The PAX8 cistrome in epithelial ovarian cancer

Adler, E., Corona, R., Lee, J., Rodriguez-Malave, N., Mhawech-Fauceglia, P., Sowter, H. ORCID: 0000-0002-1408-1900, Hazelett, D., Lawrenson, K. and Gayther, S., 2017. The PAX8 cistrome in epithelial ovarian cancer. Oncotarget, 8 (65), pp. 108316-108332. ISSN 1949-2553

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PAX8 is a lineage-restricted transcription factor that is expressed in epithelial ovarian cancer (EOC) precursor tissues, and in the major EOC histotypes. Frequent overexpression of PAX8 in primary EOCs suggests this factor functions as an oncogene during tumorigenesis, however, the biological role of PAX8 in EOC development is poorly understood. We found that stable knockdown of PAX8 in EOC models significantly reduced cell proliferation and anchorage dependent growth in vitro, and attenuated tumorigenicity in vivo. Chromatin immunoprecipitation followed by next generation sequencing (ChIP-seq) and transcriptional profiling were used to create genome-wide maps of PAX8 binding and putative target genes. PAX8 binding sites were significantly enriched in promoter regions (p < 0.05) and superenhancers (p < 0.05). MEME-ChIP analysis revealed that PAX8 binding sites overlapping superenhancers or enhancers, but not promoters, were enriched for JUND/B and ARNT/AHR motifs. Integrating PAX8 ChIP-seq and gene expression data identified PAX8 target genes through their associations within shared topological association domains. Across two EOC models we identified 62 direct regulatory targets based on PAX8 binding in promoters and 1,330 putative enhancer regulatory targets. SEPW1, which isinvolved inoxidation-reduction,was identified as a PAX8 target gene in both cell line models. While the PAX8 cistrome exhibits a high degree of cell-type specificity, analyses of PAX8 target genes and putative cofactors identified common molecular targets and partners as candidate therapeutic targets for EOC.

Item Type: Journal article
Publication Title: Oncotarget
Creators: Adler, E., Corona, R., Lee, J., Rodriguez-Malave, N., Mhawech-Fauceglia, P., Sowter, H., Hazelett, D., Lawrenson, K. and Gayther, S.
Publisher: Impact Journals
Date: 2017
Volume: 8
Number: 65
ISSN: 1949-2553
Rights: Published in an Open Access journal, paid for by co-authors. Copyright: Adler et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License 3.0 (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 25 Nov 2019 09:53
Last Modified: 01 May 2020 09:00

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