机构地区:[1]广州医学院附属广州市第一人民医院胃肠外科,510180
出 处:《中华实验外科杂志》2012年第12期2484-2487,共4页Chinese Journal of Experimental Surgery
基 金:广东省科技计划资助项目(20108060900016);广州市医药卫生科技重点资助项目(2009.ZDi-01)
摘 要:目的观察不同光照剂量、不同浓度光敏剂酞菁锌光动力作用对人结肠癌SW480细胞增殖和凋亡的影响。方法用4种不同光照剂量(0、1、5、10J/cm2)分别辐射与6种不同浓度(0、0.125、0.250、0.500、1.000、2.000mg/L)光敏剂酞菁锌行体外培养的SW480细胞,应用细胞计数试剂盒(CCK-8)方法评估光动力作用后SW480细胞的存活率,流式细胞仪检测细胞周期分布,免疫组织化学检测bax、B淋巴细胞/白血病-2(bcl-2)表达的变化。结果不同酞菁锌(0.000、0.125、0.250、0.500、1.000、2.000mg/L)经不同光照剂量(0、1、5、10J/cm2)作用SW480细胞后其细胞抑制率分别是:(0.99±0.02)%、(1.00±0.02)%、(1.01±0.05)%、(1.01±0.01)%、(1.04±0.03)%、(1.08±0.05)%;(0.54±0.05)%、(0.65±0.07)%、(0.70±0.04)%、(0.76±0.09)%、(0.86±0.02)%、(0.91±0.04)%;(0.28±0.01)%、(0.45±0.05)%、(0.60±0.02)%、(0.81±0.04)%、(0.91±0.07)%、(0.92±0.06)%和(0.18±0.01)%、(0.35±0.09)%、(0.43±0.03)%、(0.75±0.04)%、(0.87±0.05)%、(0.92±0.05)%;其效应呈浓度和光照剂量依赖性。光照剂量恒定为5J/era。,照射10rain:流式细胞仪分析显示SW480细胞呈G2/M期阻滞;SW480细胞的凋亡率分别为:(0.17±0.09)%、(0.19±0.08)%、(3.25±0.29)%、(7.38±1.01)%、(14.97±1.03)%、(18.25±1.23)%。用2mg/L酞菁锌的完全培养液,光照剂量恒定为5J/cm2,照射10rain处理SW480细胞株,bax蛋白表达与对照组比较差异无统计学意义(P〉0.05),bel-2蛋白表达自光动力作用后6h起显著下降(P〈0.01);光动力作用6h后bax/bcl-2比值依次递增,差异有统计学意义�Objective To investigate the influence of light dose and concentration of zinc phthalo- cyanine on the proliferation and apoptosis in vitro of SW480 ceils. Methods Four different light doses with six different concentrations of photosensitizer were used to kill SW480 cells, respectively. Cell counting kit-8 (CCK-8) assay was used to test the changes in the proliferation of SW480 ceils cultured with different con- centrations 'of zinc phthalocyanine and different light doses in vitro. Cell-cycle kinetics and apoptosis were analyzed by flow cytometry (FCM). The expression of bax and bcl-2 proteins was detected for photodynam- ic therapy (PDT) by using immunocytochemistry. Results Growth inhibition rate of four different light do- ses with six different concentrations of photosensitizer was (0. 99 ±.02) % , ( 1.00 ±0. 02) % , ( 1.01 ± 0.05)%, (1.01 ±.01)%, (1.04±.03)%, (1.08 ±.05)%; (0.54_0.05)%, (0.65 ±0.07)%, (0.70 ±0.04)%, (0.76 ±0.09)%, (0.86 ±.02)%, (0.91 ±.04)%; (0.28 ± 0.01)%, (0.45 ±0.05)%, (0.60 ±0.02)%, (0.81 ±.04)%, (0.91 ±0.07)%, (0.92 ±0.06)% and (0.18±.01)%, (0.35 ±0.09)%, (0.43±0.03)%, (0.75 ±0.04)%, (0.87± 0. 05 ) %, (0. 92 ±0. 05 ) % , respectively. The proliferation of SW480 cells was obviously suppressed by zinc phthalocyanine-mediated photodynamic therapy in a concentration and light dose-dependent manner. Under the conditions of light dose constant 5 J/cm2, and 10 min, the cells were arrested in Gz/M phase and apoptosis was induced. When SW480 cells were treated with zinc phthalocyanine at the concentration of O. 000, 0. 125, 0. 250, 0. 500, 1. 000, and 2. 000 mg/L, the apoptosis rate of SW480 cells was (0.17±0.09)%, (0.19±0.08)%, (3.25 ±0.29)%, (7.38±1.01)%, (14.97 ±1.03)% and ( 18.25 ± 1.23)% respectively. After SW480 cells were treated with 0, 2. 0 mg/L zinc phthalocyanine re- spectively, there was no significant difference in the p
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