NF-kappa B activates prostate-specific antigen expression and is upregulated in androgen-independent prostate cancer.

Molecular and Cellular Biology
Charlie D Chen, Charles L Sawyers

Abstract

The transcription factor NF-kappa B regulates gene expression involved in cell growth and survival and has been implicated in progression of hormone-independent breast cancer. By expressing a dominant-active form of mitogen-activated protein kinase kinase kinase 1, by exposure to tumor necrosis factor alpha, or by overexpression of p50/p65, we show that NF-kappa B activates a transcription regulatory element of the prostate-specific antigen (PSA)-encoding gene, a marker for prostate cancer development, treatment, and progression. By DNase I footprinting, we identified four NF-kappa B binding sites in the PSA core enhancer. We also demonstrate that androgen-independent prostate cancer xenografts have higher constitutive NF-kappa B binding activity than their androgen-dependent counterparts. These results suggest a role of NF-kappa B in prostate cancer progression.

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