Expression of Reg3g after brain trauma and its effect on early epilepsy in mice

Tianjun ZHOU; Saiyu CHENG

doi:10.16016/j.2097-0927.202208025

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Expression of Reg3g after brain trauma and its effect on early epilepsy in mice

Neurosciences | 更新时间：2026-01-09

- Expression of Reg3g after brain trauma and its effect on early epilepsy in mice
- Journal of Army Medical University Vol. 45, Issue 5, Pages: 386-392(2023)
- 作者机构：
  
  401120 重庆，重庆医科大学附属第三医院神经疾病中心
- 作者简介：
- 基金信息：
  
  the General Program of National Natural Science Foundation of China(81671190)
- DOI：10.16016/j.2097-0927.202208025
  CLC： R651.15;R741.02;R742.1
- Received：03 August 2022，
  
  Revised：2022-10-12，
  
  Published：15 March 2023
- 稿件说明：
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Tianjun ZHOU, Saiyu CHENG. Expression of Reg3g after brain trauma and its effect on early epilepsy in mice[J]. Journal of Army Medical University, 2023, 45(5): 386-392.
DOI：

Tianjun ZHOU, Saiyu CHENG. Expression of Reg3g after brain trauma and its effect on early epilepsy in mice[J]. Journal of Army Medical University, 2023, 45(5): 386-392. DOI： 10.16016/j.2097-0927.202208025.

摘要

目的

探讨Reg3g信号激活在创伤性脑损伤(traumatic brain injury

TBI)脑组织中的时空表达规律和对TBI早期癫痫发作敏感性的影响。

方法

采用控制性皮质撞击(controlled cortical impact

CCI)制备TBI模型

在分子与形态学实验中

60只C57BL/6N野生型(wild type

WT)小鼠按照随机数字表法分为4组: sham组、CCI 24 h组、CCI 72 h组、CCI 1周组。通过RT-PCR、Western blot、免疫荧光等方法检测Reg3g的时空表达规律。采用海人酸(kainic acid

KA)诱导癫痫

在脑创伤癫痫发作实验中

WT小鼠和Reg3g KO小鼠各30只

按照随机数字表法分组

每组15只

分别为WT (CCI)+NS组、Reg3g KO (CCI)+NS组、WT (CCI)+KA组、Reg3g KO (CCI)+KA组。在CCI基础上进行癫痫诱导发作

并记录在体脑电结果。

结果

①与sham组相比

CCI损伤侧皮层24 h、72 h、1周后

Reg3g基因和蛋白表达明显升高

差异有统计学意义(

0.01);②免疫荧光结果显示

在CCI小鼠皮层组织

Reg3g与NeuN-阳性神经元完全共表达; ③在生理盐水注射的WT和Reg3g基因敲除小鼠

并没有观察到明显的癫痫波。而在KA注射的WT小鼠和Reg3g基因敲除小鼠

可观察到明显的癫痫波。与WT小鼠相比

KA注射的Reg3g基因敲除小鼠潜伏期明显缩短

总发作时间明显延长

差异有统计学意义(

0.05)。

结论

Reg3g对TBI后早期癫痫发作起着明显的保护作用

Reg3g可能是抑制TBI早期癫痫发作的重要调控靶点。

Abstract

Objective

To investigate the temporal and spatial expression profile of Reg3g signal activation in traumatic brain injury (TBI) and its effect on early seizure sensitivity of TBI.

Methods

TBI model was established with controlled cortical impact (CCI).In molecular and morphological experiments

60 C57BL/6N wild type (WT) mice were randomly divided into sham group

CCI 24-h group

CCI 72-h group and CCI 1-week group.The temporal and spatial expression of Reg3g was detected by RT-PCR

Western blotting and immunofluorescence assay.Epilepsy was induced by kainic acid (KA).In the brain trauma seizure experiment

30 WT mice and 30 Reg3g KO mice were randomly divided into WT (CCI)+(normal saline

NS) group

Reg3g KO (CCI)+NS group

WT (CCI)+KA group and Reg3g KO (CCI)+KA group.Epileptic seizures were induced on the basis of CCI

and electroencephalography (EEG) was performed

in vivo

Results

① Compared with the sham group

the mRNA and protein expression of Reg3g in the cortex of the CCI injured side was significantly increased in 24 and 72 h and 1 week after CCI (

0.01).② The results of immunofluorescence assay showed that Reg3g and NeuN were completely co-expressed in the ne

urons in the cortex of CCI mice.③ No obvious epileptic waves were observed in WT and Reg3g KO mice injected with NS.Significant epileptic waves were observed in WT mice and Reg3g KO mice injected with KA.Compared with the WT mice

the latency of Reg3g KO mice injected with KA was significantly shorter and the total attack time was significantly longer (

0.05).

Conclusion

Reg3g plays a significant protective role in early seizures after TBI

and it may be an important regulatory target to inhibit early seizures after TBI.

关键词

Keywords

references

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