Insulin-like growth factor 2 mitigates depressive behavior in a rat model of chronic stress

Depression is a common psychiatric disorder associated with chronic stress. Insulin-like growth factor 2 (IGF2) is a growth factor that serves important roles in the brain during development and at adulthood. Here, the role of IGF2 expression in the hippocampus was investigated in a rat model of dep...

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Veröffentlicht in:Neuropharmacology 2015-02, Vol.89, p.318-324
Hauptverfasser: Luo, Yan-Wei, Xu, Yang, Cao, Wen-Yu, Zhong, Xiao-Lin, Duan, Juan, Wang, Xue-Qin, Hu, Zhao-Lan, Li, Fang, Zhang, Jian-Yi, Zhou, Ming, Dai, Ru-Ping, Li, Chang-Qi
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container_title Neuropharmacology
container_volume 89
creator Luo, Yan-Wei
Xu, Yang
Cao, Wen-Yu
Zhong, Xiao-Lin
Duan, Juan
Wang, Xue-Qin
Hu, Zhao-Lan
Li, Fang
Zhang, Jian-Yi
Zhou, Ming
Dai, Ru-Ping
Li, Chang-Qi
description Depression is a common psychiatric disorder associated with chronic stress. Insulin-like growth factor 2 (IGF2) is a growth factor that serves important roles in the brain during development and at adulthood. Here, the role of IGF2 expression in the hippocampus was investigated in a rat model of depression. A chronic restraint stress (CRS) model of depression was established in rats, exhibiting depression-like behavior as assessed with the sucrose preference test (SPT) and forced swimming test (FST), and with evaluation of the corticosterone levels. Hippocampal IGF2 levels were significantly lower in rats suffering CRS than in controls, as were levels of pERK1/2 and GluR1. Lentivirus-mediated hippocampal IGF2 overexpression alleviated depressive behavior in restrained rats, elevated the levels of pERK1/2 and GluR1 proteins, but it did not affect the expression of pGSK3β, GluR2, NMDAR1, and NMDAR2A. These results suggest the chronic restraint stress induces depressive behavior, which may be mediated by ERK-dependent IGF2 signaling, pointing to an antidepressant role for this molecular pathway. •Chronic restraint stress was associated with decreased IGF2 expression in the hippocampus.•Induced IGF2 expression alleviated depressive-like behaviors in stressed rats.•Induced IGF2 expression prevented GluR1 down-regulation in stressed rats.•The antidepressant effect of IGF2 was mediated by ERK signaling.
doi_str_mv 10.1016/j.neuropharm.2014.10.011
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Insulin-like growth factor 2 (IGF2) is a growth factor that serves important roles in the brain during development and at adulthood. Here, the role of IGF2 expression in the hippocampus was investigated in a rat model of depression. A chronic restraint stress (CRS) model of depression was established in rats, exhibiting depression-like behavior as assessed with the sucrose preference test (SPT) and forced swimming test (FST), and with evaluation of the corticosterone levels. Hippocampal IGF2 levels were significantly lower in rats suffering CRS than in controls, as were levels of pERK1/2 and GluR1. Lentivirus-mediated hippocampal IGF2 overexpression alleviated depressive behavior in restrained rats, elevated the levels of pERK1/2 and GluR1 proteins, but it did not affect the expression of pGSK3β, GluR2, NMDAR1, and NMDAR2A. These results suggest the chronic restraint stress induces depressive behavior, which may be mediated by ERK-dependent IGF2 signaling, pointing to an antidepressant role for this molecular pathway. •Chronic restraint stress was associated with decreased IGF2 expression in the hippocampus.•Induced IGF2 expression alleviated depressive-like behaviors in stressed rats.•Induced IGF2 expression prevented GluR1 down-regulation in stressed rats.•The antidepressant effect of IGF2 was mediated by ERK signaling.