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Reduced cortical somatostatin gene expression in a rat model of maternal immune activation

Citation

Duchatel, RJ and Harms, LR and Meehan, CL and Michie, PT and Bigland, MJ and Smith, DW and Jobling, P and Hodgson, DM and Tooney, PA, Reduced cortical somatostatin gene expression in a rat model of maternal immune activation, Psychiatry Research, 282 pp. 1-9. ISSN 0165-1781 (2019) [Refereed Article]

Copyright Statement

Crown Copyright 2019 Published by Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.psychres.2019.112621

Abstract

Alterations in GABAergic interneurons and glutamic acid decarboxylase (GAD) are observed in the brains of people with schizophrenia. Studies also show increased density of interstitial white matter neurons (IWMN), including those containing GAD and somatostatin (SST) in the brain in schizophrenia. Maternal immune activation can be modelled in rodents to investigate the relationship between prenatal exposure to infections and increased risk of developing schizophrenia. We reported that maternal immune activation induced an increase in density of somatostatin-positive IWMN in the adult rat offspring. Here we hypothesised that maternal immune activation induced in pregnant rats by polyinosinic:polycytidylic acid would alter SST and GAD gene expression as well as increase the density of GAD-positive IWMNs in the adult offspring. SST gene expression was significantly reduced in the cingulate cortex of adult offspring exposed to late gestation maternal immune activation. There was no change in cortical GAD gene expression nor GAD-positive IWMN density in adults rats exposed to maternal immune activation at either early or late gestation. This suggests that our model of maternal immune activation induced by prenatal exposure of rats to polyinosinic:polycytidylic acid during late gestation is able to recapitulate changes in SST but not other GABAergic neuropathologies observed in schizophrenia.

Item Details

Item Type:Refereed Article
Keywords:somatostatin, schizophrenia, maternal immune activation, cingulate cortex, white matter neuron
Research Division:Psychology and Cognitive Sciences
Research Group:Psychology
Research Field:Biological Psychology (Neuropsychology, Psychopharmacology, Physiological Psychology)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Psychology and Cognitive Sciences
UTAS Author:Meehan, CL (Dr Crystal Meehan)
ID Code:135589
Year Published:2019
Deposited By:Psychology
Deposited On:2019-11-04
Last Modified:2019-12-06
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