中国神经再生研究(英文版) ›› 2023, Vol. 18 ›› Issue (6): 1354-1363.doi: 10.4103/1673-5374.357911

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

Charcot-Marie-Tooth-1A与坐骨神经压迫大鼠模型:蛋白质组学分析带来的启示

  

  • 出版日期:2023-06-15 发布日期:2023-01-05
  • 基金资助:
    欧盟(欧洲区域发展基金)博士研究生奖学金

Charcot-Marie-Tooth-1A and sciatic nerve crush rat models: insights from proteomics

Zeina Msheik1, Stephanie Durand2, 3, Emilie Pinault2, Martial Caillaud4, Laetitia Vignaud1, Fabrice Billet1, Mohamed El Massry1, Alexis Desmouliere1, *   

  1. 1UR20218 NeurIT (NEURopathies périphériques et Innovation Thérapeutique), University of Limoges, Limoges, France; 2BISCEm (Biologie Intégrative Santé Chimie Environnement) Platform, US 42 Inserm/UAR 2015 CNRS, University of Limoges, Limoges, France; 3UMR 1308 Inserm/CHU–CAPTuR (Contrôle de l’Activation cellulaire, Progression Tumorale et Résistance thérapeutique), University of Limoges, Limoges, France; 4Inserm UMR1235–TENS (The Enteric Nervous System in Gut and Brain Diseases), University of Nantes, Nantes, France
  • Online:2023-06-15 Published:2023-01-05
  • Contact: Alexis Desmoulière, PharmD, PhD, alexis.desmouliere@unilim.fr.
  • Supported by:
    ZM is supported by a doctoral fellowship from the European Union (European Regional Development Fund).

摘要:

作者团队既往已经研究了周围神经病变的遗传和非遗传形式周围神经病变动物模型--1A型Charcot-Marie-Tooth病和坐骨神经挤压(SNC)大鼠模型的感觉-运动和组织学变化。为进一步比较两种病理情况的蛋白质特征,实验收集了鼠龄3个月的1A型Charcot-Marie-Tooth病、坐骨神经挤压伤后1个月和未受伤的野生型大鼠远端坐骨神经,对其蛋白质进行定量质谱 SWATH LC-MS/MS分析。被鉴定和量化的445个映射到Swiss-Prot或trEMBL Uniprot数据库的蛋白质中,153个在1A型Charcot-Marie-Tooth病和野生大鼠之间显示出显著差异,且大部分蛋白质在CMT1A中过表达。使用Gene Ontology进行层次聚类和功能富集,根据这些蛋白质与1A型Charcot-Marie-Tooth病病理生理学有关的生物效应对这些差异表达的基因进行分组。在坐骨神经挤压伤大鼠远端坐骨神经459个鉴定的蛋白质中,有92个在1A型Charcot-Marie-Tooth病和未受伤的野生型(WT)大鼠远端坐骨神经间显示出明显差异。蛋白质组学检测结果表明,鼠龄3个月的年轻1A型Charcot-Marie-Tooth病大鼠在氧化还原平衡、蛋白质折叠、髓鞘化和轴突生成的水平上发展出补偿机制,但这些机制似乎不足以阻碍疾病的发展。值得注意的是,对氧化应激的反应似乎是1A型Charcot-Marie-Tooth病的一个重要特征,可能在病理过程中起作用。与之相反,大多数与野生型大鼠差异表达的蛋白质在坐骨神经挤压伤后下调。功能富集分析表明,神经发生、对轴突损伤的反应和氧化应激是重要的生物过程。蛋白质分析显示,伤后神经修复并不完善。总之,无论是遗传性还是外伤性的周围神经病,都有一些共同的病理途径,识别这些蛋白质特征可以在开发药理学干预目标方面发挥重要作用。

https://orcid.org/0000-0003-1096-0702 (Alexis Desmoulière)

Abstract: The sensorimotor and histological aspects of peripheral neuropathies were already studied by our team in two rat models: the sciatic nerve crush and the Charcot-Marie-Tooth-1A disease. In this study, we sought to highlight and compare the protein signature of these two pathological situations. Indeed, the identification of protein profiles in diseases can play an important role in the development of pharmacological targets. In fact, Charcot-Marie-Tooth-1A rats develop motor impairments that are more severe in the hind limbs. Therefore, for the first time, protein expression in sciatic nerve of Charcot-Marie-Tooth-1A rats was examined. First, distal sciatic nerves were collected from Charcot-Marie-Tooth-1A and uninjured wild-type rats aged 3 months. After protein extraction, sequential window acquisition of all theoretical fragment ion spectra liquid chromatography and mass spectrometry was employed. 445 proteins mapped to Swiss-Prot or trEMBL Uniprot databases were identified and quantified. Of these, 153 proteins showed statistically significant differences between Charcot-Marie-Tooth-1A and wild-type groups. The majority of these proteins were overexpressed in Charcot-Marie-Tooth-1A. Hierarchical clustering and functional enrichment using Gene Ontology were used to group these proteins based on their biological effects concerning Charcot-Marie-Tooth-1A pathophysiology. Second, proteomic characterization of wild-type rats subjected to sciatic nerve crush was performed sequential window acquisition of all theoretical fragment ion spectra liquid chromatography and mass spectrometry. One month after injury, distal sciatic nerves were collected and analyzed as described above. Out of 459 identified proteins, 92 showed significant differences between sciatic nerve crush and the uninjured wild-type rats used in the first study. The results suggest that young adult Charcot-Marie-Tooth-1A rats (3 months old) develop compensatory mechanisms at the level of redox balance, protein folding, myelination, and axonogenesis. These mechanisms seem insufficient to hurdle the progress of the disease. Notably, response to oxidative stress appears to be a significant feature of Charcot-Marie-Tooth-1A, potentially playing a role in the pathological process. In contrast to the first experiment, the majority of the proteins that differed from wild-type were downregulated in the sciatic nerve crush group. Functional enrichment suggested that neurogenesis, response to axon injury, and oxidative stress were important biological processes. Protein analysis revealed an imperfect repair at this time point after injury and identified several distinguishable proteins. In conclusion, we suggest that peripheral neuropathies, whether of a genetic or traumatic cause, share some common pathological pathways. This study may provide directions for better characterization of these models and/or identifying new specific therapeutic targets.

Key words: Charcot-Marie-Tooth-1A, endoplasmic reticulum, Gene Ontology, neurogenesis, oxidative stress, proteomics, rat, repair, sciatic nerve crush, SWATH-MS