3D tumor models: history, advances and future perspectives

Area of Science:

• Oncology
• Biotechnology
• Drug Discovery

Background:

• Conventional 2D tumor models (monolayer cultures) have limitations in replicating the complex tumor microenvironment.
• Three-dimensional (3D) tumor models offer a more physiologically relevant in vitro system for cancer research.

Purpose of the Study:

• To review existing 3D tumor models, detailing their advantages and limitations.
• To explore advancements in 3D tumor model technology, including microfluidics, imaging, and tissue engineering.

Main Methods:

• Review of current literature on 3D tumor models.
• Discussion of techniques used to enhance 3D tumor model fidelity.
• Analysis of the components of the tumor microenvironment replicated by 3D models (hypoxia, necrosis, angiogenesis, cell adhesion).

Main Results:

• 3D tumor models more closely mimic the in vivo tumor microenvironment compared to 2D models.
• Various 3D tumor models exist, each with specific benefits and drawbacks.
• Techniques like microfluidics, advanced imaging, and tissue engineering are being integrated to improve 3D models.

Conclusions:

• 3D tumor models show significant promise for improving the preclinical screening of cancer therapeutics.
• Further development is needed for widespread adoption of 3D tumor models in pharmaceutical research.
• 3D models represent a critical step towards more predictive in vitro cancer drug evaluation.