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Quantitative Determination of a Series of Oxysterols by an Optimized LC-MS/MS Analysis in Different Tissue Types.
Int J Mol Sci
December 2024
School of Public Health, Capital Medical University, Beijing 100069, China.
Oxysterols, as metabolites of cholesterol, play a key role in cholesterol homeostasis, autophagosome formation, and regulation of immune responses. Disorders in oxysterol metabolism are closely related to the pathogenesis of neurodegenerative diseases. To systematically investigate the profound molecular regulatory mechanisms of neurodegenerative diseases, it is necessary to quantify oxysterols and their metabolites in central and peripheral biospecimens simultaneously and accurately.
View Article and Find Full Text PDFPostmortem distribution of mitragynine and 7-hydroxymitragynine in 51 cases.
J Anal Toxicol
December 2024
Tarrant County Medical Examiner's Office, Fort Worth, TX 76104, United States.
The prevalence of mitragynine (kratom) in forensic toxicology casework has steadily increased over time. Readily available and currently legal, mitragynine is widely used for its stimulant and, depending on concentration, sedative effects. Our laboratory analyzed various fluid and tissue specimens from 51 postmortem cases to investigate the distribution of mitragynine and its active metabolite 7-hydroxymitragynine.
View Article and Find Full Text PDFWater-soluble platinum and palladium porphyrins with peripheral ethyl phosphonic acid substituents: synthesis, aggregation in solution, and photocatalytic properties.
Dalton Trans
January 2025
Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS, Université de Bourgogne, 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France.
Water-soluble porphyrins have garnered significant attention due to their broad range of applications in biomedicine, catalysis, and material chemistry. In this work, water-soluble platinum(II) and palladium(II) complexes with porphyrins bearing ethyl phosphonate substituents, namely, Pt/Pd 10-(ethoxyhydroxyphosphoryl)-5,15-di(-carboxyphenyl)porphyrins (M3m, M = Pt(II), Pd(II)) and Pt/Pd 5,10-bis(ethoxyhydroxyphosphoryl)-10,20-diarylporphyrins (M1d-M3d; aryl = -tolyl (1), mesityl (2), -carboxyphenyl (3)), were synthesized by alkaline hydrolysis of the corresponding diethyl phosphonates M6m and M4d-M6d. NMR, UV-vis, and fluorescence spectroscopy revealed that the mono-phosphonates M3m tend to form aggregates in aqueous media, while the bis-phosphonates M3d exist predominantly as monomeric species across a wide range of concentrations (10-10 M), ionic strengths (0-0.
View Article and Find Full Text PDFAqueous and ethanolic extracts of Moringa oleifera leaves induce selective cytotoxicity in Raji and Jurkat cell lines by activating the P21 pathway independent of P53.
Mol Biol Rep
January 2025
Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Article Synopsis
- Moringa oleifera has been traditionally used in Africa and Asia for its medicinal properties and this study explores its potential anti-leukemia effects through its leaf extracts.
- The research involved treating leukemia cells with different concentrations of aqueous and ethanolic extracts and measuring cell viability, apoptosis, and gene expression.
- Results indicated that these extracts were more effective on leukemia cells compared to healthy cells, highlighting the potential for Moringa extracts to be developed as a novel treatment for leukemia.
Updates on Intrinsic Medicinal Chemistry of 1,4-dihydropyridines, Perspectives on Synthesis and Pharmacokinetics of Novel 1,4-dihydropyrimidines as Calcium Channel Blockers: Clinical Pharmacology.
Curr Top Med Chem
January 2025
Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India.
Background: Several chemical studies described the physiological efficacy of 1,4- dihydropyridines (DHPs). DHPs bind to specific sites on the α1 subunit of L-type calcium channels, where they demonstrate a more pronounced inhibition of Ca2+ influx in vascular smooth muscle compared to myocardial tissue. This selective inhibition is the basis for their preferential vasodilatory action on peripheral and coronary arteries, a characteristic that underlies their therapeutic utility in managing hypertension and angina.
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