Objective:To analyze the main chemical components of Lanqin Granules based on UPLC-Q-TOF-MS/MS; To explore the potential targets, core components and related pathways of Lanqin Granules in the treatment of respiratory tract infection through network pharmacology.Methods:Using UPLC-Q-TOF-MS/MS secondary fragment cleavage information, combined with literature and database, the chemical components of Lanqin Granules were analyzed; the related action targets of Lanqin Granules were obtained by PharmMapper; The related targets of respiratory tract infection were obtained from GeneCards and OMIM databases, and the common targets were selected by intersection with the relevant action targets of Lanqin Granules. The common targets were imported into string database, and the protein interaction data were downloaded and input into Cytoscape 3.7.2 software to obtain hub gene; Go function and KEGG pathway enrichment analysis were carried out on DAVID platform, and chemical components closely related to hub gene were obtained by using the Network Anlyzer plug-in.Results:53 chemical constituents of Lanqin Granules were obtained, including 11 alkaloids, 20 flavonoids, 5 terpenoids, 7 organic esters, 2 amino acids and 8 other compounds. 28 hub genes and 38 related core components were obtained. The results of GO analysis showed that the treatment of respiratory tract infection with Lanqin Granules was related to neutrophil degranulation, negative regulation of apoptosis, protein hydrolysis and other biological processes; extracellular exosomes, cytoplasm, extracellular components and other cellular components; the same protein binding, RNA polymerase Ⅱtranscription factor activity, ligand activated sequence specific DNA binding, protein serine/ threonine/ tyrosine kinase activity and other molecular processes. KEGG analysis results mainly involved cancer pathway, lipid and atherosclerosis, metabolic pathway and other signaling pathways.Conclusion:Lanqin Granules can treat respiratory tract infection through multi-component, multi-target and multi-channel, and play the role of anti-inflammatory, antibacterial and anti-virus.

During the development of therapeutic microRNAs (miRNAs or miRs), it is essential to define their pharmacological actions. Rather, miRNA research and therapy mainly use miRNA mimics synthesized in vitro. After experimental screening of unique recombinant miRNAs produced in vivo, three lead antiproliferative miRNAs against human NSCLC cells, miR-22-3p, miR-9-5p, and miR-218-5p, were revealed to target folate metabolism by bioinformatic analyses. Recombinant miR-22-3p, miR-9-5p, and miR-218-5p were shown to regulate key folate metabolic enzymes to inhibit folate metabolism and subsequently alter amino acid metabolome in NSCLC A549 and H1975 cells. Isotope tracing studies further confirmed the disruption of one-carbon transfer from serine to folate metabolites by all three miRNAs, inhibition of glucose uptake by miR-22-3p, and reduction of serine biosynthesis from glucose by miR-9-5p and -218-5p in NSCLC cells. With greater activities to interrupt NSCLC cell respiration, glycolysis, and colony formation than miR-9-5p and -218-5p, recombinant miR-22-3p was effective to reduce tumor growth in two NSCLC patient-derived xenograft mouse models without causing any toxicity. These results establish a common antifolate mechanism and differential actions on glucose uptake and metabolism for three lead anticancer miRNAs as well as antitumor efficacy for miR-22-3p nanomedicine, which shall provide insight into developing antimetabolite RNA therapies.

Larotaxel, a new taxane compound prepared by partial synthesis from 10-deacetyl baccatin Ⅲ, is active against tumors. In this research, a selective LC–MS method was developed and validated for the study of degradation kinetics of larotaxel, which was carried out in aqueous solutions with different pH (1.5, 3.0, 5.0, 6.5, 7.4, 9.0, 10 and 11.0) and temperature (0, 25, 37 and 45 °C). The linear range was 0.5–25μg/mL, the intra-and inter-day precisions were less than 7.0%, and accuracy ranged from 97.4–104.5% for each analyte. The observed rate obtained by measuring the remaining intact larotaxel was shown to follow first-order kinetics. The activation energies for degradation were 126.7 and 87.01 kJ/mol at pH 1.5 and 11, respectively. Although larotaxel was stable in pH 5, 6.5 and 7.4 buffers at 37 °C for 24 h during our study, increasing or decreasing the pH of the solutions would decrease its stabilities. Moreover, three main degradation products in alkaline condition were separated by HPLC and identified by Q–TOF–MS. The three degradation products were confirmed as 10-deacetyl larotaxel, 7, 8-cyclopropyl baccatin Ⅲ and 10-deacetyl-7, 8-cyclopropyl baccatin Ⅲ.

AIM:To determine the optimal extraction of effective component from Swertia chirayita(Roxb.ex Flemi) Karsten in Tibet. METHODS: HPLC method was used to determine the yield rate and mango glucoside content,the preference extract methods,extraction solvents and extraction method of Swertia chirayita(Roxb.ex Flemi) Karsten were chose by parallel comparative method. RESULTS: 75% ethanol was used to extract medicine materials by Percolate,the flow rate was 4 mL/min/kg,collecting 6 times liquor after percolate. CONCLUSION: The extraction method is simple and convenient,furthermore the extract stability is good too.