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Alsegehy S, Southey BR, Hernandez AG, Rund LA, Antonson AM, Nowak RA, Johnson RW, Rodriguez-Zas SL. Epigenetic disruptions in the offspring hypothalamus in response to maternal infection. Gene 2024; 910:148329. [PMID: 38431234 DOI: 10.1016/j.gene.2024.148329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/16/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
DNA methylation is an epigenetic modification that can alter gene expression, and the incidence can vary across developmental stages, inflammatory conditions, and sexes. The effects of viral maternal viral infection and sex on the DNA methylation patterns were studied in the hypothalamus of a pig model of immune activation during development. DNA methylation at single-base resolution in regions of high CpG density was measured on 24 individual hypothalamus samples using reduced representation bisulfite sequencing. Differential over- and under-methylated sites were identified and annotated to proximal genes and corresponding biological processes. A total of 120 sites were differentially methylated (FDR-adjusted p-value < 0.05) between maternal infection or sex groups. Among the 66 sites differentially methylated between groups exposed to inflammatory signals and control, most sites were over-methylated in the challenged group and included sites in the promoter regions of genes SIRT3 and NRBP1. Among the 54 differentially methylated sites between females and males, most sites were over-methylated in females and included sites in the promoter region of genes TNC and EIF4G1. The analysis of the genes proximal to the differentially methylated sites suggested that biological processes potentially impacted include immune response, neuron migration and ensheathment, peptide signaling, adaptive thermogenesis, and tissue development. These results suggest that translational studies should consider that the prolonged effect of maternal infection during gestation may be enacted through epigenetic regulatory mechanisms that may differ between sexes.
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Affiliation(s)
- Samah Alsegehy
- Informatics Program, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Alvaro G Hernandez
- Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Lauretta A Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Adrienne M Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Romana A Nowak
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Sandra L Rodriguez-Zas
- Informatics Program, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA; Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA.
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2
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Rodriguez-Zas SL, Nowak RA, Antonson AM, Rund L, Bhamidi S, Gomez AN, Southey BR, Johnson RW. Immune and metabolic challenges induce changes in pain sensation and related pathways in the hypothalamus. Physiol Genomics 2024; 56:343-359. [PMID: 38189117 DOI: 10.1152/physiolgenomics.00134.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/06/2023] [Accepted: 12/21/2023] [Indexed: 01/09/2024] Open
Abstract
The hypothalamic molecular processes participate in the regulation of the neuro-immune-endocrine system, including hormone, metabolite, chemokine circulation, and corresponding physiological and behavioral responses. RNA-sequencing profiles were analyzed to understand the effect of juvenile immune and metabolic distress 100 days after virally elicited maternal immune activation during gestation in pigs. Over 1,300 genes exhibited significant additive or interacting effects of gestational immune activation, juvenile distress, and sex. One-third of these genes presented multiple effects, emphasizing the complex interplay of these factors. Key functional categories enriched among affected genes included sensory perception of pain, steroidogenesis, prolactin, neuropeptide, and inflammatory signaling. These categories underscore the intricate relationship between gestational immune activation during gestation, distress, and the response of hypothalamic pathways to insults. These effects were sex-dependent for many genes, such as Prdm12, Oprd1, Isg20, Prl, Oxt, and Vip. The prevalence of differentially expressed genes annotated to proinflammatory and cell cycle processes suggests potential implications for synaptic plasticity and neuronal survival. The gene profiles affected by immune activation, distress, and sex pointed to the action of transcription factors SHOX2, STAT1, and REST. These findings underscore the importance of considering sex and postnatal challenges when studying causes of neurodevelopmental disorders and highlight the complexity of the "two-hit" hypothesis in understanding their etiology. Our study furthers the understanding of the intricate molecular responses in the hypothalamus to gestational immune activation and subsequent distress, shedding light on the sex-specific effects and the potential long-lasting consequences on pain perception, neuroendocrine regulation, and inflammatory processes.NEW & NOTEWORTHY The interaction of infection during gestation and insults later in life influences the molecular mechanisms in the hypothalamus that participate in pain sensation. The response of the hypothalamic transcriptome varies between sexes and can also affect synapses and immune signals. The findings from this study assist in the identification of agonists or antagonists that can guide pretranslational studies to ameliorate the effects of gestational insults interacting with postnatal challenges on physiological or behavioral disorders.
