天津医药 ›› 2024, Vol. 52 ›› Issue (4): 356-361.doi: 10.11958/20230591

• 实验研究 • 上一篇    下一篇

miR-582-5p靶向调控FOXO1对新生大鼠缺血缺氧性脑病神经元损伤的影响

颜海峰1(), 吴小红1, 林欲庆1, 霍开明1, 王莹莹2   

  1. 1 海南医学院第二附属医院儿科二区(邮编570311)
    2 海南医学院第二附属医院检验科(邮编570311)
  • 收稿日期:2023-04-19 修回日期:2023-06-16 出版日期:2024-04-15 发布日期:2024-04-19
  • 作者简介:颜海峰(1980),男,副主任医师,主要从事新生儿(早产儿)医学、重症医学、营养与儿童健康方面研究。E-mail:vj3byi2@163.com
  • 基金资助:
    2020年度海南省卫生健康行业科研项目(琼卫科教(2020)9号389)

Effect of miR-582-5p targeting regulation of FOXO1 on neuronal damage in neonatal rats with hypoxic ischemic encephalopathy

YAN Haifeng1(), WU Xiaohong1, LIN Yuqing1, HUO Kaiming1, WANG Yingying2   

  1. 1 Department of Pediatric Area II, the Second Affiliated Hospital of Hainan Medical College, Haikou 570311, China
    2 Department of Laboratory, the Second Affiliated Hospital of Hainan Medical College, Haikou 570311, China
  • Received:2023-04-19 Revised:2023-06-16 Published:2024-04-15 Online:2024-04-19

摘要:

目的 探讨微小RNA-582-5p(miR-582-5p)靶向调控叉头框转录因子1(FOXO1)对新生大鼠缺血缺氧性脑病(HIE)神经元损伤的影响。方法 90只新生大鼠按照随机数字表法均分为对照(NC)组、模型(HIE)组、miRNA对照(LV-miRNA-NC)组、miR-582-5p过表达(LV-miR-582-5p)组、miR-582-5p过表达+mRNA对照(LV-miR-582-5p+LV-NC)组、miR-582-5p过表达+FOXO1过表达(LV-miR-582-5p+LV-FOXO1)组。除NC组外的各组大鼠建立HIE模型,对大鼠进行神经功能缺损评分,TTC染色测定脑梗死体积,Real-time PCR检测miR-582-5p和FOXO1表达,双萤光素酶报告基因实验检测miR-582-5p和FOXO1靶向关系,HE染色观察海马组织病理变化,TUNEL和Neu N荧光双标共定位检测海马组织神经元凋亡,免疫组化染色检测FOXO1、胱天蛋白酶3(Caspase-3)蛋白表达。结果 miR-582-5p和FOXO1具有靶向关系,与NC组比较,HIE组大鼠神经功能缺损评分、脑梗死体积、FOXO1表达、神经元凋亡率、FOXO1、Caspase-3蛋白表达增加,miR-582-5p表达降低,海马组织出现病理损伤(P<0.05);与LV-miRNA-NC组比较,LV-miR-582-5p组大鼠神经功能缺损评分、脑梗死体积、FOXO1表达、神经元凋亡率、FOXO1、Caspase-3蛋白表达降低,miR-582-5p表达增加,海马组织病理损伤好转(P<0.05);LV-FOXO1可以逆转LV-miR-582-5p对于HIE大鼠神经元损伤的保护作用。结论 miR-582-5p可以直接靶向负调控FOXO1表达,减少HIE新生大鼠神经元凋亡,对神经损伤具有保护作用。

关键词: 缺氧缺血, 脑, 创伤, 神经系统, 叉头框蛋白O1, 微小RNA-582-5p

Abstract:

Objective To investigate the effect of microRNA-582-5p (miR-582-5p) on neuronal damage in neonatal rats with hypoxic ischemic encephalopathy (HIE) through targeted regulation of forkhead box transcription factor O1 (FOXO1). Methods Newborn rats (n=90) were randomly grouped into the control (NC) group, the model (HIE) group, the miRNA non-specific control (LV-miRNA-NC) group, the miR-582-5p overexpression (LV-miR-582-5p) group, the miR-582-5p overexpression+mRNA control (LV-miR-582-5p+LV-NC) group and the miR-582-5p overexpression+FOXO1 overexpression (LV-miR-582-5p+LV-FOXO1) group. HIE model was established in all groups except the NC group, and neurological deficits were scored on rats. TTC staining was applied to measure the volume of cerebral infarction. Real-time PCR was applied to detect miR-582-5p and FOXO1 expression. Dual fluorescence reporter gene experiment was applied to detect the targeting relationship between miR-582-5p and FOXO1. HE staining method was applied to observe pathological changes in hippocampal tissue. TUNEL and NeuN fluorescence dual labeling co localization were applied to detect neuronal apoptosis in hippocampal tissue. Immunohistochemistry was applied to detect expressions of FOXO1 and Caspase-3 proteins. Results There was a targeting relationship between MiR-582-5p and FOXO1. Compared with the NC group, the neurological deficit score, cerebral infarction volume, FOXO1 expression, neuronal apoptosis rate, FOXO1 and Caspase-3 protein expression were increased in the HIE group, and the miR-582-5p expression obviously decreased, the hippocampal tissue showed obvious pathological damage (P<0.05). Compared with the LV-miRNA-NC group, the neurological deficit score, cerebral infarction volume, FOXO1 expression, neuronal apoptosis rate, FOXO1 and Caspase-3 protein expression obviously decreased in the LV-miR-582-5p group, and the miR-582-5p expression obviously increased, the pathological damage of hippocampus tissue was obviously improved (P<0.05). LV-FOXO1 was able to reverse the protective effect of LV-miR-582-5p on neuronal damage in HIE rats. Conclusion MiR-582-5p can directly target FOXO1, negatively regulate FOXO1 expression, reduce neuronal apoptosis in HIE neonatal rats, and have a protective effect on neural injury.

Key words: hypoxia-ischemia, brain, trauma, nervous system, forkhead box protein O1, microRNA-582-5p

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