Photoperiod Regulation of Mineralocorticoid Receptor mRNA Expression in Hamster Hippocampus
Document Type
Article
Publication Date
1-12-1998
Description
Hippocampal mineralocorticoid receptor mRNA expression was increased in male hamsters exposed to 18 days of short photoperiod relative to animals maintained under long day illumination (p < 0.05). Short day hamsters were also characterized by increased weight gain, and heavier adrenal glands (p < 0.05). The larger adrenals showed selective increases in the widths of the zonae reticularis and glomerulosa (p < 0.001). Incidences of torpor and reduced body temperature were observed in the short day animals. No changes were found in reproductive organ weights, systolic blood pressure, open-field behavior, or stress levels of plasma corticosteroids. We conclude that the hamster brain-adrenal axis responds rapidly to changes in photoperiod, raising the possibility that this axis is a primary mediator of shortened photoperiod responses.
Citation Information
Lance, S J.; Miller, S. C.; Holtsclaw, L. I.; and Turner, B A., "Photoperiod Regulation of Mineralocorticoid Receptor mRNA Expression in Hamster Hippocampus" (1998). ETSU Faculty Works. 412.
https://dc.etsu.edu/etsu-works-2/412