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Acupuncture activates GABA neurons in the thalamic reticular nucleus to regulate sleep-wake cycles in PCPA-induced insomnia in mice

Acupuncture reduced sleep latency and increased sleep duration in PCPA-induced insomnia mice (P < 0.01). It increased Ca2+ signals in GABA neurons within the TRN (paired t-test, P < 0.01) and shifted EEG power from elevated Beta/Gamma frequencies to increased Delta power (P < 0.01). Chemogenetic inhibition of TRN GABA neurons blocked these effects.

Last updated: Jul 8, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score24/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. Role of gamma-aminobutyric acid-ergic neurons in the thalamic reticular nucleus in regulating sleep-wake cycles in mice treated with acupuncture for insomnia.

observational

Xiaoxiao LU, Yipeng XU, Minjie Z, Chengshun Z, Dingjun C, Zhengyu Z · Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan (2026)

Participants: N/A
Duration: Not specified in abstract
Intervention: Acupuncture treatment in PCPA-induced insomnia mouse model
Outcome: Sleep latency, sleep duration, diurnal phase, Ca2+ signals in TRN GABA neurons, EEG power ratios (Delta, Beta, Gamma, Theta)
Effect Size: N/A
Population: Vgat-Cre mice with PCPA-induced insomnia

Result:

PubMed: 42365403DOI: 10.19852/j.cnki.jtcm.2026.03.003

Mechanism Graph

Acupuncture activates GABA neurons in the thalamic reticular nucleus (TRN)
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Increased Ca2+ signals in TRN GABA neurons
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Reduced elevated Beta and Gamma EEG power, increased Delta power
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Regulation of sleep-wake cycle and improvement of insomnia

Limitations

  • ⚠Animal model (mice) may not fully translate to human insomnia
  • ⚠PCPA-induced insomnia model may not represent all types of insomnia in humans

Frequently Asked Questions

What is the main finding of this study?▼

Acupuncture activates GABA neurons in the thalamic reticular nucleus, which helps regulate sleep-wake cycles and improves insomnia in a mouse model.

How was insomnia induced in the mice?▼

Insomnia was induced using p-chlorophenylalanine (PCPA), a compound that depletes serotonin and disrupts sleep.

What measurements were used to assess sleep improvement?▼

Wheel-running activity, sodium pentobarbital-induced sleep tests, fiber photometry for Ca2+ signals, and cortical EEG recordings were used.

What happened when GABA neurons in the TRN were inhibited?▼

Chemogenetic inhibition of TRN GABA neurons blocked the beneficial effects of acupuncture on EEG power, suggesting these neurons are essential for the treatment effect.

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References

  1. 1.Xiaoxiao LU, Yipeng XU, Minjie Z, Chengshun Z, Dingjun C, Zhengyu Z. "Role of gamma-aminobutyric acid-ergic neurons in the thalamic reticular nucleus in regulating sleep-wake cycles in mice treated with acupuncture for insomnia.." Journal of traditional Chinese medicine = Chung i tsa chih ying wen pan, 2026. PMID: 42365403 DOI: 10.19852/j.cnki.jtcm.2026.03.003
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.