中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (3): 452-457.doi: 10.4103/1673-5374.202929

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

豚鼠坐骨神经损伤模型适用于周围神经再生的研究?

  

  • 收稿日期:2017-03-01 出版日期:2017-03-15 发布日期:2017-03-15

Guinea pigs as an animal model for sciatic nerve injury

Malik Abu Rafee1, Amarpal1, Prakash Kinjavdekar1, Hari Prasad Aithal1, Sajad Ahmad Wani2, Irfan Ahmad Bhat3   

  1. 1 Division of Surgery, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, India; 2 Division of Veterinary Biotechnology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, India; 3 Division of Veterinary Physiology, Indian Veterinary Research Institute, Izatnagar, Bareilly, UP, India
  • Received:2017-03-01 Online:2017-03-15 Published:2017-03-15
  • Contact: Amarpal, MVSc, Ph.D., FNAVS, FISACP, FISVS,amarpal@ivri.res.in.

摘要:

神经再生相关动物实验中,约80%使用的动物是大小鼠,单一的实验动物种属的绝对优势性使用会产生相关体内实验结果的偏倚,从而不利于合理评估干预方法的有效性和安全性。为了解决这一问题,实验以8只成年豚鼠为对象,探讨基于其建立的动物模型是否适用于周围神经再生的研究。实验发现,在建立左后肢坐骨神经挤压伤豚鼠模型后,豚鼠痛知觉和肢体运动功能明显下降,且该现象持续至损伤后30d。损伤后7d,神经毡蛋白1,2基因表达明显上升。损伤后30d,豚鼠足印明显延长、趾端开口距明显缩短,腓肠肌肌萎缩现象明显;病理组织学和扫描电镜观察结果显示,损伤的坐骨神经发生明显的退变,损伤侧腓肠肌肌纤维退变。由此认为,豚鼠可用于建立周围神经损伤模型,同时由于其温顺的性情,可能成为周围神经损伤与再生研究中替代大小鼠的理想动物来源。

ORCID:0000-0002-4827-3433(Amarpal)

关键词: 神经再生, 豚鼠, 动物模型, 坐骨神经损伤, 足印长度, 组织病理学, 神经毡蛋白

Abstract:

The overwhelming use of rat models in nerve regeneration studies is likely to induce skewness in treatment outcomes. To address the problem, this study was conducted in 8 adult guinea pigs of either sex to investigate the suitability of guinea pig as an alternative model for nerve regeneration studies. A crush injury was inflicted to the sciatic nerve of the left limb, which led to significant decrease in the pain perception and neurorecovery up to the 4th weak. Lengthening of foot print and shortening of toe spread were observed in the paw after nerve injury. A 3.49 ± 0.35 fold increase in expression of neuropilin 1 (NRP1) gene and 2.09 ± 0.51 fold increase in neuropilin 2 (NRP2) gene were recorded 1 week after nerve injury as compared to the normal nerve. Ratios of gastrocnemius muscle weight and volume of the experimental limb to control limb showed more than 50% decrease on the 30th day. Histopathologically, vacuolated appearance of the nerve was observed with presence of degenerated myelin debris in digestion chambers. Gastrocnemius muscle also showed degenerative changes. Scanning electron microscopy revealed loose and rough arrangement of connective tissue fibrils and presence of large spherical globules in crushed sciatic nerve. The findings suggest that guinea pigs could be used as an alternative animal model for nerve regeneration studies and might be preferred over rats due to their cooperative nature while recording different parameters.

Key words: nerve regeneration, Guinea pigs, animal model, sciatic nerve injury, foot print length, neuropilin, histopathology, neural regeneration