Cited by 79Prostate Cancer Treatment and ResearchEstrogen and related hormone effectsChromatin Remodeling and Cancer

Mechanisms of androgen receptor activation in advanced prostate cancer: differential co-activator recruitment and gene expression.

Brooke, G N, Parker, M G, Bevan, C L·2008·Oncogene

Abstract

Prostate tumour growth depends on androgens; hence treatment includes androgen ablation and anti-androgens. Eventually tumours progress and in approximately 30% of patients this is associated with mutation of the androgen receptor. Several receptor variants associated with advanced disease show promiscuous activation by other hormones and anti-androgens. Such loss of specificity could promote receptor activation, hence tumour growth, in the absence of conventional ligands, explaining therapy failure. We aimed to elucidate mechanisms by which alternative ligands promote receptor activation. The three most commonly identified variants in tumours (with amino-acid substitutions H874Y, T877A and T877S) and wild-type receptor showed differences in co-activator recruitment dependent upon ligand and the interaction motif utilized. Co-expression and knockdown of co-activators that bind via leucine or phenylalanine motifs, combined with chromatin immunoprecipitation and quantitative PCR, revealed these preferences extend to co-activator recruitment in vivo and affect receptor activity at the transcriptional level, with subsequent effects on target gene regulation. The findings suggest that mutant receptors, activated by alternative ligands, drive growth via different mechanisms to androgen-activated wild-type receptor. Tumours may hence behave differently dependent upon any androgen receptor mutation present and what ligand is driving growth, as distinct subsets of genes may be regulated.

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Crossref · 10.1038/sj.onc.1210955

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55 of 55 references verified0 citation errors · 0 not checkable

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  • Three ligand-binding domain mutations commonly found in patient tumors, H874Y, T877A, and T877S, impart additional capacity for androgen receptor binding to motifs associated with coregulator proteins and stimulate expression of AR target genes, in addition to being activated by selective AR modulators, antiandrogens, and other hormones, compared with wild-type AR.

    “Three LBD mutations that are commonly found in patient tumors, H874Y, T877A, and T877S, impart additional capacity for AR binding to motifs associated with coregulator proteins as well as stimulating the expression of AR target genes in addition to being activated by selective AR modulators, antiandrogens, and other hormones when compared with the wild-type AR (73).”

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Authors
Brooke, G. N., Parker, M. G., & Bevan, C. L.
Affiliations
Imperial College London (GB)
Corresponding author
Bevan, C L
Venue
Oncogene
Published
2007-11-26
Volume
27
Issue
21
Pages
2941-2950
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W1990930634
Cited by
79
References
55
Citations by year
2026: 3 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 3 · 2017: 5 · 2016: 6 · 2015: 7 · 2014: 2 · 2013: 6 · 2012: 7
FWCI
5.42
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • Open Access at Essex (University of Essex) (submittedVersion)
Funders
Medical Research Council
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Estrogen and related hormone effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
androgen receptor, advanced prostate cancer, androgen receptor mutations, coactivator recruitment, antiandrogen resistance, transcriptional regulation, target gene expression
MeSH terms
HeLa Cells, Humans, Male, Mutation, Prostatic Neoplasms, Receptors, Androgen, Transcriptional Activation, Gene Expression, Polymerase Chain Reaction, Chromatin Immunoprecipitation

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