Is time an extra dimension in 3D cell culture?

Area of Science:

• Biomedical Engineering
• Cell Biology
• Tissue Engineering

Background:

• The temporal microenvironment in 3D cell culture is often overlooked.
• 3D systems are dynamic, with bidirectional signaling between cells and their environment over time.
• Cells can modulate their microenvironment as culture progresses.

Purpose of the Study:

• To illustrate the relationship between the temporal dimension and other microenvironmental parameters in 3D cell culture.
• To demonstrate how time influences the significance of exogenously incorporated microenvironmental factors (MEFs).
• To guide the design of 3D platforms for improved in vivo relevance.

Main Methods:

• Analysis of temporal dynamics in 3D cell culture systems.
• Investigation of cell-microenvironment interactions over time.
• Evaluation of the impact of time on exogenously added microenvironmental factors.

Main Results:

• The temporal dimension significantly affects the microenvironment in 3D cell cultures.
• Exogenously incorporated microenvironmental factors (MEFs) diminish in importance over time.
• The complexity of 3D constructs needs to be optimized for in vivo-like responses.

Conclusions:

• Temporal considerations are crucial for understanding and optimizing 3D cell culture.
• Simplifying 3D construct design by accounting for temporal changes is feasible.
• Establishing the optimal complexity of 3D constructs is key for emulating in vivo outcomes.