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秋水仙碱抑制G422胶质瘤生长的实验研究
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摘要
目的:探讨运用MTT法测定秋水仙碱在体外是否具有抑制G422胶质瘤细胞生长增殖的作用;通过建立小鼠皮下胶质瘤模型,采用间质内注射不同剂量的秋水仙碱,观察是否能延长各实验组小鼠的生存周期和延缓肿瘤的生长。
     方法:实验一设定6个秋水仙碱检测浓度,分别为0.03ug/mL、0.06ug/mL、0.12ug/mL、0.25ug/mL、0.5ug/mL、1ug/mL。采用MTT法测定经小鼠体内传代的G422胶质瘤细胞标本对以上6种不同浓度秋水仙碱的体外敏感性。
     实验二建立小鼠皮下胶质瘤模型,将接种G422的小鼠随机分成4组,其中3组按秋水仙碱0.5、0.05、0.005mg/kg·d分为高、中、低实验组,另1组为生理盐水对照组,各组20只小鼠,分于接种G422后的第2d(即48h)、5d在原接种G422的局部皮下注射0.1ml药物,共2次。
     结果:1.MTT法实验结果显示:不同浓度的秋水仙碱对G422胶质瘤细胞株的生长均有一定的抑制作用,其抑制率分别是0.03ug/mL组(36.41±4.16)%、0.06ug/mL组(51.33±5.30)%、0.12ug/mL组(65.47±2.77)%、0.25ug/mL组(70.54±2.42)%、0.5ug/mL组(75.38±1.10)%、1ug/mL组(77.37±2.25)%。随着药物浓度增大,瘤细胞生长抑制率呈增高的趋势。
     2.皮下间质内化疗结果显示:秋水仙碱治疗组平均生存期均有延长,分别为44.28±1.07、43.79±1.64、43.09±1.39天;对照组的平均生存期为28.28±1.77天。多个样本均数的比较经方差分析,P<0.01,各实验组荷瘤鼠生存期不同或不全相同。
     结论:1.秋水仙碱在体外具有抑制G422胶质瘤细胞生长的作用,在0.03~1ug/mL浓度范围内,瘤细胞的生长抑制率随药物浓度的增大而增高。
     2.秋水仙碱间质内化疗可以显着提高G422荷瘤鼠的生存周期和延缓肿瘤的生长。
     3.秋水仙碱有可能成为一种新的抗胶质瘤的化疗药物。
Objective To evaluate the sensitivity of colchicine to the G422 glioma cell in vitro with colorimetric MTT assay.To inject different dosage of colchicine into mice with the G422 glioma and to observe whether this can prolong mice's life periods.
     Methods Experiment one:In vitro,sensitivities of 6 different concentrations of colchicine were determined by MTT method in G422 glioma which spread generation in the small mice body,which 6 kinds of concentration respectively are 0.03ug/mL、0.06ug/mL、0.12ug/mL、0.25ug/mL、0.5ug/mL、1ug/mL.The G422 glioma cells were plated in 96-well tissue culture plates and incubated for 48h with colchicine. Experiment two:To establish 80 mices subcutaneous glioma model,these will be inoculated with G422 glioma were randomly divided into 4 groups.According to colchicine 0.5、0.05、0.005 mg/kg·d,3 groups of 4 are divided into high、medium and low experimental group,and the other one group is the saline control group.20 mices in each group,sub-in after G422 inoculation 2d(equivalent to 48h)、5d,will be injected 0.1ml of drugs at the original inoculation G422 subcutaneous,a total of 2 times.
     Results 1.The growth of the G422 glioma cell can be restrained by 6 different concentrations of colchicine,and its inhibition rate are separately 0.03ug/ml Group (36.41±4.16)%,0.06ug/ml Group(51.33±5.30)%,0.12ug/ml Group(65.47±2.77)%,0.25ug/ml Group(70.54±2.42)%,0.5ug/ml Group(75.38±1.10)%,1ug/ml Group(77.37±2.25)%.The rate of restraining growth of tumour cell increased with the concentrations of medicine.2.By colchicine treatment,tumor-bearing mices have extended and the average survival time were 44.28±1.07,43.79±1.64,43.09±1.39 days;the control group the average survival time was 28.28±1.77 days.More than the number of samples are compared by analysis of variance,P<0.01.
     Conclusions 1.The growth of the G422 glioma cell in vitro can be restrained by colchicine.In the 0.03-1ug/mL density scope,the growth suppression rate of the G422 glioma cell increases along with the medicine density advances.
     2.Chemotherapy of colchicine can significantly improve tumor-bearing with G422 mice's survival time and postpone tumor growth..
     3.The colchicine has the possibility to become one kind of new chemotherapy medicine to anti-glioma.
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