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Aberrantly methylated genes in human papillary thyroid cancer and their association with BRAF/RAS mutation

Overview of attention for article published in Frontiers in Genetics, January 2013
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Title
Aberrantly methylated genes in human papillary thyroid cancer and their association with BRAF/RAS mutation
Published in
Frontiers in Genetics, January 2013
DOI 10.3389/fgene.2013.00271
Pubmed ID
Authors

Yasuko Kikuchi, Eiichi Tsuji, Koichi Yagi, Keisuke Matsusaka, Shingo Tsuji, Junichi Kurebayashi, Toshihisa Ogawa, Hiroyuki Aburatani, Atsushi Kaneda

Abstract

Cancer arises through accumulation of epigenetic and genetic alteration. Aberrant promoter methylation is a common epigenetic mechanism of gene silencing in cancer cells. We here performed genome-wide analysis of DNA methylation of promoter regions by Infinium HumanMethylation27 BeadChip, using 14 clinical papillary thyroid cancer samples and 10 normal thyroid samples. Among the 14 papillary cancer cases, 11 showed frequent aberrant methylation, but the other three cases showed no aberrant methylation at all. Distribution of the hypermethylation among cancer samples was non-random, which implied existence of a subset of preferentially methylated papillary thyroid cancer. Among 25 frequently methylated genes, methylation status of six genes (HIST1H3J, POU4F2, SHOX2, PHKG2, TLX3, HOXA7) was validated quantitatively by pyrosequencing. Epigenetic silencing of these genes in methylated papillary thyroid cancer cell lines was confirmed by gene re-expression following treatment with 5-aza-2'-deoxycytidine and trichostatin A, and detected by real-time RT-PCR. Methylation of these six genes was validated by analysis of additional 20 papillary thyroid cancer and 10 normal samples. Among the 34 cancer samples in total, 26 cancer samples with preferential methylation were significantly associated with mutation of BRAF/RAS oncogene (P = 0.04, Fisher's exact test). Thus, we identified new genes with frequent epigenetic hypermethylation in papillary thyroid cancer, two subsets of either preferentially methylated or hardly methylated papillary thyroid cancer, with a concomitant occurrence of oncogene mutation and gene methylation. These hypermethylated genes may constitute potential biomarkers for papillary thyroid cancer.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 36 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 36 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 6 17%
Researcher 6 17%
Student > Ph. D. Student 4 11%
Student > Postgraduate 3 8%
Professor 2 6%
Other 5 14%
Unknown 10 28%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 13 36%
Medicine and Dentistry 8 22%
Agricultural and Biological Sciences 2 6%
Computer Science 1 3%
Unspecified 1 3%
Other 2 6%
Unknown 9 25%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 December 2013.
All research outputs
#20,211,690
of 22,733,113 outputs
Outputs from Frontiers in Genetics
#8,548
of 11,757 outputs
Outputs of similar age
#248,813
of 280,780 outputs
Outputs of similar age from Frontiers in Genetics
#263
of 319 outputs
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