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Sequential 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 PDFNutraceutical Impact of Pumpkin Seed Oil on Expression Levels of EZH-2 and KRT-14 Genes against DSS-induced Inflammatory Bowel Disease in the Rat Model.
Cell Biochem Biophys
January 2025
Department of Food Science, Faculty of Agriculture, Zagazig University, Zagazig, 44519, Egypt.
Inflammatory bowel disease is a collection of intestinal disorders that cause inflammation in the digestive tract. Prolonged inflammation in the gastrointestinal tract is a major risk factor for colorectal cancer. The objective of this study was to fucus on gene expression levels of (KRT-14; associated with epithelial cell integrity) and enhancer of zeste homolog-1 (EZH-2; involved in cellular proliferation) in a IBD rat model in order to rule out impact of nutraceuticals (pumpkin seed oil; PSO) as a complementary approach to conventional treatments of IBD.
View Article and Find Full Text PDFDevelopment of a novel HPLC-HRMS method for quantitative analysis of resorcinol in urine: Application to hairdressers' occupational exposure.
J Chromatogr B Analyt Technol Biomed Life Sci
January 2025
Resorcinol is a widespread substance used in a large variety of manufacturing industries, including cosmetics, with endocrine-disrupting activity on the thyroid function. The aim of the present study was to develop and validate a sensitive, selective and robust method to quantify resorcinol in urine and thereby assess hairdressers' occupational exposure. As resorcinol is mainly excreted in urine as glucuronide or sulfate forms, the first step consisted in hydrolyzing urine samples with a β-glucuronidase-arylsulfatase enzyme for 16 h.
View Article and Find Full Text PDFReconcentrating the Ionic Liquid EMIM-HSO Using Direct Contact Membrane Distillation.
Molecules
January 2025
Department of Chemical Engineering, Louisiana Tech University, 600 Dan Reneau Drive, P.O. Box 10348, Ruston, LA 71272, USA.
Adequate water supplies are crucial for missions to the Moon, since water is essential for astronauts' health. Ionic liquids (ILs) have been investigated for processing metal oxides, the main components of lunar regolith, to separate oxygen and metals. The IL must be diluted in the process.
View Article and Find Full Text PDF[A novel carbonyl reductase for the synthesis of ()-tolvaptan].
Sheng Wu Gong Cheng Xue Bao
January 2025
Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, College of Chemistry and Materials Sciences, Hebei University, Baoding 071002, Hebei, China.
Screening carbonyl reductases with the ability to catalyze the reduction of complex carbonyl compounds is of great significance for the biosynthesis of -tolvaptan(-TVP). In this study, the target carbonyl reductase in the crude enzyme extract of rabbit liver was separated, purified, and identified by ammonium sulfate precipitation, gel-filtration chromatography, ion exchange chromatography, affinity chromatography, and protein mass spectrometry. With the rabbit liver genome as the template, the gene encoding the carbonyl reductase was amplified by PCR and the recombinant strain was successfully constructed.
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