1. HOXA4/HOXB3 gene expression signature as a biomarker of recurrence in patients with high-grade serous ovarian cancer following primary cytoreductive surgery and first-line adjuvant chemotherapy
- Author
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Wendell D. Jones, David L. Tait, Jalid Sehouli, Ioana Braicu, Jai N. Patel, Mahrukh K. Ganapathi, Ram N. Ganapathi, Chad A. Livasy, Darla Destephanis, Eric J. Norris, Chad M. Michener, Charles V. Biscotti, James T. Symanowski, Katherine R. Miller, Ashley P. Sutker, and Qing Zhang
- Subjects
0301 basic medicine ,Oncology ,Adult ,medicine.medical_specialty ,HOXA4 ,Organoplatinum Compounds ,Kaplan-Meier Estimate ,Real-Time Polymerase Chain Reaction ,Disease-Free Survival ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Ovarian carcinoma ,Antineoplastic Combined Chemotherapy Protocols ,Biomarkers, Tumor ,Medicine ,Humans ,RNA, Neoplasm ,Aged ,Cisplatin ,Aged, 80 and over ,Homeodomain Proteins ,Ovarian Neoplasms ,Framingham Risk Score ,Base Sequence ,business.industry ,Proportional hazards model ,Obstetrics and Gynecology ,Cytoreduction Surgical Procedures ,Middle Aged ,medicine.disease ,Cystadenocarcinoma, Serous ,Serous fluid ,030104 developmental biology ,Chemotherapy, Adjuvant ,030220 oncology & carcinogenesis ,Cohort ,Female ,Neoplasm Recurrence, Local ,business ,Ovarian cancer ,Transcriptome ,medicine.drug ,Transcription Factors - Abstract
Objectives Aberrant homeobox (HOX) gene expression is reported in high-grade serous ovarian carcinoma (HGSOC), however, its prognostic significance remains unclear. Methods HOX genes associated with progression-free survival (PFS) in a discovery cohort of primary HGSOC samples with RNA sequencing data, and those previously reported to be associated with clinical outcomes, were selected for qPCR testing in an independent training cohort of primary HGSOC samples ( n =71). A prognostic model for PFS was developed using univariate and multivariate Cox regression. Patients were stratified into risk groups that optimized the test statistic. The model was tested in an independent HGSOC cohort from The Cancer Genome Atlas (TCGA) ( n =320). The effect of selected HOX genes on drug sensitivity and reactive oxygen species (ROS) accumulation was examined in vitro. Results Of 23 HOX genes tested in the training cohort, HOXA4 (HR=1.20, 95% CI=1.07–1.34, P =0.002) and HOXB3 (HR=1.09, 95% CI=1.01–1.17, P =0.027) overexpression were significantly associated with shorter PFS in multivariate analysis. Based on the optimal cutoff of the HOXA4/HOXB3 risk score, median PFS was 16.9months (95% CI=14.6–21.2months) and not reached (>80months) for patients with high and low risk scores, respectively (HR=8.89, 95% CI=2.09–37.74, P HOXA4/HOXB3 risk score was significantly associated with disease-free survival (HR=1.44, 95% CI=1.00–2.09, P =0.048). HOXA4 or HOXB3 overexpression in ovarian cancer cells decreased sensitivity to cisplatin and attenuated the generation of cisplatin-induced ROS ( P Conclusions HOXA4/HOXB3 gene expression-based risk score may be useful for prognostic risk stratification and warrants prospective validation in HGSOC patients.
- Published
- 2017