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Affiliation(s)
- Sandra L Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Carl R. Woese Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Romana A Nowak
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Carl R. Woese Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Adrienne M Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Laurie Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Sreelaya Bhamidi
- School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Andrea N Gomez
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
- Carl R. Woese Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois, United States
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3
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Rodriguez-Zas SL, Southey NL, Rund L, Antonson AM, Nowak RA, Johnson RW. Prenatal and postnatal challenges affect the hypothalamic molecular pathways that regulate hormonal levels. PLoS One 2023; 18:e0292952. [PMID: 37851674 PMCID: PMC10584192 DOI: 10.1371/journal.pone.0292952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 10/02/2023] [Indexed: 10/20/2023] Open
Abstract
This study aimed to improve our understanding of how the hypothalamus mediates the effects of prenatal and postnatal challenges on behavior and sensitivity to stimuli. A pig model of virally initiated maternal immune activation (MIA) was used to investigate potential interactions of the prenatal challenge both with sex and with postnatal nursing withdrawal. The hypothalami of 72 females and males were profiled for the effects of MIA and nursing withdrawal using RNA-sequencing. Significant differential expression (FDR-adjusted p value < 0.05) was detected in the profile of 222 genes. Genes involved in the Gene Ontology biological process of regulation of hormone levels tended to be over-expressed in individuals exposed to both challenges relative to individuals exposed to either one challenge, and most of these genes were over-expressed in MIA females relative to males across nursing levels. Differentially expressed genes included Fshb, Ttr, Agrp, Gata3, Foxa2, Tfap2b, Gh1, En2, Cga, Msx1, and Npy. The study also found that prenatal and postnatal challenges, as well as sex, impacted the regulation of neurotransmitter activity and immune effector processes in the hypothalamus. In particular, the olfactory transduction pathway genes were over-expressed in weaned MIA males, and several transcription factors were potentially found to target the differentially expressed genes. Overall, these results highlight how multiple environmental challenges can interact and affect the molecular mechanisms of the hypothalamus, including hormonal, immune response, and neurotransmitter processes.
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Affiliation(s)
- Sandra L. Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Nicole L. Southey
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Laurie Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Adrienne M. Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Romana A. Nowak
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Rodney W. Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Division of Nutritional Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
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4
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Abstract
Inflammation during prenatal development can be detrimental to neurodevelopmental processes, increasing the risk of neuropsychiatric disorders. Prenatal exposure to maternal viral infection during pregnancy is a leading environmental risk factor for manifestation of these disorders. Preclinical animal models of maternal immune activation (MIA), established to investigate this link, have revealed common immune and microbial signaling pathways that link mother and fetus and set the tone for prenatal neurodevelopment. In particular, maternal intestinal T helper 17 cells, educated by endogenous microbes, appear to be key drivers of effector IL-17A signals capable of reaching the fetal brain and causing neuropathologies. Fetal microglial cells are particularly sensitive to maternally derived inflammatory and microbial signals, and they shift their functional phenotype in response to MIA. Resulting cortical malformations and miswired interneuron circuits cause aberrant offspring behaviors that recapitulate core symptoms of human neurodevelopmental disorders. Still, the popular use of "sterile" immunostimulants to initiate MIA has limited translation to the clinic, as these stimulants fail to capture biologically relevant innate and adaptive inflammatory sequelae induced by live pathogen infection. Thus, there is a need for more translatable MIA models, with a focus on relevant pathogens like seasonal influenza viruses.
