Abstract
Preclinical genetic studies have related stress early exposures with changes in gene regulatory mechanisms, including epigenetic alterations, such as modifications of DNA methylation, histone deacetylation, and histones acetylation. This study evaluates the effects of prenatal stress on the behavior, hypothalamus-pituitary-adrenal (HPA)-axis, and epigenetic parameters in stressed dams and their offspring. The rats were subjected to a protocol of chronic unpredictable mild stress on the fourteenth day of pregnancy until the birth of offspring. After birth, maternal care was evaluated for six days. Following weaning, the locomotor and depressive-like behaviors of the dams and their offspring (60 days old) were assessed. The HPA axis parameters were evaluated in serum from dams and offspring, and epigenetic parameters (histone acetyltransferase (HAT), histone deacetylase (HDAC), DNA methyltransferase (DNMT) activities, and the levels of histone H3 acetylated at lysine residue 9 (H3K9ac) and histone 3 acetylated at lysine residue 14 (H3K14ac)) were assessed in dams’ and offspring’ brains. Prenatal stress did not significantly influence maternal care; however, it induced manic behavior in female offspring. These behavioral alterations in the offspring were accompanied by hyperactivity of the HPA-axis, epigenetic adaptations in the activity of HDAC and DNMT, and acetylation in the histones H3K9 and H3K14. In addition, the prenatal stressed female offspring showed increased levels of ACTH compared to their male counterpart. Our findings reinforce the impact of prenatal stress on behavior, stress response, and epigenetic profile of offspring.
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Data Availability
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
Code Availability
Not applicable.
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Acknowledgments
We would like to acknowledge CNPq, CAPES, FAPESC and Instituto Cérebro e Mente for the support during the development of the present study.
Funding
Translational Psychiatry Program (USA) is funded by a grant from the National Institute of Health/National Institute of Mental Health (1R21MH117636-01A1, to JQ). Center of Excellence on Mood Disorders (USA) is funded by the Pat Rutherford Jr. Chair in Psychiatry, John S. Dunn Foundation and Anne and Don Fizer Foundation Endowment for Depression Research. Translational Psychiatry Laboratory (Brazil) is funded by grants from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina (FAPESC), and Instituto Cérebro e Mente. JQ, SSV, and AIZ are CNPq Research Fellows.
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Samira S. Valvassori, Alexandra I. Zugno, and João Quevedo contributed to design and development; methodological design; supervision (responsible for organizing and executing the project); analysis/interpretation and critical review. Gabriel R. Fries contribute to critical review. Taise Possamai-Della, Jorge M. Aguiar-Geraldo, Jefté Peper-Nascimento and José H. Cararo performed animal experimentation, statistical analyzes, contributed to the analysis/interpretation, literature survey, and writing.
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All experiments were approved by the local ethics committee Comissão de Ética no Uso de Animais (CEUA) from UNESC under protocol number 014/2018. In addition, we followed the Conselho Nacional de Controle de Experimentação Animal (CONCEA) recommendations for animal care.
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JQ received clinical research support from LivaNova; has speaker bureau membership with Myriad Neuroscience, Janssen Pharmaceuticals, and Abbvie; is consultant for Eurofarma; is stockholder at Instituto de Neurociencias Dr. Joao Quevedo; and receives copyrights from Artmed Editora, Artmed Panamericana, and Elsevier/Academic Press. All other authors have no conflicts of interest.
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Possamai-Della, T., Cararo, J.H., Aguiar-Geraldo, J.M. et al. Prenatal Stress Induces Long-Term Behavioral Sex-Dependent Changes in Rats Offspring: the Role of the HPA Axis and Epigenetics. Mol Neurobiol 60, 5013–5033 (2023). https://doi.org/10.1007/s12035-023-03348-1
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DOI: https://doi.org/10.1007/s12035-023-03348-1