胃镜下局部注射大蒜素对进展期胃癌细胞增殖及凋亡的影响

目的 探讨胃镜下大蒜素局部应用对进展期胃癌的影响及作用机制。方法 进展期胃癌患者80例，胃镜及病理均证实为腺癌，分为两组；大蒜素组40例，术前48 h胃镜下病变处局部注射大蒜素，对照组40例局部注射生理盐水；手术切除胃癌组织，采用美国Becton Dickinson公司产的FACS-420型流式细胞仪检测，观察胃癌组织周期（G0/G1期、S期、G2/M期）各时相百分比、细胞凋亡率、增殖指数（proliferation index，PI），以及胃癌组织细胞凋亡相关基因（Fas、Bax、Bcl-2）蛋白表达。结果 大蒜素组与对照组细胞凋亡率（%）分别为9.60±1.52、2.20±0.58， G0/G1期（%）分别为72.12±8.35、69.56±5.15， G2/M期（%）分别为9.54±3.20、13.20±3.05，PI值分别为27.80±8.35、30.40±5.15；两组比较，差异均有统计学意义（P＜0.05，P＜0.01）；大蒜素组可增加凋亡促进基因Bax基因蛋白、凋亡始动基因Fas基因蛋白的表达（P＜0.05，P＜0.01），降低凋亡抑制基因Bcl-2基因蛋白的表达（P＜0.05）。结论 本项研究初步证明胃镜下局部注射大蒜素能够抑制进展期胃癌组织细胞生长、增殖，并促进胃癌细胞凋亡。

Effect of Local Application of Allicin via Gastroscopy on Cell Proliferation and Apoptosis of Progressive Gastric Carcinoma

OBJECTIVE: To study the effects of local application of allicin via gastroscopy on progressive gastric carcinoma, and to investigate its possible mechanisms. METHODS: Eighty patients with progressive gastric adenocarcinoma, whose diagnosis was confirmed by gastroscopy and pathological examination, were assigned to 2 groups, 40 in each group. Forty-eight hours before operation, allicin was infused via gastroscopy to the lesion region of patients in the allicin group, and normal saline was infused instead to those in the control group. The gastric carcinoma tissue gotten from gastrectomy was taken to determine the percentage of cells in various cell cycle phases ( G0/ G1, S and G2/M), the cell apoptosis rate, proliferation index value and apoptosis related gene protein such as Fas, Bax and Bcl-2 by flow cytometry. RESULTS: In the allicin group, the cell apoptosis rate was 9.60 +/- 1.52%, the percentage of cell in G0/G1 phase was 72.12 +/- 8.35%, in G2/M phase 9.54 +/- 3.20%, and PI 27.80 +/- 8.35, while in the control group, the corresponding data was 2.20 +/- 0.58%, 69.56 +/- 5.15%, 13.20 +/- 3.05%, and 30.40 +/- 5.15, respectively, and significant difference in all the 4 indexes could be found between the two groups (P < 0.05, P < 0.01). Moreover, allicin showed effects in up-regulating the protein expressions of apoptosis promoting gene Bax and apoptosis initiating gene Fas (P < 0.05, P < 0.01), and down-regulating that of anti-apoptosis gene Bcl-2 (P < 0.05). CONCLUSION: Local application of allicin via gastroscopy can inhibit the cell growth and proliferation of progressive gastric carcinoma, and can also promote gastric carcinoma cell apoptosis.