目的：观察双氢青蒿素（dihydroartemisinin ，DHA）对C2株蓝氏贾第鞭毛虫（Giardia lamblia）Alpha-7．3 giar-din （α-贾第素）基因mRNA表达水平的影响，探讨其对蓝氏贾第鞭毛虫骨架蛋白的损伤作用。方法用双氢青蒿素浓度为100μg/mL、200μg/mL的改良TYI-S-33培养基分别培养C2株蓝氏贾第鞭毛虫2 h、4 h、8 h、12 h后，以不含药物组为对照，实时荧光定量RT-PCR检测药物作用后Alpha-7．3 giardin基因mRNA表达水平的变化。结果双氢青蒿素作用虫体后Al-pha-7．3 giardin基因mRNA表达水平明显低于对照组，二者有显著性差异。结论双氢青蒿素对C2株蓝氏贾第鞭毛虫Al-pha-7．3 giardin基因mRNA的表达具有明显的抑制作用，抑制效果与药物浓度和作用时间相关，提示双氢青蒿素对蓝氏贾第鞭毛虫骨架蛋白具有损伤作用。%Effects of dihydroartemisinin (DHA) on the expression level of Alpha-7 .3 giardin mRNA in C2 Giardia lam-blia was investigated in this study to explore the damage to skeleton protein of C 2 Giardia lamblia .Giardia lamblia was culti-vated respectively for 2 ,4 ,8 ,and 12 hours with modified TYI-S-33 medium containing 100 μg/mL and 200 μg/mL DHA , while the control group performed in the same experimental conditions without DHA .The expressive quantity of Alpha-7 .3 gi-ardin mRNA was determined by using real-time reverse transcription PCR ,and then we found that the expressive quantities of Alpha-7 .3 giardin mRNA with DHA were significantly lower than those in the control group .It’s suggested that dihydroarte-misinin has obvious inhibitory effect on the expression level of Alpha-7 .3 giardin mRNA in C2 Giardia lamblia .The actions of dihydroartemisinin on skeleton protein of C2 Giardia lamblia are effective .
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