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Updated: Dec 10, 2025
Author Spotlight: Standardizing Limbal Niche Cell (LNC) Isolation and Characterization to Support Widespread LNC Research
Published on: October 27, 2023
Expansion of Human Limbal Epithelial Stem/Progenitor Cells Using Different Human Sera: A Multivariate Statistical
Raquel Hernáez-Moya1, Sheyla González2, Arantza Urkaregi3
1Department of Cell Biology and Histology, School of Medicine and Nursing, Biocruces Bizkaia Health Research Institute, University of the Basque Country UPV/EHU, 48940 Leioa, Bizkaia, Spain.
Human limbal epithelial stem cells (LESCs) cultured with human sera promote faster growth and maintain stem cell phenotype compared to fetal bovine serum (FBS). This research offers insights into optimizing LESC culture for corneal regeneration therapies.
Area of Science:
- Ophthalmology
- Stem Cell Biology
- Tissue Engineering
Background:
- Limbal epithelial stem/progenitor cells (LESCs) transplantation restores corneal surface integrity in ~76% of patients with limbal stem cell deficiency.
- Current LESC expansion protocols often utilize xenogeneic products, posing health risks.
- Alternative culture media are needed to ensure patient safety and efficacy.
Purpose of the Study:
- To compare the effects of fetal bovine serum (FBS) versus two types of human sera on limbal explant culture.
- To analyze cell morphology, growth rate, and expression of stem/progenitor and differentiation markers.
- To investigate how bioactive molecules in human sera influence LESC phenotype using multivariate statistical analysis.
Main Methods:
- Limbal explants were cultured on denuded amniotic membrane using SHEM supplemented with FBS or human sera.
- Cell morphology, size, and growth rate were assessed.
- Expression levels of p63α (stem cell marker) and K12 (differentiation marker) were quantified.
- Bioactive molecules in human sera were measured, and data underwent multivariate statistical analysis.
Main Results:
- LESCs cultured with human sera exhibited faster growth rates compared to FBS cultures.
- Human sera cultures maintained a higher proportion of small-sized cells and increased p63α expression.
- Cytokeratin K12 expression was lower in human sera-cultured cells, indicating a preserved stem/progenitor phenotype.
- Multivariate analysis revealed specific molecular factors in human sera influencing cell phenotype.
Conclusions:
- Human sera support robust LESC expansion while preserving their stem/progenitor characteristics, outperforming FBS.
- This study provides a foundation for developing safer, xenogeneic-free culture systems for corneal regenerative medicine.
- Understanding the impact of culture components on cell phenotype is crucial for optimizing therapeutic outcomes.
