基于靶點網(wǎng)絡的中藥復方協(xié)同整合作用機制研究
[Abstract]:Traditional Chinese medicine is an important part of the treasure house of Chinese medicine. The systematic view and overall view of its treatment of diseases have been paid more and more attention by the scientific community. It is of great significance to systematically clarify the overall mechanism of the action of traditional Chinese medicine to promote the modernization of traditional Chinese Medicine and the development of modern medicine. The target points form complex networks and produce synergistic and integrated roles in different channels and functional modules. To reveal the scientific essence of this problem has become an urgent task in the study of traditional Chinese medicine. It mainly includes: developing a direct target prediction algorithm that conforms to the characteristics of traditional Chinese medicine in combination with computer technology and biological large data to find the target target of the Chinese medicine compound. Based on the target prediction method mentioned above, the multi pathway and multi level synergistic integration function of the compound are clarified from the target point of action path and function. In addition, the target point prediction method is also used. On the higher scale protein interaction network, the functional modules of the compound target network and the multi link regulation mechanism of the disease are explored. The specific contents include: (1) in order to identify the direct target of the compound Chinese medicine compound, this study is based on the real binding of the ligand target point on a large scale, and suggests that the characteristics of the ligand group ensemble can reflect its direct effect. A weighted ensemble similarity algorithm (WES) is constructed to predict the direct target.WES algorithm of the drug as follows: a) through the retrieval of different data sources, 98327 ligand target direct binding data sets are constructed, and b) identifies the key ligand structure highly related to the pharmacological properties under the ensemble framework. Parameters; c) through the overall similarity degree (ensemble similarity) rather than the similarity of single ligands to judge whether a drug can combine with a target; d) using the Bayesian network and multidimensional kernel to integrate the standardized ensemble similarity to make a theoretical prediction of the.WES model external test and experimental evaluation have a higher accuracy rate of 70% and 7, respectively. 1%. these results show that the WES method provides a reliable bioinformatics model for drug relocation and drug development. (2) based on the target prediction method mentioned above, the multi pathway and multi-level synergistic integration of the compound is clarified for the functional pathway and function angle of the target. Peony skin, rehmannia, pomegranate, pomegranate skin, Magnolia officinalis and trifoliate orange are illustrated as examples. The main results are as follows: a) 212 potential active components of the compound were obtained through the evaluation of drug resistance; b) was used as a probe to predict the target of these compounds with the help of WES algorithm, and through further in vitro The experiment verified the direct interaction of compounds and targets; c) compound target network and target point network association analysis elucidated the complex relationship between the macroscopic phenotype of the disease and the micromolecule (compound, protein, pathway), and screened the multiple pathways associated with the target of the Cape Gardenia compound, such as the Toll-like receptor signaling pathway and the Jak -STAT signal pathway; d) integration and analysis of target pathways to find multiple pathways of compound targets by inhibiting inflammation, antiviral infection and enhancing immune synergy; E) molecular function of compound targets, cell components and biological process analysis, revealing the multilevel regulation of compound compound. (3) in addition, this study was two Chen Tangwei. In the higher scale protein interaction network, the functional modules of the compound target network and the multi link regulation mechanism of the disease are explored. The main contents include: a) screening out 126 potential active components of two Chen Tangzhong through the evaluation of drug resistance; b) the compound target association was broken by the WES model. This study obtained the compound. The 448 target points directly reflect how compounds target specific target proteins and play a role in the formation of compound target network. C) integration of target interaction network and drug target network, and using modular analysis method to identify 11 modules with specific biological functions, and clarify the function module synergy in the compound target network. In summary, this study focuses on the synergistic integration of Chinese medicine compound target and its function network. A direct target prediction model conforms to the characteristics of traditional Chinese medicine. The model can quickly and effectively identify the target egg white of Chinese medicine compound, and provide the research of Chinese medicine compound mechanism and the research and development of new drugs. On this basis, on this basis, the target prediction and analysis of compound action target were carried out with the compound of Radix Astragali gardenia and two Chen Tang as an example. From the function of the target, the function pathway and the function module of the target network, the multi-channel, multi-level and multi link synergistic integration of the compound was clarified to provide the understanding of the overall mechanism of traditional Chinese medicine. A new reference.
【學位授予單位】:西北農(nóng)林科技大學
【學位級別】:博士
【學位授予年份】:2017
【分類號】:R285
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