5-Carboxylcytosine is localized to euchromatic regions in the nuclei of follicular cells in axolotl ovary.

5-Carboxylcytosine is localized to euchromatic regions in the nuclei of follicular cells in axolotl ovary.
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DOI:
10.4161/nucl.22799
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发表时间:
2012-11
期刊:
Nucleus (Austin, Tex.)
影响因子:
--
通讯作者:
Ruzov A
Ruzov A
中科院分区:
其他
文献类型:
--
作者:
Alioui A;Wheldon LM;Abakir A;Ferjentsik Z;Johnson AD;Ruzov A

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5-甲基胞嘧啶(5-MC)是一种与基因抑制相关的表观遗传修饰。最近的研究表明,5-MC可以被酶氧化成5-羟甲基胞嘧啶,进而生成5-甲酰胞嘧啶(5-FC)和5-羧基胞嘧啶(5-CAC)。在胚胎干细胞和小鼠着床前胚胎中已经发现了5-CAC,但到目前为止还没有报道在体细胞组织中检测到这种修饰的水平。虽然有人认为5-CAC可以作为主动去甲基化过程中的中间体,但这种形式的修饰胞嘧啶的功能仍然不清楚。在这里,我们发现5-CAC可免疫化学检测到在无性系卵巢的体细胞中。我们证明5-HMC和5-CAC都定位于Axolotl滤泡细胞核内的常染色质,具有相似的空间分布模式。我们的结果表明,5-羧基胞嘧啶可能在某些生物环境中发挥着不同的功能作用。
5-Methylcytosine (5-mC) is an epigenetic modification associated with gene repression. Recent studies demonstrated that 5-mC can be enzymatically oxidised into 5-hydroxymethylcytosine and further into 5-formylcytosine (5-fC) and 5-carboxylcytsine (5-caC). 5-caC has been found in embryonic stem cells and in mouse pre-implantation embryos but no detectable levels of this modification have been reported for somatic tissues to date. Whereas it has been suggested that 5-caC can serve as an intermediate in the process of active demethylation, the function of this form of modified cytosine remains obscure. Here we show that 5-caC is immunochemically detectable in somatic cells of axolotl ovary. We demonstrate that both 5-hmC and 5-caC are localized to the euchromatin in the nuclei of axolotl follicular cells with similar patterns of spatial distribution. Our results suggest that 5-carboxylcytosine may play a distinct functional role in certain biological contexts.
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