摘要
Objective: To look for additional markers of molecular biology response to anastrozole, a new aromatase inhibitor, on the growth and mRNA expression level of MCF-7 cell. Methods: We investigated the effect of anastrzole on growth and gene expression in the human breast cancer cell line MCF-7 and compared with the most widely used antiestrogen tamoxifen. We chose 4 genes to examine regulation of gene expression of estrogen regulated genes: PR A, PR B, ErbB-2 and cyclin D1. Results: Compared with the tamoxifen, a statistically significant growth inhibition was observed with anastrozole. The PR A, PR B and cyclin D1 mRNA level in anastrozole treated cells was sigificantly below the level in tamoxifen treated cells (P<0. 05). They had agonistic effect on ErbB gene (P>0. 05). Conclusion: The third generation of aromatase inhibitors anastrozole exert more inhibit function in some expression of estrogen regulated genes than tomoxifen in MCF-7 cell line.
Objective： To look for additional markers of molecular biology response to anastrozole, a new aromatase inhibitor, on the growth and mRNA expression level of MCF-7 cell. Methods： We investigated the effect of anastrzole on growth and gene expression in the human breast cancer cell line MCF-7 and compared with the most widely used antiestrogen tamoxifen. We chose 4 genes to examine regulation of gene expression of estrogen regulated genes ： PR A, PR B, ErbB-2 and cyclin D1. Results： Compared with the tamoxifen, a statistically significant growth inhibition was observed with anastrozole. The PR A, PR B and cyclin D1 mRNA level in anastrozole treated cells was sigificantly below the level in tamoxifen treated cells （P〈0. 05）. They had agonistic effect on ErbB gene （P〉0. 05）. Conclusion： The third generation of aromatase inhibitors anastrozole exert more inhibit function in some expression of estrogen regulated genes than tomoxifen in MCF-7 cell line.
