Chromatin states responsible for the regulation of differentially expressed genes under Co-60 similar to gamma ray radiation in rice

文献类型： 外文期刊

第一作者： Pan, Xiucai

作者： Pan, Xiucai;Fang, Yuan;Zheng, Dongyang;Chen, Lifen;Wang, Lei;Xiao, Jin;Wang, Xiu-e;Zhang, Wenli;Yang, Xueming;Wang, Kai;Cheng, Zhukuan;Cheng, Zhukuan;Yu, Hengxiu;Zhang, Wenli

作者机构：

关键词： Gene expression;Histone modifications;Chromatin states;Ionizing radiation;Oryza sativa

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2017 年 18 卷

页码：

收录情况： SCI

摘要： Background: The role of histone modifications in the DNA damage response has been extensively studied in non-plant systems, including mammals and yeast. However, there is a lack of detailed evidence showing how chromatin dynamics, either an individual mark or combined chromatin states, participate in regulating differentially expressed genes in the plant DNA damage response. Results: In this study, we used RNA-seq and ChIP-seq to show that differentially expressed genes (DEGs), in response to ionizing radiation (IR), might be involved in different pathways responsible for the DNA damage response. Moreover, chromatin structures associated with promoters, exons and intergenic regions are significantly affected by IR. Most importantly, either an individual mark or a certain chromatin state was found to be highly correlated with the expression of up-regulated genes. In contrast, only the chromatin states, as opposed to any individual marks tested, are related to the expression of the down-regulated genes. Conclusions: Our findings demonstrate that IR-related DEGs are modulated by distinct epigenetic mechanisms. Either chromatin states or distinct histone dynamics may act sequentially or in combination in regulating up-regulated genes, but the complex chromatin structure is mainly responsible for the expression of down-regulated genes. Thus, this study provides new insights into how up- and down-regulated genes are epigenetically regulated at the chromatin levels, thereby helping us to understand distinct epigenetic mechanisms that function in the plant DNA damage response.

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