A 17 years old male patient with Pyrimethamin therapy was released from our department by emphasising the necessity of continuous control. A month later the patient was accepted again with serious anaemia. Since the patient did not follow the instructions Pyrimethamin intoxication was presumed, but it had to be proved. At last the drug in the plasma was identified and quantified by mass spectrometry. The plasma concentration of Pyrimethamin was five times higher than the therapeutic level. The rapid analysis (4 hours after taking of blood) and adequate treatment resulted in rapid improvement with the concomitant decrease of plasma Pyrimethamin concentration. During clinical treatment the level of Pyrimethamin in the plasma was followed by mass spectrometry.
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J Agric Food Chem
January 2025
Yibin Academy of Southwest University, Yibin 644000, China.
Consumer concerns regarding food nutrition and quality are becoming increasingly prevalent. High-resolution mass spectrometry (HRMS)-based metabolomics stands as a cutting-edge and widely embraced technique in the realm of food component analysis and detection. It boasts the capability to identify character metabolites at exceedingly low abundances, which remain undetectable by conventional platforms.
View Article and Find Full Text PDFJ Neurochem
January 2025
Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, Canada.
Highly abundant in neurons, the cellular prion protein (PrP) is an obligatory precursor to the disease-associated misfolded isoform denoted PrP that accumulates in the rare neurodegenerative disorders referred to either as transmissible spongiform encephalopathies (TSEs) or as prion diseases. The ability of PrP to serve as a substrate for this template-mediated conversion process depends on several criteria but importantly includes the presence or absence of certain endoproteolytic events performed at the cell surface or in acidic endolysosomal compartments. The major endoproteolytic events affecting PrP are referred to as α- and β-cleavages, and in this review we outline the sites within PrP at which the cleavages occur, the mechanisms potentially responsible and their relevance to pathology.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Biology, Middlebury College, Middlebury, Vermont, United States of America.
Molybdenum blue colorimetry (MBC) is the dominant, well-established method used for determining total P in environmental media, including in organismal tissues. However, other elemental methods for P determination are available, including inductively coupled plasma mass spectrometry (ICP-MS). Given the extensive literature using MBC to determine P in organismal samples, it is important to assess P analyses by ICP-MS and MBC to ensure that the two methods produce comparable data.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
Hydrogen production via water-splitting or ammonia electrolysis using transition metal-based electrodes is one of the most cost-effective approaches. Herein, ca. 1-4% of Pt atoms are stuffed into a wolframite-type NiWO lattice to improve the electrocatalytic efficiency.
View Article and Find Full Text PDFAnn Rheum Dis
January 2025
Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan. Electronic address:
Objectives: The usefulness of methotrexate-polyglutamates (MTX-PGs) concentration for management of rheumatoid arthritis has been debated. We aimed to clarify the association of MTX-PGs concentration with efficacy and safety in MTX-naïve patients initiating MTX in a prospective interventional clinical trial.
Methods: The MIRACLE trial enrolled 300 MTX-naïve patients.
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