Nur77 inhibits androgen-induced bladder cancer growth.

Abstract:

:Currently, bladder cancer ranks as the second most common genitourinary malignancy which is exacting significant morbidity and mortality worldwide. Although there are abundant epidemiological and basic studies which strongly suggest the role of androgen hormone in bladder cancer, the underlying mechanism is not fully understood. In the current study, we sought to identify a new competitive inhibitor for androgen receptor in bladder cancer cells. Our results showed that Nur77 hyperexpression inhibits UM-UC-3 cell growth and cell cycle progression while Nur77 knockdown exerts the opposite effect. In our cell culture model, we also demonstrated that Nur77 competitively inhibits androgen-dependent transcription activity and more specifically, Nur77 competes with androgen receptor for binding to src-1, a well-known coactivator for steroids. More importantly, we also showed that a small molecule agonist for Nur77, Cytosporone B, significantly inhibits androgen-dependent bladder cancer cell growth in two different cell lines. These data provide a good proof-of-principle that Nur77 signaling machinery could be a new target for growth control of androgen-dependent bladder cancer cells.

journal_name

Cancer Invest

journal_title

Cancer investigation

authors

Wu J,Liu J,Jia R,Song H

doi

10.3109/07357907.2013.853077

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

654-60

issue

10

eissn

0735-7907

issn

1532-4192

journal_volume

31

pub_type

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