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Concurrent activation of dopamine D1 and D2 receptors (D1 and D2) is required for the expression of certain dopamine (DA)-mediated responses, such as climbing and stereotyped behaviors. Such interactions between D1 and D2 (i.e. D1/D2 synergism) represent an important aspect of dopaminergic function and plasticity. The D2 receptor exists in two isoforms: D2L and D2S. We have generated mice that selectively...
The dopamine D2 receptor (D2) is involved in the regulation of pituitary hormone secretion. Two isoforms of the D2 receptor, termed D2L and D2S, have been identified. We previously generated D2L knockout mice (D2L-/-), which still express D2S. The present study examined the role of D2S and D2L in spontaneous and drug-induced pituitary hormone secretion. We found that D2L-/- mice had normal serum levels...
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