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Affiliation(s)
- Ashley M. Otero
- Neuroscience ProgramUniversity of Illinois Urbana‐ChampaignUrbanaIllinoisUSA
| | - Adrienne M. Antonson
- Department of Animal SciencesUniversity of Illinois Urbana‐ChampaignUrbanaIllinoisUSA
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5
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Keever-Keigher MR, Zhang P, Bolt CR, Rymut HE, Antonson AM, Caputo MP, Houser AK, Hernandez AG, Southey BR, Rund LA, Johnson RW, Rodriguez-Zas SL. Interacting impact of maternal inflammatory response and stress on the amygdala transcriptome of pigs. G3 (Bethesda) 2021; 11:jkab113. [PMID: 33856433 PMCID: PMC8496236 DOI: 10.1093/g3journal/jkab113] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 03/17/2021] [Indexed: 12/13/2022]
Abstract
Changes at the molecular level capacitate the plasticity displayed by the brain in response to stress stimuli. Weaning stress can trigger molecular changes that influence the physiology of the offspring. Likewise, maternal immune activation (MIA) during gestation has been associated with behavior disorders and molecular changes in the amygdala of the offspring. This study advances the understanding of the effects of pre- and postnatal stressors in amygdala gene networks. The amygdala transcriptome was profiled on female and male pigs that were either exposed to viral-elicited MIA or not and were weaned or nursed. Overall, 111 genes presented interacting or independent effects of weaning, MIA, or sex (FDR-adjusted P-value <0.05). PIGY upstream reading frame and orthodenticle homeobox 2 are genes associated with MIA-related neurological disorders, and presented significant under-expression in weaned relative to nursed pigs exposed to MIA, with a moderate pattern observed in non-MIA pigs. Enriched among the genes presenting highly over- or under-expression profiles were 24 Kyoto Encyclopedia of Genes and Genomes pathways including inflammation, and neurological disorders. Our results indicate that MIA and sex can modulate the effect of weaning stress on the molecular mechanisms in the developing brain. Our findings can help identify molecular targets to ameliorate the effects of pre- and postnatal stressors on behaviors regulated by the amygdala such as aggression and feeding.
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Affiliation(s)
- Marissa R Keever-Keigher
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Pan Zhang
- Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Courtni R Bolt
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Haley E Rymut
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Adrienne M Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Megan P Caputo
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Alexandra K Houser
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Alvaro G Hernandez
- High-Throughput Sequencing and Genotyping Unit, Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Laurie A Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
| | - Sandra L Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
- Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
- Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
- Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61820, USA
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6
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Antonson AM, Kenney AD, Chen HJ, Corps KN, Yount JS, Gur TL. Moderately pathogenic maternal influenza A virus infection disrupts placental integrity but spares the fetal brain. Brain Behav Immun 2021; 96:28-39. [PMID: 33989741 PMCID: PMC8319055 DOI: 10.1016/j.bbi.2021.05.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/15/2021] [Accepted: 05/09/2021] [Indexed: 12/11/2022] Open
Abstract
Maternal infection during pregnancy is a known risk factor for offspring mental health disorders. Animal models of maternal immune activation (MIA) have implicated specific cellular and molecular etiologies of psychiatric illness, but most rely on pathogen mimetics. Here, we developed a mouse model of live H3N2 influenza A virus (IAV) infection during pregnancy that induces a robust inflammatory response but is sublethal to both dams and offspring. We observed classic indicators of lung inflammation and severely diminished weight gain in IAV-infected dams. This was accompanied by immune cell infiltration in the placenta and partial breakdown of placental integrity. However, indications of fetal neuroinflammation were absent. Further hallmarks of mimetic-induced MIA, including enhanced circulating maternal IL-17A, were also absent. Respiratory IAV infection did result in an upregulation in intestinal expression of transcription factor RORγt, master regulator of a subset of T lymphocytes, TH17 cells, which are heavily implicated in MIA-induced etiologies. Nonetheless, subsequent augmentation in IL-17A production and concomitant overt intestinal injury was not evident. Our results suggest that mild or moderately pathogenic IAV infection during pregnancy does not inflame the developing fetal brain, and highlight the importance of live pathogen infection models for the study of MIA.
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Affiliation(s)
- Adrienne M Antonson
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry & Behavioral Health, The Ohio State University, Columbus, OH, USA; Biosciences Division, College of Dentistry, The Ohio State University, Columbus, OH, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA; Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | - Adam D Kenney
- Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA; Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, USA
| | - Helen J Chen
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry & Behavioral Health, The Ohio State University, Columbus, OH, USA; Medical Scientist Training Program, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA
| | - Kara N Corps
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, USA
| | - Jacob S Yount
- Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA; Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, USA
| | - Tamar L Gur
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, OH, USA; Department of Psychiatry & Behavioral Health, The Ohio State University, Columbus, OH, USA; Infectious Diseases Institute, The Ohio State University, Columbus, OH, USA; Medical Scientist Training Program, The Ohio State University, Columbus, OH, USA; Department of Neuroscience, The Ohio State University, Columbus, OH, USA; Department of Obstetrics & Gynecology, The Ohio State University, Columbus, OH, USA.
