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Three-dimensional hydrogel model using adipose-derived stem cells for vocal fold augmentation.

Hyoungshin Park¹, Sandeep Karajanagi, Kathryn Wolak

¹Department of Surgery, Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.

Tissue Engineering. Part A

|September 5, 2009

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Hydrogels containing fibrin, like fibrin-hyaluronic acid cogels, effectively promote adipose-derived stem cell (ASC) differentiation for vocal fold tissue engineering. These scaffolds enhance cell proliferation and elastin expression, crucial for rebuilding vocal fold lamina propria.

Area of Science:

Biomaterials Science
Regenerative Medicine
Tissue Engineering

Background:

Adipose-derived stem cells (ASCs) show potential for vocal fold tissue repair.
Developing suitable scaffolds is crucial for directing ASC differentiation into vocal fold lamina propria fibroblasts.

Purpose of the Study:

To investigate the impact of various hydrogels on ASC differentiation.
To identify optimal scaffold conditions for vocal fold tissue engineering.

Main Methods:

Human ASCs were isolated and characterized.
ASCs were cultured in five different 3D hydrogels: hyaluronic acid (HA), collagen, fibrin, and cogels (fibrin-collagen, fibrin-HA).
Cell proliferation (DNA content), morphology, and gene expression (elastin, decorin) were assessed.

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Three-Dimensional Cell Culture of Adipose-Derived Stem Cells in a Hydrogel with Photobiomodulation Augmentation

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Main Results:

Fibrin-based hydrogels and cogels significantly increased total DNA content compared to HA and collagen.
Elastin expression was notably higher in cells cultured within fibrin-based gels.
Cells in cogels exhibited elongated morphology, decorin expression, and glycosaminoglycan synthesis, indicating differentiation.

Conclusions:

Hydrogel scaffolds can influence ASC differentiation for vocal fold tissue engineering.
Fibrin-containing cogels (fibrin-HA, fibrin-collagen) enhance ASC proliferation, differentiation, and elastin production.
These findings suggest a pathway for controlling ASC differentiation for vocal fold repair applications.