Objectives: Polymyxins are currently the last-resort treatment against multi-drug resistant Gram-negative bacterial infections, but plasmid-mediated mobile polymyxin resistance genes (mcr) threaten its efficacy, especially in carbapenem-resistant Enterobacter cloacae complex (CRECC). The objective of this study was to provide insights into the mechanism of polymyxin-induced bacterial resistance and the effect of overexpression of mcr-9.
Methods: The clinical strain CRECC414 carrying the mcr-9 gene was treated with a gradient concentration of polymyxin.
Environ Sci Pollut Res Int
February 2024
Disinfection is an important step in deep drinking water treatment technology. This study applies computational fluid dynamics to investigate and optimize the hydrodynamics inside the ozone contactor. ANSYS Fluent was used to solve all the control equations.
View Article and Find Full Text PDFMalignancies such as bladder urothelial carcinoma, colon adenocarcinoma, liver hepatocellular carcinoma, lung adenocarcinoma and prostate adenocarcinoma significantly impact men's well-being. Accurate cancer classification is vital in determining treatment strategies and improving patient prognosis. This study introduced an innovative method that utilizes gene selection from high-dimensional datasets to enhance the performance of the male tumor classification algorithm.
View Article and Find Full Text PDFEur J Pharmacol
November 2023
Pathological cardiac hypertrophy can lead to heart failure, making its prevention crucial. SOX4, a SOX transcription factor, regulates tissue growth and development, although its role in pathological cardiac hypertrophy is unclear. We found that the SOX4 expression was elevated in hypertrophic hearts and angiotensin II (Ang II)-treated neonatal rat cardiomyocytes (NRCMs), and knocking down the SOX4 expression in NRCMs and mouse hearts significantly reduced the hypertrophic response.
View Article and Find Full Text PDFBackground: Bladder cancer, predominantly affecting men, is a prevalent malignancy of the urinary system. Although platinum-based chemotherapy has demonstrated certain enhancements in overall survival when compared to surgery alone, the efficacy of treatments is impeded by the unfavorable side effects of conventional chemotherapy medications. Nonetheless, immunotherapy exhibits potential in the treatment of bladder cancer.
View Article and Find Full Text PDFRecently, PI3K and HDAC have been considered as promising targets for the cancer therapy. A couple of pan-PI3K/HDAC dual inhibitors have been developed as a new class of anticancer agents. Herein, we discovered a new series of (S)-N-(thiazol-2-yl) pyrrolidine-1,2-dicarboxamide derivatives targeting PI3Kα/HDAC6.
View Article and Find Full Text PDFDeep venous thrombosis (DVT) is the third most common cardiovascular disease. Its clinical therapeutic effect is unsatisfactory due to the high rate of postthrombotic syndrome. Several studies have demonstrated the involvement of miRNAs in DVT.
View Article and Find Full Text PDFHerein, we report a method that uses antifungal tavaborole as a co-catalyst for direct α-C-H alkylation of structurally diverse alcohols through photoredox catalysis. The protocol features mild conditions, remarkable scope, and wide functional group tolerance, which allows for the construction of a wide array of highly functionalized alcohols, including homoserine derivatives and -glycosyl amino acids. We also demonstrate the synthetic applications of this methodology to the late-stage functionalization of pharmaceuticals and natural products.
View Article and Find Full Text PDFExcess levels of chemical hepatotoxicants (alcohol, aflatoxin B1), oxidative drugs (acetaminophen) and some cytokines (ET-1, TGF-β1) can induce chronic or acute liver injury. After these, the severe hepatic disease, especially the liver fibrosis (LF) occurs without taking measures, which brings threat to human health. The dibenzocyclooctadiene lignans of S.
View Article and Find Full Text PDFAn investigation on the extract from the plant Trichilia sinensis Bentv. led to the isolation of 13 new limonoids (1-13), in which two were of khayalactone skeleton and 11 were phragmalin-type limonoids, and eight known phragmalin-type limonoids (14-21). Their structures were elucidated by using spectroscopic techniques and HRESIMS experiment.
View Article and Find Full Text PDFSaffron is a well-known Chinese traditional herb, and crocin biosynthesis is related to the yield and quality of saffron. This study aimed to screen differentially expressed genes (DEGs) in saffron at different flowering stages and identify cytochrome P450 (CYP) genes involved in crocin biosynthesis. Saffron samples at different flowering stages were used for RNA sequencing, and DEGs between the samples at three days before the flowering stage (- 3da) and two days after the flowering stage (+ 2da) were screened.
View Article and Find Full Text PDFAn integrated model of VOCs emission/sorption from/on dry building materials with a general boundary condition, variable air exchange rate and inlet concentration is developed. An analytical solution is obtained by using the generalized integral transform technique. Good agreements are obtained between the present model and the experimental data.
View Article and Find Full Text PDFThe study aimed to investigate the antitumor effects of husks (TAH) extract on SK-BR-3 cells of Her2-positive breast cancer. The bioactive compounds of TAH extracts were analyzed qualitatively and quantitatively by Ultra-Performance Liquid Chromatography/Mass Spectrometry (UPLC-MS)/high-performance liquid chromatographic system (HPLC). The effects of TAH extracts on cell proliferation, cell cycle, and apoptosis of SK-BR-3 cells were determined by CCK-8 and flow cytometry.
