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Autoradiographic studies using L-[(14)C]DOPA and L-DOPA reveal regional Na(+)-dependent uptake of the neurotransmitter candidate L-DOPA in the CNS.
Neuroscience
July 2001
Department of Pharmacology, Yokohama City University School of Medicine, 236-0004, Yokohama, Japan.
We previously proposed that L-3,4-dihydroxyphenylalanine (L-DOPA) is a neurotransmitter in the CNS. Receptor and transporter molecules for L-DOPA, however, have not been determined. In the present study, in order to localize the uptake sites of L-DOPA in the CNS, we performed autoradiographic uptake studies using L-[14C]DOPA and L-[3H]DOPA in the uptake study on rat brain slice preparations, and further analyzed the properties of L-DOPA uptake.
View Article and Find Full Text PDFThe penetration and distribution in various areas of cat brain of 14C-DL-DOPA and/or its derivatives was studied by the autoradiographic technique. The highest activity was found, 1 hr after administration, in the caudate nucleus, putamen and n. accumbens, while hypothalamus, substantia nigra, substantia grisea pericentralis, tuberculum olfactorium, raphe nuclei and nucleus interpeduncolaris showed lower levels of labelling.
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