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Modified Annexin V/Propidium Iodide Apoptosis Assay For Accurate Assessment of Cell Death
Published on: April 24, 2011
Rapid on-chip apoptosis assay on human carcinoma cells based on annexin-V/quantum dot probes
Helena Montón1, Mariana Medina-Sánchez2, Joan Antoni Soler2
1Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain; Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Campus UAB-Facultat de Biociències, Bellaterra, 08193 Barcelona, Spain.
Abstract:
Despite all the efforts made over years to study the cancer expression and the metastasis event, there is not a clear understanding of its origins and effective treatment. Therefore, more specialized and rapid techniques are required for studying cell behaviour under different drug-based treatments. Here we present a quantum dot signalling-based cell assay carried out in a segmental microfluidic device that allows studying the effect of anti-cancer drugs in cultured cell lines by monitoring phosphatidylserine translocation that occurs in early apoptosis. The developed platform combines the automatic generation of a drug gradient concentration, allowing exposure of cancer cells to different doses, and the immunolabeling of the apoptotic cells using quantum dot reporters. Thereby a complete cell-based assay for efficient drug screening is performed showing a clear correlation between drug dose and amount of cells undergoing apoptosis.
Insights
This study introduces a microfluidic device using quantum dots to rapidly screen anti-cancer drugs by monitoring apoptosis. The assay effectively correlates drug concentration with cancer cell death, aiding drug discovery.
Area of Science:
- Biotechnology
- Cancer Research
- Cell Biology
Background:
- Cancer metastasis remains poorly understood, necessitating advanced techniques for drug efficacy assessment.
- Current methods for studying anti-cancer drug effects on cell behavior are often slow and lack specificity.
Purpose of the Study:
- To develop a rapid, specialized assay for evaluating anti-cancer drug effectiveness.
- To monitor early apoptosis in cancer cell lines under varying drug concentrations.
Main Methods:
- A microfluidic device was engineered for automated generation of drug concentration gradients.
- Quantum dot (QD) signaling was employed to label and detect phosphatidylserine translocation, a marker of early apoptosis.
- Cancer cell lines were cultured and exposed to different anti-cancer drug doses within the microfluidic system.
Main Results:
- The platform successfully enabled the study of cell behavior under diverse drug treatments.
- A clear correlation was observed between the applied anti-cancer drug dose and the extent of induced apoptosis.
- The assay demonstrated efficiency in drug screening by quantifying apoptotic cells.
Conclusions:
- The developed quantum dot-based microfluidic assay provides an efficient method for anti-cancer drug screening.
- This technique facilitates a better understanding of drug-induced apoptosis in cancer cells.
- The platform supports rapid assessment of drug efficacy, addressing the need for specialized cancer research tools.
