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- W3028669832 abstract "Objective To learn the effect of different combination model between irradiation and cisplatin or lobaplatin on the radiosensitization of xenographt tumor in mice.Methods Seventy C57BL/6 mice with Lewis lung carcinoma were randomly divided into fourteen groups.Then a single intravenous bolus injection of 10 mg/kg either cisplatin or lobaplatin was given.Tumor tissues were collected at the indicated times of 0.5 h, 2.0 h, 4.0 h, 24.0 h, 48.0 h, 72.0 h, and 96.0 h.The platinum levels were determined by inductively coupled plasma-mass spectrometry.Eighty tumor-bearing mice were randomly divided into 10 groups, including a blank control group, a irradiation group, two drug treatment groups and 6 combined treatment groups.The tumors were irradiated at 1 h, 24 h or 72 h after either cisplatin or lobaplatin injection.The tumor size of the groups was compared.Results The concentrations of cisplatin and lobaplatin in tumors rapidly reached 4.78 μg/g and 2.79 μg/g (t=3.82,P=0.005), respectively, then declined rapidly to 3.39 μg/g and 0.99 μg/g (t=9.10,P=0.000) at 4 h, 1.41 μg/g and 0.23 μg/g (t=3.70,P=0.006) at 96 h, respectively.The tumor growth among the three groups of irradiation at 1 h, 24 h or 72 h after cisplatin was similar, which was slower than the blank control group, the irradiation group and the cisplatin treatment group.At the 15th day, the relative volume of tumor in the three combined treatment groups were 4.73, 5.52 and 2.15(F=0.84,P=0.451), While was 16.63(F=10.50,P=0.000) in the blank control group, 10.34(F=3.12,P=0.046) in the irradiation group, and 12.80(F=8.06,P=0.001) in the cisplatin treatment group, respectively.The tumor growth among the three groups of irradiation at 1 h, 24 h or 72 h after lobaplatin was also similar, which was slower than the blank control group, the irradiation group and the lobaplatin treatment group.At the 15th day, the relative volume of tumor in the three combined treatment groups were 3.49, 4.90 and 3.86(F=0.32,P=0.727), While was 16.63(F=15.21,P=0.000) in the blank control group, 10.34(F=4.12,P=0.016) in the irradiation group, and 14.28(F=10.67,P=0.000) in the lobaplatin treatment group, respectively.The sensitizing enhancement ratio (SER) at 1 h, 24 h and 72 h after the injection were 2.13, 2.03 and 3.45 of cisplatin, and 2.53, 2.00 and 2.50 of lobaplatin, respectively.Conclusions After intravenous bolus injection, the cisplatin concentration in the tumor can be kept at least 96 hours, which results in a persistent radiosensitizing effect.Lobaplatin and cisplatin have similar anti-tumor and radiosensitizing effect.Key words: Lobaplatin; Cisplatin; Radiosensitization; Neoplasm transplantation; Mice" @default.
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- W3028669832 date "2011-07-15" @default.
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- W3028669832 title "The effect of different combinations between irradiation and cisplatin or lobaplatin on tumor growth in mice" @default.
- W3028669832 doi "https://doi.org/10.3760/cma.j.issn.1004-4221.2011.04.026" @default.
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