Down-regulation of keratin 4 and keratin 13 expression in oral squamous cell carcinoma and epithelial dysplasia: a clue for histopathogenesis
Article first published online: 3 MAR 2011
© 2011 Blackwell Publishing Limited
Volume 58, Issue 4, pages 531–542, March 2011
How to Cite
Sakamoto, K., Aragaki, T., Morita, K.-i., Kawachi, H., Kayamori, K., Nakanishi, S., Omura, K., Miki, Y., Okada, N., Katsube, K.-i., Takizawa, T. and Yamaguchi, A. (2011), Down-regulation of keratin 4 and keratin 13 expression in oral squamous cell carcinoma and epithelial dysplasia: a clue for histopathogenesis. Histopathology, 58: 531–542. doi: 10.1111/j.1365-2559.2011.03759.x
- Issue published online: 17 MAR 2011
- Article first published online: 3 MAR 2011
- Date of submission 10 July 2009 Accepted for publication 26 April 2010
- epithelial dysplasia;
- keratin 4;
- keratin 13;
- oral mucosa;
- squamous cell carcinoma
Sakamoto K, Aragaki T, Morita K-i, Kawachi H, Kayamori K, Nakanishi S, Omura K, Miki Y, Okada N, Katsube K-i, Takizawa T & Yamaguchi A (2011) Histopathology58, 531–542 Down-regulation of keratin 4 and keratin 13 expression in oral squamous cell carcinoma and epithelial dysplasia: a clue for histopathogenesis
Aims: This study aimed to identify relevant keratin subtypes that may associate with the pathogenesis of oral epithelial neoplasms.
Methods and results: Expression of all the keratin subtypes was examined by cDNA microarray analysis of 43 oral squamous cell carcinoma (OSCC) cases. Immunohistochemical expression of the major keratins was examined in 100 OSCC and oral epithelial dysplasia (OED) cases. Many changes in keratin expression were observed and, significantly, consistent down-regulation of keratin 4 (K4) and K13 expression was observed. Aberrant expression of K4 and K13 was associated with morphological changes in the affected oral epithelium. Experiments with cell cultures transfected with various keratin subtypes suggested that alterations in keratin subtype expression can cause changes in cell shape and movement.
Conclusions: Aberrant expression of K4 and K13, which are the dominant pair of differentiation-related keratins in oral keratinocytes, indicates dysregulation of epithelial differentiation in OSCC and OED. These keratins, especially K4, may be useful for pathological diagnosis. We propose that the aberrant expression of K4 and K13 and concomitant up-regulation of the other keratins may be one of the causative factors for morphological alterations in the affected epithelium.