Spheroids as a 3D Model of the Hypoxic Tumor Microenvironment

Area of Science:

• Oncology
• Biotechnology
• Cell Biology

Background:

• Three-dimensional (3D) spheroids represent a more physiologically relevant model for studying tumor microenvironments and tumor hypoxia compared to traditional 2D cell cultures.
• Spheroid formation can be achieved through various methods, either in suspension or by adhering to a scaffold, with the choice depending on the specific cell type.

Purpose of the Study:

• To provide a comprehensive overview of common spheroid formation techniques.
• To highlight the utility of spheroids in drug treatment trials and subsequent analyses.
• To detail how microscopy can be employed to assess spheroid invasiveness and monitor cellular zoning.

Main Methods:

• Hanging drop method
• Low adhesion plates
• Hydrogel encapsulation
• Micropatterned plates
• Microfluidic devices

Main Results:

• Spheroids provide a superior model for investigating tumor biology and hypoxia.
• Established methods allow for reproducible spheroid generation tailored to cell type.
• Post-formation analysis includes drug screening, Western Blot, qPCR, and advanced microscopy.

Conclusions:

• Spheroid technology offers a powerful platform for preclinical cancer research.
• Diverse formation methods cater to various research needs.
• Advanced imaging techniques enable detailed analysis of spheroid characteristics, including invasiveness and cellular stratification.