Hydrogel Encapsulation of Cells in Core-Shell Microcapsules for Cell Delivery

Area of Science:

• Biomaterials Engineering
• Cell Encapsulation Technology
• Drug Delivery Systems

Background:

• Traditional cell encapsulation methods often face challenges with cell viability and immune rejection.
• Developing advanced microcapsule structures is crucial for effective cell-based therapies and diagnostics.

Purpose of the Study:

• To fabricate and characterize a novel 3D core-shell microcapsule structure for improved cell encapsulation.
• To evaluate the viability and functionality of cells encapsulated within the core-shell microcapsules.
• To explore the potential of this structure for multifunctional applications.

Main Methods:

• Fabrication of core-shell microcapsules using a coaxial dual-nozzle electrospinning system.
• Characterization of microcapsule size, structure, and shell thickness.
• Assessment of encapsulated cell viability and survival rates post-encapsulation and during culture.

Main Results:

• Successfully generated spherical alginate microcapsules with a core-shell structure (<300 μm diameter).
• Demonstrated superior cell encapsulation and immune protection compared to traditional microbeads.
• Observed high cell viability (≈80%) post-encapsulation, with sustained viability over 3 days in culture.
• Showcased tunable core and shell thickness via flow rate manipulation.

Conclusions:

• The novel 3D core-shell microcapsule design significantly enhances cell encapsulation efficiency and viability.
• The structure provides a protective environment for encapsulated cells, maintaining their survival through nutrient and oxygen supply.
• This platform holds promise for versatile applications in cell delivery, factor delivery, imaging, and diagnostics.