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Tut TG, Lim SHS, Dissanayake IU, Descallar J, Chua W, Ng W, de Souza P, Shin JS, Lee CS. Upregulated Polo-Like Kinase 1 Expression Correlates with Inferior Survival Outcomes in Rectal Cancer. PLoS One 2015; 10:e0129313. [PMID: 26047016 PMCID: PMC4457812 DOI: 10.1371/journal.pone.0129313] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 05/08/2015] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Human polo-like kinase 1 (PLK1) expression has been associated with inferior outcomes in colorectal cancer. Our aims were to analyse PLK1 in rectal cancer, and its association with clinicopathological variables, overall survival as well as tumour regression to neoadjuvant treatment. METHODS PLK1 expression was quantified with immunohistochemistry in the centre and periphery (invasive front) of rectal cancers, as well as in the involved regional lymph nodes from 286 patients. Scores were based on staining intensity and percentage of positive cells, multiplied to give weighted scores from 1-12, dichotomised into low (0-5) or high (6-12). RESULTS PLK1 scores in the tumour periphery were significantly different to adjacent normal mucosa. Survival analysis revealed that low PLK1 score in the tumour periphery had a hazard ratio of death of 0.59 in multivariate analysis. Other predictors of survival included age, tumour depth, metastatic status, vascular and perineural invasion and adjuvant chemotherapy. There was no statistically significant correlation between PLK1 score and histological tumour regression in the neoadjuvant cohort. CONCLUSION Low PLK1 score was an independent predictor of superior overall survival, adjusting for multiple clinicopathological variables including treatment.
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Affiliation(s)
- T. G. Tut
- School of Medicine, University of Western Sydney, Liverpool, New South Wales 2170, Australia
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
| | - S. H. S. Lim
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- University of New South Wales, Kensington, New South Wales 2052, Australia
- Department of Medical Oncology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - I. U. Dissanayake
- School of Medicine, University of Western Sydney, Liverpool, New South Wales 2170, Australia
- Department of Anatomical Pathology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - J. Descallar
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- University of New South Wales, Kensington, New South Wales 2052, Australia
| | - W. Chua
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- Department of Medical Oncology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - W. Ng
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- Department of Medical Oncology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - P. de Souza
- School of Medicine, University of Western Sydney, Liverpool, New South Wales 2170, Australia
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- University of New South Wales, Kensington, New South Wales 2052, Australia
- Department of Medical Oncology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - J-S. Shin
- School of Medicine, University of Western Sydney, Liverpool, New South Wales 2170, Australia
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- Department of Anatomical Pathology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
| | - C. S. Lee
- School of Medicine, University of Western Sydney, Liverpool, New South Wales 2170, Australia
- Ingham Institute for Applied Medical Research, Liverpool, New South Wales 2170, Australia
- University of New South Wales, Kensington, New South Wales 2052, Australia
- Department of Anatomical Pathology, Liverpool Hospital, Liverpool, New South Wales 2170, Australia
- Bosch Institute, University of Sydney, Camperdown, New South Wales 2006, Australia
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Lim SHS, Shin JS, Tut TG, Ng WT, Chua W, Dissanayake IU, Spring K, Ng W, Bokey L, De Souza P, Lee CS. Polo-like kinase 1 as a biomarker in rectal cancers. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.e14542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | - J-S Shin
- Department of Anatomical Pathology, Liverpool Hospital, Liverpool, Australia
| | - T G Tut
- Liverpool Clinical School, School of Medicine, University of Western Sydney, Liverpool, Australia
| | - W T.W. Ng
- Liverpool Clinical School, School of Medicine, University of Western Sydney, Liverpool, Australia
| | - Wei Chua
- Department of Medical Oncology, Liverpool Hospital, Liverpool, Australia
| | - I U Dissanayake
- Liverpool Clinical School, School of Medicine, University of Western Sydney, Liverpool, Australia
| | - Kevin Spring
- Ingham Institute for Applied Medical Research, Liverpool, Australia
| | - Weng Ng
- Department of Medical Oncology, Liverpool Hospital, Liverpool, Australia
| | - Les Bokey
- Liverpool Clinical School, School of Medicine, University of Western Sydney, Liverpool, Australia
| | - Paul De Souza
- Ingham Institute for Applied Medical Research, Liverpool, Australia
| | - C S Lee
- Department of Anatomical Pathology, Liverpool Hospital, Liverpool, Australia
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