中国神经再生研究(英文版) ›› 2016, Vol. 11 ›› Issue (4): 652-656.doi: 10.4103/1673-5374.180753

• 原著:视神经损伤修复保护与再生 • 上一篇    下一篇

脐血干细胞或脑源性神经营养因子保护损伤视神经及其粘弹性力学特征

  

  • 收稿日期:2015-08-07 出版日期:2016-04-30 发布日期:2016-04-30
  • 基金资助:

    吉林省科技发展计划资助项目(20110492)

Human umbilical cord blood-derived stem cells and brain-derived neurotrophic factor protect injured optic nerve: viscoelasticity characterization

Xue-man Lv1, Yan Liu2, Fei Wu3, Yi Yuan1, *, Min Luo4   

  1. 1 Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, China
    2 Department of Hand Surgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, China
    3 Department of Gynaecology and Obstetrics, Second Hospital of Jilin University, Changchun, Jilin Province, China
    4 Department of Pain Management, China-Japan Union Hospital of Jilin University, Changchun, Jilin Province, China
  • Received:2015-08-07 Online:2016-04-30 Published:2016-04-30
  • Contact: Yi Yuan, M.D., yuany@jlu.edu.cn.
  • Supported by:

    This study was supported by a grant from High-Tech Research and Development Program of Jilin Province of China, No. 20110492.

摘要:

视神经是一种粘弹性固体生物材料,其正常的应力松弛及蠕变特性可以满足抵抗视神经恒应变的需要,保护视神经不受到损伤。我们推测视神经损伤后应力松弛和蠕变特性会发生改变,而以脑源性神经营养因子或人脐血干细胞治疗可能会在一定程度恢复其应力松弛、蠕变特性。为验证此假设,实验以钳夹伤方法建立视神经损伤家兔模型7d后,向家兔玻璃体内一次性注射50μg脑源性神经营养因子或1×106人脐血干细胞?损伤30d时发现,以脑源性神经营养因子或人脐血干细胞治疗的视神经损伤家兔7200s应力松弛、蠕变等粘弹性力学特性恢复明显,损伤的视神经病理变化得到明显的恢复。说明视神经损伤模型经人脐血干细胞和脑源性神经营养因子干预,产生了恢复视神经粘弹性力学特性和促进损伤视神经恢复的作用。

orcid: 0000-0002-7007-2857 (Yi Yuan)

关键词: 神经再生, 视神经损伤, 人脐血干细胞, 脑源性神经营养因子, 组织形态, 应力松弛, 蠕变, 粘弹性

Abstract:

The optic nerve is a viscoelastic solid-like biomaterial. Its normal stress relaxation and creep properties enable the nerve to resist constant
strain and protect it from injury. We hypothesized that stress relaxation and creep properties of the optic nerve change after injury. Moreover,
human brain-derived neurotrophic factor or umbilical cord blood-derived stem cells may restore these changes to normal. To validate
this hypothesis, a rabbit model of optic nerve injury was established using a clamp approach. At 7 days after injury, the vitreous body received
a one-time injection of 50 μg human brain-derived neurotrophic factor or 1 × 106 human umbilical cord blood-derived stem cells.
At 30 days after injury, stress relaxation and creep properties of the optic nerve that received treatment had recovered greatly, with pathological
changes in the injured optic nerve also noticeably improved. These results suggest that human brain-derived neurotrophic factor or
umbilical cord blood-derived stem cell intervention promotes viscoelasticity recovery of injured optic nerves, and thereby contributes to
nerve recovery.

Key words: nerve regeneration, optic nerve injury, human umbilical cord blood-derived stem cells, brain-derived neurotrophic factors, creep, histomorphology, stress relaxation, viscoelasticity, neural regeneration