1
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Gumińska N, Hałakuc P, Zakryś B, Milanowski R. Circular extrachromosomal DNA in Euglena gracilis under normal and stress conditions. Protist 2024; 175:126033. [PMID: 38574508 DOI: 10.1016/j.protis.2024.126033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/10/2024] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
Extrachromosomal circular DNA (eccDNA) enhances genomic plasticity, augmenting its coding and regulatory potential. Advances in high-throughput sequencing have enabled the investigation of these structural variants. Although eccDNAs have been investigated in numerous taxa, they remained understudied in euglenids. Therefore, we examined eccDNAs predicted from Illumina sequencing data of Euglena gracilis Z SAG 1224-5/25, grown under optimal photoperiod and exposed to UV irradiation. We identified approximately 1000 unique eccDNA candidates, about 20% of which were shared across conditions. We also observed a significant enrichment of mitochondrially encoded eccDNA in the UV-irradiated sample. Furthermore, we found that the heterogeneity of eccDNA was reduced in UV-exposed samples compared to cells that were grown in optimal conditions. Hence, eccDNA appears to play a role in the response to oxidative stress in Euglena, as it does in other studied organisms. In addition to contributing to the understanding of Euglena genomes, our results contribute to the validation of bioinformatics pipelines on a large, non-model genome.
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Affiliation(s)
- Natalia Gumińska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, 101 Żwirki i Wigury Street, 02-089 Warsaw, Poland; Laboratory of RNA Biology, International Institute of Molecular and Cell Biology in Warsaw, 4 Ks. Trojdena Street, 02-109 Warsaw, Poland.
| | - Paweł Hałakuc
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, 101 Żwirki i Wigury Street, 02-089 Warsaw, Poland
| | - Bożena Zakryś
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, 101 Żwirki i Wigury Street, 02-089 Warsaw, Poland
| | - Rafał Milanowski
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, 101 Żwirki i Wigury Street, 02-089 Warsaw, Poland.
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2
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Liu J, L Y, Li F, Zhang X, Wang Y, Zhou J. Landscape of extrachromosomal circular DNAs, transcriptome, and proteome analysis reveals insights into alcoholic liver cirrhosis. Gene 2024:148599. [PMID: 38782221 DOI: 10.1016/j.gene.2024.148599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 05/09/2024] [Accepted: 05/20/2024] [Indexed: 05/25/2024]
Abstract
Alcoholic liver cirrhosis (ALC) is a result of excessive and chronic alcohol consumption. Because alchol can cause DNA damage, extrachromosomal circular DNA (eccDNA) was investigated in ALC liver due to it can be a result of DNA damage. Considering eccDNA has ability to lead to genomic instability as an enhancer of gene transcription, we utilized Circle-Seq to identify differences in eccDNA profiles and gene expression patterns in liver samples obtained from ALC patients (n = 3) and healthy controls (n = 3) to investigate the role of eccDNA in the development of ALC. The abundance of eccDNA in ALC (mean = 13,349) were higher than the healthy control (mean = 11,557) without significant difference (pvalue = 0.6530). We observed 1,032 eccDNA containing genes showed higher expression in ALC patients compared to healthy controls (p < 0.05, log2FC > 1). Notably, we discovered seven genes that exhibited a significant positive correlation between eccDNA abundance and gene expression levels. These genes include A disintegrin and metalloproteinase with thrombospondin motifs 2 (ADAMTS2), Voltage-dependent L-type calcium channel subunit alpha-1C (CACNA1C), Protein TANC1 (TANC1), Integrin alpha-2 (ITGA2), EH domain-containing protein 4 (EHD4), Phosphofurin acidic cluster sorting protein 1 (PACS1), and Neuron navigator 2 (NAV2). Through mass spectrometry proteomics, ITGA2 were found to have significantly higher abbudance in ALC. Integrins are a family of proteins plays key roles in the fibrosis development of liver. Thus, our study opens a new perspective for liver fibrosis development.
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Affiliation(s)
- Jingwen Liu
- Department of Infectious Disease, The Third Hospital of Hebei Medical University, Shi jia Zhuang 050051, China; Department of Infectious Diseases, Baoding No.1 Central Hospital, Baoding, Hebei 071000, China
| | - Yuanyuan L
- Department of Infectious Disease, The Third Hospital of Hebei Medical University, Shi jia Zhuang 050051, China
| | - Fei Li
- Department of Pediatrics, Baoding No.1 Central Hospital, Baoding, Hebei 071000, China
| | - Xin Zhang
- Department of Tuberculosis, The Fifth Hospital of Shijiazhuang, Hebei Medical University, Shijiazhuang 050021, China
| | - Yadong Wang
- Department of Infectious Disease, The Third Hospital of Hebei Medical University, Shi jia Zhuang 050051, China
| | - Junying Zhou
- Department of Infectious Disease, The Third Hospital of Hebei Medical University, Shi jia Zhuang 050051, China.
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3
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Zhou L, Tang W, Ye B, Zou L. Characterization, biogenesis model, and current bioinformatics of human extrachromosomal circular DNA. Front Genet 2024; 15:1385150. [PMID: 38746056 PMCID: PMC11092383 DOI: 10.3389/fgene.2024.1385150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Accepted: 04/12/2024] [Indexed: 05/16/2024] Open
Abstract
Human extrachromosomal circular DNA, or eccDNA, has been the topic of extensive investigation in the last decade due to its prominent regulatory role in the development of disorders including cancer. With the rapid advancement of experimental, sequencing and computational technology, millions of eccDNA records are now accessible. Unfortunately, the literature and databases only provide snippets of this information, preventing us from fully understanding eccDNAs. Researchers frequently struggle with the process of selecting algorithms and tools to examine eccDNAs of interest. To explain the underlying formation mechanisms of the five basic classes of eccDNAs, we categorized their characteristics and functions and summarized eight biogenesis theories. Most significantly, we created a clear procedure to help in the selection of suitable techniques and tools and thoroughly examined the most recent experimental and bioinformatics methodologies and data resources for identifying, measuring and analyzing eccDNA sequences. In conclusion, we highlighted the current obstacles and prospective paths for eccDNA research, specifically discussing their probable uses in molecular diagnostics and clinical prediction, with an emphasis on the potential contribution of novel computational strategies.
