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Background Thiopurine metabolites, 6-thioguanine (6TG) and 6-methylmercaptopurine (6MMP), are monitored to aid therapeutic management of thiopurine drugs. At Manchester University NHS Foundation Trust (MFT), thiopurine metabolites are measured by high performance liquid chromatography with ultraviolet detection (HPLC-UV). Whole blood samples are lysed and subjected to hydrolysis with derivatisation of 6MMP before HPLC-UV detection at 304nm for the 6MMP-derivative and 342nm for 6TG.
View Article and Find Full Text PDFChlorine-substituted transformation products generated during chlorination of the organophosphorus insecticide disulfoton induce anti-acetylcholine esterase activity.
Chemosphere
January 2025
Faculty of Engineering, Hokkaido University, N13W8, Sapporo, 060-8628, Japan. Electronic address:
Global concern regarding transformation products (TPs) derived from contaminants, including pesticides, in the environment and during water treatment has been growing markedly. In the present study, we investigated the anti-acetylcholinesterase (AChE) activity of an aqueous solution of the organophosphorus insecticide disulfoton, a toxicological endpoint for determining the acceptable daily intake of disulfoton, both in the presence and the absence of metabolism during chlorination. Disulfoton rapidly reacted with free chlorine and completely disappeared within 0.
View Article and Find Full Text PDFSequential separation of anti-diabetic drugs in the presence of melamine as impurity using chromatographic methods.
BMC Chem
January 2025
Pharmaceutical Chemistry Department, Faculty of Pharmacy, Nahda University, Sharq El-Nile, Beni-Suef, 62511, Egypt.
The study of green analytical chemistry has garnered significant attention in the context of mitigating global environmental contamination. In this study, we present two methodologies for environmentally friendly chromatography that enable simultaneous and specific determination of Saxagliptin (SAX), metformin (MET), and a pharmacopoeial impurity of MET known as melamine (MEL). The initial method employed in this study is High-Performance Thin Layer Chromatography (HPTLC), which utilized 60 F 254 silica gel-coated Mark HPTLC plates on aluminum sheets as the stationary phase.
View Article and Find Full Text PDF20-Deoxyingenol ester and ether derivatives: Synthesis, properties and cytotoxicity.
Bioorg Chem
January 2025
Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, China. Electronic address:
The C-3 and C-5 substituted 20-deoxyingenol monoesters are important active components in Euphorbiaceae plants. Nonetheless, their similar physical properties make them difficult to distinguish. The present study developed fast and efficient rules for identifying the esterification sites of 20-deoxyingenol based on a series of chemical syntheses of monoesters and literature research, utilizing NMR spectroscopy, optical rotation analysis, and chromatographic retention behavior.
View Article and Find Full Text PDFDevelopment and validation of a high-performance liquid chromatography method with fluorescence detection for the quantification of the resistance protein P-gp in cancer cells.
J Chromatogr B Analyt Technol Biomed Life Sci
January 2025
Université Clermont Auvergne, Institut Universitaire de Technologie, UMR INSERM-UCA, U1240, Imagerie Moléculaire et Stratégies Théranostiques (IMoST), 5 Avenue Blaise Pascal, 63000 Clermont-Ferrand, France.
A method using high-performance liquid chromatography coupled with fluorescence detection (HPLC-FLD) was developed and validated to quantify the innovative tool LightSpot®-FL-1, a selective permeability-glycoprotein (P-gp)-targeted fluorescent conjugate used to measure P-gp expression in cell samples. Quantifying P-gp is a major challenge in oncology as its overexpression in many cancer cells results in Multidrug Resistance (MDR) associated with chemotherapy failure. To develop the method reported herein, both sample preparation and analysis parameters were investigated.
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