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- W2020030102 abstract "Hypothalamic 5HT1A receptors play an important role in the regulation of satiety, glycemia and endocrine status. In the present study, 8-OH-DPadministered centrally and peripherally to C57/Bl6 mice and plasma glucose insulin and corticosterone were evaluated. In these studies, dose and time dependent increases in glucose and corticosterone were observed while no alterations in insulin were seen. The increases in plasma corticosterone were prevented by prior central or peripheral administration of LY426965, a specific 5HT1A antagonist. Intracerebroventricular coadministration of a 5HT1A antagonist with 8-OH-DPAT prevented the increase in plasma glucose establishing this response as a centrally mediated response in mice. Given that increases in plasma corticosterone are associated with increases in plasma glucose, we conducted experiments to determine if increased plasma corticosterone was the mechanism by which 8-OH-DPAT increased plasma glucose. Prior administration of the glucocorticoid antagonist mifepristone did not affect the increase in plasma glucose produced by 8-OH-DPAT. Prior administration of the glucocorticoid synthesis inhibitor, metyrapone, reduced basal corticosterone and the concentrations of corticosterone associated with 8-OH-DPAT administration. However, metyrapone administration did not affect the increases in plasma glucose. Therefore, 5HT1A receptors regulate glucose through brain mechanisms, but not through regulation of the hypophyseal-pituitary axis. Antagonism of brain 5HT1A receptors may enable discovery of novel antidiabetic agents." @default.
- W2020030102 created "2016-06-24" @default.
- W2020030102 creator A5034348736 @default.
- W2020030102 creator A5050644618 @default.
- W2020030102 date "2014-12-01" @default.
- W2020030102 modified "2023-10-14" @default.
- W2020030102 title "5-Hydroxytryptamine 1A (5HT1A) receptors mediate increases in plasma glucose independent of corticosterone" @default.
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- W2020030102 doi "https://doi.org/10.1016/j.ejphar.2014.10.010" @default.
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