ArticleJournal of psychiatry & neuroscience : JPN2021
Elevated activity in the dorsal dentate gyrus reduces expression of fear memory after fear extinction training.
Article in Journal of psychiatry & neuroscience : JPN, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 13 citations in OpenAlex.
- Molecular pathways underlying amyloid precursor protein-mediated regulation of adult-born neurons.Neural regeneration research · 2026Article
- Magnetic resonance microscopy maps widespread effects of Alzheimer's disease on brain structures and behavior in mice.Nature neuroscience · 2026Article
- DNA methylation regulates the extinction of fear memory.World journal of psychiatry · 2025Article
- Not the same as it ever was: A review of memory modification, updating, and distortion in humans and rodents.Neuroscience and biobehavioral reviews · 2025Review
- Pentoxifylline Prevents Neuroinflammation and Modifies PTEN/TrkB Signaling in an LPS-Induced Depression Model.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2025Article
- Prelimbic cortex is involved in the regulation of morphine-induced conditioned place preference in both resistant and sensitive mice.Scientific reports · 2025Article
- Engrams of Fear Memory Attenuation.Advances in neurobiology · 2024Review
- Neurogenic Interventions for Fear Memory via Modulation of the Hippocampal Function and Neural Circuits.International journal of molecular sciences · 2022Review
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Effectively reducing the expression of certain aversive memories (fear or trauma memories) with extinction training is generally viewed to be therapeutically important. A deeper understanding of the biological basis for a more effective extinction process is also of high scientific importance. Methods: Our study involved intraventricular injection or local injection into the dorsal dentate gyrus of anti-neuregulin 1 antibodies (anti-NRG1) before fear extinction training, followed by testing the expression of fear memory 24 hours afterward or 9 days later. We used local injection of chemogenetic or optogenetic viruses into the dorsal dentate gyrus to manipulate the activity of the dorsal dentate gyrus and test the expression of fear memory. We also examined the effect of deep brain stimulation in the dorsal dentate gyrus on the expression of fear memory. Results: Mice that received intraventricular injection with anti-NRG1 antibodies exhibited lower expression of fear memory and increased density of activated excitatory neurons in the dorsal dentate gyrus. Injection of anti-NRG1 antibodies directly into the dorsal dentate gyrus also led to lower expression of fear memory and more activated neurons in the dorsal dentate gyrus. Inhibiting the activity of dorsal dentate gyrus excitatory neurons using an inhibitory designer receptor exclusively activated by designer drugs (DREADD) eliminated the effects of the anti-NRG1 antibodies. Enhancing the activity of the dorsal dentate gyrus with an excitatory DREADD or optogenetic stimulation resulted in lower expression of fear memory in mice that did not receive infusion of anti-NRG1 antibodies. Deep brain stimulation in the dorsal dentate gyrus effectively suppressed expression of fear memory, both during and after fear extinction training. Limitations: The mechanism for the contribution of the dorsal dentate gyrus to the expression of fear memory needs further exploration. Conclusion: Activation of the dorsal dentate gyrus may play an important role in modulating the expression of fear memory; its potential use in fear memory extinction is worthy of further exploration.
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