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Affiliation(s)
- Lina Zhou
- School of Medicine, Chongqing University, Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing University, Chongqing, China
| | - Wenyi Tang
- School of Medicine, Chongqing University, Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing University, Chongqing, China
| | - Bo Ye
- School of Medicine, Chongqing University, Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing University, Chongqing, China
| | - Lingyun Zou
- School of Medicine, Chongqing University, Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing University Central Hospital, Chongqing University, Chongqing, China
- School of Medicine, Jinan University, Guangzhou, Guangdong, China
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4
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Li Z, Qian D. Extrachromosomal circular DNA (eccDNA): from carcinogenesis to drug resistance. Clin Exp Med 2024; 24:83. [PMID: 38662139 PMCID: PMC11045593 DOI: 10.1007/s10238-024-01348-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 04/03/2024] [Indexed: 04/26/2024]
Abstract
Extrachromosomal circular DNA (eccDNA) is a circular form of DNA that exists outside of the chromosome. Although it has only been a few decades since its discovery, in recent years, it has been found to have a close relationship with cancer, which has attracted widespread attention from researchers. Thus far, under the persistent research of researchers from all over the world, eccDNA has been found to play an important role in a variety of tumors, including breast cancer, lung cancer, ovarian cancer, etc. Herein, we review the sources of eccDNA, classifications, and the mechanisms responsible for their biogenesis. In addition, we introduce the relationship between eccDNA and various cancers and the role of eccDNA in the generation and evolution of cancer. Finally, we summarize the research significance and importance of eccDNA in cancer, and highlight new prospects for the application of eccDNA in the future detection and treatment of cancer.
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Affiliation(s)
- Zhaoxing Li
- Department of Hepatobiliary Surgery, Yijishan Hospital of Wannan Medical College, Wuhu, China
| | - Daohai Qian
- Department of Hepatobiliary Surgery, Yijishan Hospital of Wannan Medical College, Wuhu, China.
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Petito V, Di Vincenzo F, Putignani L, Abreu MT, Regenberg B, Gasbarrini A, Scaldaferri F. Extrachromosomal Circular DNA: An Emerging Potential Biomarker for Inflammatory Bowel Diseases? Genes (Basel) 2024; 15:414. [PMID: 38674347 PMCID: PMC11049804 DOI: 10.3390/genes15040414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/15/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
Inflammatory bowel disease (IBD) comprising ulcerative colitis and Crohn's disease is a chronic immune-mediated disease which affects the gastrointestinal tract with a relapsing and remitting course, causing lifelong morbidity. IBD pathogenesis is determined by multiple factors including genetics, immune and microbial factors, and environmental factors. Although therapy options are expanding, remission rates are unsatisfiable, and together with the disease course, response to therapy remains unpredictable. Therefore, the identification of biomarkers that are predictive for the disease course and response to therapy is a significant challenge. Extrachromosomal circular DNA (eccDNA) fragments exist in all tissue tested so far. These fragments, ranging in length from a few hundreds of base pairs to mega base pairs, have recently gained more interest due to technological advances. Until now, eccDNA has mainly been studied in relation to cancer due to its ability to act as an amplification site for oncogenes and drug resistance genes. However, eccDNA could also play an important role in inflammation, expressed both locally in the- involved tissue and at distant sites. Here, we review the current evidence on the molecular mechanisms of eccDNA and its role in inflammation and IBD. Additionally, the potential of eccDNA as a tissue or plasma marker for disease severity and/or response to therapy is evaluated.
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Affiliation(s)
- Valentina Petito
- Digestive Disease Center-CEMAD, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Federica Di Vincenzo
- Digestive Disease Center-CEMAD, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Lorenza Putignani
- UOS Microbiomica, UOC Microbiologia e Diagnostica di Immunologia, Dipartimento di Medicina Diagnostica e di Laboratorio, Ospedale Pediatrico “Bambino Gesù” IRCCS, 00146 Rome, Italy
| | - Maria T. Abreu
- Division of Gastroenterology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Birgitte Regenberg
- Department of Biology, Section for Ecology and Evolution, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Antonio Gasbarrini
- Digestive Disease Center-CEMAD, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Franco Scaldaferri
- Digestive Disease Center-CEMAD, Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario Gemelli IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
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6
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Zhuang J, Zhang Y, Zhou C, Fan D, Huang T, Feng Q, Lu Y, Zhao Y, Zhao Q, Han B, Lu T. Dynamics of extrachromosomal circular DNA in rice. Nat Commun 2024; 15:2413. [PMID: 38499575 PMCID: PMC10948907 DOI: 10.1038/s41467-024-46691-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 03/06/2024] [Indexed: 03/20/2024] Open
Abstract
The genome's dynamic nature, exemplified by elements like extrachromosomal circular DNA (eccDNA), is crucial for biodiversity and adaptation. Yet, the role of eccDNA in plants, particularly rice, remains underexplored. Here, we identify 25,598 eccDNAs, unveiling the widespread presence of eccDNA across six rice tissues and revealing its formation as a universal and random process. Interestingly, we discover that direct repeats play a pivotal role in eccDNA formation, pointing to a unique origin mechanism. Despite eccDNA's prevalence in coding sequences, its impact on gene expression is minimal, implying its roles beyond gene regulation. We also observe the association between eccDNA's formation and minor chromosomal deletions, providing insights of its possible function in regulating genome stability. Further, we discover eccDNA specifically accumulated in rice leaves, which may be associated with DNA damage caused by environmental stressors like intense light. In summary, our research advances understanding of eccDNA's role in the genomic architecture and offers valuable insights for rice cultivation and breeding.
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Affiliation(s)
- Jundong Zhuang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Yaoxin Zhang
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
- University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Congcong Zhou
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Danlin Fan
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Tao Huang
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Qi Feng
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yiqi Lu
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yan Zhao
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Qiang Zhao
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Bin Han
- National Center for Gene Research, National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai, 200032, China.
| | - Tingting Lu
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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7
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Li D, Qian X, Wang Y, Yin Y, Sun H, Zhao H, Wu J, Qiu L. Molecular characterization and functional roles of circulating cell-free extrachromosomal circular DNA. Clin Chim Acta 2024; 556:117822. [PMID: 38325714 DOI: 10.1016/j.cca.2024.117822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 02/09/2024]
Abstract
Circular DNA segments isolated from chromosomes are known as extrachromosomal circular DNA (eccDNA). Its distinct structure and characteristics, along with the variations observed in different disease states, makes it a promising biomarker. Recent studies have revealed the presence of eccDNAs in body fluids, indicating their involvement in various biological functions. This finding opens up avenues for utilizing eccDNAs as convenient and real-time biomarkers for disease diagnosis, treatment monitoring, and prognosis assessment through noninvasive analysis of body fluids. In this comprehensive review, we focused on elucidating the size profiles, potential mechanisms of formation and clearance, detection methods, and potential clinical applications of eccDNAs. We aimed to provide a valuable reference resource for future research in this field.
