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Cellular Encapsulation in 3D Hydrogels for Tissue Engineering

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The Diffusive Properties of Hydrogel Microcapsules for Cell Encapsulation.

D M Lavin^1,2, B E Bintz^1,2, C G Thanos³

¹Cytosolv, Inc., 117 Chapman St., Suite 107, Providence, RI, USA.

Methods in Molecular Biology (Clifton, N.J.)

|October 15, 2016

Summary

Hydrogel microcapsules offer advantages for cell encapsulation and disease treatment, but their small size poses retrieval challenges. This study evaluates techniques for assessing hydrogel microcapsule permeability and pore structure.

Keywords:

Alginate Cell transplantation Diffusion Encapsulation Microcapsule

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Cellular Encapsulation in 3D Hydrogels for Tissue Engineering

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Microfluidic Fabrication of Core-Shell Microcapsules carrying Human Pluripotent Stem Cell Spheroids

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Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications

Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications

Published on: September 29, 2016

Area of Science:

Biomaterials Science
Chemical Engineering
Regenerative Medicine

Background:

Hydrogel microcapsules are widely used for cell encapsulation in treating diseases like Type I Diabetes.
Their favorable surface area to volume ratio enhances cellular cargo efficiency and nutrient exchange.
A key challenge is the difficult retrievability of these microcapsules, especially with advanced stem cell applications.

Purpose of the Study:

To present techniques for evaluating hydrogel microcapsule permeability and pore structure.
To introduce a model for alginate-polycation-alginate (APA) microcapsule diffusive behavior.
To describe a method for analyzing the ultrastructure of APA membranes.

Main Methods:

Evaluation of hydrogel microcapsule permeability and pore structure.
Development of a model for alginate-polycation-alginate (APA) microcapsule diffusive behavior.
Morphometric analysis of APA membrane ultrastructure.

Main Results:

The study focuses on techniques to assess microcapsule properties, addressing the retrievability paradox.
A simplistic model is proposed for describing the diffusive behavior of APA microcapsules.
An ancillary method is presented for evaluating the ultrastructure of the APA membrane.

Conclusions:

Understanding and evaluating hydrogel microcapsule permeability and pore structure is crucial for optimizing their therapeutic applications.
The presented techniques and models aid in characterizing these microcapsules.
Further research into improving microcapsule retrievability is warranted.