A simple, low-cost staining method for rapid-throughput analysis of tumor spheroids

Area of Science:

• Biomedical Sciences
• Cancer Research
• Drug Discovery

Background:

• Tumor spheroids are crucial for studying cancer stem cells (CSCs) in tumors.
• There is a need for cost-effective, high-throughput drug screening methods for tumor spheroids.
• Current methods may not be optimal for assessing CSC function in 3-D cultures.

Purpose of the Study:

• To develop a simple, low-cost, and high-throughput assay for analyzing live tumor spheroids.
• To enable rapid drug screening for anti-proliferative effects on cancer stem cells in 3-D cultures.
• To utilize neurospheres as a model for non-adherent 3-D cultures.

Main Methods:

• Developed an acridine orange (AO)-based fluorescence microscopy assay.
• Utilized neurospheres in a 96-well format for non-adherent 3-D culture.
• Measured spheroid cross-section area as an indicator of cell viability.

Main Results:

• The AO-based assay provides rapid analysis of live neurospheres.
• The method is suitable for high-throughput screening in a 96-well format.
• The assay effectively assesses the impact of anti-proliferative drugs on CSC growth in 3-D.

Conclusions:

• A novel, low-cost acridine orange assay enables efficient drug screening of tumor spheroids.
• This method facilitates the assessment of drug efficacy against cancer stem cells in 3-D.
• The developed assay supports advancements in cancer stem cell research and drug development.