中国神经再生研究(英文版) ›› 2024, Vol. 19 ›› Issue (10): 2270-2280.doi: 10.4103/1673-5374.392887

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

3'-脱氧腺苷通过抑制NLRP3炎症小体减轻甲基苯丙胺诱导的异常突触可塑性和渴求行为

  

  • 出版日期:2024-10-15 发布日期:2024-01-29

3′-Deoxyadenosin alleviates methamphetamine-induced aberrant synaptic plasticity and seeking behavior by inhibiting the NLRP3 inflammasome

Yize Qi1, Yao Zhou1, Jiyang Li1, Fangyuan Zhu1, Gengni Guo1, Can Wang1, Man Yu1, Yijie Wang1, Tengfei Ma1, 2, *, Shanwu Feng3, *, Li Zhou3, *   

  1. 1Institute for Stem Cell and Neural Regeneration and Key Laboratory of Cardiovascular & Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing, Jiangsu Province,  China; 2Department of Anesthesiology, The Second People’s Hospital of Lianyungang, Lianyungang, Jiangsu Province, China; 3Department of Anesthesiology, Women’s Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, Jiangsu Province, China
  • Online:2024-10-15 Published:2024-01-29
  • Contact: Tengfei Ma, PhD, tfma@njmu.edu.cn; Shanwu Feng, MD, shanwufeng@163.com; Li Zhou, MD, zlxyz666a@163.com.
  • Supported by:
    This study was supported by the National Natural Science Foundation of China, No. 81971246 (to TM); Opening Foundation of Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, No. KF202204 (to LZ and SF).

摘要:

甲基苯丙胺成瘾是一种以持续寻求毒品行为为特征的脑部疾病,它与突触可塑性异常有关。越来越多的证据表明,突触可塑性异常与 NOD 样受体家族含吡啶域-3(NLRP3)炎性体的激活有关。传统中药蛹虫草的主要生物活性成分3'-脱氧腺苷,可抑制NLRP3炎性小体在脑内的表达。尽管既往研究已证实甲基苯丙胺成瘾可激活NLRP3炎性小体的表达,但3'-脱氧腺苷是否通过抑制该炎性小体影响神经元异常突触可塑性并降低甲基苯丙胺渴求行为尚不明确。实验首先发现甲基苯丙胺成瘾小鼠的条件位置偏爱评分,并减少海马神经元中c-fos的表达。进一步研究证实,3'-脱氧腺苷可以降低甲基苯丙胺引起的谷氨酸能突触传递的异常增强,并改善甲基苯丙胺诱导的突触可塑性损伤。此外,3'-脱氧腺苷降低海马神经元中NLRP3的表达和改善海马神经元损伤。NLRP3敲除小鼠表现为甲基苯丙胺渴求行为明显降低,突触可塑性及海马神经元损伤明显改善,表明NLRP3炎性小体在异常突触可塑性与甲基苯丙胺渴求中的关键作用。最后,药理学方法激活NLRP3逆转了3'-脱氧腺苷对渴求行为和突触可塑性的影响。以上结果表明3'-脱氧腺苷通过抑制NLRP3炎症小体来减轻甲基苯丙胺诱导的异常突触可塑性和渴求行为,为甲基苯丙胺成瘾的治疗提供了新的治疗思路。

https://orcid.org/0000-0002-8916-7370 (Tengfei Ma); https://orcid.org/0000-0002-5946-2811 (Shanwu Feng); https://orcid.org/0009-0000-5000-6679 (Li Zhou)

Abstract: Methamphetamine addiction is a brain disorder characterized by persistent drug-seeking behavior, which has been linked with aberrant synaptic plasticity. An increasing body of evidence suggests that aberrant synaptic plasticity is associated with the activation of the NOD-like receptor family pyrin domain containing-3 (NLRP3) inflammasome. 3′-Deoxyadenosin, an active component of the Chinese fungus Cordyceps militaris, has strong anti-inflammatory effects. However, whether 3′-deoxyadenosin attenuates methamphetamine-induced aberrant synaptic plasticity via an NLRP3-mediated inflammatory mechanism remains unclear. We first observed that 3′-deoxyadenosin attenuated conditioned place preference scores in methamphetamine-treated mice and decreased the expression of c-fos in hippocampal neurons. Furthermore, we found that 3′-deoxyadenosin reduced the aberrant potentiation of glutamatergic transmission and restored the methamphetamine-induced impairment of synaptic plasticity. We also found that 3′-deoxyadenosin decreased the expression of NLRP3 and neuronal injury. Importantly, a direct NLRP3 deficiency reduced methamphetamine-induced seeking behavior, attenuated the impaired synaptic plasticity, and prevented neuronal damage. Finally, NLRP3 activation reversed the effect of 3′-deoxyadenosin on behavior and synaptic plasticity, suggesting that the anti-neuroinflammatory mechanism of 3′-deoxyadenosin on aberrant synaptic plasticity reduces methamphetamine-induced seeking behavior. Taken together, 3′-deoxyadenosin alleviates methamphetamine-induced aberrant synaptic plasticity and seeking behavior by inhibiting the NLRP3 inflammasome.

Key words: 3′-deoxyadenosin, hippocampus, long-term potentiation, methamphetamine, NOD-like receptor family pyrin domain containing-3 (NLRP3) inflammasome, synaptic plasticity