Sleep deprivation rapidly upregulates serotonin 2A receptor expression via the immediate early gene Egr3
Zhao, X.; Meyers, K. T.; McBride, A.; Marballi, K. K.; Maple, A. M.; Beck, K. L.; Kang, P.; Palner, M.; Overgaard, A.; Knudsen, G. M.; Gallitano, A. L.
Show abstract
Serotonin 2A receptors (5-HT2ARs) mediate the effects of hallucinogenic drugs and antipsychotic medications, and are reduced in schizophrenia patients brains. However, the mechanisms that regulate 5-HT2AR expression remain poorly understood. We show that an environmental stimulus, sleep deprivation, upregulates 5-HT2ARs in the mouse frontal cortex (FC) in just 6-8 hours. This induction requires the immediate early gene transcription factor early growth response 3 (Egr3). Further, EGR3 binds to the Htr2a promoter in the FC in vivo, and drives reporter construct expression in vitro via two Htr2a promoter binding sites. These findings suggest that EGR3 directly regulates FC Htr2a expression in response to physiologic stimuli, providing a mechanism by which environment rapidly alters levels of a brain receptor that mediates symptoms, and treatment, of mental illness. One Sentence SummaryJust 6-8 hours of sleep deprivation upregulates brain levels of the receptor that mediates the response to hallucinogens.
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