The corneal epithelium is composed of nonkeratinized stratified squamous cells and has a significant turnover rate. Limbal integrity is vital to maintain the clarity and avascularity of the cornea as well as regeneration of the corneal epithelium. Limbal epithelial stem cells (LESCs) are located in the basal epithelial layer of the limbus and preserve this homeostasis. Proper functioning of LESCs is dependent on a specific microenvironment, known as the limbal stem cell niche (LSCN). This structure is made up of various cells, an extracellular matrix (ECM), and signaling molecules. Different etiologies may damage the LSCN, leading to limbal stem cell deficiency (LSCD), which is characterized by conjunctivalization of the cornea. In this review, we first summarize the basics of the LSCN and then focus on current and emerging bioengineering strategies for LSCN restoration to combat LSCD.
机构:
Quinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France
Univ Paris 06, Vis Inst, UMR S INSERM 968, CHNO 15 20 CNRS U968,UMR 7210, F-75252 Paris 05, FranceQuinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France
Grieve, K.
Ghoubay, D.
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机构:
Quinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France
Univ Paris 06, Vis Inst, UMR S INSERM 968, CHNO 15 20 CNRS U968,UMR 7210, F-75252 Paris 05, FranceQuinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France
机构:
Quinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France
Univ Paris 06, Vis Inst, UMR S INSERM 968, CHNO 15 20 CNRS U968,UMR 7210, F-75252 Paris 05, FranceQuinze Vingts Natl Ophthalmol Hosp, F-75012 Paris, France