IMR Press / FBL / Volume 17 / Issue 2 / DOI: 10.2741/3934

Frontiers in Bioscience-Landmark (FBL) is published by IMR Press from Volume 26 Issue 5 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Frontiers in Bioscience.

Review
Profiling of linker histone variants in ovarian cancer
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1 School of Biology, Georgia Institute of Technology, 310 Ferst Drive, Atlanta, GA, 30332, USA
2 The Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA, 30332, USA
3 Ovarian Cancer Institute, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA, 30332, USA
Front. Biosci. (Landmark Ed) 2012, 17(2), 396–406; https://doi.org/10.2741/3934
Published: 1 January 2012
Abstract

H1 linker histones play a key role in facilitating higher order chromatin folding. Emerging evidence suggests that H1 and its multiple variants are important epigenetic factors in modulating chromatin function and gene expression. Ovarian cancer is a devastating disease, ranking the fifth leading cause of all women cancer death due to its poor prognosis and difficulty in early diagnosis. Although epigenetic alterations in ovarian cancers are being appreciated in general, the role of H1 has not been explored. Here, using quantitative RT-PCR assays, we systematically examined the expression of 7 H1 genes in 33 human epithelial ovarian tumors. Whereas the expression of H1.3 was markedly increased, the expression of H10, H1.1, H1.4 and H1x were significantly reduced in malignant adenocarcinomas compared with benign adenomas. Strikingly, ovarian adenocarcinomas and adenomas exhibited characteristic expression patterns, and expression profiling of 7 H1 genes in tumor samples discriminated adenocarcinomas vs. adenomas with high accuracy. These findings indicate that the expression of H1 variants is exquisitely regulated and may serve as potential epigenetic biomarkers for ovarian cancer.


Keywords
H1 Linker Histones
H1 Variants
Gene Expression Profiling
Ovarian Cancer
Clustering
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