“…This poor prognosis is mainly due to MDR in gastric cancer cells. Many strategies have been developed to overcome MDR in cancer, including modification of chemotherapy regimens (Dong and Mumper, 2010), inactivation o MDR-associated genes (Kruhn et al, 2009;Stege et al, 2010), use of monoclonal antibodies for MDR1 (Goda et al, 2007), new inhibitors of ABC transporters (Dong and Mumper, 2010) and so on. However, there are numerous challenges for these strategies.…”