Abstract
Calcitonin gene-related peptide (CGRP) is a neuropeptide that has potent vasodilator properties and is involved in various behavioral disorders. The relationship between CGRP and depression-like behavior is unclear. In this study, we used chronically stressed mice to investigate whether CGRP is involved in depression-like behavior. Each mouse was exposed to restraint and water immersion stress for 15 days. After stress exposure, mice were assessed using behavioral tests: open field test, forced swim test and sucrose preference test. Serum corticosterone levels, hippocampal proliferation and mRNA expression of neurotrophins were measured. After stress exposure, mice exhibited depression-like behavior and decreased CGRP mRNA levels in the hippocampus. Although intracerebroventricular CGRP administration (0.5€‰nmol) did not alter depression-like behavior after 15-day stress exposure, a single CGRP administration into the brain, before the beginning of the 15-day stress exposure, normalized the behavioral dysfunctions and increased nerve growth factor (Ngf) mRNA levels in stressed mice. Furthermore, in the mouse E14 hippocampal cell line, CGRP treatment induced increased expression of Ngf mRNA. The NGF receptor inhibitor K252a inhibited CGRPs antidepressant-like effects in stressed mice. These results suggest that CGRP expression in the mouse hippocampus is associated with depression-like behavior and changes in Ngf mRNA levels.
| Original language | English |
|---|---|
| Article number | 12559 |
| Journal | Scientific Reports |
| Volume | 5 |
| DOIs | |
| Publication status | Published - Aug 7 2015 |
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Calcitonin gene-related peptide pre-administration acts as a novel antidepressant in stressed mice. / Hashikawa-Hobara, Narumi; Ogawa, Takumi; Sakamoto, Yusuke; Matsuo, Yumi; Ogawa, Mami; Zamami, Yoshito; Hashikawa, Naoya.
In: Scientific Reports, Vol. 5, 12559, 07.08.2015.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Calcitonin gene-related peptide pre-administration acts as a novel antidepressant in stressed mice
AU - Hashikawa-Hobara, Narumi
AU - Ogawa, Takumi
AU - Sakamoto, Yusuke
AU - Matsuo, Yumi
AU - Ogawa, Mami
AU - Zamami, Yoshito
AU - Hashikawa, Naoya
PY - 2015/8/7
Y1 - 2015/8/7
N2 - Calcitonin gene-related peptide (CGRP) is a neuropeptide that has potent vasodilator properties and is involved in various behavioral disorders. The relationship between CGRP and depression-like behavior is unclear. In this study, we used chronically stressed mice to investigate whether CGRP is involved in depression-like behavior. Each mouse was exposed to restraint and water immersion stress for 15 days. After stress exposure, mice were assessed using behavioral tests: open field test, forced swim test and sucrose preference test. Serum corticosterone levels, hippocampal proliferation and mRNA expression of neurotrophins were measured. After stress exposure, mice exhibited depression-like behavior and decreased CGRP mRNA levels in the hippocampus. Although intracerebroventricular CGRP administration (0.5€‰nmol) did not alter depression-like behavior after 15-day stress exposure, a single CGRP administration into the brain, before the beginning of the 15-day stress exposure, normalized the behavioral dysfunctions and increased nerve growth factor (Ngf) mRNA levels in stressed mice. Furthermore, in the mouse E14 hippocampal cell line, CGRP treatment induced increased expression of Ngf mRNA. The NGF receptor inhibitor K252a inhibited CGRPs antidepressant-like effects in stressed mice. These results suggest that CGRP expression in the mouse hippocampus is associated with depression-like behavior and changes in Ngf mRNA levels.
AB - Calcitonin gene-related peptide (CGRP) is a neuropeptide that has potent vasodilator properties and is involved in various behavioral disorders. The relationship between CGRP and depression-like behavior is unclear. In this study, we used chronically stressed mice to investigate whether CGRP is involved in depression-like behavior. Each mouse was exposed to restraint and water immersion stress for 15 days. After stress exposure, mice were assessed using behavioral tests: open field test, forced swim test and sucrose preference test. Serum corticosterone levels, hippocampal proliferation and mRNA expression of neurotrophins were measured. After stress exposure, mice exhibited depression-like behavior and decreased CGRP mRNA levels in the hippocampus. Although intracerebroventricular CGRP administration (0.5€‰nmol) did not alter depression-like behavior after 15-day stress exposure, a single CGRP administration into the brain, before the beginning of the 15-day stress exposure, normalized the behavioral dysfunctions and increased nerve growth factor (Ngf) mRNA levels in stressed mice. Furthermore, in the mouse E14 hippocampal cell line, CGRP treatment induced increased expression of Ngf mRNA. The NGF receptor inhibitor K252a inhibited CGRPs antidepressant-like effects in stressed mice. These results suggest that CGRP expression in the mouse hippocampus is associated with depression-like behavior and changes in Ngf mRNA levels.
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UR - http://www.scopus.com/inward/citedby.url?scp=84938769523&partnerID=8YFLogxK
U2 - 10.1038/srep12559
DO - 10.1038/srep12559
M3 - Article
AN - SCOPUS:84938769523
VL - 5
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 12559
ER -