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Global histone modifications in breast cancer correlate with tumor phenotypes, prognostic factors, and patient outcome

Elsheikh, Somaia E., Green, Andrew R., Rakha, Emad A., Powe, Des G., Ahmed, Rabab A., Collins, Hilary M., Soria, Daniele, Garibaldi, Jonathan M., Paish, Claire E., Ammar, Amr A., and others. (2009) Global histone modifications in breast cancer correlate with tumor phenotypes, prognostic factors, and patient outcome. Cancer research, 69 (9). pp. 3802-3809. ISSN 0008-5472. E-ISSN 1538-7445. (doi:10.1158/0008-5472.CAN-08-3907) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:76750)

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Post-translational histone modifications are known to be altered in cancer cells, and loss of selected histone acetylation and methylation marks has recently been shown to predict patient outcome in human carcinoma. Immunohistochemistry was used to detect a series of histone lysine acetylation (H3K9ac, H3K18ac, H4K12ac, and H4K16ac), lysine methylation (H3K4me2 and H4K20me3), and arginine methylation (H4R3me2) marks in a well-characterized series of human breast carcinomas (n = 880). Tissue staining intensities were assessed using blinded semiquantitative scoring. Validation studies were done using immunofluorescence staining and Western blotting. Our analyses revealed low or absent H4K16ac in the majority of breast cancer cases (78.9%), suggesting that this alteration may represent an early sign of breast cancer. There was a highly significant correlation between histone modifications status, tumor biomarker phenotype, and clinical outcome, where high relative levels of global histone acetylation and methylation were associated with a favorable prognosis and detected almost exclusively in luminal-like breast tumors (93%). Moderate to low levels of lysine acetylation (H3K9ac, H3K18ac, and H4K12ac), lysine (H3K4me2 and H4K20me3), and arginine methylation (H4R3me2) were observed in carcinomas of poorer prognostic subtypes, including basal carcinomas and HER-2-positive tumors. Clustering analysis identified three groups of histone displaying distinct pattern in breast cancer, which have distinct relationships to known prognostic factors and clinical outcome. This study identifies the presence of variations in global levels of histone marks in different grades, morphologic types, and phenotype classes of invasive breast cancer and shows that these differences have clinical significance.

Item Type: Article
DOI/Identification number: 10.1158/0008-5472.CAN-08-3907
Uncontrolled keywords: breast cancer; histone modifications; patient outcome
Subjects: R Medicine > RC Internal medicine > RC254 Neoplasms. Tumors. Oncology
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Computing
Depositing User: Daniel Soria
Date Deposited: 04 Oct 2019 08:51 UTC
Last Modified: 16 Nov 2021 10:26 UTC
Resource URI: (The current URI for this page, for reference purposes)

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