中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (1): 65-70.doi: 10.4103/1673-5374.150708

• 原著:周围神经损伤修复保护与再生 • 上一篇    下一篇

神经调节蛋白1 Ⅲ型在周围神经系统髓鞘发育各期的表达变化

  

  • 收稿日期:2014-12-14 出版日期:2015-01-15 发布日期:2015-01-15
  • 基金资助:

    国家重点基础研究发展计划(973计划资助支持中国第2014CB542206)国家自然科学基金(81201389,30973052),教育部长江学者和创新团队计划(irt13051)。

Expression pattern of neuregulin-1 type III during the development of the peripheral nervous system

Liang-liang Huang, Zhong-yang Liu, Jing-hui Huang *, Zhuo-jing Luo *   

  1. Department of Orthopedics, Xijing Hospital, the Fourth Military Medical University of Chinese PLA, Xi’an, Shaanxi Province, China
  • Received:2014-12-14 Online:2015-01-15 Published:2015-01-15
  • Contact: Jing-hui Huang, M.D., Ph. D., huangjh@fmmu.edu.cn. Zhuojing Luo, M.D., Ph.D., zjluo@fmmu.edu.cn, zhuojingl@163.com.
  • Supported by:

    This study was supported by grants from the National Program on Key Basic Research Project of China (973 Program), No. 2014CB542206; the National Natural Science Foundation of China, No. 81201389, 30973052; and Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China, No. IRT13051.

摘要:

背根神经节神经调节蛋白1 Ⅲ型 (Neuregulin-1 type Ⅲ)是调控许旺细胞增殖和向成髓鞘方向分化的关键分子,其表达还可以调控髓鞘的厚度。但是,神经调节蛋白1 Ⅲ型作为调节成髓鞘关键分子,在周围神经系统发育过程中如成髓鞘前期、成髓鞘期以及成髓鞘后表达变化规律目前却仍然不清楚。实验提取出生后1-56 d的大鼠背根神经节,应用实时定量PCR,Western blot 和免疫荧光技术检测神经调节蛋白1 Ⅲ型在背根神经节不同发育阶段中的表达。背根神经节神经调节蛋白1 Ⅲ型mRNA 的表达在出生后第3天达到最高峰,而在在出生后第3-56天处于一个相对较高的稳定水平。这一现象从出生后第1天逐渐升高,第28天达到最高,之后有所降低。免疫荧光结果发现神经上神经调节蛋白1 Ⅲ型荧光强度变化趋势与western blot类似。说明神经上神经调节蛋白1 Ⅲ型在外周神经系统出生后2-5 d成髓鞘前期以及出生后5-10 d成髓鞘期表达升高,且在出生10天以后成髓鞘后仍处于较高水平。

关键词: 神经再生, 许旺细胞, 背根神经节, 髓鞘, 神经调节蛋白1 Ⅲ型, 周围神经系统, 实时定量PCR, 蛋白印迹, 免疫荧光染色, 成髓鞘后期, 大鼠, 国家自然科学基金

Abstract:

Neuregulin-1 type III is a key regulator in Schwann cell proliferation, committing to a myelinating fate and regulating myelin sheath thickness. However, the expression pattern of neuregulin-1 type III in the peripheral nervous system during developmental periods (such as the premyelinating stage, myelinating stage and postmyelinating stage) has rarely been studied. In this study, dorsal root ganglia were isolated from rats between postnatal day 1 and postnatal day 56. The expression pattern of neuregulin-1 type III in dorsal root ganglia neurons at various developmental stages were compared by quantitative real-time polymerase chain reaction, western blot assay and immunofluorescent staining. The expression of neuregulin-1 type III mRNA reached its peak at postnatal day 3 and then stabilized at a relative high expression level from postnatal day 3 to postnatal day 56. The expression of neuregulin-1 type III protein increased gradually from postnatal day 1, reached a peak at postnatal day 28, and then decreased at postnatal day 56. Immunofluorescent staining results showed a similar tendency to western blot assay results. Experimental findings indicate that the expression of neuregulin-1 type III in rat dorsal root ganglion was increased during the premyelinating (from postnatal day 2 to postnatal day 5) and myelinating stage (from postnatal day 5 to postnatal day 10), but remained at a high level in the postmyelinating stage (after postnatal day 10).

Key words: nerve regeneration, Schwann cells, dorsal root ganglia, myelin sheath, neuregulin-1 type III, peripheral nervous system, quantitative real-time polymerase chain reaction, western blot, immunofluorescent staining, postmyelinating, rats, NSFC grants, neural regeneration