Sequential stenciling to reconstitute 2D microtissues for multicellular and synthetic signaling architectures

Area of Science:

• Biotechnology
• Tissue Engineering
• Cell Biology

Background:

• Native tissue function relies on intricate cellular organization.
• 2D in vitro platforms allow studying cell interactions but often lack spatial precision.
• Developing high-throughput, high-resolution methods for recreating tissue architecture is crucial.

Purpose of the Study:

• To develop a cost-effective and user-friendly method for creating spatially defined multicellular in vitro systems.
• To demonstrate the utility of this stencil-based patterning strategy in modeling complex tissue microenvironments.
• To enable high-throughput drug screening and dissection of tissue-specific cellular interactions.

Main Methods:

• Combined stereolithography (3D printing) with replica molding for precise stencil fabrication.
• Utilized sequential stencil application and removal for controlled multi-cell type positioning.
• Developed a scalable system compatible with 96-well plates for ease of use.

Main Results:

• Successfully recreated tumor microenvironment models, showing cancer-associated fibroblast encapsulation of colorectal cancer cells.
• Demonstrated mimicry of morphogen gradient formation using engineered signaling systems in patterned cell patches.
• Replicated mammalian intestinal crypt-villus architecture by patterning intestinal organoids.

Conclusions:

• The stencil-based patterning strategy enables rebuilding multicellular tissue architectures in vitro with biologically relevant spatial precision.
• This method facilitates high-throughput drug screening and detailed investigation of cellular interactions within engineered tissues.
• The technique offers a versatile platform for advancing tissue engineering and regenerative medicine research.