A Microfluidic Chip for Detecting Cholangiocarcinoma Cells in Human Bile

Area of Science:

• Oncology
• Biotechnology
• Medical Diagnostics

Background:

• Cholangiocarcinoma (CCA) is a significant cause of liver cancer, often diagnosed late due to limitations in current detection methods.
• Existing diagnostic techniques for CCA are expensive, labor-intensive, and have low sensitivity, particularly in early stages.

Purpose of the Study:

• To develop and validate a novel microfluidic system for the sensitive detection of bile duct cancer cells in human bile.
• To provide a more efficient and accurate diagnostic tool for cholangiocarcinoma.

Main Methods:

• Partially purified human bile was processed through a microfluidic chip.
• The system incorporated cell capture, immunofluorescence (IF) staining with CCA-specific biomarkers, and optical detection modules.
• The system was tested on cell cultures, spiked blood samples, and clinical bile specimens.

Main Results:

• Successful capture and identification of CCA cells from various sample types were demonstrated.
• The system detected >2, 0, and 1 positive cells in 7.5 ml of bile from advanced stage, healthy, and chemotherapy-treated patients, respectively.
• Proof-of-concept validation confirmed the system's ability to identify cancer cells.

Conclusions:

• The developed microfluidic system shows promise as a tool for detecting cancer cells in bile.
• This technology has the potential for early-stage CCA detection, even when cancer cells are present at low densities.
• The system offers a sensitive and potentially cost-effective alternative for cholangiocarcinoma diagnosis.