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Inhibition of invasiveness and expression of epidermal growth factor receptor in human colorectal carcinoma cells induced by retinoic acid

机译:维甲酸对人大肠癌细胞侵袭性及表皮生长因子受体表达的抑制作用

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摘要

Human amniotic basement membrane (HABM) model and agarose drop explant method were used to investigate the effects of retinoic acid( RA) on the invasive-ness and adhesiveness to the basement membrane,and the migration of a highly invasive human colorectal cancer cell line CCL229. Results showed that 5 x 10~6 MRA markedly reduced the in vitro invasiveness and adhesiveness to the HABM, and the migration of the CCL229 cells. In addition, to elucidate the relation between expression of epidermal growth factor receptor (EGFR) and the invasiveness of the colorectal carcinoma cells, two well-differentiated, but with different invasiveness colorectal cancer cell lines were compared at mRNA level for expression of EGFR by using EGFR cDNA probe labeled with digoxigenin (DIG). Expression of EGFR was shown to be markedly higher in the highly invassive CCL229 cells than that in the low invasive CX-1 cells. Furthermore, expression of EGFR in RA treated CCL229 cells gradually decreased with time, the level being the lowest on day 6 of the RA treatment.
机译:使用人类羊膜基底膜(HABM)模型和琼脂糖滴落外植体方法研究视黄酸(RA)对基底膜的侵袭性和粘附性以及高侵袭性人类结直肠癌细胞系CCL229迁移的影响。结果表明,5 x 10〜6 MRA显着降低了其对HABM的体外侵袭性和粘附性以及CCL229细胞的迁移。此外,为了阐明表皮生长因子受体(EGFR)的表达与大肠癌细胞侵袭性之间的关系,通过使用cDNA在mRNA水平上比较了两种分化良好但具有不同侵袭性的大肠癌细胞系中EGFR的表达。用洋地黄毒苷(DIG)标记的EGFR cDNA探针。 EGFR的表达在高侵袭性CCL229细胞中比在低侵袭性CX-1细胞中显着更高。此外,在RA处理的CCL229细胞中EGFR的表达随时间逐渐降低,该水平在RA处理的第6天最低。

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