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Database screening as a strategy to identify endogenous candidate metabolites to probe and assess mitochondrial drug toxicity
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Database screening as a strategy to identify endogenous candidate metabolites to probe and assess mitochondrial drug toxicity
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Journal Article
Database screening as a strategy to identify endogenous candidate metabolites to probe and assess mitochondrial drug toxicity
2023
Overview
Adverse drug reactions (ADRs) are considered an inherent risk of medication use, and some ADRs have been associated with off-target drug interactions with mitochondria. Metabolites that reflect mitochondrial function may help identify patients at risk of mitochondrial toxicity. We employed a database strategy to identify candidate mitochondrial metabolites that could be clinically useful to identify individuals at increased risk of mitochondrial-related ADRs. This led to
l
-carnitine being identified as the candidate mitochondrial metabolite.
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-carnitine, its acetylated metabolite, acetylcarnitine and other acylcarnitines are mitochondrial biomarkers used to detect inborn errors of metabolism. We hypothesized that changes in
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-carnitine disposition, induced by a “challenge test” of intravenous
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-carnitine, could identify mitochondrial-related ADRs by provoking variation in
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-carnitine and/or acetylcarnitine blood levels. To test this hypothesis, we induced mitochondrial drug toxicity with clofazimine (CFZ) in a mouse model. Following CFZ treatment, mice received an
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-carnitine “challenge test”. CFZ-induced changes in weight were consistent with previous work and reflect CFZ-induced catabolism.
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-carnitine induced differences in whole blood acetylcarnitine concentrations in a manner that was dependent on CFZ treatment. This supports the usefulness of a database strategy for the discovery of candidate metabolite biomarkers of drug toxicity and substantiates the potential of the
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-carnitine “challenge test” as a “probe” to identify drug-related toxicological manifestations.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
