Title

Maternal immune activation alters behavior in adult offspring, with subtle changes in the cortical transcriptome and epigenome

Student Author(s)

Aslihan Dincer; Caroline Connor

GSBS Program

Bioinformatics & Computational Biology

UMMS Affiliation

Department of Psychiatry, Brudnick Neuropsychiatric Research Institute; Program in Molecular Medicine

Date

7-15-2012

Document Type

Article

Medical Subject Headings

Immunity; Adjuvants, Immunologic; Poly I-C; Psychotic Disorders; Transcriptome; Epigenesis, Genetic; Cerebral Cortex

Disciplines

Immunology and Infectious Disease | Life Sciences | Medicine and Health Sciences | Neuroscience and Neurobiology | Psychiatry

Abstract

Maternal immune activation during prenatal development, including treatment with the viral RNA mimic, polyriboinosinic–polyribocytidilic acid (poly IC), serves as a widely used animal model to induce behavioral deficits reminiscent of schizophrenia and related disease. Here, we report that massive cytokine activation after a single dose of poly IC in the prenatal period is associated with lasting working memory deficits in adult offspring. To explore whether dysregulated gene expression in cerebral cortex, contributes to cognitive dysfunction, we profiled the cortical transcriptome, and in addition, mapped the genome-wide distribution of trimethylated histone H3-lysine 4 (H3K4me3), an epigenetic mark sharply regulated at the 5′ end of transcriptional units. However, deep sequencing-based H3K4me3 mapping and mRNA profiling by microarray did not reveal significant alterations in mature cerebral cortex after poly IC exposure at embryonic days E17.5 or E12.5. At a small set of genes (including suppressor of cytokine signaling Socs3), H3K4me3 was sensitive to activation of cytokine signaling in primary cultures from fetal forebrain but adult cortex of saline- and poly IC-exposed mice did not show significant differences. A limited set of transcription start sites (TSS), including Disrupted-in-Schizophrenia 1 (Disc1), a schizophrenia risk gene often implicated in gene–environment interaction models, showed altered H3K4me3 after prenatal poly IC but none of these differences survived after correcting for multiple comparisons. We conclude that prenatal poly IC is associated with cognitive deficits later in life, but without robust alterations in epigenetic regulation of gene expression in the cerebral cortex.

Comments

Citation: Schizophr Res. 2012 Sep;140(1-3):175-84. Epub 2012 Jul 16., doi:10.1016/j.schres.2012.06.037. Link to article on publisher's site

Co-author Caroline Connor is a student in the Neuroscience and MD/PhD programs in the Graduate School of Biomedical Sciences (GSBS) at UMass Medical School. Aslihan Dincer is a student in GSBS' Bioinformatics & Computational Biology program.

Related Resources

Link to article in PubMed