van Agthoven T, van Agthoven T L, Dekker A, van der Spek P J, Vreede L, Dorssers L C
Department of Molecular Biology, Daniel den Hoed Cancer Center, University Hospital Rotterdam, Rotterdam, The Netherlands.
EMBO J. 1998 May 15;17(10):2799-808. doi: 10.1093/emboj/17.10.2799.
The antiestrogen tamoxifen is important in the treatment of hormone-dependent breast cancer, although development of resistance is inevitable. To unravel the molecular mechanisms of antiestrogen resistance, a search for involved genes was initiated. Retrovirus-mediated insertional mutagenesis was applied to human ZR-75-1 breast cancer cells. Infected cells were subjected to tamoxifen selection and a panel of resistant cell clones was established. Screening for a common integration site resulted in the identification of a novel gene designated BCAR3. Transfer of this locus by cell fusion or transfection of the BCAR3 cDNA to ZR75-1 and MCF-7 cells induces antiestrogen resistance. BCAR3 represents a putative SH2 domain-containing protein and is partly homologous to the cell division cycle protein CDC48.
抗雌激素药物他莫昔芬在激素依赖性乳腺癌的治疗中具有重要作用,尽管耐药性的产生不可避免。为了阐明抗雌激素耐药的分子机制,人们开始寻找相关基因。逆转录病毒介导的插入诱变技术被应用于人类ZR-75-1乳腺癌细胞。对感染的细胞进行他莫昔芬筛选,建立了一组耐药细胞克隆。通过筛选共同整合位点,鉴定出一个名为BCAR3的新基因。通过细胞融合或将BCAR3 cDNA转染到ZR75-1和MCF-7细胞中转移该基因座可诱导抗雌激素耐药。BCAR3是一种推测含有SH2结构域的蛋白质,与细胞分裂周期蛋白CDC48部分同源。