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Affiliation(s)
- Dandan Li
- Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China
| | - Xia Qian
- Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China
| | - Yingjie Wang
- Department of Orthopedic Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China
| | - Yicong Yin
- Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China
| | - Huishan Sun
- Department of Liver Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China
| | - Haitao Zhao
- Department of Liver Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China.
| | - Jie Wu
- Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China.
| | - Ling Qiu
- Department of Laboratory Medicine, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College (CAMS & PUMC), Beijing 100730, China.
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8
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Wu N, Wei L, Zhu Z, Liu Q, Li K, Mao F, Qiao J, Zhao X. Innovative insights into extrachromosomal circular DNAs in gynecologic tumors and reproduction. Protein Cell 2024; 15:6-20. [PMID: 37233789 PMCID: PMC10762679 DOI: 10.1093/procel/pwad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 05/03/2023] [Indexed: 05/27/2023] Open
Abstract
Originating but free from chromosomal DNA, extrachromosomal circular DNAs (eccDNAs) are organized in circular form and have long been found in unicellular and multicellular eukaryotes. Their biogenesis and function are poorly understood as they are characterized by sequence homology with linear DNA, for which few detection methods are available. Recent advances in high-throughput sequencing technologies have revealed that eccDNAs play crucial roles in tumor formation, evolution, and drug resistance as well as aging, genomic diversity, and other biological processes, bringing it back to the research hotspot. Several mechanisms of eccDNA formation have been proposed, including the breakage-fusion-bridge (BFB) and translocation-deletion-amplification models. Gynecologic tumors and disorders of embryonic and fetal development are major threats to human reproductive health. The roles of eccDNAs in these pathological processes have been partially elucidated since the first discovery of eccDNA in pig sperm and the double minutes in ovarian cancer ascites. The present review summarized the research history, biogenesis, and currently available detection and analytical methods for eccDNAs and clarified their functions in gynecologic tumors and reproduction. We also proposed the application of eccDNAs as drug targets and liquid biopsy markers for prenatal diagnosis and the early detection, prognosis, and treatment of gynecologic tumors. This review lays theoretical foundations for future investigations into the complex regulatory networks of eccDNAs in vital physiological and pathological processes.
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Affiliation(s)
- Ning Wu
- State Key Laboratory of Female Fertility Promotion, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
| | - Ling Wei
- Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing 100191, China
- Cancer Center, Peking University Third Hospital, Beijing 100191, China
| | - Zhipeng Zhu
- Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing 100191, China
- Cancer Center, Peking University Third Hospital, Beijing 100191, China
| | - Qiang Liu
- State Key Laboratory of Female Fertility Promotion, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
| | - Kailong Li
- Department of Biochemistry and Biophysics, Beijing Key Laboratory of Protein Posttranslational Modifications and Cell Function, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Fengbiao Mao
- Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing 100191, China
- Cancer Center, Peking University Third Hospital, Beijing 100191, China
| | - Jie Qiao
- State Key Laboratory of Female Fertility Promotion, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
- Beijing Advanced Innovation Center for Genomics, Beijing 100191, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100191, China
| | - Xiaolu Zhao
- State Key Laboratory of Female Fertility Promotion, Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Peking University Third Hospital, Beijing 100191, China
- National Clinical Research Center for Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
- Key Laboratory of Assisted Reproduction (Peking University), Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing 100191, China
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9
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Andrisani O. Two important players in poor-prognosis hepatocellular carcinoma: Extrachromosomal circular DNA (eccDNA) and its passenger, the oncogenic miR-17~92 locus. Hepatology 2024; 79:6-8. [PMID: 37183875 DOI: 10.1097/hep.0000000000000453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/16/2023]
Affiliation(s)
- Ourania Andrisani
- Department of Basic Medical Sciences and Purdue Institute for Cancer Research, Purdue University, West Lafayette, Indiana, USA
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10
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Zhu Q, Chen R, Kuang M, Zhang W, Wang D, Han S. Identification and characterization of extrachromosomal circular DNA in age-related osteoporosis. Aging (Albany NY) 2023; 15:15489-15503. [PMID: 38159253 PMCID: PMC10781488 DOI: 10.18632/aging.205388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/06/2023] [Indexed: 01/03/2024]
Abstract
Extrachromosomal circular DNA (eccDNA) was once thought to mainly exist in tumour cells, although it was later shown to be ubiquitous in healthy tissues as well. However, the characteristics and properties of eccDNA in healthy tissue or non-cancer tissue are not well understood. This study first analyses the properties, possible formation mechanisms and potential functions of eccDNA in osteoporotic or normal bone tissue. We used circle-seq to demonstrate the expression spectrum of the eccDNA in the bone tissue. A bioinformatics analysis was performed for the differentially expressed eccDNA, and it enriched the Hippo signalling pathway, PI3K-Akt signalling pathway, Ras signal-ling pathway and other signalling pathways that are closely related to osteoporosis (OP). Then, we used real-time polymerase chain reaction and Sanger sequencing to assess human bone marrow mesenchymal stem cells and obtained the base sequence of the eccDNA cyclization site. Overall, eccDNAs in bone tissue are common and may play a significant role in pathways connected to age-related osteoporosis progression.
