Engineering programmable tumor microenvironment interactions through single-cell bioprinting of spatially defined...

Area of Science:

• Oncology
• Biotechnology
• Spatial Biology

Background:

• Cancer evolution is driven by interactions between malignant cells and the tumor microenvironment.
• Spatial biology studies show correlations between tissue spatial features and clinical outcomes.
• Mechanisms of cell interaction propagation in cancer evolution are difficult to study in native tissues.

Purpose of the Study:

• To develop a platform for precisely engineering tumor microenvironment interactions.
• To investigate how cancer cell density and spatial arrangement influence tumor-relevant behaviors.
• To move from correlative spatial observations to controlled studies of cancer progression.

Main Methods:

• Utilized single-cell bioprinting to create spatially defined cell microarrays.
• Engineered reductionist microenvironments by combining breast cancer cells with patient-derived myoepithelial cells.
• Systematically controlled cell composition, spacing, density, and spatial arrangement.

Main Results:

• Increased local cancer cell density suppressed myoepithelial cell migration and promoted cancer cell territorial expansion.
• Spatial arrangement, independent of cell number and ratio, altered cancer cell behavior, influencing confinement or displacement.
• Demonstrated that engineered microenvironments can program cancer cell behavior.

Conclusions:

• Single-cell bioprinting provides a platform for dissecting the role of cell interactions in cancer progression.
• This technology enables controlled investigation of how local cellular neighborhoods shape cancer evolution.
• The findings highlight the importance of spatial organization in regulating tumor-host interactions.