Suppr超能文献

中风通过降低附近移植神经干细胞的半胱天冬酶3激活水平来促进其存活,而不影响其分化。

Stroke promotes survival of nearby transplanted neural stem cells by decreasing their activation of caspase 3 while not affecting their differentiation.

作者信息

Kosi Nina, Alić Ivan, Salamon Iva, Mitrečić Dinko

机构信息

Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia.

Croatian Institute for Brain Research, University of Zagreb School of Medicine, Zagreb, Croatia; Faculty of Veterinary Medicine, University of Zagreb, 10 000 Zagreb, Croatia and Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.

出版信息

Neurosci Lett. 2018 Feb 14;666:111-119. doi: 10.1016/j.neulet.2017.12.040. Epub 2017 Dec 24.

Abstract

Although transplantation of stem cells improves recovery of the nervous tissue, little is known about the influence of different brain regions on transplanted cells. After we confirmed that cells with uniform differentiation potential can be generated in independent experiments, one million of neural stem cells isolated from B6.Cg-Tg(Thy1-YFP)16Jrs/J mouse embryos were transplanted into the brain 24 h after induction of stroke. The lateral ventricles, the corpus callosum and the striatum were tested. Two and four weeks after the transplantation, the cells transplanted in all three regions have been attracted to the ischemic core. The largest number of attracted cells has been observed after transplantation into the striatum. Their differentiation pattern and expression of neuroligin 1, SynCAM 1, postsynaptic density protein 95 and synapsin 1 followed the same pattern observed during in vitro cultivation and it did not differ among the tested regions. Differentiation pattern of the cells transplanted in the stroke-affected and healthy animals was the same. On the other hand, neural stem cells transplanted in the striatum of the animals affected by stroke exhibited significantly increased survival rates reaching 260 ± 19%, when compared to cells transplanted in their wild type controls. Surprisingly, improved survival two and four weeks after transplantation was not due to increased proliferation of the grafted cells and it was accompanied by decreased levels of activity of Casp3 (19.56 ± 3.1% in the stroke-affected vs. 30.14 ± 2.4% in healthy animals after four weeks). We assume that the decreased levels of Casp3 in cells transplanted near the ischemic region was linked to increased vasculogenesis, synaptogenesis, astrocytosis and axonogenesis detected in the host tissue affected by ischemia.

摘要

尽管干细胞移植可改善神经组织的恢复,但不同脑区对移植细胞的影响却知之甚少。在我们通过独立实验证实可以产生具有均匀分化潜能的细胞后,从B6.Cg-Tg(Thy1-YFP)16Jrs/J小鼠胚胎中分离出的100万个神经干细胞在中风诱导后24小时被移植到大脑中。对侧脑室、胼胝体和纹状体进行了检测。移植后两周和四周,移植到所有三个区域的细胞都被吸引到缺血核心。移植到纹状体后观察到的被吸引细胞数量最多。它们的分化模式以及神经连接蛋白1、突触细胞粘附分子1、突触后致密蛋白95和突触素1的表达遵循了在体外培养过程中观察到的相同模式,并且在测试区域之间没有差异。在中风影响的动物和健康动物中移植的细胞的分化模式是相同的。另一方面,与移植到野生型对照动物中的细胞相比,移植到中风影响动物纹状体中的神经干细胞存活率显著提高,达到260±19%。令人惊讶的是,移植后两周和四周存活率的提高并非由于移植细胞增殖增加,并且伴随着Casp3活性水平的降低(四周后,中风影响的动物中为19.56±3.1%,健康动物中为30.14±2.4%)。我们推测,在缺血区域附近移植的细胞中Casp3水平的降低与在受缺血影响的宿主组织中检测到的血管生成、突触形成、星形胶质细胞增生和轴突形成增加有关。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验