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- W2079634519 abstract "During development norepinephrine plays a role in determining the morphologic organization of the CNS and the density and future responsiveness of adrenergic receptors. α-2 Adrenergic receptors, one of three adrenergic receptor types, regulate important adult CNS functions and may have a distinct role during development. We examined α-2 receptor distribution and density in the rat brain at postnatal days 1, 5, 10, 15, 21, 28 and in adults using the antagonist [3H]RX821002 for autoradiography. Binding kinetics and pharmacology for α-2 adrenergic receptors were the same in adults and neonates. There was an overall increase in α-2 receptor levels during postnatal development with great variability in pattern and timing of receptor density changes among brain regions. Three major patterns were apparent. First, in many regions receptor density increased during postnatal development, generally reaching adult levels around postnatal day 15. Within this group there was variability in timing between regions and there were several regions with receptor densities higher than adult levels during the postnatal period. Second, there were regions with very high levels of receptors at birth and little or no change in density during the postnatal period. Third, some regions demonstrated decreasing or transient expression of α-2 adrenergic receptors in the course of postnatal development, including white matter regions, cerebellum and many brainstem nuclei, suggesting specific roles for α-2 receptors during development. This study investigates the development of α-2 adrenergic receptors in the rat CNS. It demonstrates there is region-specific regulation of α-2 receptor development and identifies brain regions where these receptors may play a specific and critical role in the regulation normal development." @default.
- W2079634519 created "2016-06-24" @default.
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- W2079634519 date "2004-01-01" @default.
- W2079634519 modified "2023-10-15" @default.
- W2079634519 title "Alpha-2 adrenergic receptor development in rat CNS: an autoradiographic study" @default.
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- W2079634519 doi "https://doi.org/10.1016/j.neuroscience.2003.09.004" @default.
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