Regulating expressions of cyclin D1,pRb,and anti-cancer effects of deguelin on human Burkitt's lymphoma Daudi cells in vitro  

作　　者：Hong-liLIU YanCHEN Guo-huiCUI Qiu-lingWU JingHE 

机构地区：[1]DepartmentofHematology,UnionHospital,TongjiMedicalCollege,HuazhongUniversityofScienceandTechnology,Wuhan430022,China

出　　处：《Acta Pharmacologica Sinica》2005年第7期873-880,共8页中国药理学报（英文版）

基　　金：the National Natural Science Foundation of China(No 30472267).

摘　　要：Aim:To investigate anticancer effects and molecular mechanism of deguelin on human Burkitt's lymphoma Daudi cells in vitro and compare the cytotoxicities of deguelin on Daudi cells and human peripheral blood monocular cells(PBMC). Methods:The effects of deguelin on the growth of Daudi cells were studied by 3- (4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium(MTT)assay.Apoptosis were dectected through Hoechst 33258 staining and Annexin V/PI double-labeled cytometry.The effect of deguelin on the cell cycle of Daudi cells were studied by a propidium iodide method.The expressions of cyclin D 1 and pRb were checked by Western blot.Results:The proliferation of Daudi cells were decreased in deguelin-treated group with a 24-h IC_(50)value of 51.55 nmol/L.Deguelin induced Daudi cells apoptosis was in a time-and dose-dependent manner.G_0/G_1 phase increased and S phase decreased in Daudi cells treated with deguelin.With deguelin 0,5,10,20,and 40 nmol/L treatment for 24 h,G_0/G_1 phase increased from 37.34% to 56.56%,whereas S phase decreased from 37.72% to 21.36%.PBMC was less sensitive to the cytotoxic effect of deguelin than Daudi cells.The expression of cyclin D 1 and pRb protein were decreased sharply in Daudi cells treated with deguelin.Conclusion:Deguelin is able to inhibit the proliferation of Daudi cells by regulating the cell cycle that arrested cells at G_0/G_1 phase and inducing the cell apoptosis.Moreover,deguelin selectively induced apoptosis of Daudi cells with low toxicity in PBMC.The antitumor effects of deguelin were related to down- regulating the expression of cyclin D1 and pRb protein.Aim:To investigate anticancer effects and molecular mechanism of deguelin on human Burkitt's lymphoma Daudi cells in vitro and compare the cytotoxicities of deguelin on Daudi cells and human peripheral blood monocular cells(PBMC). Methods:The effects of deguelin on the growth of Daudi cells were studied by 3- (4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium(MTT)assay.Apoptosis were dectected through Hoechst 33258 staining and Annexin V/PI double-labeled cytometry.The effect of deguelin on the cell cycle of Daudi cells were studied by a propidium iodide method.The expressions of cyclin D 1 and pRb were checked by Western blot.Results:The proliferation of Daudi cells were decreased in deguelin-treated group with a 24-h IC_(50)value of 51.55 nmol/L.Deguelin induced Daudi cells apoptosis was in a time-and dose-dependent manner.G_0/G_1 phase increased and S phase decreased in Daudi cells treated with deguelin.With deguelin 0,5,10,20,and 40 nmol/L treatment for 24 h,G_0/G_1 phase increased from 37.34% to 56.56%,whereas S phase decreased from 37.72% to 21.36%.PBMC was less sensitive to the cytotoxic effect of deguelin than Daudi cells.The expression of cyclin D 1 and pRb protein were decreased sharply in Daudi cells treated with deguelin.Conclusion:Deguelin is able to inhibit the proliferation of Daudi cells by regulating the cell cycle that arrested cells at G_0/G_1 phase and inducing the cell apoptosis.Moreover,deguelin selectively induced apoptosis of Daudi cells with low toxicity in PBMC.The antitumor effects of deguelin were related to down- regulating the expression of cyclin D1 and pRb protein.

关 键 词：DEGUELIN Daudi cells cyclin D1 PRB apoptosis 

分 类 号：R733.4[医药卫生—肿瘤] R979.1[医药卫生—临床医学]