Epigenomics in Prostate Cancer

A special issue of Cancers (ISSN 2072-6694). This special issue belongs to the section "Cancer Pathophysiology".

Deadline for manuscript submissions: closed (31 May 2021) | Viewed by 2787

Special Issue Editor


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Guest Editor
Cancer Biology and Therapeutics Laboratory, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin, Ireland School of Biology and Environmental Science, University College Dublin, Dublin, Ireland
Interests: cancer epigenetics; cancer biomarkers; cancer biology & therapeutics; liquid biopsies

Special Issue Information

Dear Colleagues, 

Prostate cancer is one of the most common male malignancies in the world. The disease is notorious for its clinical and molecular heterogeneity. It displays a high incidence to mortality ratio, meaning that the majority of men experience a relatively low-risk, latent form of the disease. However, a proportion of tumours have an aggressive nature and hence prostate cancer is the 5th leading cause of cancer-related deaths in men worldwide. It is fair to say that molecular sub-classification of this malignancy has lagged behind that of other solid tumours. The fact that prostate cancer displays an atypically low mutation rate, has undoubtedly contributed to our lack of clarity on hallmark molecular features of aggressive and indolent disease. By contrast, epigenetic alterations are frequent during prostate cancer initiation and progression and indeed the disease is known to undergo an epigenetic catastrophe during the earliest stages of tumour development, with widespread promoter hypermethylation and silencing of regulatory genes. The advent, and now wide availability, of epigenome profiling technologies including array- and sequencing-based platforms has enabled a deep dive into the widespread distortion of the epigenome throughout all stages of prostate cancer.

Accompanying epigenomic alterations in this disease is a dysregulation of many key epigenetic readers, writers and erasers. Significant work in the field has demonstrated numerous regulatory circuits and important relationships between members of the non-coding RNA family, the androgen receptor and its pro-survival signalling pathway with methyltransferases and lysine deacetylases, among others.

This special issue will highlight the central, yet complex, role that epigenomics plays in prostate cancer, from disease development through to castration resistance, and the utility that it offers in disease detection, stratification and prognostication.

Dr. Antoinette S. Perry
Guest Editor

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Keywords

  • epigenetics
  • prostate cancer
  • biomarker
  • chromatin
  • DNA methylation
  • ncRNA
  • methyltranferase
  • deacetylase
  • demethylase
  • epigenetic therapies

Published Papers (1 paper)

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Research

11 pages, 1526 KiB  
Article
Copy Number Profiles of Prostate Cancer in Men of Middle Eastern Ancestry
by Alia Albawardi, Julie Livingstone, Saeeda Almarzooqi, Nallasivam Palanisamy, Kathleen E. Houlahan, Aktham Adnan Ahmad Awwad, Ramy A. Abdelsalam, Paul C. Boutros and Tarek A. Bismar
Cancers 2021, 13(10), 2363; https://doi.org/10.3390/cancers13102363 - 14 May 2021
Cited by 1 | Viewed by 2220
Abstract
Our knowledge of prostate cancer (PCa) genomics mainly reflects European (EUR) and Asian (ASN) populations. Our understanding of the influence of Middle Eastern (ME) and African (AFR) ancestry on the mutational profiles of prostate cancer is limited. To characterize genomic differences between ME, [...] Read more.
Our knowledge of prostate cancer (PCa) genomics mainly reflects European (EUR) and Asian (ASN) populations. Our understanding of the influence of Middle Eastern (ME) and African (AFR) ancestry on the mutational profiles of prostate cancer is limited. To characterize genomic differences between ME, EUR, ASN, and AFR ancestry, fluorescent in situ hybridization (FISH) studies for NKX3-1 deletion and MYC amplification were carried out on 42 tumors arising in individuals of ME ancestry. These were supplemented by analysis of genome-wide copy number profiles of 401 tumors of all ancestries. FISH results of NKX3-1 and MYC were assessed in the ME cohort and compared to other ancestries. Gene level copy number aberrations (CNAs) for each sample were statistically compared between ancestry groups. NKX3-1 deletions by FISH were observed in 17/42 (17.5%) prostate tumors arising in men of ME ancestry, while MYC amplifications were only observed in 1/42 (2.3%). Using CNAs called from arrays, the incidence of NKX3-1 deletions was significantly lower in ME vs. other ancestries (20% vs. 52%; p = 2.3 × 10−3). Across the genome, tumors arising in men of ME ancestry had fewer CNAs than those in men of other ancestries (p = 0.014). Additionally, the somatic amplification of 21 specific genes was more frequent in tumors arising in men of ME vs. EUR ancestry (two-sided proportion test; Q < 0.05). Those included amplifications in the glutathione S-transferase family on chromosome 1 (GSTM1, GSTM2, GSTM5) and the IQ motif-containing family on chromosome 3 (IQCF1, IQCF2, IQCF13, IQCF4, IQCF5, IQCF6). Larger studies investigating ME populations are warranted to confirm these observations. Full article
(This article belongs to the Special Issue Epigenomics in Prostate Cancer)
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