Oxytocin Restores Social Memory in Two Different Autism Mouse Models Through a Specific Brain Region
Activating oxytocin receptor neurons in the lateral septum restored social novelty recognition in both genetic and environmental autism mouse models.
Quick Facts
What This Study Found
Two different autism spectrum disorder (ASD) mouse models were used. One was created by prenatal valproic acid exposure (environmental cause), the other by the Nl3R451C genetic mutation (genetic cause). Both had impaired social memory, the ability to distinguish familiar from novel mice.
Selectively expressing hM3Dq (an activating DREADD receptor) in oxytocin receptor-positive (OXTR+) neurons in the lateral septum (LS) allowed researchers to activate these specific neurons with a chemical trigger.
In the valproic acid model, activation restored social memory in the three-chamber social test. In the Nl3R451C model, social memory was restored in a single-field test. Both represent core ASD symptoms.
The OXTR+ neurons in the LS project to the CA1 region of the hippocampus, suggesting social memory depends on an oxytocin-responsive circuit from the lateral septum to the hippocampus. This identifies a specific neural pathway that could explain how intranasal oxytocin therapy improves social symptoms in ASD patients.
Key Numbers
2 ASD models; OXTR+ LS neurons; social memory restored; LS→CA1 projection; DREADDs used
How They Did This
Neuroscience study using two mouse models of ASD. DREADDs (designer receptors exclusively activated by designer drugs) were virally expressed in OXTR+ neurons of the lateral septum. Social memory was tested before and after neuron activation. Neural projection mapping confirmed LS-to-CA1 connectivity.
Why This Research Matters
Oxytocin nasal spray has shown promise in ASD clinical trials, but nobody knew exactly where in the brain it works. This study identifies the lateral septum's OXTR+ neurons as a critical node. Targeting this specific circuit could lead to more precise therapies for the social symptoms of autism.
The Bigger Picture
Oxytocin nasal spray has shown promise in ASD clinical trials, but nobody knew where in the brain it works. Identifying the lateral septum's OXTR+ neurons as a critical node could guide more targeted therapies and help predict which patients will respond.
What This Study Doesn't Tell Us
Mouse models of autism have limited translational validity. The social behaviors tested are simplified proxies for human social cognition. DREADDs provide proof of concept but are not a practical therapy. The two mouse models represent only a fraction of ASD causes. Whether the LS-CA1 circuit functions the same way in the human brain is unknown.
Questions This Raises
- ?Can the lateral septum be specifically targeted by intranasal oxytocin in humans?
- ?Does this circuit also mediate other social behaviors impaired in ASD?
- ?Would human fMRI studies show lateral septum activation correlating with oxytocin response?
Trust & Context
- Key Stat:
- 2 ASD models restored activating oxytocin receptor neurons in the lateral septum recovered social memory in both genetic and environmental autism models
- Evidence Grade:
- Moderate evidence from well-designed animal neuroscience experiments. The circuit is convincingly mapped, but mouse social behavior has limited translation to human ASD.
- Study Age:
- Published in 2020. Oxytocin for ASD remains under active clinical investigation with mixed human trial results.
- Original Title:
- Targeting oxytocin receptor (Oxtr)-expressing neurons in the lateral septum to restore social novelty in autism spectrum disorder mouse models.
- Published In:
- Scientific reports, 10(1), 22173 (2020)
- Authors:
- Horiai, Machi, Otsuka, Ayano, Hidema, Shizu, Hiraoka, Yuichi, Hayashi, Ryotaro, Miyazaki, Shinji, Furuse, Tamio, Mizukami, Hiroaki, Teruyama, Ryoichi, Tamura, Masaru, Bito, Haruhiko, Maejima, Yuko, Shimomura, Kenju, Nishimori, Katsuhiko
- Database ID:
- RPEP-04859
Evidence Hierarchy
Frequently Asked Questions
How does oxytocin help with autism?
This study shows oxytocin activates specific neurons in the lateral septum that connect to memory circuits. These neurons help the brain recognize social novelty — a core social function impaired in autism.
Could this lead to better autism treatments?
Possibly. Knowing exactly which brain region to target could help design more effective oxytocin delivery methods or identify which ASD patients are most likely to benefit from oxytocin therapy.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-04859APA
Horiai, Machi; Otsuka, Ayano; Hidema, Shizu; Hiraoka, Yuichi; Hayashi, Ryotaro; Miyazaki, Shinji; Furuse, Tamio; Mizukami, Hiroaki; Teruyama, Ryoichi; Tamura, Masaru; Bito, Haruhiko; Maejima, Yuko; Shimomura, Kenju; Nishimori, Katsuhiko. (2020). Targeting oxytocin receptor (Oxtr)-expressing neurons in the lateral septum to restore social novelty in autism spectrum disorder mouse models.. Scientific reports, 10(1), 22173. https://doi.org/10.1038/s41598-020-79109-0
MLA
Horiai, Machi, et al. "Targeting oxytocin receptor (Oxtr)-expressing neurons in the lateral septum to restore social novelty in autism spectrum disorder mouse models.." Scientific reports, 2020. https://doi.org/10.1038/s41598-020-79109-0
RethinkPeptides
RethinkPeptides Research Database. "Targeting oxytocin receptor (Oxtr)-expressing neurons in the..." RPEP-04859. Retrieved from https://rethinkpeptides.com/research/horiai-2020-targeting-oxytocin-receptor-oxtrexpressing
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Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.