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1.400038 重庆,陆军军医大学(第三军医大学)附属第一医院神经外科
2.710032 西安,空军军医大学附属第一医院急诊科
[朱刚,E-mail: gangzhu6666@sina.comZHU Gang, E-mail: gangzhu6666@sina.com
收稿:2019-09-15,
修回:2019-10-11,
纸质出版:2019-11-30
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耿军军, 唐俊, 王莉莉, 等. 抑制补体C3/C3aR信号可改善新生大鼠脑生发基质出血后脑积水[J]. 第三军医大学学报, 2019,41(22):2137-2145.
Junjun GENG, Jun TANG, Lili WANG, et al. Inhibition of complement C3/C3aR alleviates hydrocephalus following germinal matrix hemorrhage in neonatal rats[J]. Journal of Third Military Medical University, 2019, 41(22): 2137-2145.
耿军军, 唐俊, 王莉莉, 等. 抑制补体C3/C3aR信号可改善新生大鼠脑生发基质出血后脑积水[J]. 第三军医大学学报, 2019,41(22):2137-2145. DOI: 10.16016/j.1000-5404.201909112.
Junjun GENG, Jun TANG, Lili WANG, et al. Inhibition of complement C3/C3aR alleviates hydrocephalus following germinal matrix hemorrhage in neonatal rats[J]. Journal of Third Military Medical University, 2019, 41(22): 2137-2145. DOI: 10.16016/j.1000-5404.201909112.
目的
2
研究补体C3/C3aR信号介导的小胶质细胞-星型胶质细胞交互作用对新生大鼠脑生发基质出血(germinal matrix hemorrhage,GMH)后脑积水的影响。
方法
2
检测胶原酶(Ⅶ-S型)诱导新生大鼠GMH后脑室周围C3和C3aR的表达。给予GMH大鼠C3aR拮抗剂(complement C3 receptor antagonist,C3aRA)处理,观察C3aRA对大鼠脑积水(MRI检查)、学习记忆功能(水迷宫实验)和炎症反应(IL-1β、IL-6、TNF-α、TGF-β1和水通道蛋白4)的影响。
结果
2
GMH后脑室周围补体C3和C3aR表达上调,炎症因子IL-1β、IL-6、TNF-α、TGF-β1表达增加,星形胶质细胞表面的水通道蛋白4异位表达且表达增加,脑室扩张,脑皮质和海马受压,大鼠学习记忆功能下降。阻断C3/C3aR信号后,相应C3、C3aR表达减低,炎症因子分泌减少,脑室扩张程度及皮层/海马受压减轻,大鼠神经功能明显改善。
结论
2
GMH后星形胶质细胞上调并释放C3
C3与小胶质细胞表面的C3aR结合促进炎症反应,加重脑积水。星形胶质细胞表面水通道蛋白4的异位表达可能对GMH后脑积水产生起重要作用。
Objective
2
To investigate the effect of astrocyte-microglia crosstalk mediated by complement C3/C3aR signaling on hydrocephalus after germinal matrix hemorrhage (GMH) in newborn rats.
Methods
2
GMH was induced in post-natal day 7 SD rats by collagenase Ⅶ-S injection into the ganglionic eminence. We detected the changes in the expression of periventricular C3 and C3aR over time after GMH
and observed the effect of intraperitoneal injection of C3aRA (a selective C3aR antagonist) on hydrocephalus using magnetic resonance imaging (MRI). The learning and memory functions of the rats were tested after the treatment using Morris water maze test
and the expression of interleukin-1β (IL-1β)
IL-6
tumor necrosis factor-α (TNF-α)
transforming growth factor-β1 (TGF-β1) and aquaporin 4 in the brain tissues were detected using Western blotting at different time points after GMH.
Results
2
The neonatal rats with GMH showed significantly up-regulated expression of C3 and C3aR around the cerebral ventricles and increased expression of IL-1β
IL-6
TNF-α and TGF-β1 in the brain
presenting also with obvious lateral ventricle dilation
compression of the cortex and hippocampus
and impairment of the learning and memory functions. Treatment of the rats with C3aRA obviously decreased C3 and C3aR expression
alleviated hydrocephalus
improved the neurological deficits
and reduced the expression of the inflammatory factors in the brain. GMH caused obvious ectopic expression of aquaporins 4 and increased its expression level on the astrocytes
and C3aRA treatment significantly improved the abnormal expression of aquaporins 4.
Conclusion
2
GMH causes the astrocytes to up-regulate and release C3
which binds to C3aR on the microglia to promote inflammation and aggravate hydrocephalus. The ectopic expression of aquaporin 4 in astrocytes may play an important role in the occurrence of hydrocephalus following GMH.
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