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- W38478502 abstract "Dopamine is a catecholaminergic neuromodulatory transmitter that acts through five molecularly-distinct G protein-coupled receptor subtypes (D(1)-D(5)). In the mammalian spinal cord, dopaminergic axon collaterals arise predominantly from the A11 region of the dorsoposterior hypothalamus and project diffusely throughout the spinal neuraxis. Dopaminergic modulatory actions are implicated in sensory, motor and autonomic functions in the spinal cord but the expression properties of the different dopamine receptors in the spinal cord remain incomplete. Here we determined the presence and the regional distribution of all dopamine receptor subtypes in mouse spinal cord cells by means of quantitative real time polymerase chain reaction (PCR) and digoxigenin-label in situ hybridization. Real-time PCR demonstrated that all dopamine receptors are expressed in the spinal cord with strongly dominant D(2) receptor expression, including in motoneurons and in the sensory encoding superficial dorsal horn (SDH). Laser capture microdissection (LCM) corroborated the predominance of D(2) receptor expression in SDH and motoneurons. In situ hybridization of lumbar cord revealed that expression for all dopamine receptors was largely in the gray matter, including motoneurons, and distributed diffusely in labeled cell subpopulations in most or all laminae. The highest incidence of cellular labeling was observed for D(2) and D(5) receptors, while the incidence of D(1) and D(3) receptor expression was least. We conclude that the expression and extensive postsynaptic distribution of all known dopamine receptors in spinal cord correspond well with the broad descending dopaminergic projection territory supporting a widespread dopaminergic control over spinal neuronal systems. The dominant expression of D(2) receptors suggests a leading role for these receptors in dopaminergic actions on postsynaptic spinal neurons." @default.
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- W38478502 date "2007-11-01" @default.
- W38478502 modified "2023-09-26" @default.
- W38478502 title "Expression and distribution of all dopamine receptor subtypes (D1–D5) in the mouse lumbar spinal cord: A real-time polymerase chain reaction and non-autoradiographic in situ hybridization study" @default.
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- W38478502 doi "https://doi.org/10.1016/j.neuroscience.2007.07.052" @default.
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