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7
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Keever MR, Zhang P, Bolt CR, Rymut HE, Antonson AM, Corbett MP, Houser AK, Southy BR, Rund LA, Johnson RW, Rodriguez-Zas SL. PSV-6 Detection of sex-by-maternal immune activation effects on the molecular pathways of the pig amygdala. J Anim Sci 2020. [DOI: 10.1093/jas/skaa278.408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
The prolonged and sex-dependent impact of maternal immune activation (MIA) on the molecular pathways of the amygdala, a brain region that influences social, cognitive, and sexually dimorphic behaviors, is only partially understood. To address this gap, the effect of MIA elicited by porcine reproductive and respiratory syndrome virus (PRRSV) infection during gestation on the amygdala transcriptome of pigs was studied. Gene expression levels were measured using RNA-Seq on the amygdala for 3-week-old female and male offspring from MIA and control groups. Among the 328 genes that exhibited an MIA-by-sex effect, the majority annotated to functional categories relevant to behavioral abnormalities, including neuroactive ligand-receptor pathways, glutamatergic functions, and neuropeptide systems. Genes in these categories included corticotropin releasing hormone receptor 2, glutamate metabotropic receptor 4, glycoprotein hormones, alpha polypeptide, parathyroid hormone 1 receptor, vasointestinal peptide receptor 2, neurotensin, proenkephalin, and gastrin releasing peptide. These genes and functional categories have been associated with MIA-related schizophrenia and autism spectrum behavior disorders. The transcript and network dysregulation uncovered in this study advances the understanding necessary to develop treatments that ameliorate the effects of neurodevelopmental disorders caused by gestational MIA exposure. This study is supported by USDA NIFA AFRI, grant number 2018-67015-27413.
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Affiliation(s)
| | - Pan Zhang
- University of Illinois at Urbana-Champaign
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Keever MR, Zhang P, Bolt CR, Rymut HE, Antonson AM, Corbett MP, Houser AK, Southy BR, Rund LA, Johnson RW, Rodriguez-Zas SL. PSVIII-1 A transcriptomic study of the effect of PRRSV infection during gestation on the piglet amygdala. J Anim Sci 2020. [DOI: 10.1093/jas/skaa278.461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) is an economic burden on the swine industry, resulting in losses not only related to animal death but also to reduced offspring productivity. Understanding the underlying molecular pathways that contribute to decreased feed efficiency and behaviors that result in poorer performance is important for the implementation of management practices that aim to mitigate the effects of PRRSV. To uncover the long-term effects of PRRSV infection during gestation, a transcriptome analysis of the amygdala of 22-day-old piglet offspring from maternal PRRSV activated and control gilts was undertaken. Overall, 161 genes were differentially expressed between the PRRSV and control piglet offspring. Many of the genes were over-expressed in pigs from PRRSV compared to control gilts, such as interferon induced transmembrane protein 3 and neuron derived neurotrophic factor. Few genes were under-expressed, including insulin-like growth factor 2 and aldehyde dehydrogenase 1 family member A1. The detection of these dysregulated genes and the directionality of their differential expression yielded insights into the effects that maternal PRRSV infection has on the neural pathways of the offspring amygdala. This furthers our understanding of molecular processes underlying pathological behaviors that may be exhibited by these pigs, affecting management and production. This study is supported by USDA NIFA AFRI, grant number 2018-67015-27413.
