AIM: To investigate the antiproliferative activity and apoptosis-inducing effects of bufalin on human osteosarcoma cell lines. METHODS: U-2OS and U-2OS methotrexate (MTX) 300-resistant cell lines were treated with bufalin. Cell viability was assessed using the MTT assay. Cell-cycle status, apoptosis-inducing effects, and the expression of apoptosis-related proteins were evaluated by flow cytometry, fluorescent staining, DNA fragmentation assays, and Western blotting. The effect of bufalin on dihydrofolate reductase (DHFR) expression was studied by RTPCR and Western blotting. RESULTS: Bufalin inhibited cell growth in both U-2OS and U-2OS MTX300 cells. The induction of G2/M cell-cycle arrest was also seen in the cells treated with bufalin. The induction of apoptosis by bufalin was confirmed by increased expression of the tumor suppressor protein p53 and the increased ratio of the Bax/Bcl-2 proteins. Bufalin induced apoptosis to the same extent in both cell lines without regard to DHFR levels in the cells. CONCLUSION: Bufalin inhibited the growth of and induced apoptosis in both MTX-sensitive and MTX-resistant human osteosarcoma U-2OS cells. The apoptosis-inducing effect of bufalin was not influenced by the presence of high levels of the DHFR protein.
AIM: To investigate the antiproliferative activity and apoptosis-inducing effects of bufalin on humanosteosarcoma cell lines. METHODS: U-2OS and U-2OS methotrexate (MTX) 300-resistant cell lines were treated with bufalin. Cell viability was assessed using the MTT assay. Cell-cycle status, apoptosis-inducing effects, and the expression of apoptosis-related proteins were evaluated by flow cytometry, fluorescent staining, DNA fragmentation assays, and Western blotting. The effect of bufalin on dihydrofolate reductase (DHFR) expression was studied by RTPCR and Western blotting. RESULTS:Bufalin inhibited cell growth in both U-2OS and U-2OS MTX300 cells. The induction of G2/M cell-cycle arrest was also seen in the cells treated with bufalin. The induction of apoptosis by bufalin was confirmed by increased expression of the tumor suppressor protein p53 and the increased ratio of the Bax/Bcl-2 proteins. Bufalin induced apoptosis to the same extent in both cell lines without regard to DHFR levels in the cells. CONCLUSION:Bufalin inhibited the growth of and induced apoptosis in both MTX-sensitive and MTX-resistant humanosteosarcoma U-2OS cells. The apoptosis-inducing effect of bufalin was not influenced by the presence of high levels of the DHFR protein.
Authors: Jung Hoo Hwang; Soo Jung Park; Won Gyu Ko; Seong-Mun Kang; Da Bin Lee; Junho Bang; Byung-Joo Park; Chung-Beum Wee; Dae Joon Kim; Ik-Soon Jang; Jae-Hong Ko Journal: Am J Cancer Res Date: 2017-03-01 Impact factor: 6.166
Authors: Jung-Hoo Hwang; Jong Cheon Joo; Dae Joon Kim; Eunbi Jo; Hwa-Seung Yoo; Kyung-Bok Lee; Soo Jung Park; Ik-Soon Jang Journal: Am J Cancer Res Date: 2016-08-01 Impact factor: 6.166