小鼠肝癌细胞特异性淋巴道转移与其基质金属蛋白酶分泌的关系

目的　探讨肿瘤细胞基质金属蛋白酶 (MMPs)分泌与特异性淋巴结转移的关系。方法　将自建高、低转移小鼠肝癌细胞系HCa F(高转移 )和HCa P(低转移 )在培养时 ,分别加入淋巴结、肝脏或脾脏匀浆 ,离心收集培养上清 ,用明胶酶谱法检测两株癌细胞在不同培养环境下分泌的MMPs酶谱 ,分析两者的差异。结果　在单纯RPMI16 40培养基中HCa F和HCa P细胞仅能分泌少量MMP 9(12 5 6± 15 7,2 6 42± 385 ) ,加入淋巴结匀浆后HCa F细胞分泌MMP 9显著增强 (12 40 3± 894) ,且分泌MMP 9的活性型和MMP 2 ;HCa P细胞也分泌MMP 9(90 6 8± 6 86 )及其活性型 (3 914± 12 5 3)和MMP 2(2 997± 1990 ) ,但量均明显低于HCa F细胞 ;加入肝脏或脾脏匀浆后 ,HCa F和HCa P细胞均不分泌MMPs。结论　HCa F细胞强于HCa P细胞的转移能力可能与HCa F细胞分泌MMPs的能力强于HCa P细胞相关 ,而HCa F和HCa P细胞仅在淋巴结成分诱导下才能分泌较多的MMPs,这可能与它们具有特异性地向淋巴结转移的功能密切相关。

Zymographic analysis of matrix metalloproteinases in mouse carcinoma cell lines with different lymphatic metastasis potential

OBJECTIVE: To investigate the correlation between lymphatic metastasis and matrix metalloproteinases (MMPs) activity. METHODS: Zymographic analysis was used to detect the difference of MMPs product and activities between high lymphatic metastatic cell line (HCa-F) and low lymphatic metastatic cell line (HCa-P), that were cultured in the medium including homogenate of lymph node or liver or spleen tissue. RESULTS: HCa-F and HCa-P cells produced small quantities of MMP-9 in 1640 medium. After adding lymph node homogenate to the culture medium, F cells produced a large quantity of MMP-9 as well as active MMP-9 and MMP-2. P cells also produced MMP-9, active MMP-9 and MMP-2, but were much lower than that of F cells. Neither F cells nor P cells produced MMPs in the media with homogenate of liver or spleen added. CONCLUSION: The metastatic potential of F cells is stronger than that of P cells may be due to F cell's ability to secrete MMPs is stronger than P cell's, therefore the production of MMPs of hepatocarcinoma cells is closely correlated to their metastatic potential.