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Resazurin-Based Assay to Evaluate Cell Viability After Quantum Dot Interaction.

Maria Isabela A Pereira1, Camila Aparecida P Monteiro1, Weslley Felix de Oliveira1

  • 1Biomedical Nanotechnology Group, Federal University of Pernambuco, Recife, Pernambuco, Brazil.

Methods in Molecular Biology (Clifton, N.J.)
|April 5, 2020
PubMed
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The resazurin assay offers a superior method for assessing quantum dot (QD) toxicity in cells compared to the MTT assay. This non-toxic, reproducible test avoids false positives and keeps cells viable for further experiments.

Area of Science:

  • Nanotechnology
  • Cell Biology
  • Toxicology

Background:

  • Quantum dots (QDs) are increasingly used in life sciences as optical tools.
  • Evaluating QD effects on cell viability is crucial.
  • Colorimetric assays like MTT are common but have limitations.

Purpose of the Study:

  • To introduce and validate the resazurin assay as a better alternative for assessing in vitro cell viability after QD exposure.
  • To highlight the advantages of the resazurin assay over traditional methods like MTT.

Main Methods:

  • The study describes the resazurin assay protocol for evaluating cell viability post-QD exposure.
  • Comparison with the MTT assay is implicitly discussed by highlighting resazurin's advantages.
Keywords:
CytotoxicityNanocrystalsResazurinResorufin

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Main Results:

  • The resazurin assay is presented as a simple, quick, sensitive, reproducible, and non-toxic method.
  • It effectively eliminates false-positive results caused by QD absorbance overlap, unlike the MTT assay.
  • Cells remain viable after the resazurin assay, enabling further analyses.

Conclusions:

  • The resazurin assay is a reliable and advantageous alternative to the MTT assay for evaluating QD cytotoxicity.
  • Its non-interfering nature and preservation of cell viability make it suitable for comprehensive cellular studies.