ABCB1 and ovarian cancer: Among these mechanisms, the release of various chemotherapeutic drugs using adenosine triphosphate-binding cassette (ABC) transporters, such as ABCB1 (multidrug resistance protein 1 or P-glycoprotein) and ABCG2 (breast cancer resistance protein), which are adenosine triphosphate (ATP)-dependent drug efflux membrane proteins, is the most common mechanism for developing drug resistance in the ovarian cancer cells [7,8].