Cited by 56Treatment of Major DepressionStress Responses and CortisolNeuroscience and Neuropharmacology Research

Role of Fto on CaMKII/CREB signaling pathway of hippocampus in depressive-like behaviors induced by chronic restraint stress mice

Shen, Jun, Yang, Lu, Wei, Wenshi·2021·Behavioural Brain Research

Abstract

Background Major depressive disorders (MDD) is one of the most common mental illness in the world. Recently, brain m 6 A /m (fat mass- and obesity-associated gene Fto) was found that exerted an important role in regulating gene expression involved in stress related depression. However, the potential mechanism of Fto on depression still remains elusive. This study investigated the role of Fto and its downstream signaling pathway in hippocampus on chronic restraint stress induced depressive-like behaviors.Methods C57BL/6 mice weighing 20-22 g were randomly divided into 4 groups (Control, Control + Fto-ov, Stress, Stress + Fto-ov). Mice were exposed to chronic restraint stress for 3 consecutive weeks to induce depression model. Mice in the Fto-ov groups were stereotaxic injected with Recombinant Adeno-associated Virus lentivirus (Fto) in hippocampus followed by stress procedure. Depressive-like behaviors were detected after stress procedure. Western blot was used to test hippocampal Fto, p-CaMKII and p-CREB expression. Post synaptic density protein 95 (PSD95) and synaptophysin levels were detected by PCR. Golgi-Cox staining was used to appraise dendritic spine density and branches. Synaptic morphology in hippocampus was determined by electron microscopy.Results We demonstrated that chronic restraint stress induced depressive-like behaviors, decreased protein expression of Fto, p-CaMKII and p-CREB, reduced levels of synaptic plasticity markers (synaptophysin and PSD95) in hippocampus. Moreover, chronic restraint stress led to synaptic morphology alterations (reduced dendritic spine density and number of branches; thinned postsynaptic density). However, these molecules changes and morphology alterations were reversed by stereotaxic injected recombinant adeno-associated Fto-overexpression virus in hippocampus.Conclusions This study found that the modulation of Fto on CaMKII/CREB signaling pathway plays a key role in hippocampal synaptic plasticity, and then ameliorated chronic restraint stress induced depressive-like behaviors.

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Crossref · 10.1016/j.bbr.2021.113227

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Authors
Shen, J., Yang, L., & Wei, W.
Affiliations
Fudan University (CN)
Corresponding author
Wei, Wenshi
Venue
Behavioural Brain Research
Publisher
Elsevier BV
Published
2021-05
Volume
406
Pages
113227
ISSN
0166-4328 (ISSN-L)
OpenAlex
W3135799194
Cited by
56
References
34
Citations by year
2026: 10 · 2025: 6 · 2024: 9 · 2023: 15 · 2022: 14 · 2021: 2
FWCI
5.86
Type
journal article
Language
en
Open access
closed
Locations
  • Behavioural Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
FTO, chronic restraint stress, depression, hippocampus, synaptic plasticity, dendritic spine density, PSD-95, synaptophysin, postsynaptic density, depression-like behavior
MeSH terms
Alpha-Ketoglutarate-Dependent Dioxygenase FTO, Animals, Behavior, Animal, Depression, Disease Models, Animal, Hippocampus, Male, Mice, Inbred C57BL, Neuronal Plasticity, Restraint, Physical, Stress, Psychological, Signal Transduction, CREB-Binding Protein, Mice, Calcium-Calmodulin-Dependent Protein Kinase Type 2

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