The progress in techniques for culturing human limbal epithelial stem cells.

Area of Science:

• Ophthalmology
• Stem Cell Biology
• Tissue Engineering

Background:

• Limbal stem cell deficiency (LSCD) causes vision-threatening corneal defects.
• Traditional hLESC culture uses xenogenous components and conventional substrates.
• Current methods pose risks of immunogenicity and lower biosafety.

Purpose of the Study:

• To review innovations in in vitro human limbal epithelial stem cell (hLESC) culture.
• To highlight advancements enhancing biosafety and reducing immunogenicity.
• To assess the suitability of cultured hLESCs for cell therapy.

Main Methods:

• Review of recent progress in hLESC culture techniques.
• Focus on removal of xenogenous components (e.g., FBS, murine feeders).
• Exploration of novel scaffolds, human feeders, and 3D culture systems.

Main Results:

• Innovations include xenogen-free media and human feeder cells.
• Novel scaffolds and 3D artificial niches improve cell outgrowth.
• 3D cultures better mimic the limbal stem cell niche environment.

Conclusions:

• Modern hLESC culture techniques significantly improve biosafety.
• These advancements enhance cell proliferation and adaptability for clinical use.
• Improved in vitro cultured hLESCs are more suitable for LSCD cell therapy.