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Affiliation(s)
- Qingrun Zhu
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, Shandong, China
| | - Rudong Chen
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, Shandong, China
| | - Mingjie Kuang
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250014, Shandong, China
| | - Wen Zhang
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, Shandong, China
| | - Dachuan Wang
- Department of Orthopedics, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250033, Shandong, China
| | - Shijie Han
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250014, Shandong, China
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11
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Lu W, Li F, Ouyang Y, Jiang Y, Zhang W, Bai Y. A comprehensive analysis of library preparation methods shows high heterogeneity of extrachromosomal circular DNA but distinct chromosomal amount levels reflecting different cell states. Analyst 2023; 149:148-160. [PMID: 37987554 DOI: 10.1039/d3an01300f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Extrachromosomal circular DNA (eccDNA) was discovered several decades ago, but little is known about its function. With the development of sequencing technology, several library preparation methods have been developed to elucidate the biogenesis and function of eccDNA. However, different treatment methods have certain biases that can lead to their erroneous interpretation. To address these issues, we compared the performance of different library preparation methods. Our investigation revealed that the utilization of rolling-circle amplification (RCA) and restriction enzyme linearization of mitochondrial DNA (mtDNA) significantly enhanced the efficiency of enriching extrachromosomal circular DNA (eccDNA). However, it also introduced certain biases, such as an unclear peak in ∼160-200 bp periodicity and the absence of a typical motif pattern. Furthermore, given that RCA can lead to a disproportionate change in copy numbers, eccDNA quantification using split and discordant reads should be avoided. Analysis of the genomic and elements distribution of the overall population of eccDNA molecules revealed a high correlation between the replicates, and provided a possible stability signature for eccDNA, which could potentially reflect different cell lines or cell states. However, we found only a few eccDNA with identical junction sites in each replicate, showing a high degree of heterogeneity of eccDNA. The emergence of different motif patterns flanking junctional sites in eccDNAs of varying sizes suggests the involvement of multiple potential mechanisms in eccDNA generation. This study comprehensively compares and discusses various essential approaches for eccDNA library preparation, offering valuable insights and practical advice to researchers involved in characterizing eccDNA.
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Affiliation(s)
- Wenxiang Lu
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, 210096, China.
| | - Fuyu Li
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, 210096, China.
| | - Yunfei Ouyang
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, 210096, China.
| | - Yali Jiang
- The Friendship Hospital of Ili Kazakh Autonomous Prefecture, Ili & Jiangsu Joint Institute of Health, Yining, Xinjiang Uygur Autonomous Region, 835000, China
| | - Weizhong Zhang
- Department of Ophthalmology, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210029, China
| | - Yunfei Bai
- State Key Laboratory of Digital Medical Engineering, School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, 210096, China.
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12
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Smalheiser NR. Mobile circular DNAs regulating memory and communication in CNS neurons. Front Mol Neurosci 2023; 16:1304667. [PMID: 38125007 PMCID: PMC10730651 DOI: 10.3389/fnmol.2023.1304667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 11/14/2023] [Indexed: 12/23/2023] Open
Abstract
Stimuli that stimulate neurons elicit transcription of immediate-early genes, a process which requires local sites of chromosomal DNA to form double-strand breaks (DSBs) generated by topoisomerase IIb within a few minutes, followed by repair within a few hours. Wakefulness, exploring a novel environment, and contextual fear conditioning also elicit turn-on of synaptic genes requiring DSBs and repair. It has been reported (in non-neuronal cells) that extrachromosomal circular DNA can form at DSBs as the sites are repaired. I propose that activated neurons may generate extrachromosomal circular DNAs during repair at DSB sites, thus creating long-lasting "markers" of that activity pattern which contain sequences from their sites of origin and which regulate long-term gene expression. Although the population of extrachromosomal DNAs is diverse and overall associated with pathology, a subclass of small circular DNAs ("microDNAs," ∼100-400 bases long), largely derives from unique genomic sequences and has attractive features to act as stable, mobile circular DNAs to regulate gene expression in a sequence-specific manner. Circular DNAs can be templates for the transcription of RNAs, particularly small inhibitory siRNAs, circular RNAs and other non-coding RNAs that interact with microRNAs. These may regulate translation and transcription of other genes involved in synaptic plasticity, learning and memory. Another possible fate for mobile DNAs is to be inserted stably into chromosomes after new DSB sites are generated in response to subsequent activation events. Thus, the insertions of mobile DNAs into activity-induced genes may tend to inactivate them and aid in homeostatic regulation to avoid over-excitation, as well as providing a "counter" for a neuron's activation history. Moreover, activated neurons release secretory exosomes that can be transferred to recipient cells to regulate their gene expression. Mobile DNAs may be packaged into exosomes, released in an activity-dependent manner, and transferred to recipient cells, where they may be templates for regulatory RNAs and possibly incorporated into chromosomes. Finally, aging and neurodegenerative diseases (including Alzheimer's disease) are also associated with an increase in DSBs in neurons. It will become important in the future to assess how pathology-associated DSBs may relate to activity-induced mobile DNAs, and whether the latter may potentially contribute to pathogenesis.
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Affiliation(s)
- Neil R. Smalheiser
- Department of Psychiatry, University of Illinois College of Medicine, Chicago, IL, United States
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13
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Zhu M, Tong X, Qiu Q, Pan J, Wei S, Ding Y, Feng Y, Hu X, Gong C. Identification and characterization of extrachromosomal circular DNA in the silk gland of Bombyx mori. INSECT SCIENCE 2023; 30:1565-1578. [PMID: 36826848 DOI: 10.1111/1744-7917.13191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 01/30/2023] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
The silk gland cells of silkworm are special cells which only replicate DNA in the nucleus without cell division throughout the larval stage. The extrachromosomal circular DNAs (eccDNAs) have not yet been reported in the silk gland of silkworms. Herein, we have explored the characterization of eccDNAs in the posterior silk gland of silkworms. A total of 35 346 eccDNAs were identified with sizes ranging from 30 to 13 569 549 bp. Motif analysis revealed that dual direct repeats are flanking the 5' and 3' breaking points of eccDNA. The sequences exceeding 1 kb length in eccDNAs present palindromic sequence characteristics flanking the 5' and 3' breaking points of the eccDNA. These motifs might support possible models for eccDNA generation. Genomic annotation of the eccDNA population revealed that most eccDNAs (58.6%) were derived from intergenic regions, whereas full or partial genes were carried by 41.4% of eccDNAs. It was found that silk protein genes fib-H, fib-L, and P25, as well as the transcription factors SGF and sage, which play an important regulatory role in silk protein synthesis, could be carried by eccDNAs. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses showed that the genes carried by eccDNAs were mainly associated with the development and metabolism-related signaling pathways. Moreover, it was found that eccDNAfib-L could promote the transcription of fib-L gene. Overall, the results of the present study not only provide a novel perspective on the mechanism of silk gland development and silk protein synthesis but also complement previously reported genome-scale eccDNA data supporting that eccDNAs are common in eukaryotes.
