Characterizing doxorubicin-induced apoptosis in HepG2 cells using an integrated microfluidic device

Area of Science:

• Cell Biology
• Biotechnology
• Cancer Research

Background:

• Apoptosis is crucial in biology and disease development.
• Understanding drug-induced apoptosis is vital for cancer therapy.
• HepG2 cells are a model for human hepatocellular carcinoma.

Purpose of the Study:

• To develop an integrated microfluidic device for characterizing doxorubicin-induced apoptosis.
• To enable high-throughput analysis of cellular responses to apoptotic stimuli.
• To provide a platform for studying drug effects on cancer cells.

Main Methods:

• Fabrication of an integrated microfluidic device for cell culture and stimulation.
• Generation of a continuous doxorubicin concentration gradient.
• Use of fluorescent dyes for apoptosis detection (morphological changes, phosphatidylserine externalization, mitochondrial potential collapse).
• Single-cell resolution monitoring and quantification of cellular fluorescence.

Main Results:

• The microfluidic device successfully characterized doxorubicin-induced apoptosis in HepG2 cells.
• Multiple apoptotic events were measured with single-cell resolution.
• The device integrated cell culture, stimulation, staining, and washing steps efficiently.

Conclusions:

• The developed microfluidic device offers a powerful platform for high-throughput apoptosis studies.
• This technology facilitates detailed characterization of cellular responses to drug-induced apoptosis.
• It overcomes limitations of conventional methods for studying apoptosis in cancer cells.