Di-docosahexaenoyl (C22:6)-bis(monoacylglycerol) phosphate (BMP) has been identified as a promising biomarker for drug-induced phospholipidosis (DIPL). Both unlabelled and stable isotope labelled versions of BMP were desired for use as internal standards. Isopropylideneglycerol was converted to 4-methoxyphenyldiphenylmethyl-3-PMB-glycerol in three steps. Initially, the 2-postion of the glycerol was protected as a t-butyldiphenylsilyl ether, which proved to be a mistake; deprotection of the ether resulted in the decomposition of the compound. A switch to a t-butyldimethylsilyl ether protecting group resulted in an intermediate that could be deprotected to the alcohol to give the target compound after salt exchange. The same procedure was used to prepare [ C ]BMP from [ C ]glycerol.
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http://dx.doi.org/10.1002/jlcr.3714 | DOI Listing |
Am J Vet Res
January 2025
Department of Comparative Pathobiology, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA.
Objective: In dogs with diet-associated dilated cardiomyopathy (DCM), we have identified electron microscopic changes suggestive of abnormal lysosomal accumulation of phospholipids and consistent with the appearance of drug-induced phospholipidosis in people and other animals. The objective of this study was to compare concentrations of urine di-docosahexaenoyl (22:6)-bis(monoacylglycerol)phosphate (BMP), a biomarker of drug-induced phospholipidosis, in dogs with DCM eating high-pulse (HP) diets, dogs with DCM eating low-pulse (LP) diets, and healthy controls (control-HP and control-LP).
Methods: In this cross-sectional study, voided urine was collected from client-owned dogs with DCM from September 2018 through March 2020.
Anal Bioanal Chem
December 2019
National Physical Laboratory, Teddington, London, TW11 0LW, UK.
Within drug development and pre-clinical trials, a common, significant and poorly understood event is the development of drug-induced lipidosis in tissues and cells. In this manuscript, we describe a mass spectrometry imaging strategy, involving repeated analysis of tissue sections by DESI MS, in positive and negative polarities, using MS and MS/MS modes. We present results of the detected distributions of the administered drug, drug metabolites, lipid molecules and a putative marker of lipidosis, di-docosahexaenoyl (22:6)-bis(monoacylglycerol) phosphate (di-22:6-BMP).
View Article and Find Full Text PDFJ Labelled Comp Radiopharm
September 2019
Early Chemical Development, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden.
J Pathol
December 2018
Pathology Department, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
Obesity and dyslipidaemia are features of the metabolic syndrome and risk factors for chronic kidney disease. The cellular mechanisms connecting metabolic syndrome with chronic kidney disease onset and progression remain largely unclear. We show that proximal tubular epithelium is a target site for lipid deposition upon overnutrition with a cholesterol-rich Western-type diet.
View Article and Find Full Text PDFSci Transl Med
February 2015
Department of Neuroscience, Genentech Inc., South San Francisco, CA 94080, USA.
Inhibition of the kinase activity of leucine-rich repeat kinase 2 (LRRK2) is under investigation as a possible treatment for Parkinson's disease. However, there is no clinical validation as yet, and the safety implications of targeting LRRK2 kinase activity are not well understood. We evaluated the potential safety risks by comparing human and mouse LRRK2 mRNA tissue expression, by analyzing a Lrrk2 knockout mouse model, and by testing selective brain-penetrating LRRK2 kinase inhibitors in multiple species.
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