Tunable Hydrogels from Pulmonary Extracellular Matrix for 3D Cell Culture

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Developing suitable in vitro models for lung research is crucial.
• Existing cell culture methods often fail to replicate the complex lung microenvironment.
• There is a need for biomaterials that can support complex lung cell cultures.

Purpose of the Study:

• To present a method for establishing multi-component cell culture hydrogels for in vitro lung cell culture.
• To characterize the resulting hydrogel properties and their suitability for cell culture.
• To demonstrate the versatility of the hydrogel for different cell culture formats.

Main Methods:

• En bloc lung tissue from porcine, rat, or mouse was decellularized using chemical detergents.
• Decellularized tissue was lyophilized, cryomilled into powder, and digested with pepsin.
• The resulting pregel solution was neutralized, gelated at 37°C, and could be modified for stiffness.

Main Results:

• Decellularization removed over 95% of double-stranded DNA and cellular debris.
• The hydrogel supported cell attachment, migration, and 3D culture.
• The hydrogel could be stored for up to two weeks and its stiffness modulated.

Conclusions:

• A robust method for creating lung-derived hydrogels for in vitro cell culture was established.
• These hydrogels provide a promising scaffold for lung tissue engineering and disease modeling.
• The developed hydrogel system offers flexibility for various cell culture applications.