Photoperiod Impacts Nucleus Accumbens Dopamine Dynamics.

Autor:	Jameson AN; Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37232., Siemann JK; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232., Melchior J; Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232., Calipari ES; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232.; Vanderbilt Center for Addiction Research, Vanderbilt University, Nashville, TN 37232.; Department of Pharmacology, Vanderbilt University, Nashville, TN 37232., McMahon DG; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232.; Department of Pharmacology, Vanderbilt University, Nashville, TN 37232.; Department of Biology, Vanderbilt University, Nashville, TN 37232., Grueter BA; Vanderbilt Brain Institute, Vanderbilt University, Nashville, TN 37232 brad.grueter@vumc.org.; Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN 37232.; Vanderbilt Center for Addiction Research, Vanderbilt University, Nashville, TN 37232.; Department of Pharmacology, Vanderbilt University, Nashville, TN 37232.; Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, TN 37232.
Jazyk:	angličtina
Zdroj:	ENeuro [eNeuro] 2023 Feb 16; Vol. 10 (2). Date of Electronic Publication: 2023 Feb 16 (Print Publication: 2023).
DOI:	10.1523/ENEURO.0361-22.2023
Abstrakt:	Circadian photoperiod, or day length, changes with the seasons and influences behavior to allow animals to adapt to their environment. Photoperiod is also associated with seasonal rhythms of affective state, as evidenced by seasonality of several neuropsychiatric disorders. Interestingly, seasonality tends to be more prevalent in women for affective disorders such as major depressive disorder and bipolar disorder (BD). However, the underlying neurobiological processes contributing to sex-linked seasonality of affective behaviors are largely unknown. Mesolimbic dopamine input to the nucleus accumbens (NAc) contributes to the regulation of affective state and behaviors. Additionally, sex differences in the mesolimbic dopamine pathway are well established. Therefore, we hypothesize that photoperiod may drive differential modulation of NAc dopamine in males and females. Here, we used fast-scan cyclic voltammetry (FSCV) to explore whether photoperiod can modulate subsecond dopamine signaling dynamics in the NAc core of male and female mice raised in seasonally relevant photoperiods. We found that photoperiod modulates dopamine signaling in the NAc core, and that this effect is sex-specific to females. Both release and uptake of dopamine were enhanced in the NAc core of female mice raised in long, summer-like photoperiods, whereas we did not find photoperiodic effects on NAc core dopamine in males. These findings uncover a potential neural circuit basis for sex-linked seasonality in affective behaviors. Competing Interests: The authors declare no competing financial interests. (Copyright © 2023 Jameson et al.)
Databáze:	MEDLINE
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