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Viability Assays for Cells in Culture
Published on: January 20, 2014
NK sensitivity of neuroblastoma cells determined by a highly sensitive coupled luminescent method
Henry Ogbomo1, Anke Hahn, Janina Geiler
1Institut für Medizinische Virologie, Zentrum der Hygiene, Klinikum der J.W. Goethe-Universität Paul Ehrlich Str. 40 60596 Frankfurt am Main, Germany.
Abstract:
The measurement of natural killer (NK) cells toxicity against tumor or virus-infected cells especially in cases with small blood samples requires highly sensitive methods. Here, a coupled luminescent method (CLM) based on glyceraldehyde-3-phosphate dehydrogenase release from injured target cells was used to evaluate the cytotoxicity of interleukin-2 activated NK cells against neuroblastoma cell lines. In contrast to most other methods, CLM does not require the pretreatment of target cells with labeling substances which could be toxic or radioactive. The effective killing of tumor cells was achieved by low effector/target ratios ranging from 0.5:1 to 4:1. CLM provides highly sensitive, safe, and fast procedure for measurement of NK cell activity with small blood samples such as those obtained from pediatric patients.
Insights
A new coupled luminescent method (CLM) accurately measures natural killer (NK) cell toxicity, even with small samples. This safe and fast assay is ideal for evaluating NK cell activity in pediatric patients.
Area of Science:
- Immunology
- Cellular Biology
- Biochemistry
Background:
- Assessing natural killer (NK) cell cytotoxicity is crucial for understanding immune responses against tumors and viral infections.
- Existing methods for measuring NK cell activity often require large blood samples or involve toxic/radioactive labeling substances, limiting their use, especially in pediatric oncology.
- There is a need for sensitive, safe, and rapid assays to evaluate NK cell function, particularly when dealing with limited sample volumes.
Purpose of the Study:
- To introduce and validate a novel coupled luminescent method (CLM) for quantifying NK cell-mediated cytotoxicity.
- To assess the efficacy of interleukin-2 activated NK cells against neuroblastoma cell lines using the CLM.
- To demonstrate the CLM's suitability for analyzing NK cell activity from small blood samples.
Main Methods:
- A coupled luminescent method (CLM) was employed, measuring glyceraldehyde-3-phosphate dehydrogenase release from injured target cells.
- The method was used to evaluate the cytotoxicity of interleukin-2 activated NK cells against neuroblastoma cell lines.
- No pre-treatment of target cells with labeling substances was required, avoiding potential toxicity or radioactivity.
Main Results:
- The CLM demonstrated high sensitivity in measuring NK cell toxicity, even with small effector/target ratios (0.5:1 to 4:1).
- Effective killing of neuroblastoma tumor cells was observed.
- The assay proved to be safe and fast, requiring minimal sample preparation.
Conclusions:
- The coupled luminescent method (CLM) offers a highly sensitive, safe, and rapid approach for measuring NK cell activity.
- This method is particularly advantageous for analyzing NK cell function in scenarios with limited sample availability, such as pediatric patient samples.
- CLM provides a valuable tool for research and clinical applications involving NK cell-mediated immune responses.
