Cabazitaxel inhibits prostate cancer cell growth by inhibition of androgen receptor and heat shock protein expression.

Abstract:

PURPOSE:Cabazitaxel, a semi-synthetic taxane of the third generation, inhibits prostate cancer (PC) cell growth by affecting the microtubule architecture. Since cabazitaxel has also been demonstrated to inhibit androgen receptor (AR) functionality, AR and AR-associated heat shock protein (HSP) expressions in the presence of cabazitaxel were characterized. METHODS:AR and HSP expressions were assessed via Western blotting utilizing a PC-cell-line in vitro system incubated with cabazitaxel. RESULTS:Incubation experiments with 0.3 nM cabazitaxel exhibited significantly reduced levels of AR and the AR-associated factors HSP90α, HSP40, and HSP70/HSP90 organising protein. Furthermore, expression of the anti-apoptotic factor HSP60 was suppressed. In contrast to other anticancer compounds, cabazitaxel did not alter the cytoprotective chemoresistance factor HSP27. CONCLUSIONS:Despite the deregulation of microtubule organisation, cabazitaxel has been shown to suppress the expression of HSP. Very notably, and may be as a result of down-regulated HSP, cabazitaxel additionally inhibits the expression of the AR in AR-positive PC cells. Thus, cabazitaxel bears an additional anti-proliferative activity which is at least in part specific for PC cells.

journal_name

World J Urol

journal_title

World journal of urology

authors

Rottach AM,Ahrend H,Martin B,Walther R,Zimmermann U,Burchardt M,Stope MB

doi

10.1007/s00345-018-2615-x

subject

Has Abstract

pub_date

2019-10-01 00:00:00

pages

2137-2145

issue

10

eissn

0724-4983

issn

1433-8726

pii

10.1007/s00345-018-2615-x

journal_volume

37

pub_type

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