Transcriptional profiles along cell programming into corneal epithelial differentiation
María Teresa Ortiz-Melo1, Maria Jimena Garcia-Murillo2, Víctor Manuel Salazar-Rojas3
1Department of Cell Biology, Centro de Investigación y de Estudios Avanzados del IPN, Apdo. Postal 14-740. México City, 07000, Mexico; Unidad de Biotecnología y Prototipos, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Ap. Postal 314, 54000, Tlalnepantla, Edo. de México, Mexico; Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México. Unidad de Posgrado, Edificio A, 1° Piso, Circuito de Posgrados, Ciudad Universitaria, Coyoacán, C.P. 04510, Ciudad de México, Mexico.
Experimental Eye Research
|October 25, 2020
Summary
This study identifies distinct gene signatures across three corneal epithelial cell differentiation stages. Understanding these corneal differentiation pathways is key to unraveling epithelial development.
Area of Science:
- Stem Cell Biology
- Epithelial Differentiation
- Transcriptomics
Background:
- Corneal epithelial cell differentiation involves complex regulatory mechanisms.
- Understanding progenitor cell states is crucial for regenerative medicine and disease modeling.
- Rabbit corneal epithelial cell line RCE1(5T5) serves as a model for studying these processes.
Purpose of the Study:
- To characterize and differentiate three distinct stages of corneal epithelial cell development.
- To identify gene expression profiles and key transcription factors associated with each stage.
- To explore the regulatory networks governing corneal epithelial differentiation.
Main Methods:
- Utilized the RCE1(5T5) rabbit corneal epithelial cell line.
- Analyzed three differentiation stages based on cell growth and morphology.
- Performed RNA sequencing (RNAseq) based transcriptome analysis.
- Examined expression of transcription factors (Oct4, Pax6, ΔNp63α, Six3, Six4, Cux1, KLF4, Sox9), signaling markers (Notch receptors, WNT10A), and epigenetic markers (Prdm3).
Main Results:
- Identified 4891 differentially expressed genes across the three stages.
- Proliferative cells (1278 genes) exhibit an early progenitor phenotype (Oct4+, KLF4+, ΔNp63α+).
- Committed cells (417 genes) show early differentiation markers and potential Six3/Six4 involvement.
- Stratified epithelium (979 genes) displays increased WNT10A, Notch signaling, Cux1, Pax6, KLF4, and Sox9 expression.
- Differentiated cells express approximately 50% of genes within the Epidermal Differentiation Complex (EDC).
Conclusions:
- Distinct transcriptomic signatures define proliferative, committed, and stratified corneal epithelial stages.
- Key transcription factors and signaling pathways (Notch, WNT) orchestrate corneal epithelial differentiation.
- Comparative analysis with epidermal differentiation may elucidate unique corneal regulatory mechanisms.
Keywords:
Cell cultureCorneal epithelial differentiationDifferential gene expressionRNA-Seq profilingTranscriptomeMore Related Videos
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