View Article and Find Full Text PDFEthnopharmacological Relevance: Chemical hepatotoxicity, especially alcoholic liver injury (ALI), commonly occurs in young and middle-aged people who drink heavily. ALI is extremely harmful and can induce severe disease states, such as hepatitis, liver fibrosis, cirrhosis, or liver cancer, which are similar to CCl-induced liver disease states in animals. In recent studies, the pathological changes of hepatocytes and the hepatic stellate cell have shown a significant connection between endoplasmic reticulum (ER) stress and the development of liver pathology in patients.
View Article and Find Full Text PDFContext: Ma Huang Tang (MHT) has been used to treat influenza, fever, bronchial asthma, etc. as a traditional Chinese medication. However, the anti-inflammation mechanism of MHT remains unclear.
View Article and Find Full Text PDFThree new sesquiterpenes of canusesnol K (1), canusesnol L (2) and 12, 15-dihydroxycurcumene (3), along with five known ones (4-8), were isolated from the heartwood extract of Pterocarpus santalinus. Their structures were established by extensive analyses of 1D and 2D NMR spectroscopy, including H NMR, C NMR, HSQC, HMBC and NOESY, and HRESI-MS. The absolute configurations of the new compounds were established with Modified Mosher's method.
View Article and Find Full Text PDFGlutamate-induced excitotoxicity is a key pathological mechanism in many neurological disease states. Ecdysterones derived from Rhaponticum carthamoides (Willd.) Iljin (RCI) have been shown to alleviate glutamate-induced neuronal damage; although their mechanism of action is unclear, some data suggest that they enhance signaling in the mechanistic target of rapamycin (mTOR) signaling pathway.
View Article and Find Full Text PDFJ Asian Nat Prod Res
August 2016
Two new isoxazoline compounds, 1-oxa-2-azaspiro[4.5]dec-2-ene-8β-ol (1) and 1-oxa-2-azaspiro[4.5]dec-2-ene-8α-ol (2), were isolated from the husks of fruits of Xanthoceras sorbifolia Bunge and their structures were determined by spectroscopic analyses, including X-ray crystallography, HRESI-MS, UV, IR, and 1D and 2D NMR (HSQC, HMBC, NOESY) methods.
View Article and Find Full Text PDFObjectives: Kadsura longipedunculata (KL) has been widely used for the treatment of insomnia in traditional Chinese medicine. The aim of this study was to explore the mechanism of the sedative and hypnotic effects of KL.
Materials And Methods: The content of KL was evaluated by HPLC-TOF-MS, and a potential target was found and used to construct its 3D structure to screen for potential ligands among the compounds in KL by using bioinformatics analysis, including similarity ensemble approach (SEA) docking, homology modeling, molecular docking and ligand-based pharmacophore.
A bioassay-guided study led to the isolation of seven new cassane furanoditerpenes, designated as spirocaesalmin B (1), caesalpinin M1 (2), caesalpinin M2 (3), caesalmin E1 (4), caesalmin E2 (5), caesalmin E3 (6), caesalpinin F1 (7) and three known compounds neocaesalpin A(8), neocaesalpin L(9), neocaesalpin L1(10) from the seeds of Caesalpinia minax Hance. Compound structures were determined on the basis of extensive spectroscopic analyses, including X-ray crystallographic analysis, HRESI-MS, UV, IR, 1D and 2D NMR (HSQC, HMBC, NOESY) methods. Some absolute configurations were confirmed via the circular dichroism (CD) spectra.
View Article and Find Full Text PDFGuang Pu Xue Yu Guang Pu Fen Xi
May 2010
The safe and real-time monitoring of the production process of acetic acid is always a key technical problem. The conventional online chromatographic analysis can't satisfy the requirements of real-time analysis for its inherent disadvantages. A new type of on-line near-infrared analysis system has been developed for real-time analysis of the concentration of each component in acetic acid reaction kettles instantly.
View Article and Find Full Text PDFIn order to better understand the spatial and temporal distribution pattern of metals and sulfur present in Shanghai, moss bags with Haplocladium microphyllum (Hedw.) Broth. were suspended at 14 local monitoring stations from April through June 2006 in Shanghai, the largest city in China.
View Article and Find Full Text PDFXi Bao Yu Fen Zi Mian Yi Xue Za Zhi
May 2007
Aim: To explore the method of synthesizing the A beta(1-15) multiple antigen peptide (MAP) vaccine and to identify its quality and the immunological activity.
Methods: MAP A beta(1-15) was synthesized by indirect conjugation and analyzed by RP-HPLC,SDA-PAGE and amino acid analysis. Then, C57BL/6 mice were immunized with synthesized MAP A beta(1-15).
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
February 2004
Rat's osteoblasts cultured in vitro were stimulated by recombinant bovine basic fibroblast growth factor(rb-bFGF). After 1-2 days, the osteoblast grew long protuberance, the numbers of osteoblasts were greater than the control groups', the vitality of osteoblasts was better than that of control groups. After 1 hour, the expression of c-fos in osteoblast increased when compared with that in the control group.
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