Journal of Traditional Chinese Medicine ›› 2026, Vol. 46 ›› Issue (3): 552-560.DOI: 10.19852/j.cnki.jtcm.2026.03.003

• Original Articles • Previous Articles     Next Articles

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

LU Xiaoxiao1,2, XU Yipeng3, ZHOU Minjie3, ZHANG Chengshun3, CAI Dingjun3(), ZHAO Zhengyu3()   

  1. 1 Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
    2 Department of acupuncture and moxibustion, First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang 550001, China
    3 Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
  • Received:2025-02-12 Accepted:2025-07-22 Online:2026-06-15 Published:2026-06-08
  • Contact: ZHAO Zhengyu, CAI Dingjun, Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China. zhaozhengyu@cdutcm.edu.cn;
    CAI Dingjun, Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China. djcai@cdutcm.edu.cn, Telephone: +86-28-61703327
  • About author:First author contact:

    LU Xiaoxiao and XU Yipeng are co-first authors and contributed equally to this work

  • Supported by:
    National Natural Science Foundation of China: Mechanism Study on the Cholinergic-gamma-aminobutyric acid-ergic Neural Regulatory Effect of the Thalamic Reticular Nucleus in Acupuncture Regulating Sleep-Wake disturbance(81774434);Circadian-Controlled Microglia-Neuron Interactions Mechanism within the Thalamic Reticular Nucleus Underlying Acupuncture Amelioration of Insomnia-Induced Attention Deficits(82274659);Sichuan Province Science and Technology Program: Study on the Exosome-Mediated Mast Cell-Neural Modulation Mechanism Underlying Acupoint Sensitization(2019YJ0330);Circadian-Controlled Neuro-Immune Regulation Mechanism of Chrono-Acupuncture for Neuropathic Pain via SP-Mrgprb2R Pathway(2021YJ0177);Chengdu University of Traditional Chinese Medicine Foundation Program: Acupuncture Modulates Thalamic Reticular Nucleus Microglia-Neuronal Crosstalk in Sleep Disorder-Induced Attention Deficits(QJJJ2021005)

Abstract:

OBJECTIVE: To test whether acupuncture improves sleep by enhancing gamma-aminobutyric acid-ergic (GABA) neuronal activity in the thalamic reticular nucleus (TRN).

METHODS: We established an animal model using p-chlorophenylalanine (PCPA). We assessed the impact of acupuncture on insomnia through wheel-running activity and sodium pentobarbital-induced sleep tests. Subsequently, the calcium indicator GCaMP6m was injected into the TRN of Vgat-Cre mice, and the activity of GABA neurons in the TRN was analyzed before and after acupuncture using fiber photometry recording. Additionally, cortical electroencephalography (EEG) recordings were compared between groups following chemogenetic inhibition of GABA neurons in the TRN.

RESULTS: Following acupuncture, we observed a reduction in sleep latency and an increase in sleep duration in comparison to the PCPA-induced insomnia (P < 0.01). Furthermore, acupuncture positively influenced the diurnal phase of insomnia (P < 0.01). Ca2+ signals in GABA neurons within the TRN increased post-acupuncture (paired t-test, P< 0.01). Acupuncture also reduced the proportion of EEG power in the elevated Beta and Gamma frequencies associated with PCPA injection, while simultaneously increasing the Delta power ratio (P < 0.01). Chemogenetic inhibition of TRN GABA neurons blocked these acupuncture effects: the hM4Di + MA group showed no significant differences from the PCPA group in Beta and Gamma power, but exhibited elevated Beta and Theta activity compared to controls (P < 0.05).

CONCLUSIONS: Acupuncture activates GABA neurons in the TRN, thereby regulating the sleep-wake cycle in the context of PCPA-induced insomnia.

Key words: acupuncture, insomnia disorder, sleep, wake, thalamic reticular nucleus, gamma-aminobutyric acid-ergic neurons

Cite this article

LU Xiaoxiao, XU Yipeng, ZHOU Minjie, ZHANG Chengshun, CAI Dingjun, ZHAO Zhengyu. Role of gamma-aminobutyric acid-ergic neurons in the thalamic reticular nucleus in regulating sleep-wake cycles in mice treated with acupuncture for insomnia[J]. Journal of Traditional Chinese Medicine, 2026, 46(3): 552-560.