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Affiliation(s)
- Min Zhu
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Xinyu Tong
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Qunnan Qiu
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Jun Pan
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Shulin Wei
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Yuming Ding
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Yongjie Feng
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
| | - Xiaolong Hu
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
- Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou, China
| | - Chengliang Gong
- School of Biology & Basic Medical Science, Soochow University, Suzhou, China
- Institute of Agricultural Biotechnology and Ecological Research, Soochow University, Suzhou, China
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14
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Wang X, Qu Y, Xing R, Zhou J, Liu Y, Zhang H, Zhu J, Ma J, Cui X, Song T, Xing S, Ji G, Liu P, Sun W, Fu S, Meng X. Novel insights into the ecDNA formation mechanism involving MSH3 in methotrexate‑resistant human colorectal cancer cells. Int J Oncol 2023; 63:134. [PMID: 37888748 PMCID: PMC10631765 DOI: 10.3892/ijo.2023.5582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 10/11/2023] [Indexed: 10/28/2023] Open
Abstract
Extrachromosomal DNAs (ecDNAs), also known as double minutes (DMs), can induce a fast increase in gene copy numbers and promote the development of cancer, including drug resistance. MutS homolog 3 (MSH3), a key protein in mismatch repair, has been indicated to participate in the regulation of DNA double‑strand break (DSB) repair, which has been reported to be associated with the formation of ecDNAs. However, it remains unclear whether MSH3 can influence drug resistance via ecDNAs in cancer. In the present study, high MSH3 expression was observed in methotrexate (MTX)‑resistant HT29 cells [DM‑ and homogeneously staining region (HSR)‑containing cells] compared with parental HT29 cells. Additionally, decreased amounts of ecDNAs, HSRs and amplified genes locating on ecDNAs and HSRs were detected following depletion of MSH3 and this could be reversed by overexpressing MSH3 in DM‑containing cells. No corresponding changes were found in HSR‑containing cells. The present study further verified the involvement of MSH3‑regulated DNA DSB repair pathways in the formation of ecDNAs by detecting the expression of core proteins and pathway activity. Furthermore, expulsion of ecDNAs/HSRs was detected and increased frequencies of micronuclei/nuclear buds with dihydrofolate reductase (DHFR) signals were observed in MSH3‑depleted DM‑containing cells. Finally, changes in MSH3 expression could affect DHFR amplification‑derived DHFR expression and cell sensitivity to MTX, suggesting that MSH3 may influence cancer drug resistance by altering the amount of ecDNAs. In conclusion, the present study revealed a novel mechanism involving MSH3 in the regulation of ecDNAs by DSB repair, which will have clinical value in the treatment of ecDNA‑based drug resistance in cancer.
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Affiliation(s)
- Xu Wang
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yanan Qu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Ruonan Xing
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jing Zhou
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yanghe Liu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Huishu Zhang
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Biotechnology Experimental Teaching Center, Basic Medical College, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jing Zhu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Jinfa Ma
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiaobo Cui
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Tiantian Song
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Shukai Xing
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Guohua Ji
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Peng Liu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Wenjing Sun
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Songbin Fu
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiangning Meng
- Laboratory of Medical Genetics, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
- Key Laboratory of Preservation of Human Genetic Resources and Disease Control in China, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
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15
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Xu H, Wang Z, Wang Y, Pan S, Zhao W, Chen M, Chen X, Tao T, Ma L, Ni Y, Li W. GSTM2 alleviates heart failure by inhibiting DNA damage in cardiomyocytes. Cell Biosci 2023; 13:220. [PMID: 38037116 PMCID: PMC10688053 DOI: 10.1186/s13578-023-01168-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 11/08/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Heart failure (HF) seriously threatens human health worldwide. However, the pathological mechanisms underlying HF are still not fully clear. RESULTS In this study, we performed proteomics and transcriptomics analyses on samples from human HF patients and healthy donors to obtain an overview of the detailed changes in protein and mRNA expression that occur during HF. We found substantial differences in protein expression changes between the atria and ventricles of myocardial tissues from patients with HF. Interestingly, the metabolic state of ventricular tissues was altered in HF samples, and inflammatory pathways were activated in atrial tissues. Through analysis of differentially expressed genes in HF samples, we found that several glutathione S-transferase (GST) family members, especially glutathione S-transferase M2-2 (GSTM2), were decreased in all the ventricular samples. Furthermore, GSTM2 overexpression effectively relieved the progression of cardiac hypertrophy in a transverse aortic constriction (TAC) surgery-induced HF mouse model. Moreover, we found that GSTM2 attenuated DNA damage and extrachromosomal circular DNA (eccDNA) production in cardiomyocytes, thereby ameliorating interferon-I-stimulated macrophage inflammation in heart tissues. CONCLUSIONS Our study establishes a proteomic and transcriptomic map of human HF tissues, highlights the functional importance of GSTM2 in HF progression, and provides a novel therapeutic target for HF.
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Affiliation(s)
- Hongfei Xu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Zhen Wang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Yalin Wang
- Department of Operation Room, The First Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Shaobo Pan
- Department of Operation Room, The First Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Wenting Zhao
- Department of Cardiology, The First Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Miao Chen
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Xiaofan Chen
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Tingting Tao
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Liang Ma
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China
| | - Yiming Ni
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China.
| | - Weidong Li
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Zhejiang University, School of Medicine, Number 79 Qingchun Road, Hangzhou, China.
