ABSTRACT
Seventeen minor triterpenoid acids (1-17) were isolated from an aqueous decoction of Uncaria rhynchophylla by a combinatory application of column chromatography using multiple stationary phases, including macroporous adsorbent resin, MCI resin, Sephadex LH-20, Toyopearl HW-40C, silica gel, and C18 reversed phase silica gel, combined with separation techniques of flash chromatography (FC) and high performance liquid chromatography (HPLC). Their structures were determined by analysis of HR-ESI-MS, UV, CD, and IR as well as 1D and 2D NMR spectroscopic data, of which eight new compounds (1-8) are named successively uncarinic acids Q-X, while the structures of 2 and 7 were confirmed by single crystal X-ray diffraction. In the in vitro assays, 27-hydroxyolean-12-en-28-oic acid (17) inhibited TGF-β-induced HSC-T6 cell activation at the concentration of 5 μmol·L-1.
ABSTRACT
Qualitative and quantitative methods were used to establish the quality of different medicinal parts of Poria cocos (Poriae Cutis, rubra Poria, white Poria, Poria cum Radix Pini) by using ultra-performance convergence chromatography coupled with photo-diode array and quadrupole time-of-flight mass spectrometry (UPC2-PDA-Q-TOF/MSE). A total of 18 chromatographic peaks were detected from Poria cocos by UPC2-PDA. Principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) were used to compare the four medicinal parts. The results showed that there were significant differences in the components of different medicinal parts, and the main triterpenoic acids were poricoic acid A, poricoic acid B, dehydroeburicoic acid, and dehydrotrametenolic acid. When combined with the common active component polyporenic acid C, a method for determination of five triterpenoic acids in different parts of Poria cocos was established. These components could be separated within 15 min, and the amount of methanol was 3.63% of that of HPLC method. Taking the five triterpenoid acids as an index, the content of triterpenoid acids in different parts of Poria cocos from high to low were Poriae Cutis, rubra Poria, white Poria and Poria cum Radix Pini. The method is simple, rapid, and uses minimal solvent. The mobile phase of environment-friendly gas carbon dioxide has unique advantages in reducing environmental pollution, which can provide a basis for the development and standard formulation of Poria cocos and its related products.
ABSTRACT
Two new lanostane triterpenoid acids, 12β, 15α-dihydroxy-24-methyl-3,23-dioxo-lanosta-7,9(11)-dien-26-oic acid (1), and 3α, 12β-dihydroxy-24-methyl-7,23-dioxo-lanosta-8-en-26-oic acid (2), were isolated from the methanolic extract of Uighur medicine Fomes officinalis. Their structures were elucidated based on the analysis of spectroscopic data (1D, 2D NMR and HR-MS). Anti-inflammatory and cytotoxicity assays revealed that both compound 1 and 2 show no inhibitory effects on nitric oxide production in lipopolysaccharide-induced RAW264.7 cells, and no cytotoxicity activities against HepG2 cells.
ABSTRACT
OBJECTIVE: To optimize the extraction and purification process of total triterpenoid acid in Ligustri lucidi fructus using response surface method and uniform test. Finally, the content of total triterpenoid acid reached more than 50%. METHODS: The content determination of total triterpenoid acid in Ligustri lucidi fructus was established by HPLC. Use ethanol as extraction solvent and through the single factor investigation about the ethanol concentration, solvent amount, extraction time and extraction times, we determined the number of ethanol extraction. In addition to extraction times, the other three factors were further optimized by response surface method. Then purified by the alcohol extraction-water precipitation method to remove the water-soluble ingredients. Petroleum ether was used to remove the chlorophyll, grease and other small polarity ingredients; using ethanol to remove the alcohol soluble components whose polarity is bigger than fructus ligustri lucidi terpene acids. Design the uniform experiment respectively to determine the amount of petroleum ether, frequency and time, also ethanol concentration and dosage. RESULTS: The content of oleanolic acid and ursolic acid is larger than other compounds in total triterpenoid acid in Ligustri lucidi fructus, and they are isomers. When the results are in the equivalent of oleanolic acid, the optimum extraction process was determined as 80%, 10 times the amount of ethanol, extracting for 2 times, each time 0.5 h. The optimal purification process is 12 times the amount of petroleum ether, purified once, 2 h every time. Then 10 times amount of 60% ethanol to purify for once. CONCLUSION: Optimizing the extraction and purification process of total triterpenoid acid in Ligustri lucidi fructus by using response surface method and uniform experiment is simple, feasible and worth promoting.