3'-UTR 3'-untranslated region cirmiRNAs circulating miRNAs EVs extracellular vesicles HNSCC head and neck squamous cell carcinoma miRNA microRNA NPAT nuclear protein ataxia-telangiectasia PD-1 programmed cell death 1 RLU luminescence units TNBC triple-negative breast cancer 1 INTRODUCTION As the leading cause of cancer-related death among women, breast cancer is classified into three subtypes based on the expression levels of estrogen, progesterone receptor and HER2 overexpression.1, 2...