Recreating the microenvironment of the native cornea for tissue engineering applications

Area of Science:

• Biomaterials Science
• Ophthalmology
• Tissue Engineering

Background:

• Corneal tissue engineering requires transparent, mechanically resilient scaffolds that support cellular function.
• Mimicking the native corneal extracellular matrix (ECM) is crucial for developing functional corneal replacements.
• Collagen type I fibers in the native cornea are approximately 30 nm in diameter and arranged in aligned lamellae.

Purpose of the Study:

• To develop an electrospinning method for creating collagen type I fiber scaffolds that replicate the native corneal ECM structure.
• To evaluate the suitability of these electrospun scaffolds for tissue-engineered corneal applications.

Main Methods:

• Electrospinning of collagen type I to create aligned fibers using a dual-plate device with a quartz glass substrate.
• Crosslinking of fibers using glutaraldehyde vapor and liquid glutaraldehyde for stabilization and sterilization.
• Culture of rabbit corneal fibroblasts on the electrospun scaffolds for 7 days.

Main Results:

• The electrospinning method successfully produced uniformly aligned collagen type I fibers mimicking native corneal morphology.
• Rabbit corneal fibroblasts cultured on the scaffolds exhibited viable morphology and intracellular protein expression.
• The electrospun collagen constructs demonstrated potential as a scaffold for corneal tissue engineering.

Conclusions:

• Electrospun collagen type I fibers can replicate the microenvironment of the native corneal ECM.
• These aligned collagen scaffolds provide a viable substrate for corneal fibroblast growth and function.
• This approach offers a promising strategy for developing functional tissue-engineered corneal replacements.