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BW18, a C-21 steroidal glycoside, exerts an excellent anti-leukemia activity through inducing S phase cell cycle arrest and apoptosis via MAPK pathway in K562 cells.
Biomedicine & Pharmacotherapy 2019 Februrary 20
C-21 steroids displayed the activities of immunosuppressive, anti-inflammatory and anti-virus effects by the reports. However, its antitumor effects and molecular mechanism remain unclear. We previously isolated and identified a C-21 steroidal glycoside (BW18) from the root of Cynanchum atratum Bunge. This study was aimed to assess anti-leukemia activity and its underlying mechanism in K562 cells. MTT assay results showed that BW18 inhibited cell viability and proliferation of K562 cells. We also found that BW18 could induce S phase cell cycle arrest and apoptosis. Furthermore, our results demonstrated that BW18 regulated the expression of apoptosis and cell cycle related proteins. Mechanism investigation revealed that the anti-leukemia activity of BW18 may be mediated through MAPK pathway. These findings indicate that BW18 possesses an excellent anti-leukemia activity via regulating MAPK pathway leading to S phase cell cycle arrest and apoptosis, which suggested BW18 could be as a potential alternative therapeutic agent for CML patients.
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