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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Autonomously Bioluminescent Mammalian Cells for Continuous and Real-time Monitoring of Cytotoxicity
04:47

Autonomously Bioluminescent Mammalian Cells for Continuous and Real-time Monitoring of Cytotoxicity

Published on: October 28, 2013

A cell-based sensor system for toxicity testing using multiwavelength fluorescence spectroscopy.

Michael Fritzsche1, J Magnus Fredriksson, Maria Carlsson

  • 1Division of Biotechnology/IFM, Linköping University, 581 83 Linköping, Sweden.

Analytical Biochemistry
|May 21, 2009
PubMed
Summary
This summary is machine-generated.

A new cell-based sensor using HL-1 cardiomyocytes offers sensitive in vitro toxicity testing. This novel system shows promise for accurate drug toxicity assessment in pharmacological research.

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Toxicology

Background:

  • Developing sensitive in vitro toxicity testing methods is crucial for drug development.
  • Cardiomyocytes offer a relevant biological model for assessing drug-induced toxicity.
  • HL-1 cell line provides a functional and reproducible model for cell-based assays.

Purpose of the Study:

  • To describe a novel cell-based fluorometric sensor system for toxicity monitoring.
  • To evaluate the potential of HL-1 cardiomyocytes as a biological recognition element for in vitro toxicity testing.
  • To assess the system's performance in detecting general cytotoxicity using known drugs.

Main Methods:

  • Utilized spontaneously contracting HL-1 cardiomyocytes cultured in 96-well plates.
  • Integrated the cell culture plate with a fluorescence spectrometer via optical fiber for excitation-emission matrix scanning.
  • Analyzed fluorescence data using spectral analysis software.
  • Determined EC50 values for verapamil, quinidine, and acetaminophen.

Main Results:

  • The cell-based sensor system successfully detected general cytotoxicity.
  • Dose-response curves were established, yielding EC50 values for the tested drugs.
  • EC50 values obtained were: verapamil (0.10±0.007 mM), quinidine (0.23±0.025 mM), and acetaminophen (12.32±2.40 mM).
  • Results showed good correlation with existing in vitro and in vivo reference data.

Conclusions:

  • The developed cell-based fluorometric sensor system is a sensitive and relevant tool for in vitro toxicity testing.
  • HL-1 cardiomyocytes serve as an effective biological recognition element for this sensor system.
  • The system demonstrates potential utility in pharmacological drug testing and toxicity assessment.