Abstract:
:Elucidation of mechanisms underlying the increased androgen receptor (AR) activity and subsequent development of aggressive prostate cancer (PrCa) is pivotal in developing new therapies. Using a systems biology approach, we interrogated the AR-regulated proteome and identified PDZ binding kinase (PBK) as a novel AR-regulated protein that regulates full-length AR and AR variants (ARVs) activity in PrCa. PBK overexpression in aggressive PrCa is associated with early biochemical relapse and poor clinical outcome. In addition to its carboxy terminus ligand-binding domain, PBK directly interacts with the amino terminus transactivation domain of the AR to stabilise it thereby leading to increased AR protein expression observed in PrCa. Transcriptome sequencing revealed that PBK is a mediator of global AR signalling with key roles in regulating tumour invasion and metastasis. PBK inhibition decreased growth of PrCa cell lines and clinical specimen cultured ex vivo. We uncovered a novel interplay between AR and PBK that results in increased AR and ARVs expression that executes AR-mediated growth and progression of PrCa, with implications for the development of PBK inhibitors for the treatment of aggressive PrCa.
journal_name
Oncogenejournal_title
Oncogeneauthors
Warren AY,Massie CE,Watt K,Luko K,Orafidiya F,Selth LA,Mohammed H,Chohan BS,Menon S,Baridi A,Zhao W,Escriu C,Pungsrinont T,D'Santos C,Yang X,Taylor C,Qureshi A,Zecchini VR,Shaw GL,Dehm SM,Mills IG,Carroll JS,Tdoi
10.1038/s41388-018-0501-zsubject
Has Abstractpub_date
2019-02-01 00:00:00pages
1136-1150issue
7eissn
0950-9232issn
1476-5594pii
10.1038/s41388-018-0501-zjournal_volume
38pub_type
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