ArticleAnalytical and bioanalytical chemistry2025
In-depth characterization of acylcarnitines: utilizing nitroxide radical-directed dissociation in tandem mass spectrometry.
Article in Analytical and bioanalytical chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Acylcarnitines (ACs) are metabolic intermediates of fatty acids playing important roles in regulating cellular energy and lipid metabolism. The large structural diversity of ACs arises from variations in acyl chain length and the presence of chemical modifications, such as methyl branching, desaturation, hydroxylation, and carboxylation. Numerous studies have demonstrated that these structural isomers of ACs function as biomarkers for a variety of diseases. However, conventional tandem mass spectrometry (MS/MS) via low-energy collision-induced dissociation (CID) faces challenges in distinguishing these isomers. In this study, we report a radical-directed dissociation (RDD) approach for characterization of the intrachain modifications within ACs. The method involves derivatizing ACs with O-benzylhydroxylamine (O-BHA), followed by MS
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