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Pigment Cell & Melanoma Research
Article . 2010 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
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Silencing and re‐expression of retinoic acid receptor beta2 in human melanoma

Authors: Jun, Fan; Linda, Eastham; Melinda E, Varney; Adam, Hall; Nicolas L, Adkins; Lora, Chetel; Vincent E, Sollars; +2 Authors

Silencing and re‐expression of retinoic acid receptor beta2 in human melanoma

Abstract

SummaryMany melanoma cells are resistant to the anti‐proliferative effect of all trans retinoic acid (ATRA). Retinoic Acid Receptor‐β2 (RAR‐β2) mediates the ATRA growth inhibition. We found a correlation between the anti‐proliferative activity of ATRA and expression of RAR‐β2. There was not a strict correlation between DNA methylation of RAR‐β gene and its expression. There was no difference in global and RARβ specific nucleosome repeat length (NRL) in melanoma and melanocytes or between control and ATRA treated cells. Pan‐acetylation of H3 and H4 within the RAR‐β gene promoter was higher in cells expressing RAR‐β2. All trans retinoic acid treatment of responsive cells did not change pan‐acetylation of H3/H4, but addition of ATRA to non‐responsive cells increased H4 pan‐acetylation. Phytochemicals or the histone deacetylase inhibitor Trichostatin A did not restore expression of RAR‐β2. Treatment of WM1366 melanoma cells with 5‐aza 2′‐deoxycytidine reactivated RAR‐β2 gene expression and restored the ability of ATRA to further induce the expression of this gene. Therefore, promoter methylation is responsible for silencing of RAR‐β2 in some melanoma cells and pan‐acetylation of H3 likely plays a permissive role in expression of RAR‐β2.

Related Organizations
Keywords

Chromatin Immunoprecipitation, Skin Neoplasms, Receptors, Retinoic Acid, Acetylation, Tretinoin, DNA Methylation, Nucleosomes, Gene Expression Regulation, Neoplastic, Histones, Cell Line, Tumor, Disease Progression, Humans, Melanocytes, Gene Silencing, RNA, Messenger, Promoter Regions, Genetic, Melanoma, Protein Processing, Post-Translational, Cell Proliferation

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
20
Average
Top 10%
Top 10%
bronze