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- Creator:
- Diaz-Espinosa, Jennifer, Stringer, Kathleen, and Rosania, Gus
- Description:
- These data were produced from a study that assessed mitochondrial metabolic function by measuring two metabolites, l-carnitine and acetylcarnitine, to determine their effectiveness as candidate clinical biomarkers for age-related, drug-induced alterations in mitochondrial metabolism. To study age and medication-related changes in mitochondrial metabolism, we administered the FDA-approved mitochondriotropic drug, clofazimine (CFZ), or vehicle for to young and old mice. These findings are described in our manuscript: Clofazimine-Mediated, Age-Related Changes in Skeletal Muscle Mitochondrial Metabolites. Data reported was supported by funding from the National Institute of General Medical Sciences (NIGMS) at the National Institutes of Health (NIH) under award numbers R01GM127787 (GRR), R35GM136312 (KAS), P30AR069620 (K Jepsen), and T32GM140223 (L Isom).
- Keyword:
- adverse drug reactions, mitochondrial metabolism, l-carnitine, acetylcarnitine, and cardiac muscle
- Citation to related publication:
- Diaz-Espinosa J, Stringer KA, Rosania GR. Clofazimine-Mediated, Age-Related Changes in Skeletal Muscle Mitochondrial Metabolites. Metabolites. 2023 May 19;13(5):671. doi: 10.3390/metabo13050671. PMID: 37233713; PMCID: PMC10220805.
- Discipline:
- Health Sciences
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- Creator:
- Stringer, Kathleen
- Description:
- Organ-specific metabolic pathways, including those related to mitochondrial metabolism, could provide insight to mechanisms underlying sepsis-induced organ dysfunction. However, it remains unclear if metabolic changes precede or if they result from organ dysfunction. We determined if blood levels of the mitochondrial metabolites acetylcarnitine and L-carnitine correlate with organ-specific signals of sepsis-induced dysfunction. To achieve this goal, we performed a series of translational analyses of two cohorts of human sepsis and experiments using a murine model of polymicrobial sepsis. We evaluated the association between mitochondrial metabolites and clinical indices of organ function. We found that in the blood of patients with sepsis or septic shock, metabolic indices of dysfunctional mitochondrial beta-oxidation that were correlated with clinical measures of renal and liver dysfunction. The relevance of these findings was corroborated in an experimental model that showed distinct patterns of change in organ metabolism that correlated with the blood acetylcarnitine to L-carnitine ratio. In addition, sepsis-induced changes in organ metabolism were distinct in the liver and kidney highlighting the unique energy economies of each organ. Importantly, these metabolic changes preceded histological evidence of cellular apoptosis. In conclusion, sepsis-induced disruption in blood levels of specific metabolites could serve as more reliable indicators of early organ dysfunction than those we presently use. These early metabolite signals provide mechanistic insights to altered metabolism that may hold the key to timely identification of impending organ dysfunction. This could lead to strategies directed at the prevention of sepsis-induced organ failure.
- Keyword:
- sepsis, organ dysfunction, and biomarker discovery
- Citation to related publication:
- pending
- Discipline:
- Science