Abstract
Instrumental conditioning allows animals to learn about the consequences of their own actions, but the underpinning molecular mechanisms remain elusive. Here we show that the sphingosine-1-phosphate (S1P) receptor Gpr6 is selectively expressed in the striatopallidal neurons in the striatum. Gpr6-deficient mice showed reduced striatal cyclic AMP production in vitro and selective alterations in instrumental conditioning in vivo. Thus, Gpr6 is the first striatopallidal neuron–specific genetic regulator of instrumental conditioning in a mammal.
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Acknowledgements
We would like to thank B. Leung for technical support, C. Evans, N. Maidment and A. Charles for discussions and help in the project, and C. Evans and K. Roberts for met-enkephalin antibody and for assistance in cAMP assays. We also thank Deltagen for the Gpr6−/− mice, and N. Heintz (Rockefeller University) and the US National Institute of Neurological Disorders and Stroke Gene Expression Nervous System Atlas Project and Mutant Mouse Regional Resource Center for the Drd1-, Drd2- and Gpr6-GFP mice. This work was supported in part by pilot grants from the University of California, Los Angeles Hatos Center for Neuropharmacology, grants from the US National Institute on Drug Abuse (P50DA05010) to X.W.Y., grants from the US National Institute on Mental Health (MH56446) to B.W.B., and a University of California, Los Angeles Mental Retardation Research Center training grant from the US National Institute on Child Health and Human Development (5T32HD007032) to M.K.L.
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M.K.L. conducted all phases of the experimental work and data analyses, except for the instrumental conditioning studies, and contributed to writing the manuscript. Y.C. contributed to the instrumental conditioning studies. S.B.O. contributed to manuscript preparation and to the data analysis of the instrumental conditioning studies. X.W.Y. and B.W.B. were responsible for the overall design of the project, analyses of the results and writing of the manuscript.
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Lobo, M., Cui, Y., Ostlund, S. et al. Genetic control of instrumental conditioning by striatopallidal neuron–specific S1P receptor Gpr6. Nat Neurosci 10, 1395–1397 (2007). https://doi.org/10.1038/nn1987
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DOI: https://doi.org/10.1038/nn1987
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