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Fig. 8. The effect of the D1-selective agonists SKF81297 and dihydrexidine on the
albumen gland glycoprotein secretion. (A) The partial D1 agonist SKF81297 (50
µmol l-1) induced a modest but statistically significant
increase in glycoprotein secretion compared with control (CON) glands in
saline. However, it was less than half the potency of dopamine (DA) at 50
µmol l-1 concentration. Bars represent the mean ±
S.E.M. of 16–18 samples (*P<0.05;
*P<0.001, Tukey test). (B) Dihydrexidine (DH) caused a
dose-dependent increase in albumen gland glycoprotein secretion between 1 and
100 µmol l-1. Note that the shape and magnitude of the
dose–response curve for dihydrexidine are similar to those of dopamine.
Each point represents the mean ± S.E.M. of 18 samples
(*P<0.05; *P<0.001, Tukey
test).
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