Authors: Yoshida, T.; Tanaka, S.; Mogi, A.; Shitara, Y.; Kuwano, H.

Source: Annals of Oncology, Volume 15, Number 2, February 2004 , pp. 252-256(5)

Publisher: Oxford University Press

Abstract:

Background:

Cyclin B1 has an important role in the G<inf>2</inf>–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.

Keywords: cell cycle; Cyclin B1; differential PCR; immunohistochemistry; non-small-cell lung cancer; Wee1

Document Type: Research article

DOI: http://dx.doi.org/10.1093/annonc/mdh073

Publication date: 2004-02-01

More about this publication?

• Annals of Oncology is a multidisciplinary journal that publishes articles addressing medical oncology, surgery, radiotherapy, paediatric oncology, basic research and the comprehensive management of patients with malignant diseases.

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