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Quantitative IC50 Analysis of Puromycin-Induced Cytotoxicity in NIH/3T3 Cells Using a Multi-Well Array Impedance

Seok-Kyu Kim1, SuGwon Nam1, Moongyu Jang1,2,3

  • 1School of Nano Convergence Technology, Hallym University, Chuncheon 24252, Republic of Korea.

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|September 26, 2025
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Summary
This summary is machine-generated.

This study used an impedance biosensor to measure drug toxicity, determining the half-maximal inhibitory concentration (IC50) of puromycin in NIH/3T3 fibroblasts. The biosensor offers a rapid method for drug screening and biocompatibility assessment.

Keywords:
ECISIC50NIH 3T3 cellcapacitancepuromycinsemiconductor

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Area of Science:

  • Biomedical Engineering
  • Pharmacology
  • Cell Biology

Background:

  • Electrical cell-substrate impedance sensing (ECIS) biosensors are used in various fields, but interpreting impedance signals for biological significance is underexplored.
  • Most ECIS studies focus on monitoring cellular behavior via impedance changes, with less emphasis on quantitative biological interpretation.

Purpose of the Study:

  • To employ a multi-well array impedance biosensor for half-maximal inhibitory concentration (IC50) analysis.
  • To evaluate the drug toxicity and efficacy of puromycin using impedance biosensing.
  • To determine the IC50 value of puromycin for NIH/3T3 fibroblasts.

Main Methods:

  • Utilized a multi-well array impedance biosensor for real-time monitoring.
  • Exposed NIH/3T3 fibroblasts to varying concentrations of puromycin.
  • Performed capacitance-based impedance analysis to assess cell viability and determine IC50 values.

Main Results:

  • The IC50 value of puromycin for NIH/3T3 cells was determined to be 3.96 µM.
  • Demonstrated the capability of the impedance biosensor for quantitative drug toxicity evaluation.
  • Confirmed puromycin's inhibitory effect on protein synthesis in fibroblasts.

Conclusions:

  • The multi-well array impedance biosensor provides a rapid and quantitative method for drug toxicity evaluation.
  • This impedance biosensor platform is valuable for drug screening and biocompatibility assessment.
  • Capacitance-based impedance analysis effectively determines drug efficacy metrics like IC50.