Abstract

In the past few years, intensive research has focused on corneal stem cells as an unlimited source for cell-based therapy in regenerative ophthalmology. Today, it is known that the cornea has at least two types of stem cells: limbal epithelial stem cells (LESCs) and corneal stromal stem cells (CSSCs). LESCs are used for regeneration of corneal surface, while CSSCs are used for regeneration of corneal stroma. Until now, various approaches and methods for isolation of LESCs and CSSCs and their successful transplantation have been described and tested in several preclinical studies and clinical trials. This review describes in detail phenotypic characteristics of LESCs and CSSCs and discusses their therapeutic potential in corneal regeneration. Since efficient and safe corneal stem cell-based therapy is still a challenging issue that requires continuous cooperation between researchers, clinicians, and patients, this review addresses the important limitations and suggests possible strategies for improvement of corneal stem cell-based therapy.

Highlights

  • The cornea represents the part of transparent tissue at the front of the eye

  • limbal epithelial stem cells (LESCs) are used for regeneration of corneal surface while corneal stromal stem cells (CSSCs) are used for corneal stromal regeneration

  • We have described in detail phenotype and characteristics of LESCs and CSSCs and discussed their therapeutic potential in regenerative ophthalmology

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Summary

Introduction

The cornea represents the part of transparent tissue at the front of the eye. It poses a protective physical and biological barrier against the outside environment and gives a refractive power to concentrate light onto the retina. The remarkable progress, which could sidestep the constraints of current treatments, has been made with the development of an autologous transplant of cultured endothelial cells into a patient’s anterior chamber that can redesign the corneal tissue and with the generation of corneal stroma-like tissue developed from autologous stem cells [8]. With respect to the latter, in the past few years, intensive research has focused on corneal stem cells as a source of regenerative cell-based therapy. We have described in detail phenotype and characteristics of LESCs and CSSCs and discussed their therapeutic potential in regenerative ophthalmology

Characteristics of LESCs
Characteristics of CSSCs
Differentiation of Pluripotent Stem Cells into
Therapeutic Potential of LESCs and CSSCs
New Paradigm
Opportunities and Challenges in Regenerative Ophthalmology
Findings
Conclusion

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