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组蛋白H3K27me3沉默子重塑上调胃黏膜高级别上皮内瘤变磷酸甘油醛激酶1表达
Remodeling of histone H3K27me3-associated silencers upregulates PGK1 expression in gastric high-grade intraepithelial neoplasia
- 陆军军医大学学报 2024年46卷第6期 页码：597-607
- 作者机构：
1.400715 重庆，西南大学医学研究院
2.400042 重庆，陆军军医大学陆军特色医学中心(大坪医院)消化内科，消化系统肿瘤精准防治重庆市重点实验室
3.400044 重庆，重庆大学医学院
- 作者简介：
[吴林育，E-mail: wly17750176828@163.comWU Linyu, E-mail: wly17750176828@163.com
[王斌，E-mail: wb_tmmu@126.comWANG Bin, E-mail: wb_tmmu@126.com
- 基金信息：国家自然科学基金优秀青年科学项目(81822032);国家自然科学基金资助项目(91959111);国家自然科学基金资助项目(81872027);重庆市自然科学基金杰出青年项目(CSTC2019JCYJJQX0027);重庆市自然科学基金项目(cstc2021jcyj-msxmX0340);利益冲突 所有作者均声明不存在利益冲突;作者贡献声明 秦苾珺：生物样本建库、论文撰写；谭玉婷：数据分析；储召乐、刘碧颖：生物样本建库；王涛、李先锋：课题指导、论文修改；陈东风、崔红娟：课题指导；吴林育：课题指导、论文修改；王斌：课题指导、经费支持、论文修改与审核
DOI：10.16016/j.2097-0927.202310001
中图分类号： R394.3;R730.23;R735.2收稿：2023-10-01，
修回：2024-01-15，
纸质出版：2024-03-30
- 稿件说明：
移动端阅览
秦苾珺, 谭玉婷, 储召乐, 等. 组蛋白H3K27me3沉默子重塑上调胃黏膜高级别上皮内瘤变磷酸甘油醛激酶1表达[J]. 陆军军医大学学报, 2024,46(6):597-607.
Bijun QIN, Yuting TAN, Zhaole CHU, et al. Remodeling of histone H3K27me3-associated silencers upregulates PGK1 expression in gastric high-grade intraepithelial neoplasia[J]. Journal of Army Medical University, 2024, 46(6): 597-607.
秦苾珺, 谭玉婷, 储召乐, 等. 组蛋白H3K27me3沉默子重塑上调胃黏膜高级别上皮内瘤变磷酸甘油醛激酶1表达[J]. 陆军军医大学学报, 2024,46(6):597-607. DOI： 10.16016/j.2097-0927.202310001.
Bijun QIN, Yuting TAN, Zhaole CHU, et al. Remodeling of histone H3K27me3-associated silencers upregulates PGK1 expression in gastric high-grade intraepithelial neoplasia[J]. Journal of Army Medical University, 2024, 46(6): 597-607. DOI： 10.16016/j.2097-0927.202310001.
摘要
目的
2
绘制胃黏膜高级别上皮内瘤变(High-Grade Intraepithelial Neoplasia
HGIN)组织的组蛋白H3K27me3沉默子图谱，寻找沉默子调控的重要靶基因。
方法
2
从本院内镜中心收集HGIN与正常胃黏膜组织各24例，采用H3K27me3染色体靶向切割和标签化(Cleavage Under Target & Tagmentation
CUT&Tag)测序技术捕获基因组修饰区域。通过生物信息学分析比较两类组织的沉默子信号特征以及差异；整合RNA测序数据及高通量染色体构象捕获技术(Hi-C)公共数据，分析沉默子重塑调控的靶基因及调控的潜在生物学过程。
结果
2
与正常胃黏膜相比，HGIN组织H3K27me3修饰数量减少，信号强度全局性降低，呈现H3K27me3信号峰重塑现象；转录组差异分析结果显示，与正常胃黏膜组织相比，HGIN共有8 887个差异表达基因，其中表达上调基因4 335个，表达下调基因4 552个，其中CTNNB1等肿瘤发生相关基因显著上调；整合分析表观组学和转录组学数据，发现沉默子丢失可能在转录水平上调氨基酸生物合成、精氨酸与脯氨酸代谢和糖酵解等关键代谢基因，如糖酵解关键酶磷酸甘油醛激酶1(phosphoglycerate kinase1，PGK1)表达，进而促进胃黏膜上皮内瘤变。
结论
2
组蛋白H3K27me3沉默子信号丢失是HGIN表观重塑特征之一，沉默子丢失可能与PGK1等糖酵解和氨基酸代谢基因表达紊乱相关。
Abstract
Objective
2
To characterize the silencers in genomic loci that were labeled by H3K37me3 modification in gastric high-grade intraepithelial neoplasia (HGIN) tissues
and identify their key downstream genes.
Methods
2
Gastric mucosa were collected from 48 donors
including 24 patients with HGIN and 24 healthy controls who underwent dndoscopic biopsy or endoscopic gastric mucosal dissection in our hospital. Genomic distribution of histone H3K27me3 modification was retrieved by targeted chromosome Cleavage Under Target & Tagmentation (CUT&Tag) sequencing. Bioinformatics analysis tools were used to compare the characteristics and differences of the silencer signals between the 2 types of tissues. The RNA sequencing data and the public high-through chromosome conformation capture (Hi-C) data were integrated to analyze the target genes regulated by silencer remodeling and their potential biological processes.
Results
2
Compared with normal gastric mucosal tissue
the number of H3K27me3 modifications and signal intensity in HGIN tissues were significantly reduced
which was manifested by global remodeling of H3K27me3 signals. High-throughput RNA sequencing and bioinformatics analysis showed that there were a total of 8 887 differentially expressed genes for HGIN tissues
including 4 335 up-regulated genes and 4 552 down-regulated ones
and among them
CTNNB1 and other oncogenes were significantly up-regulated. Integrated analysis of epigenomics and transcriptomics data reveled that extensive remodeling of silencers in HGIN. Loss of silencer may regulate the expression of metabolic genes related to amino acid biosynthesis
arginine and proline metabolism and glycolysis at the transcriptional level
such as phosphoglycerate kinase 1 (PGK1)
which may promote development of gastric precancerous lesions.
Conclusion
2
Global remodeling of silencers
namely loss of H3K27me3 modification
is an epigenomic characteristics of HGIN tissue
which may lead to expression dysregulation of glycolysis and amino acid metabolism regulators
such as PGK1.
关键词
Keywords
references
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