目的：探讨二烯丙基三硫化物(diallyl trisulfide，DATS)抑制缝线诱导的大鼠角膜新生血管(corneal neovascularization，CNV)的生长情况，检测大鼠新生血管化角膜中VEGF、p-AKT 的表达量，初步探讨其抑制CNV的可能机制。

方法：缝线法诱导大鼠CNV模型，随机分为A组：含DMSO的生理盐水对照组(10只)； B组：25μmol/L DATS治疗组(10只)； C组：50μmol/L DATS治疗组(10只)； D组：100μmol/L DATS治疗组(10只)； E组：200μmol/L DATS治疗组(10只)。缝线后第7d裂隙灯下观察各组CNV的生长情况并计算面积。缝线后第14d取各组大鼠角膜组织行HE 染色，光镜下观察各组角膜病理组织形态，并采用RT-PCR 法检测VEGF mRNA 的表达情况，Western-blot 法检测VEGF、p-AKT蛋白表达情况。

结果：C、D、E组的CNV面积分别与A组比较，差异均有统计学意义(P<0.05)。HE切片显示，与A组相比，B、C、D组角膜水肿、新生血管、炎症细胞浸润情况逐渐减轻。与A组相比，B、C、D、E组的VEGF mRNA 的表达水平均降低，差异均有统计学意义(P<0.05)。与A组相比，C、D、E组的VEGF、p-AKT蛋白的表达逐渐下降，差异均有统计学意义(P<0.05)。

结论：DATS 能够抑制缝线诱导的大鼠CNV的形成，其机制可能与抑制VEGF的表达及使得p-AKT的失活有关。

METHODS: The rat model of corneal neovascularization(CNV)was induced by corneal suture. Rats were randomly divided into Group A: physiological saline control group containing DMSO(10 rats); Group B: 25μmol/L DATS treatment group(10 rats); Group C: 50μmol/L DATS treatment group(10 rats); Group D: 100μmol/L DATS treatment group(10 rats); Group E: 200μmol/L DATS treatment group(10 rats). The occurrence and development of CNV were observed by slit-lamp microscope at 7d after suture, and the area of CNV were calculated.Two weeks later, HE staining was used to observe the pathological organization form of each cornea, and RT-PCR and Western blot were used to detect the expression of VEGF mRNA and protein expression of VEGF and p-AKT between each groups.

RESULTS: The blood vessel area of Group C, D and E was compared with that of Group A, the difference was statistically significant(P<0.05); HE slice showed corneal edema, angiogenesis and inflammation infiltration situation gradually reduced comparing with the Group A, with the increase of concentration of DATS. RT-PCR showed the expression of VEGF mRNA in Group B, C, D, and E decreased compared with the Group A, and the difference was statistically significant(P<0.05). Western-blot showed that the expressions of VEGF and p-AKT in Group B, C, D and E decreased gradually compared with those in Group A, and the difference was statistically significant(P<0.05).

CONCLUSION: DATS can inhibit corneal neovascularization of the rats induced by suture. Its mechanism may be associated with suppression of VEGF secretion, down-regulation of VEGF and inactivation of p-AKT.