Steroids modulate the excitability of crayfish (Procambarus digueti) photoreceptors: Long- and short-term actions
Por:
Hernández-Falcón J., Schneider-Ehrenberg O., De La O Martínez A., Campos-Lozada V., Fuentes-Pardo B.
Publicada:
1 ene 1997
Resumen:
Short- and long-term actions of the steroids corticosterone, progesterone, and ecdysterone were analyzed upon excitability of crayfish retinular cells. The three hormones showed short-term actions, particularly during photoreceptor dark adaptation; effects were found to be dependent on the hour of the day. Corticosterone and progesterone had similar effects, i.e., resembled dark-adapted conditions; ecdysterone actions were opposite and resembled light adaptation. Long-term effects were opposed to short- term effects in all cases. Possible mechanisms underlying these effects are discussed.
Filiaciones:
Hernández-Falcón J.:
Departarmnto de Fisiología, Facultad de Medicina, U.N.A.M., A. Postal 70-250, 04510 México, D.F., Mexico
Schneider-Ehrenberg O.:
Departarmnto de Fisiología, Facultad de Medicina, U.N.A.M., A. Postal 70-250, 04510 México, D.F., Mexico
De La O Martínez A.:
Departarmnto de Fisiología, Facultad de Medicina, U.N.A.M., A. Postal 70-250, 04510 México, D.F., Mexico
Campos-Lozada V.:
Departarmnto de Fisiología, Facultad de Medicina, U.N.A.M., A. Postal 70-250, 04510 México, D.F., Mexico
Fuentes-Pardo B.:
Departarmnto de Fisiología, Facultad de Medicina, U.N.A.M., A. Postal 70-250, 04510 México, D.F., Mexico
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