Quantification of corneal neovascularization after ex vivo limbal epithelial stem cell therapy

Adriano Guarnieri, Javier Moreno-Montañés, Belén Alfonso-Bartolozzi, Alfonso L. Sabater, María García-Guzmán, Enrique J. Andreu, Felipe Prosper

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

AIM: To assess cultured limbal epithelial stem cell transplantation in patients with limbal stem cell deficiency by analyzing and quantifying corneal neovascularization. METHODS: This retrospective, interventional case series included eight eyes with total limbal stem cell deficiency. Ex vivo limbal epithelial stem cells were cultured on human amniotic membrane using an animal- free culture method. The clinical parameters of limbal stem cell deficiency, impression cytology, and quantification of corneal neovascularization were evaluated before and after cultured limbal stem cell transplantation. The area of corneal neovascularization, vessel caliber (VC), and invasive area (IA) were analyzed before and after stem cell transplantation by image analysis software. Best-corrected visual acuity (BCVA), epithelial transparency, and impression cytology were also measured. RESULTS: One year after surgery, successful cases showed a reduction (improvement) of all three parameters of corneal neovascularization [neovascular area (NA), VC, IA], while failed cases did not. NA decreased a mean of 32.31% (P=0.035), invasion area 29.37% (P=0.018) and VC 14.29% (P=0.072). BCVA improved in all eyes (mean follow -up, 76 ±21mo). Epithelial transparency improved significantly from 2.00± 0.93 to 0.88±1.25 (P=0.014). Impression cytology showed that three cases failed after limbal epithelial stem cell therapy before 1y of follow-up. CONCLUSION: This method of analyzing and monitoring surface vessels is useful for evaluating the epithelial status during follow-up, as successful cases showed a bigger reduction in corneal neovascularization parameters than failed cases. Using this method, successful cases could be differentiated from failed cases.

Original languageEnglish (US)
Pages (from-to)988-995
Number of pages8
JournalInternational Journal of Ophthalmology
Volume7
Issue number6
DOIs
StatePublished - Dec 18 2014
Externally publishedYes

Keywords

  • Corneal neovascularization
  • Impression cytology
  • Limbal stem cell
  • Limbal stem cell deficiency
  • Stem cell therapy

ASJC Scopus subject areas

  • Ophthalmology

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