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Cyclin-dependent kinase inhibitor p27 is related to cell proliferation and prognosis in laryngeal squamous cell carcinomas

Published online by Cambridge University Press:  08 March 2006

Nobuaki Tamura ,
Youyi Dong ,
Li Sui ,
Yuji Tai ,
Katsuyoshi Sugimoto ,
Shunichiro Nagahata  and
Masaaki Tokuda
Nobuaki Tamura
Affiliation:
Department of Oral and Maxillofacial Surgery, Kagawa Medical University, Kagawa, 761-0793, Japan.
Youyi Dong
Affiliation:
Department of Physiology, Kagawa Medical University, Kagawa, 761-0793, Japan.
Li Sui
Affiliation:
Department of Perinato-Gynecology, Kagawa Medical University, Kagawa, 761-0793, Japan.
Yuji Tai
Affiliation:
Department of Physiology, Kagawa Medical University, Kagawa, 761-0793, Japan.
Katsuyoshi Sugimoto
Affiliation:
Department of Physiology, Kagawa Medical University, Kagawa, 761-0793, Japan.
Shunichiro Nagahata
Affiliation:
Department of Oral and Maxillofacial Surgery, Kagawa Medical University, Kagawa, 761-0793, Japan.
Masaaki Tokuda
Affiliation:
Department of Physiology, Kagawa Medical University, Kagawa, 761-0793, Japan.
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Abstract

An immunohistochemical study of both p27 and proliferating cell nuclear antigen (PCNA) was performed on 102 cases of laryngeal squamous cell carcinomas (LSCCs), and large variations in p27 expression were found among the tumours. Reduced expression of p27 was revealed in 54 (52.9 per cent) cases and correlated with tumour size, lymph node metastasis, and clinical stage, but did not correlate with age, sex, tumour site, or tumour grade. A significant positive correlation was found between the percentage of loss of p27 expression and the PCNA index (r = 0.844, p < 0.0001). Reduced expression of p27 was significantly correlated with both reducing disease-free and overall survival by univariate analysis. By multivariate analysis, reduced expression of p27, tumour grade, tumour size, lymph node metastasis as well as clinical stage were independent prognostic factors for overall survival of LSCCs. These findings indicate that reduced expression of p27 may be correlated with the malignant biological behaviour of LSCCs.

Keywords

LarynxCarcinomaSquamous CellImmunohistochemistry
Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 115 , Issue 5 , May 2001 , pp. 400 - 406
Copyright
© Royal Society of Medicine Press Limited 2001

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