The Experimental and Clinical Study on the Effect of Curcumin on Cell Cycle Proteins and Regulating Proteins of Apoptosis in Acute Myelogenous Leukemia

To investigate whether the Bcl- 2 gene family is involved in m odulating mechanism of apoptosis and change of cell cycle protein induced by curcumin in acute myeloid leukemia HL - 6 0 cell line and primary acute m yelogenous leukem ic cells,the Bcl- 2 family member Mcl- 1,Bax and Bak and cell cycle proteins including P2 7kipl,P2 1wafl,cyclin D3and p Rbp- were selected and their ex- pression detected by SABC imm uno- histochem ical stain m ethod.The attitude of sub- G1 peak in DNA histogram was determined by FCM.The TU NEL positive cell percentage was identified by term inal deoxynucleotidyl transferase (Td T ) - m ediated Biotin d U NP end labeling technique.It was found that when HL - 6 0 cells were treated with 2 5μm ol/ L curcumin for 2 4 h,the expression level of Mcl- 1was down- regulated,but that of Bax and Bak up- regulated time- dependently.There was significant difference in the expression level of Mcl- 1,Bax and Bak between the curcumin- treated groups and control group(P<0 .0 5 - 0 .0 1) .At the sam e time,curcumin had no effect on progress of cell cycle in prim aty acute m yelogenous leukemia at newly diagnosis,but could in- crease the peak of Sub- G1 (P<0 .0 5 ) ,and down- regulate the expression of Mcl- 1and up- regulate the expression of Bax and Bak with the difference being statistically significant.The expression of P2 7kipl,P2 1wafl and p Rbp- were elevated and thatof cyclin D3decreased in the presence of curcum in. These findings suggested thatthe Bcl- 2 gene fam ily indeed participated in the regulatory process of apoptosis induced by curcumin in HL - 6 0 cells and AML cells.Curcumin can induce apoptosis of primary acute myelogenous leukemic cells and disturb cell cycle progression of HL - 6 0 cells.The m echanism appeared to be m ediated by perturbing G0 / G1 phases checkpoints which associated with up- regulation of P2 7kipl,P2 1wafl and p Rbp- expression,and down- regulation of cyclin D3.

HPLC法同时测定防风中6个主要成分的含量

目的:建立HPLC-DAD法同时测定中药防风中升麻苷、升麻素、5-O-甲基维斯阿米醇苷、印枳树皮苷、防风灵和亥茅酚苷6个主要有效成分的含量。方法:采用正交设计优化提取方法,以提取时间、方法、次数、溶剂比为主要影响因素,以6个分析物的总量为评价指标;分析物的色谱分离用Dikma DiamonsilTMC18色谱柱(250 mm×4.6 mm,5μm)、Dikma Easy Guard C18保护柱(20 mm×4.6 mm,5μm),以甲醇-水为流动相,梯度洗脱,流速为1.0 mL·min-1,检测波长为254 nm,柱温为25℃。结果:确定最佳提取方法为甲醇30倍量回流提取2次,每次2 h。6个分析物的线性范围分别为:升麻苷50～1000 mg·L-1(r=0.9999),升麻素10～200 mg·L-1(r=0.9999),5-O-甲基维斯阿米醇苷20～500 mg·L-1(r=0.9999),印枳树皮苷5～100mg·L-1(r=0.9995),防风灵5～100 mg·L-1(r=0.9991),亥茅酚苷10～200 mg·L-1(r=0.9995);平均加样回收率(n=3)均在95.6%～106.8%,RSD均在1.3%～4.8%。结论:该方法准确,灵敏度高,重复性好,成本低,可用于防风中上述6个主要有效成分的含量测定。