目的龙江医派知名医家陈景河先生的益脑通络方在临床上治疗缺血性中风效果明显,但是其治疗机制方面的研究尚浅。文章基于中医药整合药理学研究平台(Integrative Pharmacology-based Research Platform of Traditional Chinese Medicine,...目的龙江医派知名医家陈景河先生的益脑通络方在临床上治疗缺血性中风效果明显,但是其治疗机制方面的研究尚浅。文章基于中医药整合药理学研究平台(Integrative Pharmacology-based Research Platform of Traditional Chinese Medicine,TCMIP)探讨益脑通络方治疗缺血性中风的分子机制。方法利用该平台筛选方剂的活性成分并预测其靶点;基于方剂靶点与疾病靶点的匹配结果筛选方剂-疾病的关键靶点,并对关键靶点进行基因本体论(gene ontology,GO)功能、生物过程(Reactome)富集分析;通过构建蛋白互作网络(protein-protein interaction network,PPI)、构建“中药-成分-靶点-通路”网络,分析并筛选益脑通络方治疗缺血性中风的主要活性成分和核心靶点;进一步对核心靶点与主要活性成分进行分子对接,以虚拟验证其结合能力并分析其结合模式。对核心活性成分和核心靶点进行分子对接验证。结果获得益脑通络方治疗缺血性中风的主要活性成分40种,关键靶点18个,包括了APP、PIK3CA等,GO功能分析主要富集在对凋亡的调控上,Reactome信号通路涉及了凋亡途径、炎症途径、基因调控、血管通路、神经再生、突触传导、细胞自噬等多途径。分子对接结果显示主要活性成分与核心靶蛋白具有结合力,川芎的萘呋内酯结合能力最强。结论益脑通络方中的萘呋内酯等多种活性成分能够作用于APP、PIK3CA等多靶点、通过促红细胞生成素(erythropietin,EPO)激活的PI3K等多通路,在缺血性中风中主要发挥抗凋亡等作用。展开更多
A neural network method for independent source separation (ISS) of multichannel electroencephalogram (EEG) is proposed in this paper.Using the denoising function of wavelet multiscale decomposition,the high-frequency ...A neural network method for independent source separation (ISS) of multichannel electroencephalogram (EEG) is proposed in this paper.Using the denoising function of wavelet multiscale decomposition,the high-frequency noises are removed from the original (raw) EEGs.Then the multichannel EEGs are treated as the weighted mixtures and the expression of weight vector is obtained by seeking the local extrema of the fourth-order cumulants (i.e.kurtosis coefficients) of the mixtures.After these process steps,the weighted mixtures are used as the input of neural network,so the independent source of EEGs can be separated one by one.The experimental results show that our method is effective for ISS of multichannel EEGs.展开更多
文摘目的龙江医派知名医家陈景河先生的益脑通络方在临床上治疗缺血性中风效果明显,但是其治疗机制方面的研究尚浅。文章基于中医药整合药理学研究平台(Integrative Pharmacology-based Research Platform of Traditional Chinese Medicine,TCMIP)探讨益脑通络方治疗缺血性中风的分子机制。方法利用该平台筛选方剂的活性成分并预测其靶点;基于方剂靶点与疾病靶点的匹配结果筛选方剂-疾病的关键靶点,并对关键靶点进行基因本体论(gene ontology,GO)功能、生物过程(Reactome)富集分析;通过构建蛋白互作网络(protein-protein interaction network,PPI)、构建“中药-成分-靶点-通路”网络,分析并筛选益脑通络方治疗缺血性中风的主要活性成分和核心靶点;进一步对核心靶点与主要活性成分进行分子对接,以虚拟验证其结合能力并分析其结合模式。对核心活性成分和核心靶点进行分子对接验证。结果获得益脑通络方治疗缺血性中风的主要活性成分40种,关键靶点18个,包括了APP、PIK3CA等,GO功能分析主要富集在对凋亡的调控上,Reactome信号通路涉及了凋亡途径、炎症途径、基因调控、血管通路、神经再生、突触传导、细胞自噬等多途径。分子对接结果显示主要活性成分与核心靶蛋白具有结合力,川芎的萘呋内酯结合能力最强。结论益脑通络方中的萘呋内酯等多种活性成分能够作用于APP、PIK3CA等多靶点、通过促红细胞生成素(erythropietin,EPO)激活的PI3K等多通路,在缺血性中风中主要发挥抗凋亡等作用。
基金Natural Science Foundation of Fujian Province of Chinagrant number:C0710036 and T0750008
文摘A neural network method for independent source separation (ISS) of multichannel electroencephalogram (EEG) is proposed in this paper.Using the denoising function of wavelet multiscale decomposition,the high-frequency noises are removed from the original (raw) EEGs.Then the multichannel EEGs are treated as the weighted mixtures and the expression of weight vector is obtained by seeking the local extrema of the fourth-order cumulants (i.e.kurtosis coefficients) of the mixtures.After these process steps,the weighted mixtures are used as the input of neural network,so the independent source of EEGs can be separated one by one.The experimental results show that our method is effective for ISS of multichannel EEGs.