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- Title
miR-483-5p offsets functional and behavioural effects of stress in male mice through synapse-targeted repression of Pgap2 in the basolateral amygdala.
- Authors
Mucha, Mariusz; Skrzypiec, Anna E.; Kolenchery, Jaison B.; Brambilla, Valentina; Patel, Satyam; Labrador-Ramos, Alberto; Kudla, Lucja; Murrall, Kathryn; Skene, Nathan; Dymicka-Piekarska, Violetta; Klejman, Agata; Przewlocki, Ryszard; Mosienko, Valentina; Pawlak, Robert
- Abstract
Severe psychological trauma triggers genetic, biochemical and morphological changes in amygdala neurons, which underpin the development of stress-induced behavioural abnormalities, such as high levels of anxiety. miRNAs are small, non-coding RNA fragments that orchestrate complex neuronal responses by simultaneous transcriptional/translational repression of multiple target genes. Here we show that miR-483-5p in the amygdala of male mice counterbalances the structural, functional and behavioural consequences of stress to promote a reduction in anxiety-like behaviour. Upon stress, miR-483-5p is upregulated in the synaptic compartment of amygdala neurons and directly represses three stress-associated genes: Pgap2, Gpx3 and Macf1. Upregulation of miR-483-5p leads to selective contraction of distal parts of the dendritic arbour and conversion of immature filopodia into mature, mushroom-like dendritic spines. Consistent with its role in reducing the stress response, upregulation of miR-483-5p in the basolateral amygdala produces a reduction in anxiety-like behaviour. Stress-induced neuromorphological and behavioural effects of miR-483-5p can be recapitulated by shRNA mediated suppression of Pgap2 and prevented by simultaneous overexpression of miR-483-5p-resistant Pgap2. Our results demonstrate that miR-483-5p is sufficient to confer a reduction in anxiety-like behaviour and point to miR-483-5p-mediated repression of Pgap2 as a critical cellular event offsetting the functional and behavioural consequences of psychological stress. The role of miRNAs in regulating brain stress response remains relatively unexplored. Here the authors show that miR-483-5p-mediated repression of Pgap2 in amygdala of male mice offsets the functional and behavioural consequences of stress.
- Subjects
AMYGDALOID body; PSYCHOLOGICAL stress; DENDRITIC spines; NON-coding RNA; MICE; EMOTIONAL trauma
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-37688-2