Background The p16INK4A protein (p16) is a cyclin-dependent kinase inhibitor that arrests the cell cycle in the G1 phase.
Aim To explore the potential of p16 as a predictive marker for lymph node (LN) metastasis and prognosis in cervical carcinomas.
Methods 145 patients diagnosed with FIGO stage I to IV cervical carcinoma were studied; 95 underwent LN dissection. The expression of p16 protein was studied by immunohistochemistry using tissue microarrays.
Results Overexpression of p16 was seen in 108 of 145 (74.5%) invasive carcinomas. There was a significant correlation between p16 expression and LN metastasis (p=0.007). Patients with p16 overexpression had poorer survival than patients with p16 underexpression (59.3% vs 83.8% 5-year survival rate, log-rank p=0.015). In univariate analysis, p16 expression was a significant predictor of survival (RR 2.76, p=0.02).
Conclusions Results suggest that p16 expression is an important predictive factor of LN metastasis in cervical cancer patients. Moreover, p16 overexpression is associated with a poor prognosis. Therefore, immunohistochemical evaluation of p16 expression is of potential value for treatment planning in cervical carcinomas.
Statistics from Altmetric.com
Funding This study was supported by research grants (SKH-8302-98-DR-23, SKH-8302-99-DR-29) from the Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.
Competing interests None.
Patient consent Obtained.
Ethics approval Ethics approval was provided by the Institutional Review Board of Shin Kong Wu Ho-Su Memorial Hospital.
Provenance and peer review Not commissioned; externally peer reviewed.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.