The novel circRNA circ_0045881 inhibits cell proliferation and invasion by targeting mir214-3p in triple-negative breast cancer

Triple-negative breast cancer (TNBC) is the most lethal subtype of breast cancer (BC). The circRNAmiRNA‒mRNA axis is a promising biomarker for the early diagnosis and prognosis of BC. However, the critical circRNA mediators involved in TNBC progression and the underlying regulatory mechanism involved remain largely unclear.