Title : NF-kappa B inhibition markedly enhances sensitivity of resistant breast cancer tumor cells to tamoxifen.

Pub. Date : 2004 Jun

PMID : 15151944






4 Functional Relationships(s)
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1 Breast cancer cell lines expressing a constitutively active Akt are able to proliferate under reduced estrogen conditions, and are resistant to the growth inhibitory effects of tamoxifen. Tamoxifen AKT serine/threonine kinase 1 Homo sapiens
2 Understanding the targets of Akt signaling mediating tamoxifen resistance is of clinical significance. Tamoxifen AKT serine/threonine kinase 1 Homo sapiens
3 In the present study, we found that Akt activity correlated with phosphorylation of I kappa B (the negative regulator of NF-kappa B), NF-kappa B DNA binding and tamoxifen resistance in vivo. Tamoxifen AKT serine/threonine kinase 1 Homo sapiens
4 Importantly, we found that co-treatment with the NF-kappa B inhibitor, parthenolide, or overexpression of I kappa B superrepressor restored tamoxifen sensitivity to our refractory Akt MCF-7 cells. Tamoxifen AKT serine/threonine kinase 1 Homo sapiens