title: Concomitant development of [3H]-dopamine and [3H]-5-hydroxytryptamine uptake systems in rat brain regions.
abstract: 1 Synaptosomal uptake mechanisms of 5-hydroxytryptamine and dopamine were examined in cerebral cortex, corpus striatum and midbrain plus brainstem of developing rats. 2 In all regions, there was generally a parallel biphasic development of both uptake systems; the most rapid increases occurred in the first two weeks postpartum, followed by a slower rate of increase. 3 Kinetic studies with dopamine indicated that the maturation involved increases in maximal uptake without a change in the substrate Km, suggesting that there is a change in the number or terminals but not in the uptake system per se.
mesh_terms: D000375:Aging; D000818:Animals; D001921:Brain / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D005260:Female; D066298:In Vitro Techniques; D007700:Kinetics; D011247:Pregnancy; D051381:Rats; D012701:Serotonin / Q000378:metabolism*; D013574:Synaptosomes / Q000378:metabolism
chemical_list: D012701:Serotonin; D004298:Dopamine