The application of modern data,such as the use of databases and artificial intelligence,can quickly process information and integrate accuracy.Now many online resource websites have become an indispensable tool for our scientific research and speed up our work needs. Databases like TCGA[24] and oncomine[25] are the two major databases that we commonly use. But in the end it still depends on the repeated demonstration of experimental data.
Plant extracts are now an important source for our treatment of diseases[26, 27],and many countries have invested huge amounts of money in the development of extracts to treat cancer. Paeoniflorin is used as an extract of Ranunculaceae, Peony, and Purple Peony[28].The compound structure was showned in Fig. 1,and many factors should be considered,such as half-life, indicating the continuous effect of the drug,and oral bioavailability to prove the biological activity of the smolecule[29].The blood-brain barrier should be considered first in brain diseases treatments[30]. According to Lipinski's five-point ruleto determine the choice of drugs[31],the recommended choice for oral drugs was molecular weight < 500, Logp < 5.The number of hydrogen-bonded donors and acceptors was less than 5 and 10,respectively(Table 1).Among the drugs we selected, paeoniflorin’Hacc values > 10,but other parameters meet the pharmacokinetics of oral drugs.Therefore, we still consider paeoniflorin as a new drug option and a new target need to be explored deeply.
After determining the pharmacokinetic properties of a drug,we needed to find the target genes for drug action.Many articles had shown that compounds extracted from plants were inextricably linked to genes or proteins[32–34].To this end,we used CTD to predict 28 genes online(Table 2). Since 6 genes had been reported in our previous research,a total of 34 target genes were in our study.To further explored the function of these 34 genes,we used the GeneMANIA online tool to prove their co-expression,physical communication,co-localization and other functional information(Fig. 2). In addition, through the establishment of protein interactions, we also found 20 interesting genes related to the query genes. For example, the key role of RPTOR in breast cancer[35], the low expression of VDAC1 in cholangiocarcinoma is closely related to the overall survival rate[36]. CREBBP inactivation is associated with HDAC3-dependent lymphoma[37]. so above results suggested that strong relationship and identical functions between above targets genes and further more related targets genes need to be explored.
Then we performed GO analysis and KEGG analysis on 34 target genes(Fig. 3A,B).We found that most of genes were related to the response to immune, Cancer immunotherapy is a breakthrough in cancer, such as cytokine therapy[34]. previous articles have confirmed the inflammation and immunity of paeoniflorin in diseases such as rheumatoid[38], allergic asthma[39] and arthritis[40]. In addition, the GO analysis results also explain that paeoniflorin is also involved in cell migration[17, 41], cell activation, and cell activity regulation. and KEGG analysis indicated that multiple pathway correlated to paeoniflorin,especially HIF-1 signaling pathway Especially HIF-1 signaling pathway actively participates in the progress of various cancers[42, 43], These results are very consistent with our results from GO and KEGG analysis, suggesting that paeoniflorin has full potential as a cancer treatment.
In order to express paeoniflorin,34 target genes,and their respective disease pathways more intuitively,we used cytoscape to construct a drug-gene-pathway network(Fig. 4). paeoniflorin links 34 target genes,and 34 target genes link 1064 disease pathways. Figure 4 shows that paeoniflorin is a multi-target compound. in the treatment of cancer, multi-target therapy is usually the only choice, effectively improving the efficiency of treatment. Establishing a drug-targets-pathway network to visualize the pharmacological activity of paeoniflorin. For example, breast cancer[44], colorectal cancer[45], glioma[17], pancreatic cancer[46], multi-target potential mechanisms are usually our exploration targets for cancer research. Therefore, paeoniflorin may be a promising resource for use as a chemical moiety or active ingredient for future drug discovery.