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16
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Ren S, Wu D, Shen X, Wu Q, Li C, Xiong H, Xiong Z, Gong R, Liu Z, Wang W, Chen J. Deciphering the role of extrachromosomal circular DNA in adipose stem cells from old and young donors. Stem Cell Res Ther 2023; 14:341. [PMID: 38017497 PMCID: PMC10683086 DOI: 10.1186/s13287-023-03575-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/16/2023] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND The functional impairment of adipose stem cells (ASCs) during aging limits their clinical transformation. Studies have shown that extrachromosomal circular DNAs (eccDNAs) are associated with tumor progression and cell aging, but the roles of eccDNAs in ASCs remain unknown. METHOD We conducted Circle sequencing (Circle-seq) to identify eccDNAs in ASCs isolated from young and old donors. The differentially expressed eccDNAs were calculated, annotated and validated via polymerase chain reaction. RESULTS Thousands of eccDNAs were identified and comprehensively characterized. Most of them were GC-rich, < 1000 base pairs in size, and were enriched on chromosome 19 and 17 with a high density of Alu elements and genes, 2 kb upstream/downstream of genes and satellites. In total, 3025 eccDNAs were differentially expressed among the two ASC groups. Conjoint analysis of the Circle-seq results and previous RNA-seq results revealed that 73 eccDNAs and 55 genes exhibited the same differential expression between the two groups. KEGG and GO analyses revealed that genes encoding differentially expressed eccDNAs were enriched for cell adhesion, cellular senescence and TGF-β receptor signaling pathway. We also found that aged ASCs exhibited loss of eccDNAs, including CAMK2G (chr10: 75577899-75578176), TRABD2B (chr1: 48305638-48307008) and TRABD2B (chr1: 48305425-48307091). CONCLUSION In this study, we elucidated the first eccDNA profile relating to ASCs and demonstrated that three eccDNAs are lost in aged ASCs, which may be potential biomarkers of stem cell aging and valuable targets for stem cell rejuvenation.
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Affiliation(s)
- Sen Ren
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Du Wu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Xiaoyong Shen
- Hospital of Stomatology Wuhan University, Wuhan, 430079, China
| | - Qian Wu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Chengcheng Li
- Department of Hand Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Hewei Xiong
- Department of Emergency Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Zhongwei Xiong
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Rui Gong
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Zheng Liu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China.
| | - Wei Wang
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China.
| | - Jincao Chen
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China.
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17
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Blount BA, Lu X, Driessen MR, Jovicevic D, Sanchez MI, Ciurkot K, Zhao Y, Lauer S, McKiernan RM, Gowers GOF, Sweeney F, Fanfani V, Lobzaev E, Palacios-Flores K, Walker RS, Hesketh A, Cai J, Oliver SG, Cai Y, Stracquadanio G, Mitchell LA, Bader JS, Boeke JD, Ellis T. Synthetic yeast chromosome XI design provides a testbed for the study of extrachromosomal circular DNA dynamics. CELL GENOMICS 2023; 3:100418. [PMID: 38020971 PMCID: PMC10667340 DOI: 10.1016/j.xgen.2023.100418] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 07/13/2023] [Accepted: 09/08/2023] [Indexed: 12/01/2023]
Abstract
We describe construction of the synthetic yeast chromosome XI (synXI) and reveal the effects of redesign at non-coding DNA elements. The 660-kb synthetic yeast genome project (Sc2.0) chromosome was assembled from synthesized DNA fragments before CRISPR-based methods were used in a process of bug discovery, redesign, and chromosome repair, including precise compaction of 200 kb of repeat sequence. Repaired defects were related to poor centromere function and mitochondrial health and were associated with modifications to non-coding regions. As part of the Sc2.0 design, loxPsym sequences for Cre-mediated recombination are inserted between most genes. Using the GAP1 locus from chromosome XI, we show that these sites can facilitate induced extrachromosomal circular DNA (eccDNA) formation, allowing direct study of the effects and propagation of these important molecules. Construction and characterization of synXI contributes to our understanding of non-coding DNA elements, provides a useful tool for eccDNA study, and will inform future synthetic genome design.
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Affiliation(s)
- Benjamin A. Blount
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
- School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Xinyu Lu
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Maureen R.M. Driessen
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Dejana Jovicevic
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Mateo I. Sanchez
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Klaudia Ciurkot
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Yu Zhao
- Institute for Systems Genetics and Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY, USA
| | - Stephanie Lauer
- Institute for Systems Genetics and Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY, USA
| | - Robert M. McKiernan
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
- Department of Life Sciences, Imperial College London, London, UK
| | - Glen-Oliver F. Gowers
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
| | - Fiachra Sweeney
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Life Sciences, Imperial College London, London, UK
| | - Viola Fanfani
- School of Biological Sciences, The University of Edinburgh, Edinburgh, UK
| | - Evgenii Lobzaev
- School of Biological Sciences, The University of Edinburgh, Edinburgh, UK
- School of Informatics, The University of Edinburgh, Edinburgh, UK
| | - Kim Palacios-Flores
- Laboratorio Internacional de Investigación sobre el Genoma Humano, Universidad Nacional Autónoma de México, Querétaro, México
| | - Roy S.K. Walker
- School of Engineering, Institute for Bioengineering, The University of Edinburgh, Edinburgh, UK
| | - Andy Hesketh
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | - Jitong Cai
- Department of Biomedical Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA
| | | | - Yizhi Cai
- School of Biological Sciences, The University of Edinburgh, Edinburgh, UK
- Manchester Institute of Biotechnology, University of Manchester, Manchester, UK
| | | | - Leslie A. Mitchell
- Institute for Systems Genetics and Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY, USA
| | - Joel S. Bader
- Department of Biomedical Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Jef D. Boeke
- Institute for Systems Genetics and Department of Biochemistry and Molecular Pharmacology, NYU Langone Health, New York, NY, USA
- Department of Biomedical Engineering, NYU Tandon School of Engineering, Brooklyn, NY, USA
| | - Tom Ellis
- Imperial College Centre for Synthetic Biology, Imperial College London, London, UK
- Department of Bioengineering, Imperial College London, London, UK
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18
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Ye J, Huang P, Ma K, Zhao Z, Hua T, Zai W, Chen J, Fu X. Genome-Wide Extrachromosomal Circular DNA Profiling of Paired Hepatocellular Carcinoma and Adjacent Liver Tissues. Cancers (Basel) 2023; 15:5309. [PMID: 38001569 PMCID: PMC10670553 DOI: 10.3390/cancers15225309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/27/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Hepatocellular carcinoma (HCC) develops through multiple mechanisms. While recent studies have shown the presence of extrachromosomal circular DNA (eccDNA) in most cancer types, the eccDNA expression pattern and its association with HCC remain obscure. We aimed to investigate this problem. The genome-wide eccDNA profiles of eight paired HCC and adjacent non-tumor tissue samples were comprehensively elucidated based on Circle-seq, and they were further cross-analyzed with the RNA sequencing data to determine the association between eccDNA expression and transcriptome dysregulation. A total of 60,423 unique eccDNA types were identified. Most of the detected eccDNAs were smaller than 1 kb, with a length up to 182,363 bp and a mean sizes of 674 bp (non-tumor) and 813 bp (tumor), showing a greater association with gene-rich rather than with gene-poor regions. Although there was no statistical difference in length and chromosome distribution, the eccDNA patterns between HCC and adjacent non-tumor tissues showed significant differences at both the chromosomal and single gene levels. Five of the eight HCC tissues showed significantly higher amounts of chromosome 22-derived eccDNA expression compared to the non-tumor tissue. Furthermore, two genes, SLC16A3 and BAIAP2L2, with a higher transcription level in tumor tissues, were related to eccDNAs exclusively detected in three HCC samples and were negatively associated with survival rates in HCC cohorts from public databases. These results indicate the existence and massive heterogeneity of eccDNAs in HCC and adjacent liver tissues, and suggest their potential association with dysregulated gene expression.
