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Comprehensive analysis of circRNA expression and circRNA-miRNA-mRNA networks in the ventral hippocampus of the rat: impact of chronic stress and biological sex

dc.contributor.authorSilva, Juan Pablo
dc.contributor.authorCorrales, Wladimir A.
dc.contributor.authorCatalán, Julia
dc.contributor.authorOlave, Felipe A.
dc.contributor.authorGonzález-Mori, Pablo I.
dc.contributor.authorAlarcón, Matías
dc.contributor.authorGuarnieri, Tatiana
dc.contributor.authorAliaga, Esteban
dc.contributor.authorMaracaja-Coutinho, Vinicius
dc.contributor.authorFiedler, Jenny L.
dc.date.accessioned2025-07-04T17:56:06Z
dc.date.available2025-07-04T17:56:06Z
dc.date.issued2025
dc.identifier.urihttp://repositorio.ucm.cl/handle/ucm/6176
dc.description.abstractThis study provides new insights into how sex and chronic stress influence circRNA expression in the rat ventral hippocampus, a region critical for emotional processing. We identified 206 sex-biased circRNAs and 194 stress-responsive circRNAs, highlighting distinct expression profiles. Parental genes of male circRNAs were primarily enriched in synaptic transmission pathways, while those of female circRNAs were associated with axon guidance, emphasizing sex-specific molecular differences. Chronic stress also triggered miRNA changes unique to each sex, revealing divergent regulatory mechanisms. The identified circRNA-miRNA-mRNA axes, modulated under stress, appear to regulate the translation of numerous potential mRNA targets. In males, stress positively regulated neuroprotective pathways, suggesting a compensatory response to mitigate stress-induced damage. In contrast, females exhibited a broader translational network that favored mRNA expression without distinct pathway-specific actions. However, the smaller repressed network in females─characterized by a higher circRNA-to-miRNA and mRNA ratio─may indicate a more selective and targeted regulatory mechanism, with many interactions linked to anti-inflammatory processes. Coexpression analysis revealed two male-specific modules with altered activity under stress. These were associated with processes such as reticulum stress and actin dynamics, the latter linked to dendritic spine loss and depressive-like behaviors, extensively documented in chronically stressed male rats. Conversely, females displayed an activated stress-responsive module, promoting axon guidance and long-term potentiation, which may contribute to improved cognitive outcomes. Among the identified circRNAs, rno-Gabrg3_0001 emerged as stress-sensitive in males. This circRNA exhibited predicted miRNA binding sites and interactions with proteins involved in vesicle trafficking, forming part of a highly active module enriched in genes related to ion transport and membrane protein localization. Overall, these findings uncover sex-dependent regulatory mechanisms driving transcriptomic changes under chronic stress, deepening our understanding of ventral hippocampal molecular functions. Investigating these regulatory networks, which differentially affect the male and female ventral hippocampus, could inform the development of sex-specific therapeutic strategies for stress-related disorders.es_CL
dc.language.isoenes_CL
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/*
dc.sourceACS Chemical Neuroscience, 16(9), 1720-1737es_CL
dc.subjectChronic restraint stresses_CL
dc.subjectVentral hippocampuses_CL
dc.subjectSexes_CL
dc.subjectTranscriptomicses_CL
dc.subjectCircRNAses_CL
dc.subjectMiRNAses_CL
dc.titleComprehensive analysis of circRNA expression and circRNA-miRNA-mRNA networks in the ventral hippocampus of the rat: impact of chronic stress and biological sexes_CL
dc.typeArticlees_CL
dc.ucm.facultadFacultad de Ciencias de la Saludes_CL
dc.ucm.indexacionScopuses_CL
dc.ucm.indexacionIsies_CL
dc.ucm.uripubs.acs.org/doi/10.1021/acschemneuro.4c00681es_CL
dc.ucm.doidoi.org/10.1021/acschemneuro.4c00681es_CL


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Atribución-NoComercial-SinDerivadas 3.0 Chile
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