Abstract:
:Disruption of persistent, stress-associated memories is relevant for treating posttraumatic stress disorder (PTSD) and related syndromes, which develop in a subset of individuals following a traumatic event. We previously developed a stress-enhanced fear learning (SEFL) paradigm in inbred mice that produces PTSD-like characteristics in a subset of mice, including persistently enhanced memory and heightened cFos in the basolateral amygdala complex (BLC) with retrieval of the remote (30-day-old) stress memory. Here, the contribution of BLC microRNAs (miRNAs) to stress-enhanced memory was investigated because of the molecular complexity they achieve through their ability to regulate multiple targets simultaneously. We performed small-RNA sequencing (smRNA-Seq) and quantitative proteomics on BLC tissue collected from mice 1 month after SEFL and identified persistently changed microRNAs, including mir-135b-5p, and proteins associated with PTSD-like heightened fear expression. Viral-mediated overexpression of mir-135b-5p in the BLC of stress-resilient animals enhanced remote fear memory expression and promoted spontaneous renewal 14 days after extinction. Conversely, inhibition of BLC mir-135b-5p in stress-susceptible animals had the opposite effect, promoting a resilient-like phenotype. mir-135b-5p is highly conserved across mammals and was detected in post mortem human amygdala, as well as human serum samples. The mir-135b passenger strand, mir-135b-3p, was significantly elevated in serum from PTSD military veterans, relative to combat-exposed control subjects. Thus, miR-135b-5p may be an important therapeutic target for dampening persistent, stress-enhanced memory and its passenger strand a potential biomarker for responsivity to a mir-135-based therapeutic.
journal_name
Mol Psychiatryjournal_title
Molecular psychiatryauthors
Sillivan SE,Jamieson S,de Nijs L,Jones M,Snijders C,Klengel T,Joseph NF,Krauskopf J,Kleinjans J,Vinkers CH,Boks MPM,Geuze E,Vermetten E,Berretta S,Ressler KJ,Rutten BPF,Rumbaugh G,Miller CAdoi
10.1038/s41380-019-0432-2subject
Has Abstractpub_date
2020-05-01 00:00:00pages
965-976issue
5eissn
1359-4184issn
1476-5578pii
10.1038/s41380-019-0432-2journal_volume
25pub_type
杂志文章abstract::Polyglutamine expansion (PGE) encoded by a CAG repeat underlies eight inherited neurodegenerative diseases, among which is Huntington's disease. CAG expansion has also been reported in schizophrenia, suggesting a role for PGE. To investigate the potential role of PGE as a candidate for schizophrenia, we searched for P...
journal_title:Molecular psychiatry
pub_type: 杂志文章
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,多中心研究
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pub_type: 已发布勘误
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pub_type: 杂志文章,已发布勘误
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pub_type: 临床试验,杂志文章
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pub_type: 临床试验,杂志文章,随机对照试验
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