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Affiliation(s)
- Jianyu Ye
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Peixin Huang
- Liver Cancer Institute, Fudan University, Shanghai 200032, China;
- Department of Hepatic Oncology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Kewei Ma
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Zixin Zhao
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Ting Hua
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Wenjing Zai
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Jieliang Chen
- Key Laboratory of Medical Molecular Virology (MOE & NHC), Research Unit of Cure of Chronic Hepatitis B Virus Infection (CAMS), School of Basic Medical Sciences, Shanghai Medical College Fudan University, Shanghai 200032, China; (J.Y.); (K.M.); (Z.Z.); (T.H.); (W.Z.)
| | - Xiutao Fu
- Liver Cancer Institute, Fudan University, Shanghai 200032, China;
- Department of Liver Surgery and Transplantation, Zhongshan Hospital, Fudan University, Shanghai 200032, China
- Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Shanghai 200032, China
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19
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Hu J, Zhang Z, Xiao S, Cao Y, Chen Y, Weng J, Jiang H, Li W, Chen JY, Liu C. Microhomology-mediated circular DNA formation from oligonucleosomal fragments during spermatogenesis. eLife 2023; 12:RP87115. [PMID: 37847146 PMCID: PMC10581685 DOI: 10.7554/elife.87115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2023] Open
Abstract
The landscape of extrachromosomal circular DNA (eccDNA) during mammalian spermatogenesis, as well as the biogenesis mechanism, remains to be explored. Here, we revealed widespread eccDNA formation in human sperms and mouse spermatogenesis. We noted that germline eccDNAs are derived from oligonucleosomal DNA fragmentation in cells likely undergoing cell death, providing a potential new way for quality assessment of human sperms. Interestingly, small-sized eccDNAs are associated with euchromatin, while large-sized ones are preferentially generated from heterochromatin. By comparing sperm eccDNAs with meiotic recombination hotspots and structural variations, we found that they are barely associated with de novo germline deletions. We further developed a bioinformatics pipeline to achieve nucleotide-resolution eccDNA detection even with the presence of microhomologous sequences that interfere with precise breakpoint identification. Empowered by our method, we provided strong evidence to show that microhomology-mediated end joining is the major eccDNA biogenesis mechanism. Together, our results shed light on eccDNA biogenesis mechanism in mammalian germline cells.
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Affiliation(s)
- Jun Hu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Chemistry and Biomedicine Innovation Center (ChemBIC), Department of Andrology, Nanjing Drum Tower Hospital, Nanjing UniversityNanjingChina
| | - Zhe Zhang
- Department of Urology, Department of Reproductive Medicine Center, Peking University Third HospitalBeijingChina
| | - Sai Xiao
- Guangzhou Women and Children's Medical Center, Guangzhou Medical UniversityGuangzhouChina
| | - Yalei Cao
- Department of Urology, Department of Reproductive Medicine Center, Peking University Third HospitalBeijingChina
| | - Yinghong Chen
- Guangzhou Women and Children's Medical Center, Guangzhou Medical UniversityGuangzhouChina
| | - Jiaming Weng
- Department of Urology, Department of Reproductive Medicine Center, Peking University Third HospitalBeijingChina
| | - Hui Jiang
- Department of Urology, Department of Reproductive Medicine Center, Peking University Third HospitalBeijingChina
- Department of Urology, Peking University First Hospital Institute of UrologyBeijingChina
| | - Wei Li
- Guangzhou Women and Children's Medical Center, Guangzhou Medical UniversityGuangzhouChina
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Stem Cell and Regenerative Medicine Innovation Institute, Chinese Academy of ScienceBeijingChina
| | - Jia-Yu Chen
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Chemistry and Biomedicine Innovation Center (ChemBIC), Department of Andrology, Nanjing Drum Tower Hospital, Nanjing UniversityNanjingChina
- Nanchuang (Jiangsu) Institute of Chemistry and HealthNanjingChina
| | - Chao Liu
- Guangzhou Women and Children's Medical Center, Guangzhou Medical UniversityGuangzhouChina
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Stem Cell and Regenerative Medicine Innovation Institute, Chinese Academy of ScienceBeijingChina
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20
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Guo T, Chen GQ, Li XF, Wang M, Liu KM, Yang XY, Liu SC, Feng YL, Liu PY, Lin H, Xie AY. Small extrachromosomal circular DNA harboring targeted tumor suppressor gene mutations supports intratumor heterogeneity in mouse liver cancer induced by multiplexed CRISPR/Cas9. Genome Med 2023; 15:80. [PMID: 37803452 PMCID: PMC10557318 DOI: 10.1186/s13073-023-01230-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 09/08/2023] [Indexed: 10/08/2023] Open
Abstract
BACKGROUND Primary liver cancer has significant intratumor genetic heterogeneity (IGH), which drives cancer evolution and prevents effective cancer treatment. CRISPR/Cas9-induced mouse liver cancer models can be used to elucidate how IGH is developed. However, as CRISPR/Cas9 could induce chromothripsis and extrachromosomal DNA in cells in addition to targeted mutations, we wondered whether this effect contributes to the development of IGH in CRISPR/Cas9-induced mouse liver cancer. METHODS CRISPR/Cas9-based targeted somatic multiplex-mutagenesis was used to target 34 tumor suppressor genes (TSGs) for induction of primary liver tumors in mice. Target site mutations in tumor cells were analyzed and compared between single-cell clones and their subclones, between different time points of cell proliferation, and between parental clones and single-cell clones derived from mouse subcutaneous allografts. Genomic instability and generation of extrachromosomal circular DNA (eccDNA) was explored as a potential mechanism underlying the oscillation of target site mutations in these liver tumor cells. RESULTS After efficiently inducing autochthonous liver tumors in mice within 30-60 days, analyses of CRISPR/Cas9-induced tumors and single-cell clones derived from tumor nodules revealed multiplexed and heterogeneous mutations at target sites. Many target sites frequently displayed more than two types of allelic variations with varying frequencies in single-cell clones, indicating increased copy number of these target sites. The types and frequencies of targeted TSG mutations continued to change at some target sites between single-cell clones and their subclones. Even the proliferation of a subclone in cell culture and in mouse subcutaneous graft altered the types and frequencies of targeted TSG mutations in the absence of continuing CRISPR/Cas9 genome editing, indicating a new source outside primary chromosomes for the development of IGH in these liver tumors. Karyotyping of tumor cells revealed genomic instability in these cells manifested by high levels of micronuclei and chromosomal aberrations including chromosomal fragments and chromosomal breaks. Sequencing analysis further demonstrated the generation of eccDNA harboring targeted TSG mutations in these tumor cells. CONCLUSIONS Small eccDNAs carrying TSG mutations may serve as an important source supporting intratumor heterogeneity and tumor evolution in mouse liver cancer induced by multiplexed CRISPR/Cas9.
