A five-variable signature predicts radioresistance and prognosis in nasopharyngeal carcinoma patients receiving radical radiotherapy.
Radioresistance poses a major challenge in nasopharyngeal carcinoma (NPC) treatment. Clinical tumor-node-metastasis (TNM) staging has limited accuracy in predicting NPC radioresponse and determining its therapeutic regimens. To construct a risk score model for predicting NPC radioresistance, immunohistochemistry was used to assess the expression of four proteins (14-3-3σ, Maspin, RKIP, and GRP78) in 149 NPC samples with different radiosensitivity. Sequentially, a logistic regression analysis was performed to identify independent predictors of NPC radioresistance and establish a risk score model. As a result, a risk score model, Z = -3.189 - 1.478 (14-3-3σ) - 1.082 (Maspin) - 1.666 (RKIP) + 2.499 (GRP78) + 2.597 (TNM stage), was constructed, and a patient's risk score was estimated by the formula: e (Z)/(e (Z) + 1) × 100, where "e" is the base of natural logarithm. High-risk score was closely associated with NPC radioresistance, and was observed more frequently in the radioresistant patients than that in the radiosensitive patients. The sensitivity, specificity, and accuracy of the risk score model for predicting NPC radioresistance was 88.00, 86.48, and 87.25 %, respectively, which was clearly superior to each individual protein and TNM stage. Furthermore, Kaplan-Meier survival analysis showed that high-risk score correlated with the markedly reduced overall survival (OS) and disease-free survival (DFS) of the patients, and Cox regression analysis showed that the risk score model was an independent predictor for OS and DFS. This study constructs a risk score model for predicting NPC radioresistance and patient survival, and it may serve as a complement to current radioresistance risk stratification approaches.
['Yi|Hong-Mei|HM|', 'Yi|Hong|H|', 'Zhu|Jin-Feng|JF|', 'Xiao|Ta|T|', 'Lu|Shan-Shan|SS|', 'Guan|Yong-Jun|YJ|', 'Xiao|Zhi-Qiang|ZQ|']
D048948:14-3-3 Proteins D000328:Adult D000368:Aged D014408:Biomarkers, Tumor D002277:Carcinoma D000091342:Endoplasmic Reticulum Chaperone BiP D005095:Exoribonucleases D005260:Female D006360:Heat-Shock Proteins D006801:Humans D007150:Immunohistochemistry D016015:Logistic Models D008297:Male D008875:Middle Aged D000077274:Nasopharyngeal Carcinoma D009303:Nasopharyngeal Neoplasms D009367:Neoplasm Staging D049488:Phosphatidylethanolamine Binding Protein D011379:Prognosis D011836:Radiation Tolerance D015843:Serpins
Radioresistance Nasopharyngeal carcinoma Risk score model TNM stage Biomarkers