蝙蝠葛苏林碱通过拮抗缓激肽诱导的胞内钙升高发挥神经保护作用
摘要
目的:研究蝙蝠葛苏林碱(DS)对缓激肽(BK)诱导神经细胞胞内钙升高的影响,并探讨其神经保护作用。方法:原代培养大鼠皮质神经元,应用BK(1μmol/L)诱导细胞内钙离子浓度升高;将细胞分为对照组,BK组,DS低、中、高剂量组;对照组不做任何处理,BK组给予1μmol/L的BK处理,DS低、中、高剂量组分别给予相应浓度(1×10~(-6)mol/L、1×10~(-5)mol/L、1×10~(-4)mol/L)的DS预孵育3 min,然后给予1μmol/L的BK处理。通过细胞内双波长荧光钙成像系统观察胞内游离钙离子的变化,采用MTT染色法检测神经元的损伤程度。结果:BK诱导可迅速升高原代培养大鼠皮质细胞内的钙离子水平。DS干预可部分逆转BK对胞内钙离子升高的影响(P<0.05)。MTT结果显示,BK组神经元存活率明显低于对照组(P<0.05);DS低、中、高剂量组的存活率均高于BK组(P<0.05)。结论:DS可拮抗缓激肽诱导的细胞内钙升高,对胞内钙紊乱所致的神经细胞损伤具有一定保护作用。
引文
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