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A Targeted Metabolomics-Based Assay Using Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes Identifies

Jessica A Palmer1, Alan M Smith1, Vitalina Gryshkova2

  • 1Stemina Biomarker Discovery, Inc, Madison, Wisconsin.

Toxicological Sciences : an Official Journal of the Society of Toxicology
|February 11, 2020
PubMed
Summary
This summary is machine-generated.

A new assay using human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM) identifies cardiotoxic drugs early. It analyzes four key metabolites to predict drug-induced heart damage, improving drug safety and development efficiency.

Keywords:
in vitrocardiotoxicitydrug discovery and developmenthiPSC-CMmetabolites

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Area of Science:

  • Biomedical science
  • Drug discovery
  • Cardiovascular toxicology

Background:

  • Early identification of cardiotoxicity is crucial for drug safety and development.
  • Current methods can be time-consuming and costly.
  • Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CM) offer a promising model for toxicity screening.

Purpose of the Study:

  • To develop and validate a metabolic biomarker-based assay for predicting drug-induced cardiotoxicity.
  • To identify specific metabolites indicative of cardiotoxicity in hiPSC-CM.
  • To establish an efficient screening tool for early-stage drug development.

Main Methods:

  • Metabolomic analysis of hiPSC-CM spent media after drug exposure (66 drugs).
  • Identification of four key cardiotoxicity biomarker metabolites: arachidonic acid, lactic acid, 2'-deoxycytidine, and thymidine.
  • Development of a targeted assay measuring metabolites and hiPSC-CM viability across concentration gradients.

Main Results:

  • The assay predicted cardiotoxicity potential in 81 drugs with high accuracy (86% balanced accuracy, 83% sensitivity, 90% specificity) when optimized for balanced accuracy.
  • Optimizing for sensitivity achieved 90% sensitivity and 79% specificity.
  • Four identified metabolites serve as reliable indicators of both functional and structural cardiotoxicity.

Conclusions:

  • A novel hiPSC-CM-based metabolic biomarker assay effectively predicts cardiotoxicity.
  • This assay provides a valuable tool for early-stage drug safety evaluation.
  • The assay can be integrated with other endpoints for comprehensive cardiotoxicity assessment.