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Kamens HM, Anziano EK, Horton WJ, Cavigelli SA. Chronic Adolescent Restraint Stress Downregulates miRNA-200a Expression in Male and Female C57BL/6J and BALB/cJ Mice. Genes (Basel) 2024; 15:873. [PMID: 39062652 PMCID: PMC11275362 DOI: 10.3390/genes15070873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/20/2024] [Accepted: 06/30/2024] [Indexed: 07/28/2024] Open
Abstract
Adolescence is a critical developmental period when the brain is plastic, and stress exposure can have lasting physiological consequences. One mechanism through which adolescent stress may have lasting effects is by altering microRNAs (miRNAs), leading to wide-scale gene expression changes. Three prior independent studies used unbiased approaches (RNA sequencing or microarray) to identify miRNAs differentially expressed by chronic variable stress in male rodents. In all three studies, miRNA-200a was differentially expressed in areas of the brain associated with emotion regulation. The current study extends this research to determine if chronic non-variable adolescent stress downregulates miRNA-200a expression by looking at two strains (BALB/cJ and C57BL/6J) of male and female mice. We utilized a 14-day (2 h/day) restraint stress protocol and verified stress effects on adolescent body weight gain and circulating corticosterone concentrations relative to non-restraint controls. Mice were then left undisturbed until they were euthanized in adulthood, at which time brains were collected to measure miRNA-200a in the ventral hippocampus. Three weeks after adolescent stress ended, differences in body weight between groups were no longer significant; however, animals exposed to stress had less miRNA-200a expression in the ventral hippocampus than control animals. These data implicate miRNA-200a expression as a potential mechanism by which adolescent stress can have persistent impacts on multiple outcomes in both male and female mice.
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Affiliation(s)
- Helen M. Kamens
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA 16801, USA (W.J.H.); (S.A.C.)
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Houdelet C, Blondeau-Bidet E, Mialhe X, Lallement S, Devilliers S, Falguière JC, Geffroy B. Plasma cortisol and production of miRNAs in red drum (Sciaenops ocellatus) exposed to three distinct challenges. FISH PHYSIOLOGY AND BIOCHEMISTRY 2024; 50:757-766. [PMID: 38265685 DOI: 10.1007/s10695-024-01304-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 01/16/2024] [Indexed: 01/25/2024]
Abstract
The red drum Sciaenops ocellatus is a marine fish species of high commercial interest. Despite improvements in current aquaculture practices, there are still concerns about the impact of daily manipulations regarding fish welfare. To investigate how does fish respond to various challenges, S. ocellatus juveniles were submitted to two acute challenges, namely a confinement stress and a cold-temperature shock, as well as a chronic stress challenge consisting of 18 days of repetitive challenge events. The level of cortisol produced by individuals was used as a measure of activation hypothalamic-pituitary-interrenal (HPI) axis. A significant increase in cortisol levels was detected only after the confinement stress. Interestingly, the fish exposed to a chronic stress for 18 days exhibited cortisol levels significantly lower than those of non-challenged fish. The small RNA-sequencing conducted for the chronic stress experiment only allowed us to identify two plasmatic microRNAs more abundant in non-challenged fish (miR-205-1-5p and let-7b-5p) compared to challenged fish. The miR-205-1-5p was of particular interest since it was already detected in previous studies on other fish species. In silico analysis allowed to predict potentially highly conserved mRNA targets of this specific miRNA, among which is tnfrsfa that plays a key role in the secondary stress response.
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Affiliation(s)
- Camille Houdelet
- MARBEC Univ Montpellier, CNRS, Ifremer, IRD, Palavas-Les-Flots, France.
| | | | - Xavier Mialhe
- MGX-Montpellier GenomiX, Institut de Génomique Fonctionnelle, Montpellier, France
| | | | - Samson Devilliers
- Délégation IFREMER Des Antilles, Unité Biodiversité Et Environnement, 79, Route de Pointe-Fort, 97231, Le Robert, Martinique, France
| | - Jean-Claude Falguière
- Délégation IFREMER Des Antilles, Unité Biodiversité Et Environnement, 79, Route de Pointe-Fort, 97231, Le Robert, Martinique, France
| | - Benjamin Geffroy
- MARBEC Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
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