白脉散有效成分组调控神经干细胞增殖的实验研究

Research on effect of Baimai powder effective compounds group promotes neurogenesis and maintains of neural stem cells after cerebral infarction

神经干细胞(NSCs)具有替代及修复受损神经组织的作用,研究发现能够通过调控NSCs内环境诱导其增殖分化,重塑神经功能,从而修复脑卒中神经病变等神经系统损伤。本实验研究了蒙药白脉散有效成分组(BMECG)激活NSCs增殖的药理学作用。通过建立体内外2种损伤模型,模拟脑卒中神经病变,分别利用流式细胞术、行为学检测、Nestin免疫组化等方法研究BMECG的脑保护作用机制。结果表明,BMECG能够显著提高体外培养NSCs增殖能力,有助于小鼠的行为学功能恢复,明显改善模型小鼠大脑皮层NSCs增殖能力。因此BMECG直接针对NSCs增殖存活能力发挥作用,可能是治疗脑卒中神经病变的机制之一,该药物具有重要的研究意义和广阔的应用前景。

The neural stem cells （NSCs）, play a crucial role in stroke treatment, which can be regulated by a few of traditional Chinese medicines. In this study, the effect of the Mongolian medicine Baimai powder effective compounds group （BMECG） on the proliferation of NSCs has been investigated. The cultured NSCs which were isolated from newborn rat cerebral cortical in vitro were exposed to oxygen glucose deprivation/reoxgenation（OGD/R）. The CFSE immunofluorescence staining was employed to identify the proliferation of NSCs by flow cytometry. Furthermore, the bilateral carotid artery occlusion （BCAO） was established on Kunming mice, and all groups were ig for 7 d respectively. The neurobehavioral changes was studied with rota-rod treadmill test, after that, the brain of mice were detected by immunohistochemistry with labeling of Nestin and pathological observation at 7 days after BCAO. It was found that, proliferation of NSCs was increased by BMECG in in vitro and in vivo. And BMECG significantly improved the time of staying in the rota-rod, it can promote the foundction of in cerebral cortex. It is concluded that these results further support the hypothesis that neuroprotective effect of BMECG may relate to the ability of stimulating self-renew of NSCs, which can be provided a new insight and strategy of anti-neuropathy of stroke.keywords：Baimai powder