Document Detail


Epigenetic deregulation of EVC confers robust Hedgehog signaling in adult T-cell leukemia.
MedLine Citation:
PMID:  24996003     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
One of hallmarks of cancer, global gene expression alteration is closely associated with the development and malignant characteristics associated with adult T-cell leukemia (ATL) as well as other cancers. Here we show that aberrant overexpression of Ellis Van Creveld (EVC) family is responsible for cellular Hedgehog (HH) activation, which provides the pro-survival ability of ATL cells. We have demonstrated using microarray, quantitative RT-PCR, and immunohistochemistry that EVC is significantly upregulated in ATL and HTLV-1-infected cells. Epigenetic marks, including histone H3 acetylation and Lys4 trimethylation, are specifically accumulated at the EVC locus in ATL samples. HTLV-1 Tax participates in the coordination of EVC expression in an epigenetic fashion. The treatment of shRNAs targeting EVC, as well as the transcription factors for HH signaling diminishes the HH activation and leads to apoptotic death in ATL cell lines. Finally, we also show that a HH signaling inhibitor, GANT61, induces strong apoptosis in the established ATL cell lines and patient-derived primary ATL cells. Therefore, our data indicate that HH activation is involved in the regulation of leukemic cell survival. The epigenetically deregulated EVC appears to play an important role for HH activation. The possible use of EVC1 as a specific cell marker and a novel drug target for HTLV-1 infected T-cells is implicated by these findings. HH inhibitors are suggested as drug candidates for ATL therapy. Our findings also suggest chromatin rearrangement associated with active histone markers in ATL. This article is protected by copyright. All rights reserved.
Authors:
Ryutaro Takahashi; Makoto Yamagishi; Kazumi Nakano; Toshiko Yamochi; Tadanori Yamochi; Dai Fujikawa; Makoto Nakashima; Yuetsu Tanaka; Kaoru Uchimaru; Atae Utsunomiya; Toshiki Watanabe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-7-4
Journal Detail:
Title:  Cancer science     Volume:  -     ISSN:  1349-7006     ISO Abbreviation:  Cancer Sci.     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-7-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101168776     Medline TA:  Cancer Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
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