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Inhibition of tanshinone ⅡA on lung cancer cell proliferation |
WANG Jiangfeng1, YANG Shiyu2, LI Jianqiang1, CHEN Sheng1
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1. Department of Thoracic Surgery, Cancer Hospital Affiliated to University of Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China; 2. Hangzhou Medical College, Hangzhou, Zhejiang 310059, China |
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Abstract Objective To investigate the inhibition of tanshinoneⅡA (TanⅡA) on the proliferation of lung cancer cells. Methods Human lung cancer cell lines A549, SK-MES-1, H446 and H460 were cultured in vitro and treated with TanⅡA at concentrations of 0.3, 0.6, 1.3, 2.5, 5.0, 10.0 mg/mL, while untreated cells served as controls. Cell proliferation was measured by using CCK-8 assay, and apoptosis was measured using flow cytometry, while the expression of apoptosis-related proteins was determined using Western blotting. The apoptotic rate of lung cancer cells was compared between Tan ⅡA-treated cells and untreated cells. Results Tan ⅡA inhibited lung cancer cell proliferation in a time-dependent and concentration-dependent manner, and the survival rates of A549, SK-MS-1, H446 and H460 cells reduced with the concentration of TanⅡA (t=4.503, 2.114, 2.103 and 3.567; all P<0.05) and the duration of TanⅡA treatment (t=5.189, 3.079, 3.023 and 3.845; all P<0.05). The 48 h half maximal inhibitory concentrations (IC50 values) of TanⅡA were (1.18±0.12), (0.78±0.08), (1.55±0.16) and (1.27±0.14) mg/mL against A549, SK-MES-1, H446 and H460 cells, respectively. Following 48 h treatment with Tan ⅡA at a concentration of 2.5 mg/mL, the apoptotic rates of A549, SK-MS-1, H446 and H460 cells were (34.97±3.78)%, (37.62±2.48)%, (18.27±2.98)% and (19.17±2.30)%, which were significantly significantly higher than those of untreated cells [(4.86±0.36) %, (3.21±0.48) %, (3.25±0.26)% and (2.66±0.19)%, all P<0.05]. Reduced Akt1 protein expression, elevated Bax/Bcl-2 expression ratio, and elevated caspase-9 and caspase-3 protein expression were detected in lung cancer cells treated with 2.5 mg/mL TanⅡA for 48 h relative to untreated cells. Conclusion TanⅡA may inhibit lung cancer cell proliferation in a time- and concentration-dependent manner via the Bax/Bcl-2/caspase-9/caspase-3 pathway.
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Received: 30 April 2022
Revised: 21 July 2022
Published: 08 September 2022
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