Corneal Regeneration and Limbal Stem Cell Therapy

The cornea serves as the eye’s primary refractive surface and protective barrier. Injury, inflammation or genetic disorders can deplete the specialised stem cells located at the limbus, leading to limbal stem cell deficiency (LSCD), corneal opacity and vision loss. Corneal regeneration strategies seek to restore a healthy epithelial surface and underlying stromal architecture. Conventional approaches include autologous or allogeneic limbal graft transplantation, cultivated limbal epithelial transplantation (CLET) and simple limbal epithelial transplantation (SLET). Recent advances leverage bioengineered scaffolds, cell sheets derived from induced pluripotent stem cells (iPSCs) and endogenous stimulation devices to promote cell survival, differentiation and orderly tissue reconstruction. Multifaceted programmes now encompass scaffold design, niche modulation and growth-factor delivery to address stromal fibrosis, inflammation and mechanical support. These developments offer renewed hope for durable visual rehabilitation and reduced dependence on donor tissue.

Research from Nature Portfolio

Researchers have developed a blink-driven piezoelectric contact lens that converts eyelid motion into a pulsed electric field, accelerating epithelial repair and reducing stromal fibrosis in animal models. This lens enhances orderly epithelial differentiation and blocks pro-fibrotic signalling, restoring over 50 per cent of corneal clarity within eight days. In parallel, a three-dimensional microfibre-hydrogel scaffold composed of aligned poly(caprolactone) microfibres infused with gelatin methacrylate (GelMA) has been shown to mimic native stromal topography. When seeded with limbal stromal stem cells, this construct preserves keratocyte phenotype in serum-free conditions and promotes in vivo stromal regeneration, demonstrating maintenance of transparency and mechanical integrity.

Corneal Regeneration and Limbal Stem Cell Therapy publication trend

The graph below shows the total number of articles in corneal regeneration and limbal stem cell therapy across all publications each year (not limited to Nature Index journals).

Technical terms

Limbal Stem Cell Deficiency (LSCD): A condition characterised by loss or dysfunction of limbal epithelial stem cells, leading to corneal epithelial breakdown, conjunctivalisation, neovascularisation and opacity.

Induced Pluripotent Stem Cells (iPSCs): Somatic cells reprogrammed to a pluripotent state, capable of differentiating into corneal epithelial lineages and forming cell sheets for transplantation.

Cultivated Limbal Epithelial Transplantation (CLET): A clinical technique in which limbal epithelial cells are expanded ex vivo on a carrier substrate before being grafted onto the damaged ocular surface.

Hydrogel Scaffold: A three-dimensional, water-retaining polymer network used to support cell adhesion, proliferation and phenotypic maintenance in tissue engineering applications.

References

1. Induced pluripotent stem-cell-derived corneal epithelium for transplant surgery: a single-arm, open-label, first-in-human interventional study in Japan. The Lancet (2024).
2. Snowflake-inspired and blink-driven flexible piezoelectric contact lenses for effective corneal injury repair. Nature Communications (2023).
3. Fiber reinforced GelMA hydrogel to induce the regeneration of corneal stroma. Nature Communications (2020).
4. Limbal Stem Cell Deficiency: Current Treatment Options and Emerging Therapies. Stem Cells International (2015).