山柰挥发油对裸鼠原位移植人胃癌生长和细胞周期的影响

目的探讨山柰挥发油对裸鼠原位移植人胃癌MKN-45细胞增殖的抑制作用。方法建立裸鼠原位移植人胃癌MKN-45细胞模型。105只裸鼠随机分为山柰挥发油乳剂高、中、低剂量组,乳剂溶媒对照组,生理盐水组,环磷酰胺(cyclophosphamide,CTX)组和空白对照组,每组15只。各组裸鼠予以相应药物实施干预。观察各组荷瘤裸鼠一般情况、肿瘤生长情况及抑瘤率。流式细胞仪检测肿瘤细胞周期分布及细胞凋亡情况。电镜下观察肿瘤细胞超微结构的变化。结果山柰挥发油乳剂高、中、低剂量组的抑瘤率分别为57.2%、28.0%和5.0%,肿瘤细胞主要被阻滞于G0/G1期,与空白对照组比较差异有统计学意义,且呈剂量依赖效应。电镜下观察山柰挥发油乳剂高剂量组和CTX组可见较多凋亡细胞,而山柰挥发油乳剂中、低剂量组凋亡细胞较少。结论山柰挥发油对裸鼠原位移植人胃癌MKN-45细胞具有较好的抑制增殖作用,且呈剂量依赖效应,其机制可能与调节胃癌细胞周期、促进G1期阻滞及诱导细胞凋亡相关。

Effects of Rhizoma kaempferiae volatile oil on tumor growth and cell cycle of MKN-45 human gastric cancer cells orthotopically transplanted in nude mice

Objective: To evaluate the effects of Rhizoma kaempferiae volatile oil on tumor growth and cell cycle of MKN-45 human gastric cancer cells orthotopically transplanted in nude mice. Methods: One hundred and five nude mice orthotopically transplanted with MKN-45 human gastric cancer cells were randomly divided into seven groups: untreated group, normal saline-treated group, dissolvant-treated group, cyclophosphamide (CTX)-treated group and high-, medium-, and low-dose Rhizoma kaempferiae volatile oil-treated groups. Corresponding interventions were implemented in each group except the untreated group. The antitumor effects in vivo were evaluated. Cell cycle distribution and apoptosis of MKN-45 human gastric cancer cells were determined by using flow cytometry (FCM). The ultrastructure of MKN-45 gastric cancer cells was observed by a transmission electron microscope. Results: In the high-, medium-, and low-dose Rhizoma kaempferiae volatile oil-treated groups, the growth inhibition rates of gastric cancer were 57.2%, 28.0% and 5.0% respectively, and the gastric cancer cells were arrested at G_ 0 /G_ 1 phase. This antitumor effect was dose-dependent. The apoptotic cells occurred more frequently in the high-dose Rhizoma kaempferiae volatile oil-treated group and the CTX-treated group than those in the medium-and low-dose Rhizoma kaempferiae volatile oil-treated groups. Conclusion: The Rhizoma kaempferiae volatile oil is an effective composition for growth inhibition of gastric cancer, and its mechanism may be related to regulating the cell cycle and inducing apoptosis.