Immunohistochemical determination of the site of antidepressant-like effects of glucagon-like peptide-2 in ACTH-treated mice

Neuroscience
Sachie Sasaki-HamadaJ-I Oka

Abstract

The intracerebroventicular administration (i.c.v.) of glucagon-like peptide-2 (GLP-2) had antidepressant-like effects on saline-treated mice in the forced-swim test. The GLP-2 treatment (3 μg, i.c.v.) for 6 days, but not that of imipramine had antidepressant-like effects on adrenocorticotropic hormone (ACTH)-treated mice. The immunohistochemical detection of the c-fos protein (Fos) revealed that the administration of GLP-2 induced Fos-immunoreactivity (Fos-IR) in the dorsomedial hypothalamic nucleus in saline-treated and ACTH-treated mice, and also in the hippocampal dentate gyrus in ACTH-treated mice, but not in saline-treated mice. In contrast, Fos-IR in the paraventricular nucleus of the hypothalamus decreased after the administration of GLP-2 to ACTH-treated mice. In ACTH-treated mice, the chronic administration of GLP-2 affected hippocampal neurogenesis, in addition to Fos-IR in hypothalamic GABAergic neurons and corticotrophin-releasing factor-containing neurons. These results suggest that GLP-2 acts on specific brain regions to regulate stress conditions, and induces antidepressant-like effects under imipramine-resistant conditions, which may be associated with the modulation of the hypothalamic-pituitary-adrenal-axis.

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Citations

Aug 9, 2016·Progress in Neuro-psychopharmacology & Biological Psychiatry·Sachie Sasaki-HamadaJun-Ichiro Oka
Jul 22, 2016·Purinergic Signalling·Elda Leonor Pacheco-PantojaJames A Gallagher
May 8, 2019·Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan·Jun-Ichiro Oka
Dec 23, 2017·Frontiers in Immunology·Lihua DuanJixin Zhong
Jun 12, 2021·Journal of Controlled Release : Official Journal of the Controlled Release Society·Tomomi AkitaChikamasa Yamashita

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