Document Type
Article
Publication Date
12-5-2014
Abstract
BACKGROUND: Early detection of ovarian cancer remains a challenge due to widespread metastases and a lack of biomarkers for early-stage disease. This study was conducted to identify relevant biomarkers for both laparoscopic and serum diagnostics in ovarian cancer.
METHODS: Bioinformatics analysis and expression screening in ovarian cancer cell lines were employed. Selected biomarkers were further validated in bio-specimens of diverse cancer types and ovarian cancer subtypes. For non-invasive detection, biomarker proteins were evaluated in serum samples from ovarian cancer patients.
RESULTS: Two kallikrein (KLK) serine protease family members (KLK6 and KLK7) were found to be significantly overexpressed relative to normal controls in most of the ovarian cancer cell lines examined. Overexpression of KLK6 and KLK7 mRNA was specific to ovarian cancer, in particular to serous and papillary serous subtypes. In situ hybridization and histopathology further confirmed significantly elevated levels of KLK6 and KLK7 mRNA and proteins in tissue epithelium and a lack of expression in neighboring stroma. Lastly, KLK6 and KLK7 protein levels were significantly elevated in serum samples from serous and papillary serous subtypes in the early stages of ovarian cancer, and therefore could potentially decrease the high "false negative" rates found in the same patients with the common ovarian cancer biomarkers human epididymis protein 4 (HE4) and cancer antigen 125 (CA-125).
CONCLUSION: KLK6 and KLK7 mRNA and protein overexpression is directly associated with early-stage ovarian tumors and can be measured in patient tissue and serum samples. Assays based on KLK6 and KLK7 expression may provide specific and sensitive information for early detection of ovarian cancer.
Recommended Citation
Tamir, Ayala; Jag, Ushma; Sarojini, Sreeja; Schindewolf, Craig; Tanaka, Takemi; Gharbaran, Rajendra; Patel, Hiren; Sood, Anil; Hu, Wei; Patwa, Ruzeen; Blake, Patrick; Chirina, Polina; Oh Jeong, Jin; Lim, Heejin; Goy, Andre; Pecora, Andrew; and Suh, K Stephen, "Kallikrein family proteases KLK6 and KLK7 are potential early detection and diagnostic biomarkers for serous and papillary serous ovarian cancer subtypes." (2014). Department of Medicine Faculty Papers. Paper 161.
https://jdc.jefferson.edu/medfp/161
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
PubMed ID
25477184
Comments
This article has been peer reviewed. It was published in: Journal of ovarian research.
Volume 7, 2014, Page 109.
The published version is available at DOI: 10.1186/s13048-014-0109-z
Copyright © Tamir et al.; licensee BioMed Central Ltd. 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.