Let-7a-5p, miR-100-5p, miR-101-3p, and miR-199a-3p Hyperexpression as Potential Predictive Biomarkers in Early Breast Cancer Patients
Paola Fuso, Mariantonietta Di Salvatore, Cristina Santonocito, Donatella Guarino, Chiara Autilio, Antonino Mulè, Damiano Arciuolo, Antonina Rinninella, Flavio Mignone, Matteo Ramundo, Brunella Di Stefano, Armando Orlandi, Ettore Capoluongo, Nicola Nicolotti, Gianluca Franceschini, Alejandro Martín Sánchez, Giampaolo Tortora, Giovanni Scambia, Carlo Barone, Alessandra Cassano
Abstract
Background: The aim of this study is to identify miRNAs able to predict the outcomes in breast cancer patients after neoadjuvant chemotherapy (NAC). Patients and methods: We retrospectively analyzed 24 patients receiving NAC and not reaching pathologic complete response (pCR). miRNAs were analyzed using an Illumina Next-Generation-Sequencing (NGS) system. Results: Event-free survival (EFS) and overall survival (OS) were significantly higher in patients with up-regulation of let-7a-5p (EFS p = 0.006; OS p = 0.0001), mirR-100-5p (EFS s p = 0.01; OS p = 0.03), miR-101-3p (EFS p = 0.05; OS p = 0.01), and miR-199a-3p (EFS p = 0.02; OS p = 0.01) in post-NAC samples, independently from breast cancer subtypes. At multivariate analysis, only let-7a-5p was significantly associated with EFS (p = 0.009) and OS (p = 0.0008). Conclusion: Up-regulation of the above miRNAs could represent biomarkers in breast cancer.