Cited 0 times in

ABCD2 Is a Direct Target of β-Catenin and TCF-4: Implications for X-Linked Adrenoleukodystrophy Therapy

Authors
 Chul-Yong Park ; Han-Soo Kim ; Dong-Wook Kim ; Dongjin R. Lee ; Jeong-Eun Yoo ; Jae Souk Lee ; Hyunji Lee ; Jiho Jang 
Citation
 PLoS One, Vol.8(2) : e56242, 2013 
Journal Title
 PLoS One 
ISSN
 1932-6203 
Issue Date
2013
Abstract
X-linked adrenoleukodystrophy (X-ALD) is a peroxisomal disorder caused by mutations in the ABCD1 gene that encodes the peroxisomal ATP-binding cassette (ABC) transporter subfamily D member 1 protein (ABCD1), which is referred to as the adrenoleukodystrophy protein (ALDP). Induction of the ABCD2 gene, the closest homolog of ABCD1, has been mentioned as a possible therapeutic option for the defective ABCD1 protein in X-ALD. However, little is known about the transcriptional regulation of ABCD2 gene expression. Here, through in silico analysis, we found two putative TCF-4 binding elements between nucleotide positions −360 and −260 of the promoter region of the ABCD2 gene. The transcriptional activity of the ABCD2 promoter was strongly increased by ectopic expression of β-catenin and TCF-4. In addition, mutation of either or both TCF-4 binding elements by site-directed mutagenesis decreased promoter activity. This was further validated by the finding that β-catenin and the promoter of the ABCD2 gene were pulled down with a β-catenin antibody in a chromatin immunoprecipitation assay. Moreover, real-time PCR analysis revealed that β-catenin and TCF-4 increased mRNA levels of ABCD2 in both a hepatocellular carcinoma cell line and primary fibroblasts from an X-ALD patient. Interestingly, we found that the levels of very long chain fatty acids were decreased by ectopic expression of ABCD2-GFP as well as β-catenin and TCF-4. Taken together, our results demonstrate for the first time the direct regulation of ABCD2 by β-catenin and TCF-4.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/88164
DOI
10.1371/journal.pone.0056242
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Laboratory Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Physiology
1. 연구논문 > 1. College of Medicine > Dept. of Life Science
1. 연구논문 > 1. College of Medicine > Yonsei Biomedical Research Center
Yonsei Authors
사서에게 알리기
  feedback
Files in This Item:
T201303554.pdfDownload
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse