肿瘤相关抗原CHP2促进HEK293细胞在裸鼠腹腔内的转移

Tumor associated antigen CHP2 promotes intraperitoneal metastasis of HEK293 cells in nude mice

目的:研究肿瘤相关抗原CHP2对HEK293细胞在裸鼠腹腔内转移能力的影响,并初步探讨其可能的分子机制。方法:通过Boyden小室法检测CHP2转染细胞和对照细胞的体外转移能力。对BALB/c裸鼠进行腹腔接种,观察裸鼠体内的成瘤与组织浸润情况并进行HE染色。利用RT-PCR方法检测HEK293细胞中部分转移相关分子的基因表达水平。结果:CHP2增强HEK293细胞在体外穿过Matrigel胶的侵袭能力,同时显著加速HEK293细胞在裸鼠腹腔内的成瘤速度并促进肿瘤对腹腔主要脏器的浸润。CHP2上调转移相关分子骨桥蛋白(osteopon-tin,OPN)在HEK293细胞中的表达,但对基质金属蛋白酶MMP2的表达没有明显影响。结论:CHP2显著增强HEK293细胞在体外及裸鼠腹腔内的转移能力,OPN表达上调可能参与CHP2对HEK293细胞的转移促进作用。

Objective ： To investigate the effect of tumor associate antigen of CHP2 on the metastatic potential of HEK293 cells in nude mice. Methods： Matrigel testing by Boyden chamber and intraperitoneal inoculation of BALB/c nude mice were respectively performed to detect the metastatic potential of HEK293 transfectants in vitro and in vivo. HE staining was used to confirm the tumor metastasis in related organs. Molecules probably involved in metastasis of HEK293 cells were screened by RT-PCR. Results： CHP2 significantly promoted the migration of HEK293 cells through matrigel in vitro. CHP2 accelerated the tumorigenesis of HEK293 cells in nude mice and tissue invasion was observed in spleen, kidney and liver. CHP2 up-regulated osteopontin （OPN） expression in HEK293 cells, but had no effect on MMP2 expression. Conclusion： CHP2 enhanced the migration and metastasis of HEK293 cells in vitro and in vivo. Up-regulated OPN expression might contribute to the invasive potential of HEK293 cells.