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Affiliation(s)
| | - Pan Zhang
- University of Illinois at Urbana-Champaign
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9
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Rymut HE, Bolt CR, Caputo MP, Houser AK, Antonson AM, Zimmerman JD, Villamil MB, Southey BR, Rund LA, Johnson RW, Rodriguez-Zas SL. Long-Lasting Impact of Maternal Immune Activation and Interaction With a Second Immune Challenge on Pig Behavior. Front Vet Sci 2020; 7:561151. [PMID: 33330688 PMCID: PMC7732429 DOI: 10.3389/fvets.2020.561151] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/28/2020] [Indexed: 01/30/2023] Open
Abstract
The combined effects on pig behavior of maternal immune challenge during gestation followed by a second immune challenge later in life have not been studied. Porcine reproductive and respiratory syndrome virus (PRRSV) infection during gestation can elicit maternal immune activation (MIA) yet the interactions with the offspring response to a second immune challenge after birth remains unexplored. Knowledge on the response to viral challenges in rodents has been gained through the use of the viral mimetic polyinosinic-polycytidylic acid (Poly(I:C)), yet the effects of this immune stimulant on pig behavior have not been assessed. This study advances the understanding of the combined effect of MIA and a second immune challenge later in life on female and male pig behavior. Three complementary experiments enabled the development of an effective Poly(I:C) challenge in pigs, and testing the interaction between PRRSV-elicited MIA, Poly(I:C) challenge at 60 days of age, and sex on behaviors. Individual-level observations on sickness, locomotor, and social behaviors were measured 1-3 h after Poly(I:C) challenge. Vomiting, panting, lethargy, walking, laying, playing, and touching behaviors were analyzed using generalized linear mixed effect models. Results indicated that a Poly(I:C) dose of 1 mg/kg within 1 h after injection increased the incidence of laying and sickness behavior. The Poly(I:C) challenge decreased the incidence of locomotor behaviors and activity levels. Pigs exposed to MIA had lower rates of social behaviors such as playing. The combined effect of PRRSV-elicited MIA and Poly(I:C) immune challenge further sensitized the pigs to behavior disruption across sexes including changes in sternal and lateral laying, walking, lethargy, and touching incidence. Notably, the effects of Poly(I:C) immune challenge alone on behaviors tended to be more extreme in males, whereas the effects of Poly(I:C) following MIA tended to be more extreme in females. Our findings demonstrate that MIA and Poly(I:C) affected behaviors, and the viral mimetic effects shortly after injection can offer insights into the prolonged effect of postnatal viral infections on feeding, social interactions and health status. Management practices that reduce the likelihood of gestational diseases and accommodate for behavioral disruptions in the offspring can minimize the impact of MIA.
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Affiliation(s)
- Haley E Rymut
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Courtni R Bolt
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Megan P Caputo
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Alexandra K Houser
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Adrienne M Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Jalisa D Zimmerman
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Maria B Villamil
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Laurie A Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Sandra L Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,C. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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10
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Antonson AM, Evans MV, Galley JD, Chen HJ, Rajasekera TA, Lammers SM, Hale VL, Bailey MT, Gur TL. Unique maternal immune and functional microbial profiles during prenatal stress. Sci Rep 2020; 10:20288. [PMID: 33219314 PMCID: PMC7679384 DOI: 10.1038/s41598-020-77265-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/14/2020] [Indexed: 12/22/2022] Open
Abstract
Maternal stress during pregnancy is widespread and is associated with poor offspring outcomes, including long-term mental health issues. Prenatal stress-induced fetal neuroinflammation is thought to underlie aberrant neurodevelopment and to derive from a disruption in intrauterine immune homeostasis, though the exact origins are incompletely defined. We aimed to identify divergent immune and microbial metagenome profiles of stressed gestating mice that may trigger detrimental inflammatory signaling at the maternal-fetal interface. In response to stress, maternal glucocorticoid circuit activation corresponded with indicators of systemic immunosuppression. At the maternal-fetal interface, density of placental mononuclear leukocytes decreased with stress, yet maternal whole blood leukocyte analysis indicated monocytosis and classical M1 phenotypic shifts. Genome-resolved microbial metagenomic analyses revealed reductions in genes, microbial strains, and metabolic pathways in stressed dams that are primarily associated with pro-inflammatory function. In particular, disrupted Parasutterella excrementihominis appears to be integral to inflammatory and metabolic dysregulation during prenatal stress. Overall, these perturbations in maternal immunological and microbial regulation during pregnancy may displace immune equilibrium at the maternal-fetal interface. Notably, the absence of and reduction in overt maternal inflammation during stress indicates that the signaling patterns driving fetal outcomes in this context are more nuanced and complex than originally anticipated.
