Two new acylphloroglucinol-nerolidol meroterpenoids (APNMs) [(±)-1 and (±)-2], with a skeleton of mixed sesquiterpene and dimeric acylphloroglucinol biosynthetic origin, were isolated from the medicinal pteridophyte . Inspired by the proposed biosynthetic pathway, we initially completed the biomimetic syntheses of eight optically active APNMs (1-8) in a one-pot domino reaction. The structures of APNMs 1-8 including their absolute configurations were unambiguously established by a combination of NMR analysis, ECD calculations, and synthetic methods.
View Article and Find Full Text PDFTwo new meroterpenoids, arneuchrols A and B (1 and 2), together with twelve known analogs (3-14) were isolated from the root of Arnebia euchroma. The structures of 1 and 2 including their absolute configurations were elucidated by NMR, HRESIMS, and DFT calculation of their NMR and ECD data. The structure of pseudoshikonin I, firstly isolated from Lithospermi radix was revised as shikonofuran E (4).
View Article and Find Full Text PDFBackground: Bladder cancer is a urological carcinoma with high incidence, among which muscle invasive bladder cancer (MIBC) is a malignant carcinoma with high mortality. There is an urgent need to develop new drugs with low toxicity and high efficiency for MIBC because existing medication has defects, such as high toxicity, poor efficacy, and side effects. Jorunnamycin A (JorA), a natural marine compound, has been found to have a high efficiency anticancer effect, but its anticancer function and mechanism on bladder cancer have not been studied.
View Article and Find Full Text PDFBladder cancer, specifically, muscle-invasive bladder cancer (MIBC), is among the most common malignant tumors. Patients with MIBC who cannot tolerate standard drugs require novel treatments. Targeting apoptosis may help treat cancer, which may be achieved with the use of some natural products.
View Article and Find Full Text PDFColorectal cancer (CRC) is one of the most common digestive system cancer in the world. Its incidence and mortality are increasing annually. Presently, CRC lacks long-term effective treatment methods and drugs.
View Article and Find Full Text PDFColorectal cancer (CRC) is one of the most common cancers worldwide but has limited available therapeutic methods; therefore, there is a need to develop highly efficient prevention and treatment strategies. Here, we investigated the anti-cancer activity of β-elemonic acid (EA) in CRC and . Our results showed that EA inhibited cell proliferation and migration in the CRC cell lines SW480 and HCT116.
View Article and Find Full Text PDFTo compare the pharmacokinetics of syringin, eleutheroside E and isofraxidin after intravenous administration of each monomer and Ciwujia injection. Twenty-four Sprague-Dawley rats were randomly divided into four groups and intravenously administrated with syringin, eleutheroside E, isofraxidin, and Ciwujia injection, respectively. The concentrations of the three components in rat plasma were determined by LC-MS/MS.
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
June 2014
To establish a method for the determination of cucurbitacin in plasma samples, in order to study the in vivo pharmacokinetic characteristics of cucurbitacin in rats. Rats were intravenously injected with cucurbitacin. With diphenhydramine as the internal standard (IS), the plasma concentrations of cucurbitacin in rat plasma at different time points were determined by liquid chromatography tandem mass spectrometry (LC-MS/MS).
View Article and Find Full Text PDFPorcine transmissible gastroenteritis virus (TGEV) is the causative agent of acute diarrhea of newborn piglets that provokes high mortality rates in affected farms. In this study, specific immunoglobulin from egg yolk against TGEV was produced by immunization of White leghorn hens. Enzyme-linked immunosorbent assay (ELISA) and virus neutralization (VN) test revealed that the specific antibody titer started to increase on the tenth day post-immunization, reached its peak on the eighth week, and remained at a high level until the last week that we tested.
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