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Ann Oncol. 2004 Feb;15(2):252-6.

The clinical significance of Cyclin B1 and Wee1 expression in non-small-cell lung cancer.

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1
Department of Surgery I, Gunma University Faculty of Medicine, Maebashi, Gunma, Japan. ytakeshi@med.gunma-u.ac.jp

Abstract

BACKGROUND:

Cyclin B1 has an important role in the G2-M phase transition of the cell cycle. Wee1 delays mitosis by suppressing the activity of the Cyclin B1/cdc2 complex. The objective of the present study was to elucidate the clinicopathological and prognostic significance of Cyclin B1 and Wee1 expression in non-small-cell lung cancer (NSCLC).

PATIENTS AND METHODS:

An immunohistochemical assessment of Cyclin B1 and Wee1 expression was performed in 79 patients with NSCLC.

RESULTS:

The expression of Cyclin B1 was correlated with differentiation (P = 0.0423) and vascular invasion (P = 0.001). Patients with overexpression of Cyclin B1 had higher mean values for both the Ki-67 proliferative index (Ki-Index) (P <0.0001) and proliferating cell nuclear antigen labeling index (PCNA-LI) (P <0.0001), and a poorer prognosis (P = 0.0068). Patients lacking expression of Wee1 had a higher recurrence rate (P = 0.0084) and a poorer prognosis (P = 0.0457), and tended to have higher Ki-Index and PCNA-LI values. Multivariate analysis suggested that both Cyclin B1 (P = 0.0244) and Wee1 (P = 0.0444) expression were significant prognostic factors.

CONCLUSIONS:

These findings suggest that Cyclin B1 expression could be a significant prognostic parameter in NSCLC. The loss of Wee1 expression may have a potential role in promoting tumor progression and may be a significant prognostic indicator in NSCLC.

PMID:
14760118
[Indexed for MEDLINE]
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