Journal
NATURE NEUROSCIENCE
Volume 9, Issue 6, Pages 732-734Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nn1711
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Disruption of overt circadian rhythms can occur without influencing the endogenous pacemaker, the so-called 'masking' effect classically elicited by light. As the physiological pathways involved in light masking remain elusive, we analyzed mice lacking the dopamine D2 receptor. Although circadian rhythmicity was normal, D2R-null mice showed a markedly deficient light masking response, indicating that D2R-mediated signaling is an essential component of the neuronal pathways leading to light masking of circadian rhythms.
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