中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (7): 2053-2067.doi: 10.4103/NRR.NRR-D-23-01542

• 原著:退行性病与再生 • 上一篇    下一篇

延长的间歇性θ爆发式经颅磁刺激恢复6-羟基多巴胺帕金森病大鼠模型G蛋白偶联腺苷受体A2AR 和 A1R 介导的腺苷信号之间的平衡

  

  • 出版日期:2025-07-15 发布日期:2024-11-27

Prolonged intermittent theta burst stimulation restores the balance between A2AR- and A1R-mediated adenosine signaling in the 6-hydroxidopamine model of Parkinson’s disease

Milica Zeljkovic Jovanovic1 , Jelena Stanojevic2 , Ivana Stevanovic2 , Milica Ninkovic2 , Tihomir V. Ilic2 , Nadezda Nedeljkovic1 , Milorad Dragic1, *   

  1. 1 Laboratory for Neurobiology, Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Belgrade, Serbia;  2 Medical Faculty of Military Medical Academy, University of Defence, Belgrade, Serbia
  • Online:2025-07-15 Published:2024-11-27
  • Contact: Milorad Dragic, PhD, milorad.dragic@bio.bg.ac.rs.
  • Supported by:
    This study was supported by a grant from Ministry of Science, Technological Development and Innovation, Serbia, No. 451-03-68/2022-14/200178 (to NN) and University of Defence, No. MFVMA/02/22-24 (to MN).

摘要:

腺苷介导的信号传导失衡,尤其是G蛋白偶联腺苷受体亚型A2AR介导的信号传导增加,在帕金森病(PD)的发病机制中扮演着重要角色。重复经颅磁刺激可改善帕金森病的运动/非运动症状;然而,经颅磁刺激产生有益影响的潜在机制尚不清楚。为探讨延长的间歇性θ爆发式经颅磁刺激(iTBS)对6-羟基多巴胺诱导的帕金森病大鼠模型的有益作用与腺苷介导信号转导的关系,实验对帕金森病大鼠进行为期3周的 iTBS 治疗,并以转棒实验评估其运动功能;并对病变尾壳核进行了免疫印迹、qRT-PCR、免疫组织化学和腺苷介导的信号传导成分的生化分析。结果发现,延长的间歇性θ爆发式经颅磁刺激可改善帕金森病大鼠的运动症状。6-羟基多巴胺病变导致尾壳核多巴胺能神经元逐渐丧失。经过延长的间歇性θ爆发式经颅磁刺激治疗后,运动症状完全恢复,这种改善伴随着A2AR的下调,以及延长的间歇性θ爆发式经颅磁刺激治疗3周后A1R-腺苷脱氨酶1恢复到生理水平。实验结果表明,6-羟基多巴胺诱导的变性使A1R的表达量最小化,A2AR的表达增加,而延长的间歇性θ爆发式经颅磁刺激通过控制A2AR 和 A1R 介导的腺苷信号之间的平衡抵消了这些不良影响,从而促进运动功能的恢复。

https://orcid.org/0000-0003-4855-6131 (Milorad Dragic)

Abstract: An imbalance in adenosine-mediated signaling, particularly the increased A2AR-mediated signaling, plays a role in the pathogenesis of Parkinson’s disease. Existing therapeutic approaches fail to alter disease progression, demonstrating the need for novel approaches in PD. Repetitive transcranial magnetic stimulation is a non-invasive approach that has been shown to improve motor and non-motor symptoms of Parkinson’s disease. However, the underlying mechanisms of the beneficial effects of repetitive transcranial magnetic stimulation remain unknown. The purpose of this study is to investigate the extent to which the beneficial effects of prolonged intermittent theta burst stimulation in the 6-hydroxydopamine model of experimental parkinsonism are based on modulation of adenosine-mediated signaling. Animals with unilateral 6-hydroxydopamine lesions underwent intermittent theta burst stimulation for 3 weeks and were tested for motor skills using the Rotarod test. Immunoblot, quantitative reverse transcription polymerase chain reaction, immunohistochemistry, and biochemical analysis of components of adenosine-mediated signaling were performed on the synaptosomal fraction of the lesioned caudate putamen. Prolonged intermittent theta burst stimulation improved motor symptoms in 6-hydroxydopamine-lesioned animals. A 6-hydroxydopamine lesion resulted in progressive loss of dopaminergic neurons in the caudate putamen. Treatment with intermittent theta burst stimulation began 7 days after the lesion, coinciding with the onset of motor symptoms. After treatment with prolonged intermittent theta burst stimulation, complete motor recovery was observed. This improvement was accompanied by downregulation of the eN/CD73- A2AR pathway and a return to physiological levels of A1R-adenosine deaminase 1 after 3 weeks of intermittent theta burst stimulation. Our results demonstrated that 6-hydroxydopamine-induced degeneration reduced the expression of A1R and elevated the expression of A2AR. Intermittent theta burst stimulation reversed these effects by restoring the abundances of A1R and A2AR to control levels. The shift in ARs expression likely restored the balance between dopamine-adenosine signaling, ultimately leading to the recovery of motor control.

Key words: A1R, A2ARl adenosine receptorsl adenosinel ecto-5′-nucleotidasel intermittent theta burst stimulationl non-invasive brain stimulationl Parkinson’s diseasel purinergic signalling