Seasonal variations in the effect of prolactin on the short-circuit current across bullfrog skin.
The effect of serosal application of ovine prolactin (PRL) on the short-circuit current (SCC) across the abdominal skin of larval or adult Rana catesbeiana was compared between two seasons, spring-summer and autumn-winter. Prolactin induced a transient increase in SCC in Cl-Ringer's solution, to a greater extent in spring-summer than in autumn-winter. The skin of stage XXV frogs was more sensitive to PRL than the skin of adult frogs. On the other hand, PRL had no effect on SCC in SO4-Ringer's solution either in summer or in autumn.
Takada
M
M
Department of Physiology, Saitama Medical School, Japan.
D000818:Animals; D004594:Electrophysiology; D011388:Prolactin / Q000494:pharmacology*; D011892:Rana catesbeiana / Q000502:physiology*; D012621:Seasons; D012867:Skin / Q000187:drug effects*
D011388:Prolactin