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- W2005011410 abstract "— A modification of a specific and sensitive radioassay was used to measure dopamine-β-hydroxylase (DBH) (EC 1.14.2.1) in various regions of the rat CNS. Highest activity was found in the hypothalamus. Relative to activity in the hypothalamus (= 100 per cent), activity in brainstem was 80 per cent, in sensory motor cortex 55 per cent, in caudate nucleus 32 per cent, and in cervical spinal cord 30 per cent. Two to three weeks after a unilateral electrolytic lesion of the lateral hypothalamus, activity of DBH in the ipsilateral cerebral cortex fell to 17 per cent of control values without changes in activity ipsi- or contra-laterally in the brainstem. Thalamic lesions did not affect DBH activity. In cerebral cortex contralateral to the hypothalamic lesion, enzymic activity rose 30 per cent. After intracisternal administration of 6-hydroxy-dopamine (6-OH-DA), cortical DBH activity fell to 20 per cent of control values. Reserpine (3 mg/kg subcutaneously for 3 days) did not increase the activity of DBH in brain regions but did increase the activity of DBH in adrenal gland 200 per cent. Our results suggest that: (a) DBH is widely distributed in neurons in CNS with a regional pattern of activities that appears to parallel the Jevels of norepinephrine; (b) DBH activity in the cerebral cortex depends on the integrity of structures (e.g. medial forebrain bundle) in lateral hypothalamus; (c) DBH in brain areas lacking cell bodies of nore- pinephrine-neurons (e.g. cerebral cortex) is contained in norepinephrine-containing axon terminals and (d) the activity of DBH in brain is not increased by reserpine under conditions that provoke marked increase of DBH activity in the adrenal gland." @default.
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- W2005011410 date "1972-01-01" @default.
- W2005011410 modified "2023-09-24" @default.
- W2005011410 title "BRAIN DOPAMINE-?-HYDROXYLASE: REGIONAL DISTRIBUTION AND EFFECTS OF LESIONS AND 6-HYDROXY-DOPAMINE ON ACTIVITY" @default.
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- W2005011410 doi "https://doi.org/10.1111/j.1471-4159.1972.tb01269.x" @default.
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