中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (24): 3903-3907.doi: 10.12307/2022.574

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

选择性瞬变感受器电位蛋白V4激动剂GSK1016790A对轴突再生的影响

秦绪祯1,马进进1,李梅梅2,王星然2,谢计乐2,赛吉拉夫1,2   

  1. 1苏州大学附属第一医院,江苏省苏州市  215000;2苏州大学骨科研究所,江苏省苏州市  215000
  • 收稿日期:2020-11-30 接受日期:2021-01-16 出版日期:2022-08-28 发布日期:2022-01-24
  • 通讯作者: 赛吉拉夫,特聘教授,博士生导师,苏州大学附属第一医院,江苏省苏州市 215000;苏州大学骨科研究所,江苏省苏州市 215000
  • 作者简介:秦绪祯,男,1994年生,黑龙江省鹤岗市人,汉族,苏州大学在读硕士,主要从事骨与神经再生研究。
  • 基金资助:
    国家自然科学基金(81571189,81772353),项目负责人:赛吉拉夫;国家重点研究发展计划(2016YFC1100203),项目负责人:赛吉拉夫;江苏省创新创业计划,项目负责人:赛吉拉夫

Effect of transient receptor potential vanilloid 4 agonist GSK1016790A on axonal regeneration

Qin Xuzhen1, Ma Jinjin1, Li Meimei2, Wang Xingran2, Xie Jile2, Saijilafu1, 2   

  1. 1First Affiliated Hospital of Soochow University, Suzhou 215000, Jiangsu Province, China; 2Institute of Orthopedics, Soochow University, Suzhou 215000, Jiangsu Province, China
  • Received:2020-11-30 Accepted:2021-01-16 Online:2022-08-28 Published:2022-01-24
  • Contact: Saijilafu, Professor, Doctoral supervisor, First Affiliated Hospital of Soochow University, Suzhou 215000, Jiangsu Province, China; Institute of Orthopedics, Soochow University, Suzhou 215000, Jiangsu Province, China
  • About author:Qin Xuzhen, Master candidate, First Affiliated Hospital of Soochow University, Suzhou 215000, Jiangsu Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81571189, 81772353 (to Saijilafu); National Key Research and Development Plan, No. 2016YFC1100203 (to Saijilafu); Innovation and Entrepreneurship Plan of Jiangsu Province (to Saijilafu)

摘要:

文题释义:
GSK1016790A:是一种有效的选择性瞬变感受器电位蛋白V4(transient receptor potential vanilloid 4,TRPV4)通道激动剂。在人胚肾细胞中,GSK1016790A可以诱发Ca2+流入并提高细胞内Ca2+浓度。
背根神经节:脊髓背根相连的膨胀半透明结节,由感觉神经细胞组成,接收传入的感觉神经冲动,将它们传送到脊髓。

背景:选择性瞬变感受器电位蛋白V4(transient receptor potential vanilloid 4,TRPV4)激动剂GSK1016790A能够在短时间内激活TRPV4蛋白,表现为Ca2+内流,而蛋白表达量不变。但是在培养过程中,GSK1016790A会使HeLa细胞膜表面TRPV4表达降低,这一现象对神经再生是否产生影响仍不清楚。
目的:探究TRPV4激动剂GSK1016790A在不同时期内对神经元轴突再生的影响。
方法:取6-8周龄ICR小鼠背根神经节,经过胶原酶和胰酶处理使细胞充分解离,进行背根神经节细胞培养。在培养初期加入GSK1016790A刺激2 h后去除激动剂继续培养3 d,或者加入GSK1016790A持续处理3 d;空白对照组不进行任何处理。采用免疫印迹法检测TRPV4蛋白表达以及轴突再生相关蛋白表达,同时进行TUJ1和TRPV4免疫荧光染色,观察轴突分叉数目、轴突再生长度、细胞存活数变化。
结果与结论:①与空白对照组相比,GSK1016790A刺激神经细胞2 h后,TRPV4蛋白变化无明显差异(P > 0.05);而刺激神经细胞3 d后TRPV4表达明显降低(P < 0.05);②与空白对照组相比,GSK1016790A刺激神经细胞2 h后,轴突分叉数目及轴突长度无明显差异(P > 0.05);而刺激神经细胞3 d后轴突分叉数目及轴突长度均明显增加(P < 0.05);③与空白对照组相比,GSK1016790A刺激神经细胞2 h或3 d后,细胞存活率均无明显改变;④与空白对照组相比,GSK1016790A刺激神经细胞3 d后,PTEN蛋白表达降低(P < 0.05),神经轴突再生显著,这一过程可能经抑制PTEN蛋白表达介导的。
缩略语:选择性瞬变感受器电位蛋白V4:transient receptor potential vanilloid 4,TRPV4

https://orcid.org/0000-0003-2290-9808 (赛吉拉夫) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 选择性瞬变感受器电位蛋白V4, GSK1016790A, 背根神经节, 神经再生, 轴突, PTEN蛋白

Abstract: BACKGROUND: The transient receptor potential vanilloid 4 (TRPV4) agonist GSK1016790A can activate TRPV4 protein and induce Ca2+ influx in a short time, while its expression remains unchanged. However, during culture, the decreased expression of TRPV4 on HeLa cell membrane surface was induced by GSK1016790A. Whether the phenomenon had an effect on neural regeneration is still not clear. 
OBJECTIVE: To explore the effect of TRPV4 agonist GSK1016790A on axonal regeneration in different periods.
METHODS: The dorsal root ganglion cells of ICR mouse at 6-8 weeks were treated by collagenase and trypsin for cell culture. In the 2-hour group, the agonist GSK1016790A was added at the initial stage of culture and the cells were treated for 2 hours and the culture was continued for 3 days. The 3-day group was treated with the agonist GSK1016790A for 3 days. The blank control group did not undergo any treatment. The TRPV4 protein expression and axon regeneration related protein expression were examined by western blot assay. TUJ1 and TRPV4 immunofluorescence staining was performed simultaneously. Number of axon branches, length of axon regeneration, and number of cell survival were counted. 
RESULTS AND CONCLUSION: (1) Compared with the blank control group, there was no significant difference in TRPV4 protein changes after GSK101 stimulated nerve cells for 2 hours (P > 0.05); while the expression of TRPV4 decreased significantly after nerve cells were stimulated for 3 days (P < 0.05). (2) Compared with the blank control group, after GSK1016790A stimulated nerve cells for 2 hours, there was no significant difference in the number of axon branches and axon length (P > 0.05); after stimulating nerve cells for 3 days, the number of axon bifurcations and axon length were increased significantly (P < 0.05). (3) Compared with the blank control group, there was no significant change in cell survival rate after GSK1016790A stimulated nerve cells for 2 hours or 3 days. (4) Compared with the blank control group, after GSK1016790A stimulated nerve cells for 3 days, the expression of PTEN decreased (P < 0.05), and the regeneration of nerve axons was significant. This process may be mediated by inhibiting the expression of PTEN protein.

Key words: transient receptor potential vanilloid 4, GSK1016790A, dorsal root ganglion, nerve regeneration, axon, PTEN protein

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