Image analysis using the fluorochromasia assay to quantify tumor drug sensitivity
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Updated: Aug 18, 2026
Comprehensive Analysis of Drug Response using the FLICK Assay
Published on: June 6, 2025
John F Gibbs1, Youcef M Rustum, Harry K Slocum
1Department of Surgical Oncology, Roswell Park Cancer Institute, Buffalo, NY, USA.
Abstract:
A method of assessing chemosensitivity of tissue utilizing tissue fluorescence and image analysis was implemented to provide a rapid and quantitative means of assessing the effect of drugs on tissue metabolic activity and proliferative capacity. The fluorescent microscopic image captured by a silicon-intensified target (low-light-detecting) camera and linked to an image- processing unit was measured for fluorescent brightness and tumor image area. An established rodent model served to characterize the system's ability to measure serially the tumor's metabolic activity and growth. Further studies on fresh human tumors were conducted with a novel topoisomerase II inhibitor, NC-190. Tumor image area and fluorescent brightness were measured 24 h pretreatment, 48 h posttreatment, and 48 h post-drug removal. Fifty-five percent (28/51) of fresh human tumors showed sensitivity to 48-h exposure to 10, 30, or 100 microM NC-190. The potential benefit of this technique is the ability to predict the response of tumors to chemotherapeutic agents as a laboratory tool for preclinical drug evaluation and clinically prior to the commencement of therapy.
Insights
This study introduces a novel fluorescence imaging technique to rapidly assess drug effects on tumor cells. This method accurately measures tissue chemosensitivity, aiding in predicting patient response to cancer therapies.
Area of Science:
- Biomedical imaging
- Cancer research
- Drug discovery
Background:
- Assessing chemosensitivity is crucial for effective cancer therapy.
- Current methods can be slow and lack quantitative precision.
Purpose of the Study:
- To develop and validate a rapid, quantitative method for assessing tissue chemosensitivity.
- To evaluate the efficacy of a novel topoisomerase II inhibitor (NC-190) in human tumors.
Main Methods:
- Utilized fluorescence microscopy and image analysis to measure tissue fluorescence and tumor area.
- Employed a rodent model for serial measurements of tumor metabolic activity and growth.
- Applied the technique to fresh human tumors treated with NC-190.
Main Results:
- The system quantitatively measured changes in tumor metabolic activity and proliferative capacity.
- Fifty-five percent of human tumors demonstrated sensitivity to NC-190 after 48-hour exposure.
- The technique showed potential for serial assessment of tumor response.
Conclusions:
- Fluorescence imaging provides a rapid and quantitative assessment of tissue chemosensitivity.
- This method can serve as a valuable tool for preclinical drug evaluation and clinical therapy prediction.
