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2-MCPD-Induced Effects in the Heart: Toxicological and Mechanistic Implications from Comparative Proteomic Analyses
Axel Oberemm1, Andreas Eisenreich1, Katharina Sommerkorn1
1German Federal Institute for Risk Assessment, Department of Food and Feed Safety in the Food Chain, Max-Dohrn-Straße 8-10, 10589 Berlin, Germany.
Molecules (Basel, Switzerland)
|February 27, 2026
Summary
2-monochloropropane-1,3-diol (2-MCPD) may cause heart failure in rats by disrupting mitochondrial energy production. This occurs through reactive metabolites impacting pyruvate utilization, leading to cardiomyocyte degeneration.
Area of Science:
- Toxicology
- Proteomics
- Cardiovascular Science
Background:
- The toxicity of 2-monochloropropane-1,3-diol (2-MCPD) is less understood than 3-MCPD.
- Previous studies investigated 2-MCPD's cardiac effects at the proteomic level over 28 and 90 days.
Purpose of the Study:
- To re-evaluate in vivo proteomic data on 2-MCPD cardiac toxicity.
- To investigate 2-MCPD metabolism, focusing on mitochondrial energy and heart function.
- To generate hypotheses for future 2-MCPD toxicological research.
Main Methods:
- Comparative analysis of existing subacute and subchronic oral toxicity rat study proteomic data.
- Focus on mitochondrial energy metabolism and cardiac structural integrity.
- In vivo toxicological data re-evaluation.
Main Results:
- Identified deregulation of cytoskeletal proteins, suggesting cardiomyocyte degeneration.
- Observed deregulation of enzymes involved in carbohydrate utilization and mitochondrial function.
- Strong indications of impaired mitochondrial pyruvate utilization and energy production.
Conclusions:
- Hypothesize that reactive 2-MCPD metabolites impair mitochondrial pyruvate utilization and energy production.
- Suggest potential for cardiac functional heart failure in rats at doses >10 mg/kg bw/day.
- Postulate formation of aldehydic and acidic metabolites as causative agents of 2-MCPD cardiotoxicity.
