MDR is characterized by a combination of mechanisms including, P-glycoprotein (P-gp) [20], multidrug-resistance-associated protein 1 (MRP1) and breast cancer resistance protein (BCRP) of the ATP-binding cassette (ABC) membrane transporter family, which efflux a diverse range of anticancer drugs from the tumour cells [23,24]. Here, ABCG2 is linked to neoplasm.