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
LU Xiaoxiao1,2, XU Yipeng3, ZHOU Minjie3, ZHANG Chengshun3, CAI Dingjun3(
), ZHAO Zhengyu3(
)
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;About author:First author contact:LU Xiaoxiao and XU Yipeng are co-first authors and contributed equally to this work
Supported by: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.
Figure 1 PSIS and voluntary wheel running test results after acupuncture treatment A: effect of acupuncture on pentobarbital-induced sleep latency; B: effect of acupuncture on pentobarbital-induced sleep duration; C: acrophase of circadian rhythms; D: representative double-plotted actograms from the Control group; the x-axis represents circadian time; Y‑axis: successive days; lights were on at 07:00 and off at 19:00; the figure shows locomotor activity rhythms for each group; E: representative double-plotted actograms from the PCPA group; F: representative double-plotted actograms from the MA group. The control group received daily i.p. normal saline (10 mL/kg); the PCPA group received daily i.p. PCPA (300 mg/kg) for 3 d; the MA group received identical PCPA treatment followed by daily MA (20 min/session, 3 d). Group differences were analyzed by ANOVA with Tukey HSD post-hoc test. PSIS: pentobarbital sodium-induced sleep test; PCPA: p-chlorophenylalanine; MA: manual acupuncture; ANOVA: analysis of variance; HSD: honestly significant difference; SEM: standard error of the mean. Data are mean ± SEM (n = 6). Compared with the Control group, aP < 0.01; compared with the PCPA group, bP < 0.01.
Figure 2 Acupuncture-evoked activation of TRN GABA neurons A: virus injection for GCaMP6m expression in the TRN and post hoc brain slice validation; A1: schematic illustration of virus injection targeting the TRN in Vgat-Cre mice; A2: representative immunofluorescence image showing GCaMP6m expression (green) within the TRN, the scale bar represents 250 μm; B: representative heatmap displaying single-trial GCaMP6m fluorescence changes (Δf/f, %) across individual trials aligned to acupuncture stimulation onset; C: averaged calcium traces showing elevated GCaMP6m signals (red) following acupuncture compared to EGFP controls (blue). Fiber photometry recordings were performed during MA stimulation. TRN: thalamic reticular nucleus; GABA: gamma-aminobutyric acid-ergic; EGFP: expressing only green fluorescent protein; MA: manual acupuncture; SEM: standard error of the mean. Data are presented as mean ± SEM. Statistical analysis was performed using paired t-test comparing Δf/f values between baseline and MA stimulation in GCaMP6m expressing mice.
Figure 3 Chemogenetic inactivation of TRN GABA neurons and sleep-wake monitoring A: schematic diagram of the chemogenetic inactivation of TRN GABA neurons in Vgat-Cre mice and subsequent EEG detection after acupuncture treatment. Combined EEG, EMG, and video recordings were used to determine the sleep-waking patterns; B: experimental strategy for assessing the effect of MA on the chemogenetic inactivation of TRN GABA neurons; Viral injections were administered at day −21 (3 weeks before intervention initiation), EEG were conducted after completion of acupuncture on day 5 (indicated by the arrow). Control (Cont) group: received normal saline (NS, blue dots) injections; PCPA group: Received p-chlorophenylalanine (PCPA, red dots) injections, followed by NS injections at days 3-5; MA group: received PCPA injections, then received acupuncture (triangles) combined with NS injections; MA + hM4Di group: received PCPA injections, then received acupuncture combined with clozapine N-oxide (CNO, yellow dots) injections (to trigger chemogenetic silencing of the TRN via hM4Di, 30 min before each MA session). Symbol legend: Red dots: PCPA; blue dots: NS; yellow dots: CNO; triangles: acupuncture; C: the effects of virus transfection are validated by post hoc sectioning. The scale bar represents 250 μm. TRN: thalamic reticular nucleus; GABA: gamma-aminobutyric acid-ergic; EEG: electroencephalography; EMG: electromyography; MA: manual acupuncture.
Figure 4 Power spectrum analysis of the EEG A: representative EEG and EMG traces in PCPA mice; Scale bar = 1 second; B: representative EEG and EMG traces following chemogenetic inactivation of TRN GABA neurons during MA; C: quantitative analysis of delta power band percentages; D: quantitative analysis of theta power band percentages; E: quantitative analysis of alpha power band percentages; F: quantitative analysis of beta power band percentages; G: quantitative analysis of gamma power band percentages. The hM4Di + MA group received PCPA and MA treatment plus stereotaxic injection of AAV2/9-EF1α-DIO-hM4Di into the TRN, with i.p. CNO (0.1 mL/10 g) administered 30 min before MA. EEG: electroencephalography; EMG: electromyography; PCPA: p-chlorophenylalanine; TRN: thalamic reticular nucleus; GABA: gamma-aminobutyric acid-ergic; MA: manual acupuncture; hM4Di: human M4 muscarinic receptor-based designer receptor exclusively activated by designer drugs; CNO: clozapine N-oxide; ANOVA: analysis of variance; HSD: honestly significant difference; SEM: standard error of the mean. Differences among groups were examined using one-way ANOVA followed by tukey's HSD test. Data are presented as mean ± SEM (n = 3). Compared with the Control group, aP < 0.01; compared with the PCPA group, bP < 0.01; compared with the Control group, cP < 0.05; compared with the PCPA group, dP < 0.05.
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