Identification of Receptor Tyrosine Kinase, Discoidin Domain Receptor 1 (DDR1), as a Potential Biomarker for Serous Ovarian Cancer

International Journal of Molecular Sciences

Jinhua Quan¹  Tetsuro Yahata²  Sosuke Adachi¹  Kosuke Yoshihara¹ 

[1] Division of Obstetrics and Gynecology, Niigata University, Graduate School of Medical and Dental Sciences, Niigata, 951-8520, Japan;

关键词: ovarian cancer;    tyrosine kinase;    DDR1;    disease biomarker;    cDNA subtraction;    degenerate PCR;   

DOI  :  10.3390/ijms12020971

来源: mdpi

【 摘 要 】

Ovarian cancer, one of the most common gynecological malignancies, has an aggressive phenotype. It is necessary to develop novel and more effective treatment strategies against advanced disease. Protein tyrosine kinases (PTKs) play an important role in the signal transduction pathways involved in tumorigenesis, and represent potential targets for anticancer therapies. In this study, we performed cDNA subtraction following polymerase chain reaction (PCR) using degenerate oligonucleotide primers to identify specifically overexpressed PTKs in ovarian cancer. Three PTKs, janus kinase 1, insulin-like growth factor 1 receptor, and discoidin domain receptor 1 (DDR1), were identified and only DDR1 was overexpressed in all ovarian cancer tissues examined for the validation by quantitative real-time PCR. The DDR1 protein was expressed in 63% (42/67) of serous ovarian cancer tissue, whereas it was undetectable in normal ovarian surface epithelium. DDR1 was expressed significantly more frequently in high-grade (79%) and advanced stage (77%) tumors compared to low-grade (50%) and early stage (43%) tumors. The expression of the DDR1 protein significantly correlated with poor disease-free survival. Although its functional role and clinical utility remain to be examined in future studies, our results suggest that the expression of DDR1 may serve as both a potential biomarker and a molecular target for advanced ovarian cancer.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.