All-human microphysical model of metastasis therapy

Area of Science:

• Biomedical Engineering
• Cancer Research
• In Vitro Modeling

Background:

• Metastasis is the primary cause of cancer mortality, yet effective treatments are limited by a lack of in vitro models.
• Studying micrometastases and their unique microenvironment is crucial for therapeutic development.

Purpose of the Study:

• To develop a real-time, all-human 3D microscale bioreactor system that accurately mimics the liver metastatic microenvironment.
• To enable in-depth study of metastatic seeding, growth, and drug resistance in a controlled setting.

Main Methods:

• Incorporation of human hepatocytes, nonparenchymal liver cells, and breast cancer cells within a functional tissue construct.
• Instrumentation with oxygen sensors and micropumps for dynamic nutrient/hormone delivery and real-time sampling.
• Recreation of the hepatic niche to investigate paracrine interactions and metabolic challenges.

Main Results:

• The bioreactor successfully models the human liver metastatic microenvironment in 3D.
• It allows for real-time monitoring of cancer cell behavior and response to stimuli.
• The system facilitates investigation of drug metabolism and efficacy within a challenged microenvironment.

Conclusions:

• This novel bioreactor provides a critical tool for understanding metastasis pathophysiology and metastatic tumor resistance.
• It is expected to yield biomarkers for improved clinical monitoring and guide the design of cancer therapeutic studies.
• The adaptable platform has potential applications for studying metastasis in other organs.