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- W2084761204 abstract "Pineal influence in the control of adrenomedullary function in golden hamsters was investigated by examining changes in adrenal dopamine-beta-hydroxylase (DBH) activity following pinealectomy, either alone or in combination with melatonin administration. Adult males acclimated to an LD 14:10 photoperiod were distributed in five experimental groups: intact controls (NO), sham-pinealectomized (S), sham-pinealectomized with black plastic shielding of the pineal region, pinealectomized (PX), and pinealectomized with the operated region shielded. Animals representing all of these groups were injected (between L11 and L11.75) with either vehicle, or a low dose (25 micrograms) or a high dose (2,500 micrograms) of melatonin daily for 28 days, after which they were killed, and the adrenals were collected for assay of DBH activity by means of a sensitive radioenzymatic method. We found that PX + vehicle led to increased (P less than .05) adrenal DBH activity in comparison with either NO or S groups; daily 25 micrograms of melatonin resulted in lowered DBH activity in the NO group when compared with NO + vehicle (P less than .001) or S + vehicle (P less than .001) groups; PX + 25 micrograms melatonin reversed the action of 25 micrograms melatonin in the NO + 25 micrograms group; 2,500 micrograms melatonin was without effect on adrenal DBH in any of the injected surgical groups. These results show an inhibitory pineal influence on adrenal DBH activity, and that this was dose dependent.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2084761204 date "1986-10-01" @default.
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- W2084761204 title "Effects of Melatonin on Adrenomedullary Dopamine-?-Hydroxylase Activity in Golden Hamsters: Evidence for Pineal and Dose Dependencies" @default.
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- W2084761204 doi "https://doi.org/10.1111/j.1600-079x.1986.tb00762.x" @default.
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