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Affiliation(s)
- Adrienne M Antonson
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Biosciences Division, College of Dentistry, The Ohio State University, Columbus, OH, USA
| | - Morgan V Evans
- Environmental Health Sciences Division, College of Public Health, The Ohio State University, Columbus, OH, USA
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Jeffrey D Galley
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Helen J Chen
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Medical Scientist Training Program, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Therese A Rajasekera
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Environmental Health Sciences Division, College of Public Health, The Ohio State University, Columbus, OH, USA
| | - Sydney M Lammers
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Barnes Medical Student Research Scholarship Program, College of Medicine, The Ohio State University, Columbus, OH, USA
| | - Vanessa L Hale
- Department of Veterinary Preventive Medicine, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
| | - Michael T Bailey
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA
- Biosciences Division, College of Dentistry, The Ohio State University, Columbus, OH, USA
- Center for Microbial Pathogenesis, The Research Institute, Nationwide Children's Hospital, Columbus, OH, USA
- Department of Pediatrics, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Tamar L Gur
- Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
- Department of Psychiatry & Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
- Medical Scientist Training Program, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH, USA.
- Department of Obstetrics & Gynecology, The Ohio State University Wexner Medical Center, 120A Institute for Behavioral Medicine Research Building, 460 Medical Center Drive, Columbus, OH, 43210, USA.
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11
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Keever MR, Zhang P, Bolt CR, Antonson AM, Rymut HE, Caputo MP, Houser AK, Hernandez AG, Southey BR, Rund LA, Johnson RW, Rodriguez-Zas SL. Lasting and Sex-Dependent Impact of Maternal Immune Activation on Molecular Pathways of the Amygdala. Front Neurosci 2020; 14:774. [PMID: 32848554 PMCID: PMC7431923 DOI: 10.3389/fnins.2020.00774] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 07/01/2020] [Indexed: 12/23/2022] Open
Abstract
The prolonged and sex-dependent impact of maternal immune activation (MIA) during gestation on the molecular pathways of the amygdala, a brain region that influences social, emotional, and other behaviors, is only partially understood. To address this gap, we investigated the effects of viral-elicited MIA during gestation on the amygdala transcriptome of pigs, a species of high molecular and developmental homology to humans. Gene expression levels were measured using RNA-Seq on the amygdala for 3-week-old female and male offspring from MIA and control groups. Among the 403 genes that exhibited significant MIA effect, a prevalence of differentially expressed genes annotated to the neuroactive ligand-receptor pathway, glutamatergic functions, neuropeptide systems, and cilium morphogenesis were uncovered. Genes in these categories included corticotropin-releasing hormone receptor 2, glutamate metabotropic receptor 4, glycoprotein hormones, alpha polypeptide, parathyroid hormone 1 receptor, vasointestinal peptide receptor 2, neurotensin, proenkephalin, and gastrin-releasing peptide. These categories and genes have been associated with the MIA-related human neurodevelopmental disorders, including schizophrenia and autism spectrum disorders. Gene network reconstruction highlighted differential vulnerability to MIA effects between sexes. Our results advance the understanding necessary for the development of multifactorial therapies targeting immune modulation and neurochemical dysfunction that can ameliorate the effects of MIA on offspring behavior later in life.
