Preparation of Extracellular Matrix Paper and Construction of Multi-Layered 3D Tissue Model

Area of Science:

• Tissue Engineering
• Biomaterials Science
• Regenerative Medicine

Background:

• Current 3D tissue engineering methods face limitations in extracellular matrix (ECM) concentration and tissue thickness due to poor nutrient/oxygen permeability.
• Insolubility of natural ECM hinders its direct use as a cell scaffold without chemical modification.
• Living tissues exhibit complex multi-layered structures, such as skin and blood vessels, which are challenging to replicate.

Purpose of the Study:

• To develop a novel method for constructing thick, multi-layered 3D tissues with controllable ECM and cell layers.
• To overcome limitations of previous tissue engineering approaches regarding ECM concentration and permeability.
• To create a versatile platform for assembling complex tissue models.

Main Methods:

• Preparation of a paper-like scaffold (ECM paper) from micro-fibered natural ECM.
• Construction of 3D multi-layered tissues by stacking cell-seeded ECM papers.
• Characterization of ECM paper's fibrous structure, permeability, and cell migration properties.

Main Results:

• The developed ECM paper scaffold exhibits high ECM concentration and stability under physiological conditions.
• The fibrous structure of ECM paper ensures high permeability, facilitating nutrient and oxygen diffusion.
• The stacking method allows for precise control over the thickness and composition of both ECM and cell layers in the 3D tissue.

Conclusions:

• This protocol enables the construction of precisely controlled, multi-layered 3D tissues using ECM paper.
• The method overcomes previous limitations in tissue thickness and ECM concentration, offering improved cellular function.
• The developed approach holds significant potential for the assembly of advanced tissue models for research and therapeutic applications.