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A novel fast high-performance liquid chromatography (HPLC) method coupled with diode array detection (DAD) and time-of-flight mass spectrometry (TOF/MS) was developed for qualitative and quantitative analysis of Radix Astragali products. The potential of fast HPLC on 1.8-microm particles was compared with the performance of HPLC on conventional 5-microm(More)
Colorectal carcinogenesis is a complex, multistep process involving genetic alterations and progressive changes in signaling pathways regulating intestinal epithelial cell proliferation, differentiation, and apoptosis. Although cyclooxygenase-2 (COX-2), gastrin-releasing peptide (GRP), and its receptor, GRP-R, are not normally expressed by the epithelial(More)
INTRODUCTION The whole herb of Potentilla discolor has long been used for treatment of diarrhoea, malaria, haemoptysis and haematemesis in clinical applications. However, until now, there has been no literature regarding to the quality control of it. OBJECTIVE To develop a simple and accurate HPLC-DAD (diode array detection)-ESI/MS(n) (electrospray(More)
A rapid high-performance liquid chromatography-mass spectrometry (HPLC-MS) method was developed and validated for simultaneous quantification of 6-gingerol, 8-gingerol, 10-gingerol and 6-shogaol in rat plasma after oral administration of ginger oleoresin. Plasma samples extracted with a liquid-liquid extraction procedure were separated on an Agilent Zorbax(More)
BACKGROUND AND PURPOSE This study aims to investigate whether and how pharmacological activation of AMP-activated protein kinase (AMPK) improves endothelial function by suppressing mitochondrial ROS-associated endoplasmic reticulum stress (ER stress) in the endothelium. Experimental approach Palmitate stimulation induced mitochondrial fission and ER(More)
AIM OF THE STUDY Potentilla discolor Bunge, commonly found at the north temperate and boreal zone, has been used for diabetes in China for a long time. Flavonoids and triterpenoids are two major types of compounds in P. discolor. This study was designed primarily to investigate the effects of total flavonoids extract (TFE) and total triterpenoids extract(More)
An improved quality control method was developed to simultaneously determine 15 major constituents (eight flavonoids and seven saponins) in various radix Astragali preparations, using SPE for pretreatment of samples, HPLC with diode-array and evaporative light scattering detectors (DAD-ELSD) for quantification in one run, and HPLC-ESI-TOF/MS for definite(More)
A sensitive and reliable high-performance liquid chromatography-mass spectrometry (HPLC-MS) was developed and validated for simultaneous quantification of five main bioactive components, i.e., calycosin-7-O-beta-D-glucoside, ononin, astragaloside IV, astragaloside I and ferulic acid in rat plasma after oral administration of Danggui Buxue Tang (DBT)(More)
Ilexgenin A is a natural triterpenoid with beneficial effects on lipid disorders. This study aimed to investigate the effects of ilexgenin A on endothelial homeostasis and its mechanisms. Palmitate (PA) stimulation induced endoplasmic reticulum stress (ER stress) and subsequent thioredoxin-interacting protein (TXNIP)/NLRP3 inflammasome activation in(More)
Compound K (20-O-beta-D-glucopyranosyl-20(S)-protopanaxadiol, CK), an intestinal bacterial metabolite of ginseng protopanaxadiol saponins, has been shown to inhibit cell growth in a variety of cancers. However, the mechanisms are not completely understood, especially in colorectal cancer (CRC). A xenograft tumor model was used first to examine the anti-CRC(More)