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Affiliation(s)
- Marissa R Keever
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Pan Zhang
- Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Courtni R Bolt
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Adrienne M Antonson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Haley E Rymut
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Megan P Caputo
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Alexandra K Houser
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Alvaro G Hernandez
- High-throughput Sequencing and Genotyping Unit, Roy J. Carver Biotechnology Center, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Bruce R Southey
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Laurie A Rund
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Sandra L Rodriguez-Zas
- Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Illinois Informatics Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Neuroscience Program, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Department of Statistics, University of Illinois at Urbana-Champaign, Urbana, IL, United States.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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12
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Chen HJ, Antonson AM, Rajasekera TA, Patterson JM, Bailey MT, Gur TL. Prenatal stress causes intrauterine inflammation and serotonergic dysfunction, and long-term behavioral deficits through microbe- and CCL2-dependent mechanisms. Transl Psychiatry 2020; 10:191. [PMID: 32546752 PMCID: PMC7297973 DOI: 10.1038/s41398-020-00876-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/19/2020] [Accepted: 05/28/2020] [Indexed: 12/11/2022] Open
Abstract
Prenatal stress (PNS) is associated with neuropsychiatric disorders in offspring, including anxiety, depression, and autism spectrum disorders. There is mounting evidence that these behavioral phenotypes have origins in utero. Maternal microbes, inflammation, and serotonergic dysfunction have been implicated as potential mediators of the behavioral consequences of PNS; whether and how these systems interact is unclear. Here, we examine the effects of PNS in utero using late-gestation maternal restraint stress in wild-type (WT), germ-free (GF), and CCL2-/- genetic knock-out (KO) mice. In WT mice, PNS leads to placental and fetal brain inflammation, including an elevation in the chemokine CCL2. This inflammation is largely absent in GF mice, indicating the critical role of maternal microbes in mediating immune processes in utero. Furthermore, PNS in the absence of CCL2 failed to increase pro-inflammatory cytokine IL-6 in the fetal brain. PNS offspring also exhibited deficits in sociability and anxiety-like behavior that were absent in CCL2-/- PNS offspring. Tryptophan and serotonin (5-HT) were elevated in the WT PNS placenta, but not in CCL2-/- and GF animals. Altogether, these findings suggest that a complex interaction between maternal microbes, inflammation, and serotonin metabolism regulates the emergence of behavioral abnormalities following PNS.
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Affiliation(s)
- Helen J. Chen
- grid.412332.50000 0001 1545 0811Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Adrienne M. Antonson
- grid.412332.50000 0001 1545 0811Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.261331.40000 0001 2285 7943Biosciences Division, College of Dentistry, The Ohio State University, Columbus, OH USA
| | - Therese A. Rajasekera
- grid.412332.50000 0001 1545 0811Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.261331.40000 0001 2285 7943Environmental Health Sciences Division, College of Public Health, The Ohio State University, Columbus, OH USA
| | - Jenna M. Patterson
- grid.412332.50000 0001 1545 0811Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Michael T. Bailey
- grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.261331.40000 0001 2285 7943Biosciences Division, College of Dentistry, The Ohio State University, Columbus, OH USA ,grid.240344.50000 0004 0392 3476Center for Microbial Pathogenesis, The Research Institute, Nationwide Children’s Hospital, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Pediatrics, The Ohio State University Wexner Medical Center, Columbus, OH USA
| | - Tamar L. Gur
- grid.412332.50000 0001 1545 0811Department of Psychiatry and Behavioral Health, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Institute for Behavioral Medicine Research, The Ohio State University Wexner Medical Center, Columbus, OH USA ,grid.412332.50000 0001 1545 0811Obstetrics and Gynecology, The Ohio State University Wexner Medical Center, Columbus, OH USA
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13
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Antonson AM, Balakrishnan B, Radlowski EC, Petr G, Johnson RW. Altered Hippocampal Gene Expression and Morphology in Fetal Piglets following Maternal Respiratory Viral Infection. Dev Neurosci 2018. [PMID: 29539630 DOI: 10.1159/000486850] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Maternal infection during pregnancy increases the risk of neurobehavioral problems in offspring. Evidence from rodent models indicates that the maternal immune response to infection can alter fetal brain development, particularly in the hippocampus. However, information on the effects of maternal viral infection on fetal brain development in gyrencephalic species is limited. Thus, the objective of this study was to assess several effects of maternal viral infection in the last one-third of gestation on hippocampal gene expression and development in fetal piglets. Pregnant gilts were inoculated with porcine reproductive and respiratory syndrome virus (PRRSV) at gestational day (GD) 76 and the fetuses were removed by cesarean section at GD 111 (3 days before anticipated parturition). The gilts infected with PRRSV had elevated plasma interleukin-6 levels and developed transient febrile and anorectic responses lasting approximately 21 days. Despite having a similar overall body weight, fetuses from the PRRSV-infected gilts had a decreased brain weight and altered hippocampal gene expression compared to fetuses from control gilts. Notably, maternal infection caused a reduction in estimated neuronal numbers in the fetal dentate gyrus and subiculum. The number of proliferative Ki-67+ cells was not altered, but the relative integrated density of GFAP+ staining was increased, in addition to an increase in GFAP gene expression, indicating astrocyte-specific gliosis. Maternal viral infection caused an increase in fetal hippocampal gene expression of the inflammatory cytokines TNF-α and IFN-γ and the myelination marker myelin basic protein. MHCII protein, a classic monocyte activation marker, was reduced in microglia, while expression of the MHCII gene was decreased in hippocampal tissue of the fetuses from PRRSV-infected gilts. Together, these data suggest that maternal viral infection at the beginning of the last trimester results in a reduction in fetal hippocampal neurons that is evident 5 weeks after infection, when fetal piglets are near full term. The neuronal reduction was not accompanied by pronounced neuroinflammation at GD 111, indicating that any activation of classic neuroinflammatory pathways by maternal viral infection, if present, is mostly resolved by parturition.
