It is first demonstrated that dipyridamole (DP) and radiation were capable of significantly inhibiting, independently and synerglcally, clonogenlc growth in the two kinds of K562 cell lines, adriamycin (ADM) -sensitiv...It is first demonstrated that dipyridamole (DP) and radiation were capable of significantly inhibiting, independently and synerglcally, clonogenlc growth in the two kinds of K562 cell lines, adriamycin (ADM) -sensitive and ADM- resistant. DP or radiation alone Increased clonogenlc Inhibition rate (CIR) in the two kinds of cell lines in a dose- dependent fashion. DP potentiated radiosensitivity and radiation increased inhibition of DP in the two kinds of cell lines. K562/ ADM cell lines were higher sensitive to DP. radiation and combination of them than K562 cell lines (P<0. 01). There was stronger synergic inhibition of clonogenlc growth in the two kinds of cell lines when pretreated with DP than when posttreated with DP (P<0. 01).展开更多
It was first reported here that verupamil(VP) and electric beam radiation(EBR) were capable of inhibiting,independently or synergically,clonogenic growth in two kinds of K562 cell lines, adriamycin(ADM)-sensitive and ...It was first reported here that verupamil(VP) and electric beam radiation(EBR) were capable of inhibiting,independently or synergically,clonogenic growth in two kinds of K562 cell lines, adriamycin(ADM)-sensitive and ADM-resistant(K562/S and K562/ADM).Results showed that clonogenic rate(CGR) decreased by 3%-99.9% in the prasence of dependent dose-ADM(3.8μg/ml) in K562/ADM cell lines,while treated with 0.5μM-6μM of VP.VP was capable of potentiating radiosensitivity in K562/S and K562/ADM cell lines,whether before or after exposure of them to electric beam radiation,and significantly reduced CGR in these kinds of cell lines(P<0.01).展开更多
目的探讨雷公藤内酯醇(TP)对DU145/ADM细胞阿霉素敏感性及逆转耐药的影响。方法采用MTT法检测TP预处理DU145/ADM细胞对阿霉素敏感性的影响,采用RT-PCR和Western blot分别检测相关基因转录水平与蛋白水平的变化。结果不同浓度TP(20、40、...目的探讨雷公藤内酯醇(TP)对DU145/ADM细胞阿霉素敏感性及逆转耐药的影响。方法采用MTT法检测TP预处理DU145/ADM细胞对阿霉素敏感性的影响,采用RT-PCR和Western blot分别检测相关基因转录水平与蛋白水平的变化。结果不同浓度TP(20、40、80 ng mL-1)预处理DU145/ADM细胞72 h后,均可使细胞对不同浓度阿霉素(10、20、30、40、50 ng mL-1)敏感性较TP预处理前明显增加,mdr1表达较TP预处理前明显下降,并呈剂量相关性。结论 TP通过下调mdr1表达增强DU145/ADM细胞对阿霉素的敏感性,其有可能成为一种耐药逆转剂。展开更多
文摘It is first demonstrated that dipyridamole (DP) and radiation were capable of significantly inhibiting, independently and synerglcally, clonogenlc growth in the two kinds of K562 cell lines, adriamycin (ADM) -sensitive and ADM- resistant. DP or radiation alone Increased clonogenlc Inhibition rate (CIR) in the two kinds of cell lines in a dose- dependent fashion. DP potentiated radiosensitivity and radiation increased inhibition of DP in the two kinds of cell lines. K562/ ADM cell lines were higher sensitive to DP. radiation and combination of them than K562 cell lines (P<0. 01). There was stronger synergic inhibition of clonogenlc growth in the two kinds of cell lines when pretreated with DP than when posttreated with DP (P<0. 01).
文摘It was first reported here that verupamil(VP) and electric beam radiation(EBR) were capable of inhibiting,independently or synergically,clonogenic growth in two kinds of K562 cell lines, adriamycin(ADM)-sensitive and ADM-resistant(K562/S and K562/ADM).Results showed that clonogenic rate(CGR) decreased by 3%-99.9% in the prasence of dependent dose-ADM(3.8μg/ml) in K562/ADM cell lines,while treated with 0.5μM-6μM of VP.VP was capable of potentiating radiosensitivity in K562/S and K562/ADM cell lines,whether before or after exposure of them to electric beam radiation,and significantly reduced CGR in these kinds of cell lines(P<0.01).
文摘目的探讨雷公藤内酯醇(TP)对DU145/ADM细胞阿霉素敏感性及逆转耐药的影响。方法采用MTT法检测TP预处理DU145/ADM细胞对阿霉素敏感性的影响,采用RT-PCR和Western blot分别检测相关基因转录水平与蛋白水平的变化。结果不同浓度TP(20、40、80 ng mL-1)预处理DU145/ADM细胞72 h后,均可使细胞对不同浓度阿霉素(10、20、30、40、50 ng mL-1)敏感性较TP预处理前明显增加,mdr1表达较TP预处理前明显下降,并呈剂量相关性。结论 TP通过下调mdr1表达增强DU145/ADM细胞对阿霉素的敏感性,其有可能成为一种耐药逆转剂。