</description><identifier>ISSN: 0028-3908</identifier><identifier>EISSN: 1873-7064</identifier><identifier>DOI: 10.1016/j.neuropharm.2014.10.011</identifier><identifier>PMID: 25446675</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Animals ; Antidepressant ; Body Weight - physiology ; Chronic Disease ; Corticosterone - metabolism ; Depression ; Depression - drug therapy ; Depression - etiology ; Disease Models, Animal ; ERK1/2 ; Food Preferences ; Gene Expression Regulation - physiology ; Glycogen Synthase Kinase 3 - metabolism ; Glycogen Synthase Kinase 3 beta ; Green Fluorescent Proteins - genetics ; Green Fluorescent Proteins - metabolism ; Hippocampus ; IGF2 ; Insulin-Like Growth Factor II - genetics ; Insulin-Like Growth Factor II - metabolism ; Male ; MAP Kinase Signaling System - physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, AMPA - genetics ; Receptors, AMPA - metabolism ; Stress, Psychological - complications ; Stress, Psychological - pathology ; Sucrose - administration &amp; dosage ; Swimming - psychology ; Transduction, Genetic</subject><ispartof>Neuropharmacology, 2015-02, Vol.89, p.318-324</ispartof><rights>2014 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c473t-7736f555a872818a6b758e808d26b623551470938b7681802fba52062c8db7f43</citedby><cites>FETCH-LOGICAL-c473t-7736f555a872818a6b758e808d26b623551470938b7681802fba52062c8db7f43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S002839081400375X$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/25446675$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Luo, Yan-Wei</creatorcontrib><creatorcontrib>Xu, Yang</creatorcontrib><creatorcontrib>Cao, Wen-Yu</creatorcontrib><creatorcontrib>Zhong, Xiao-Lin</creatorcontrib><creatorcontrib>Duan, Juan</creatorcontrib><creatorcontrib>Wang, Xue-Qin</creatorcontrib><creatorcontrib>Hu, Zhao-Lan</creatorcontrib><creatorcontrib>Li, Fang</creatorcontrib><creatorcontrib>Zhang, Jian-Yi</creatorcontrib><creatorcontrib>Zhou, Ming</creatorcontrib><creatorcontrib>Dai, Ru-Ping</creatorcontrib><creatorcontrib>Li, Chang-Qi</creatorcontrib><title>Insulin-like growth factor 2 mitigates depressive behavior in a rat model of chronic stress</title><title>Neuropharmacology</title><addtitle>Neuropharmacology</addtitle><description>Depression is a common psychiatric disorder associated with chronic stress. Insulin-like growth factor 2 (IGF2) is a growth factor that serves important roles in the brain during development and at adulthood. Here, the role of IGF2 expression in the hippocampus was investigated in a rat model of depression. A chronic restraint stress (CRS) model of depression was established in rats, exhibiting depression-like behavior as assessed with the sucrose preference test (SPT) and forced swimming test (FST), and with evaluation of the corticosterone levels. Hippocampal IGF2 levels were significantly lower in rats suffering CRS than in controls, as were levels of pERK1/2 and GluR1. Lentivirus-mediated hippocampal IGF2 overexpression alleviated depressive behavior in restrained rats, elevated the levels of pERK1/2 and GluR1 proteins, but it did not affect the expression of pGSK3β, GluR2, NMDAR1, and NMDAR2A. 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subjects Animals
Antidepressant
Body Weight - physiology
Chronic Disease
Corticosterone - metabolism
Depression
Depression - drug therapy
Depression - etiology
Disease Models, Animal
ERK1/2
Food Preferences
Gene Expression Regulation - physiology
Glycogen Synthase Kinase 3 - metabolism
Glycogen Synthase Kinase 3 beta
Green Fluorescent Proteins - genetics
Green Fluorescent Proteins - metabolism
Hippocampus
IGF2
Insulin-Like Growth Factor II - genetics
Insulin-Like Growth Factor II - metabolism
Male
MAP Kinase Signaling System - physiology
Rats
Rats, Sprague-Dawley
Receptors, AMPA - genetics
Receptors, AMPA - metabolism
Stress, Psychological - complications
Stress, Psychological - pathology
Sucrose - administration & dosage
Swimming - psychology
Transduction, Genetic
title Insulin-like growth factor 2 mitigates depressive behavior in a rat model of chronic stress
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