Similar to the effect of T3, the tail absorption of frog larvae (Rana arvalis) was stimulated in vitro by the sympathomimetic agents adrenaline, isoproterenol, ephedrine and the adrenaline analogue MMT. The effect of T3 administration was not inhibited by adrenaline, isoproterenol and MMT, but it was by ephedrine and T3 pretreatment. The adrenaline and isoproterenol effect manifested itself after early administration, but not after late, and while ephedrine and MMT were effective at long term administration, even if administered at a later time. Our experiments draw attention to the metamorphic effect of substances capable of binding to β-receptors. Their effect may be explained partly by the increase in the cAMP level, partly by a relationship existing between the β-receptor and the T3 receptor.
|Number of pages||7|
|Journal||Acta Biologica Academiae Scientiarum Hungaricae|
|Publication status||Published - 1981|
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)