Preservation of Human Cornea

Area of Science:

• Ophthalmology
• Transplantation Biology
• Cell Biology

Background:

• The corneal endothelium is vital for maintaining corneal transparency and graft survival.
• Human corneal endothelial cells have limited regenerative capacity, necessitating effective storage methods.
• Current storage methods aim to preserve endothelial viability to ensure successful corneal transplantation.

Purpose of the Study:

• To review and compare the efficacy of different corneal storage methods.
• To highlight the importance of endothelial cell preservation in corneal transplantation.
• To assess the clinical outcomes associated with hypothermic and organ culture storage.

Main Methods:

• Review of existing literature on corneal storage techniques.
• Analysis of graft outcomes based on storage method (hypothermia vs. organ culture).
• Evaluation of endothelial cell preservation in cryopreserved, hypothermically stored, and organ-cultured corneas.

Main Results:

• Hypothermia (2-8 °C) allows storage for 7-14 days, while organ culture (28-37 °C) extends storage to 4 weeks.
• Cryopreservation is complex and can cause endothelial damage, limiting its widespread application.
• Graft outcomes for corneas stored by hypothermia and organ culture appear comparable.

Conclusions:

• Effective preservation of the corneal endothelium is paramount for successful corneal transplants.
• Organ culture offers extended storage times compared to hypothermia, with similar clinical outcomes.
• Both hypothermia and organ culture are effective methods for corneal storage, supporting clinical transplantation success.