Abstract
Objective
The purpose of this study was to evaluate microvessel density (MVD) as assessed by C-type lectin 14A (CLEC14A), which is a new marker for endothelial cells, and compare its expression to CD31 and CD105 in epithelial ovarian cancer (EOC).
Methods
MVD was evaluated in tumors (n = 50) from patients with EOC who underwent primary surgery and in patients with EOC who received preoperative chemotherapy (n = 49) using immunohistochemistry with antibodies to CLEC14A, CD31 and CD105. The median duration of follow-up was 24.5 months (range 1−101 months). The effect of prognostic factors on event-free survival (EFS) and overall survival (OS) was assessed using the Cox regression model.
Results
The amount of residual disease was found to be an independent prognostic factor in multivariate analysis with respect to EFS (P = 0.009) and OS (P < 0.001). The mean MVD of CLEC14A (MVD = 6), in tumors from patients who underwent primary surgery, was significantly lower than that of CD31 (MVD = 25, P < 0.0001) and CD105 (MVD = 11, P = 0.018). However, there was no significant correlation between MVD as detected by these markers and clinical outcome. There was no expression of CLEC14A in tumors from patients who received preoperative chemotherapy and the MVD of CD31 and CD105 was significantly reduced (P = 0.001 and 0.006, respectively) in this set of patients.
Conclusion
This study demonstrates MVD as detected by CLEC14A in EOC. Treatment with chemotherapy reduces tumor blood vessels significantly. We suggest that CLEC14A may be a more specific endothelial marker to assess tumor angiogenesis.
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Acknowledgments
We thank the Board of Research in Nuclear Sciences (BRNS) and the Department of Biotechnology, Government of India for the funding. We are grateful to the faculty and technical staff in the department of histopathology, Amrita Institute of Medical Sciences (AIMS) for their help. We thank Dr. S. Shirley and Dr. Kanchan Murhekar, Cancer Institute (WIA) for their timely suggestions. We acknowledge the assistance of Dr. K. R. Sundaram and Ms. Amrutha Jose, Department of Biostatistics, AIMS, Cochin and Dr. Swaminathan and Dr. Rama, Tumour Registry, Cancer Institute (WIA), Chennai for statistical analysis.
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This study was funded by the Board of Research in Nuclear Sciences and Department of Biotechnology, Government of India. Ms.S.Krishna Priya and Mr.Rohit P Nagare are recipients of a Senior Research Fellowship from the Indian Council for Medical Research (ICMR), Government of India.
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Krishna Priya, S., Kumar, K., Hiran, K.R. et al. Expression of a novel endothelial marker, C-type lectin 14A, in epithelial ovarian cancer and its prognostic significance. Int J Clin Oncol 22, 107–117 (2017). https://doi.org/10.1007/s10147-016-1033-6
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DOI: https://doi.org/10.1007/s10147-016-1033-6