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Affiliation(s)
- Adrienne M Antonson
- Department of Animal Sciences, Laboratory of Integrative Immunology and Behavior, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
| | - Bindu Balakrishnan
- Department of Animal Sciences, Laboratory of Integrative Immunology and Behavior, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
| | - Emily C Radlowski
- Department of Animal Sciences, Laboratory of Integrative Immunology and Behavior, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
| | - Geraldine Petr
- Department of Animal Sciences, Laboratory of Integrative Immunology and Behavior, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
| | - Rodney W Johnson
- Department of Animal Sciences, Laboratory of Integrative Immunology and Behavior, University of Illinois Urbana-Champaign, Urbana, Illinois, USA.,Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, Illinois, USA.,Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, Illinois, USA
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14
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Antonson AM, Radlowski EC, Lawson MA, Rytych JL, Johnson RW. Maternal viral infection during pregnancy elicits anti-social behavior in neonatal piglet offspring independent of postnatal microglial cell activation. Brain Behav Immun 2017; 59:300-312. [PMID: 27650113 DOI: 10.1016/j.bbi.2016.09.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/31/2016] [Accepted: 09/16/2016] [Indexed: 02/03/2023] Open
Abstract
Maternal infection during pregnancy increases risk for neurodevelopmental disorders and reduced stress resilience in offspring, but the mechanisms are not fully understood. We hypothesized that piglets born from gilts infected with a respiratory virus during late gestation would exhibit aberrant microglia activity, cognitive deficits and reduced sociability. Pregnant gilts were inoculated with porcine reproductive and respiratory syndrome virus (PRRSV; 5×105 TCID50 of live PRRSV) or saline at gestational day 76. Gilts infected with PRRSV exhibited fever (p<0.01) and reduced appetite (p<0.001) for 2weekspost-inoculation and were PRRSV-positive at parturition. Piglets born from infected and control gilts were weaned at postnatal day (PD) 1 and assigned to two groups. Group 1 was challenged with lipopolysaccharide (LPS, 5μg/kg body weight i.p.) or saline on PD 14 and tissues were collected. Group 2 was tested in a T-maze task to assess spatial learning and in a 3-chamber arena with unfamiliar conspecifics to assess social behavior from PD 14-27. Microglia (CD11b+ CD45low) isolated from Group 2 piglets at PD 28 were challenged ex vivo with LPS; a subset of cells was analyzed for MHCII expression. Maternal infection did not affect offspring circulating TNFα, IL-10, or cortisol levels basally or 4h post-LPS challenge. While performance in the T-maze task was not affected by maternal infection, both sociability and preference for social novelty were decreased in piglets from infected gilts. There was no effect of maternal infection on microglial MHCII expression or LPS-induced cytokine production. Taken together, these results suggest the reduced social behavior elicited by maternal infection is not due to aberrant microglia activity postnatally.
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Affiliation(s)
- Adrienne M Antonson
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA; Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Emily C Radlowski
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA; Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Marcus A Lawson
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA; Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, USA; Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Jennifer L Rytych
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA; Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, USA
| | - Rodney W Johnson
- Department of Animal Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA; Integrative Immunology and Behavior Program, University of Illinois Urbana-Champaign, Urbana, IL, USA; Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, USA; Division of Nutritional Sciences, University of Illinois Urbana-Champaign, Urbana, IL, USA.
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