The Human Tissue-Engineered Cornea (hTEC): Recent Progress

Area of Science:

• Ophthalmology
• Biomaterials Science
• Tissue Engineering

Background:

• Job-related eye injuries affect approximately 2000 U.S. workers daily.
• Corneal diseases are a leading cause of blindness globally, with millions awaiting transplantation.
• A significant shortage of donor corneas necessitates the development of viable alternatives.

Purpose of the Study:

• To review advancements in human tissue-engineered corneas (hTECs) as substitutes for corneal grafting.
• To highlight 3D tissue-engineered models that closely mimic native corneal architecture.
• To explore the potential of hTECs in understanding corneal diseases and drug development.

Main Methods:

• Development of 3D tissue-engineered corneas using untransformed human corneal epithelial cells.
• Utilizing a natural stroma synthesized by living corneal fibroblasts.
• Focusing on models that replicate in vivo cell phenotype and tissue architecture.

Main Results:

• Engineered corneas exhibit appropriate histology and express key extracellular matrix components and integrins.
• 3D hTECs demonstrate tissue development and cell arrangement properties similar to native corneas.
• These biological constructs show promise as alternatives to cadaveric corneal grafts.

Conclusions:

• Completely biological hTECs are highly promising for corneal grafting.
• These engineered tissues serve as valuable models for studying corneal diseases and wound healing.
• hTECs can aid in the development of novel therapeutic strategies for eye conditions.