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Updated: Aug 21, 2026
Characterization of In Vitro Differentiation of Human Primary Keratinocytes by RNA-Seq Analysis
Published on: May 16, 2020
Microarray analysis identified differentially expressed genes in keratocytes from keratoconus patients
Nguyen Thanh Ha1, Kiyoo Nakayasu, Akira Murakami
1Department of Ophthalmology, Juntendo University School of Medicine, Tokyo, Japan. hant02@yahoo.com
Purpose:
To identify differentially expressed genes in human keratoconus keratocyte by cDNA microarray.
Methods:
Normal and keratoconic cornea were cultured for keratocytes. RNA was extracted. cDNA probe labeled with fluorescence dye was made from Poly A+ RNA, hybridized with microarray slide, containing 164 human apoptosis genes. Signal intensity was measured. Expression ratio between keratoconus and normal was determined using ImaGene Ver.3.0. Identified genes were further evaluated by RT-PCR and real-time PCR.
Results:
Five over-expressed and four under-expressed genes were identified. Of these, differential expression of tumor necrosis factor alpha-induced protein 6 (TNFAIP6), human insulin-like growth factor binding protein 5 (IGFBP5), and IGFBP3 were verified and confirmed by RT-PCR. Real-time PCR showed TNFAIP6 increased by 3.3 folds, while IGFBP5, IGFBP3 decreased by 14 and 11 folds respectively.
Conclusions:
The identified genes could be important and deserve further investigation. Significant differential expression of TNFAIP6, IGFBP5, and IGFBP3 may indicate an important role of these genes in the mechanism underlying stromal thinning.