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神经相关基因启动子的高甲基化与实体瘤中的干性是兼容的。

Promoter hypermethylation of neural-related genes is compatible with stemness in solid cancers.

机构信息

Department of Pathology, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre, P.O. Box 616, 6229 HX, Maastricht, The Netherlands.

Department of Clinical Genetics, Erasmus University Medical Center-Sophia Children's Hospital, 3015 GD, Rotterdam, The Netherlands.

出版信息

Epigenetics Chromatin. 2023 Aug 3;16(1):31. doi: 10.1186/s13072-023-00505-7.

DOI:10.1186/s13072-023-00505-7
PMID:37537688
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10398991/
Abstract

BACKGROUND

DNA hypermethylation is an epigenetic feature that modulates gene expression, and its deregulation is observed in cancer. Previously, we identified a neural-related DNA hypermethylation fingerprint in colon cancer, where most of the top hypermethylated and downregulated genes have known functions in the nervous system. To evaluate the presence of this signature and its relevance to carcinogenesis in general, we considered 16 solid cancer types available in The Cancer Genome Atlas (TCGA).

RESULTS

All tested cancers showed significant enrichment for neural-related genes amongst hypermethylated genes. This signature was already present in two premalignant tissue types and could not be explained by potential confounders such as bivalency status or tumor purity. Further characterization of the neural-related DNA hypermethylation signature in colon cancer showed particular enrichment for genes that are overexpressed during neural differentiation. Lastly, an analysis of upstream regulators identified RE1-Silencing Transcription factor (REST) as a potential mediator of this DNA methylation signature.

CONCLUSION

Our study confirms the presence of a neural-related DNA hypermethylation fingerprint in various cancers, of genes linked to neural differentiation, and points to REST as a possible regulator of this mechanism. We propose that this fingerprint indicates an involvement of DNA hypermethylation in the preservation of neural stemness in cancer cells.

摘要

背景

DNA 超甲基化是一种调节基因表达的表观遗传特征,其失调在癌症中观察到。此前,我们在结肠癌中鉴定出一种与神经相关的 DNA 超甲基化特征,其中大多数上调和下调的基因在神经系统中具有已知的功能。为了评估这种特征的存在及其与一般癌症发生的相关性,我们考虑了癌症基因组图谱(TCGA)中可用的 16 种实体癌类型。

结果

所有测试的癌症在超甲基化基因中都表现出明显的神经相关基因富集。这种特征已经存在于两种癌前组织类型中,并且不能用潜在的混杂因素(如二价状态或肿瘤纯度)来解释。对结肠癌中与神经相关的 DNA 超甲基化特征的进一步表征表明,该特征特别富集了在神经分化过程中过度表达的基因。最后,对上游调节剂的分析表明,RE1-沉默转录因子(REST)可能是这种 DNA 甲基化特征的介导因子。

结论

我们的研究证实了各种癌症中存在与神经分化相关的基因的与神经相关的 DNA 超甲基化特征指纹,并指出 REST 可能是这种机制的调节因子。我们提出,这种特征指纹表明 DNA 超甲基化参与了癌细胞中神经干细胞的维持。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/87c2e309ecc5/13072_2023_505_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/fa3285e7b3ba/13072_2023_505_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/032718fd13eb/13072_2023_505_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/1916d2c6b51d/13072_2023_505_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/c0bc5643940a/13072_2023_505_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/87c2e309ecc5/13072_2023_505_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/fa3285e7b3ba/13072_2023_505_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/032718fd13eb/13072_2023_505_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/1916d2c6b51d/13072_2023_505_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/c0bc5643940a/13072_2023_505_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bdcd/10398991/87c2e309ecc5/13072_2023_505_Fig5_HTML.jpg

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