CA9 and breast cancer: EMT also seems to be linked with the function of miR-205-5p (Braicu et al. 2019), while miR-210-3p seems to inhibit the tumor growth and metastasis of BC via targeting fibroblast growth factor receptor-like 1 (Yang et al. 2017) and is also strongly associated with markers of tumor hypoxia like HIF-1α, CA9, Glut-1 protein (Irlam-Jones et al. 2016).