormone. Our data also suggest the existence of distinctive desensitized states, whose induction depends on circadian time and the presence of pigment-dispersing hormone.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ritmo Circadiano / Células Fotorreceptoras de Invertebrados / Astacoidea / Hormônios de Invertebrado Limite: Animals Idioma: En Revista: Comp Biochem Physiol A Mol Integr Physiol Assunto da revista: BIOLOGIA MOLECULAR / FISIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ritmo Circadiano / Células Fotorreceptoras de Invertebrados / Astacoidea / Hormônios de Invertebrado Limite: Animals Idioma: En Revista: Comp Biochem Physiol A Mol Integr Physiol Assunto da revista: BIOLOGIA MOLECULAR / FISIOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: México País de publicação: Estados Unidos