ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of angiogenesis inhibitor SU6668 on the growth and metastasis of gastric cancer in SCID mice.</p><p><b>METHODS</b>Metastatic model was established by orthotopic implantation of histologically intact human tumor tissue into the gastric wall of SCID mice. Forty-eight mice were randomly divided into four groups, and saline, 5-FU, SU6668, and 5-FU plus SU6668 were administered by i.p. every day for 6 weeks after tumor implantation. The mice were killed and tumor weight, tumor inhibition rate, intratumoral microvessel density(MVD), apoptotic index(AI) and metastasis inhibition were evaluated.</p><p><b>RESULTS</b>Compared with the control, tumor growth was significantly inhibited in mice treated respectively with 5-FU, SU6668 and 5-FU plus SU6668 with inhibition rates of 47.5%, 64.1% and 69.2% respectively. Decreased MVD and increased AI were noted in the mice treated with SU6668 and 5-FU plus SU6668. The incidences of liver and peritoneal metastases was significantly inhibited and decreased to 62.5%, 69.9% in SU6668 group, and 74.9%, 90% in 5-FU plus SU6668 group. The growth and metastasis of human gastric cancer implanted in SCID mice were significantly inhibited in SU6668 group and combined group, especially in combined group.</p><p><b>CONCLUSION</b>Angiogenesis inhibitor SU6668 has a strong inhibitory effect on tumor growth and metastasis of human gastric cancer transplanted in SCID mice, and has synergistic effect combined with cytotoxic agents.</p>