CAV1 and neoplasm: Apart from enhancing β1,6-branching in complex and hybrid N-glycans [57], caveolin-1 also up-regulates α-2,6-sialyltransferase I (ST6Gal-I) expression and then promotes the α2,6-sialylation of integrin, thus increasing tumor cell adhesion to extracellular matrix (ECM) [88,92].