中国神经再生研究(英文版) ›› 2021, Vol. 16 ›› Issue (6): 1099-1104.doi: 10.4103/1673-5374.300451

• 原著:退行性病与再生 • 上一篇    下一篇

α7烟碱型胆碱能受体和σ1受体激动剂联合治疗对帕金森病的神经保护和抗炎作用

  

  • 出版日期:2021-06-15 发布日期:2020-12-31

Neuroprotective and anti-inflammatory effects of a therapy combining agonists of nicotinic α7 and σ1 receptors in a rat model of Parkinson’s disease

Steven Vetel1, Laura Foucault-Fruchard1, 2, #, Claire Tronel1, #, Frédéric Buron3, Jackie Vergote1, Sylvie Bodard1, Sylvain Routier3, Sophie Sérrière1, Sylvie Chalon1, *   

  1. 1 UMR 1253, iBrain, Université de Tours, Inserm, Tours, France;  2 CHU Tours, Service pharmacie, Tours, France;  3 Institut de Chimie Organique et Analytique, ICOA, UMR CNRS 7311, Université d’Orléans, Orléans, France
  • Online:2021-06-15 Published:2020-12-31
  • Contact: Sylvie Chalon, PhD, sylvie.chalon@univ-tours.fr.
  • Supported by:
    This work was supported  by Inserm (to SV, LFF, CT, JV, SB, SS, SC) and by the Labex IRON (ANR-11-LABX-18-01: to all authors).

摘要:

迄今为止,尚无能够阻止或延缓以帕金森病为特征的多巴胺能神经元丧失的有效治疗方法。最近在阿尔茨海默病啮齿动物模型中观察到,α7烟碱型胆碱能受体和σ1受体(α7-nAChR)和sigma-1受体之间的相互作用可以调节与帕金森病病理生理机制相关的神经炎症。为了解同时给予α7烟碱型胆碱能受体激动剂PHA 543613和σ1受体激动剂PRE-084对6-羟基多巴胺诱导的帕金森病模型大鼠的影响,实验给予帕金森病模型大鼠PHA 543613+PRE-084干预至伤后14天。纹状体中多巴胺转运蛋白密度和黑质中酪氨酸羟化酶免疫反应评估结果显示,PHA/PRE治疗可诱导多巴胺能神经元的部分保护(15-20%)。同时纹状体中的18 kDa易位蛋白密度和神经胶质纤维酸性蛋白染色,以及黑质中的CD11b和神经胶质纤维酸性蛋白染色结果显示,这种双重疗法降低了6-羟基多巴胺损伤后的神经胶质激活程度。表明α7-nAChR和σ1-R共同作用可以通过调节小胶质细胞活化来促进黑质纹状体多巴胺能神经元的部分恢复。

https://orcid.org/0000-0003-1865-8380 (Sylvie Chalon)

Abstract: To date there is no treatment able to stop or slow down the loss of dopaminergic neurons that characterizes Parkinson’s disease. It was recently observed in a rodent model of Alzheimer’s disease that the interaction between the α7 subtype of nicotinic acetylcholine receptor (α7-nAChR) and sigma-1 receptor (σ1-R) could exert neuroprotective effects through the modulation of neuroinflammation which is one of the key components of the pathophysiology of Parkinson’s disease. In this context, the aim of the present study was to assess the effects of the concomitant administration of N-(3R)-1-azabicyclo[2.2.2]oct-3-yl-furo[2,3-c]pyridine-5-carboxamide (PHA) 543613 as an α7-nAChR agonist and 2-(4-morpholinethyl) 1-phenylcyclohexanecarboxylate (PRE)-084 as a σ1-R agonist in a well-characterized 6-hydroxydopamine rat model of Parkinson’s disease. The animals received either vehicle separately or the dual therapy PHA/PRE once a day until day 14 post-lesion. Although no effect was noticed in the amphetamine-induced rotation test, our data has shown that the PHA/PRE treatment induced partial protection of the dopaminergic neurons (15–20%), assessed by the dopamine transporter density in the striatum and immunoreactive tyrosine hydroxylase in the substantia nigra. Furthermore, this dual therapy reduced the degree of glial activation consecutive to the 6-hydroxydopamine lesion, i.e, the 18 kDa translocation protein density and glial fibrillary acidic protein staining in the striatum, and the CD11b and glial fibrillary acidic protein staining in the substantia nigra. Hence, this study reports for the first time that concomitant activation of α7-nAChR and σ1-R can provide a partial recovery of the nigro-striatal dopaminergic neurons through the modulation of microglial activation. The study was approved by the Regional Ethics Committee (CEEA Val de Loire n°19) validated this protocol (Authorization N°00434.02) on May 15, 2014.

Key words: 6-hydroxydopamine, astrocytes, microglial activation, neurodegeneration, neuroinflammation, nicotinic α7 receptor, Parkinson’s disease, PHA 543613, PRE-084, sigma-1 receptor