摘要
目的探讨蛇床子素(osthole,Ost)对感染APP(amyloid precursor protein)基因的神经元突触的保护作用及其机制。方法将培养的神经元分为对照组(感染GFP组)、模型组(感染APP组)和给药组(Ost+APP组)。通过感染含有突变位点的APP基因来模拟阿尔茨海默病,CCK-8法检测神经元的存活能力,免疫荧光化学法对突触素-1(synapsin-1,SYN)染色,ELISA法检测神经元突触内突触后膜蛋白-95(PSD-95)和突触体素(synaptophysin,SYP)蛋白的浓度,Western blot法检测Aβ1-42、钙调蛋白激酶激酶2(calcium/calmodulin-dependent protein kinase kinase 2,CAMKK2)、磷酸化单磷酸腺苷活化蛋白激酶α1(5’-adenosine monophosphate-activated protein kinaseα1,p-AMPKα1)、AMPKα1的蛋白表达。结果感染APP的神经元显现较强的APP阳性,并生成有神经毒性的Aβ1-42。与模型组比较,给药组明显增强神经细胞的存活能力,增加synapsin-1的表达量,提高PSD-95和SYP的浓度,降低CAMKK2、p-AMPKα1蛋白的表达。结论蛇床子素对感染APP基因的神经元突触造成的损伤具有保护作用,此神经保护作用可能是与抑制CAMKK2/AMPK信号通路有关。
Aim To investigate the effect of osthole on neuron synapses infected APP gene and its underlying mechanism. Methods The neurons were divided into three groups:GFP, APP, APP+Ost groups. The neu-rons were infected APP gene with containing mutational site in vitro for mimicking the characterstics of Alzhei-mer’ s disease ( AD) . The cell viability was assessed by CCK-8 , the expression of synapsin-1 was deter-mined by immunofluorescence, and the concentration of PSD-95 and SYP were detected by ELISA. The ex-pressions of Aβ1-42 , CAMKK2 , phoshorylated AMPKα1 , AMPKα1 protein were determined by West-ern blot. Results Strong APP staining was visible in neurons infected with APP and abundant expression of Aβ1-42 , a neurotoxic oligomer. Compared with APP group, APP+Ost group significantly increased cell vi-ability, promoted the expression of synapsin-1, up-reg-ulated the concentration of PSD-95 and SYP, and de-creased the expressions of CAMKK2 and p-AMPKα1 . Conclusions Ost can protect the neuron synapses a-gainst infected with APP gene. Its neuroprotective effect may be related to inhibiting the CAMKK2/AMPK signal pathway.
出处
《中国药理学通报》
CAS
CSCD
北大核心
2015年第10期1383-1388,共6页
Chinese Pharmacological Bulletin
基金
国家自然科学基金面上项目(No 81173580)
