GLB prevents tumor metastasis of Lewis lung carcinoma by inhibiting tumor adhesion actions

Abstract

Aim: To investigate the inhibitory effect of a new compound of GLB on tumor metastasis in vivo and analyze its actions on tumor cell adhesion to clarify its mechanism. Methods: The effect of GLB on tumor metastasis was analyzed by Lewis lung carcinoma model. The pathological morphology of lung alveolar was evaluated by hematoxylin-eosin staining. The effect of GLB on the proliferation of human prostate cancer cell (PC-3M, with a high metastatic characteristic) was studied using the MTT method, and its actions on PC-3M cell adhesion to human umbilical vein endothelial cells (HUVEC) and laminin were analyzed in vitro. Results: GLB (100 mg·kg-1·d-1 for 28 d, ig) reduced the number of lung colonies of Lewis lung carcinoma metastasis significantly (P<0.05). Simultaneously, GLB could mitigate the damage of lung alveolar caused by metastasic tumor deposits. In vitro, GLB inhibited dramatically the adhesion of PC-3M cells to HUVEC (P< 0.01) and laminin (P<0.05), without cytotoxic or anti-proliferative action on PC-3M cells. Conclusion: GLB has anti-tumor metastatic activity, which partly depends on its inhibition of tumor adhesion. ©2005 CPS and SIMM.