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Affiliation(s)
- Tao Guo
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Guo-Qiao Chen
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Xu-Fan Li
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Meng Wang
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Kun-Ming Liu
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Xiao-Ying Yang
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Si-Cheng Liu
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Yi-Li Feng
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China
| | - Peng-Yuan Liu
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China.
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China.
| | - Hui Lin
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China.
| | - An-Yong Xie
- Innovation Center for Minimally Invasive Technique and Device, Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, 3 East Qingchun Rd, Hangzhou, Zhejiang, 310019, P. R. China.
- Institute of Translational Medicine, Zhejiang University School of Medicine and Zhejiang University Cancer Center, 268 Kai Xuan Rd, Hangzhou, Zhejiang, 310029, P. R. China.
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21
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Gerovska D, Noer JB, Qin Y, Ain Q, Januzi D, Schwab M, Witte OW, Araúzo-Bravo MJ, Kretz A. A distinct circular DNA profile intersects with proteome changes in the genotoxic stress-related hSOD1 G93A model of ALS. Cell Biosci 2023; 13:170. [PMID: 37705092 PMCID: PMC10498603 DOI: 10.1186/s13578-023-01116-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 08/27/2023] [Indexed: 09/15/2023] Open
Abstract
BACKGROUND Numerous genes, including SOD1, mutated in familial and sporadic amyotrophic lateral sclerosis (f/sALS) share a role in DNA damage and repair, emphasizing genome disintegration in ALS. One possible outcome of chromosomal instability and repair processes is extrachromosomal circular DNA (eccDNA) formation. Therefore, eccDNA might accumulate in f/sALS with yet unknown function. METHODS We combined rolling circle amplification with linear DNA digestion to purify eccDNA from the cervical spinal cord of 9 co-isogenic symptomatic hSOD1G93A mutants and 10 controls, followed by deep short-read sequencing. We mapped the eccDNAs and performed differential analysis based on the split read signal of the eccDNAs, referred as DifCir, between the ALS and control specimens, to find differentially produced per gene circles (DPpGC) in the two groups. Compared were eccDNA abundances, length distributions and genic profiles. We further assessed proteome alterations in ALS by mass spectrometry, and matched the DPpGCs with differentially expressed proteins (DEPs) in ALS. Additionally, we aligned the ALS-specific DPpGCs to ALS risk gene databases. RESULTS We found a six-fold enrichment in the number of unique eccDNAs in the genotoxic ALS-model relative to controls. We uncovered a distinct genic circulome profile characterized by 225 up-DPpGCs, i.e., genes that produced more eccDNAs from distinct gene sequences in ALS than under control conditions. The inter-sample recurrence rate was at least 89% for the top 6 up-DPpGCs. ALS proteome analyses revealed 42 corresponding DEPs, of which 19 underlying genes were itemized for an ALS risk in GWAS databases. The up-DPpGCs and their DEP tandems mainly impart neuron-specific functions, and gene set enrichment analyses indicated an overrepresentation of the adenylate cyclase modulating G protein pathway. CONCLUSIONS We prove, for the first time, a significant enrichment of eccDNA in the ALS-affected spinal cord. Our triple circulome, proteome and genome approach provide indication for a potential importance of certain eccDNAs in ALS neurodegeneration and a yet unconsidered role as ALS biomarkers. The related functional pathways might open up new targets for therapeutic intervention.
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Affiliation(s)
- Daniela Gerovska
- Computational Biology and Systems Biomedicine, Biodonostia Health Research Institute, 20014, San Sebastian, Spain
| | - Julie B Noer
- Department of Biology, Section for Ecology and Evolution, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Yating Qin
- Department of Biology, Section for Ecology and Evolution, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Quratul Ain
- Department of Neurology, Jena University Hospital, 07747, Jena, Thuringia, Germany
- Department of Internal Medicine IV, Hepatology, Jena University Hospital, 07747, Jena, Thuringia, Germany
| | - Donjetë Januzi
- Department of Neurology, Jena University Hospital, 07747, Jena, Thuringia, Germany
| | - Matthias Schwab
- Department of Neurology, Jena University Hospital, 07747, Jena, Thuringia, Germany
| | - Otto W Witte
- Department of Neurology, Jena University Hospital, 07747, Jena, Thuringia, Germany
- Jena Center for Healthy Ageing, Jena University Hospital, Jena, Thuringia, Germany
| | - Marcos J Araúzo-Bravo
- Computational Biology and Systems Biomedicine, Biodonostia Health Research Institute, 20014, San Sebastian, Spain.
- Basque Foundation for Science, IKERBASQUE, 48013, Bilbao, Spain.
- Max Planck Institute for Molecular Biomedicine, Computational Biology and Bioinformatics Group, 48149, Münster, North Rhine-Westphalia, Germany.
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, University of Basque Country (UPV/EHU), 48940, Leioa, Spain.
| | - Alexandra Kretz
- Department of Neurology, Jena University Hospital, 07747, Jena, Thuringia, Germany.
- Jena Center for Healthy Ageing, Jena University Hospital, Jena, Thuringia, Germany.
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22
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Yüksel A, Altungöz O. Gene amplifications and extrachromosomal circular DNAs: function and biogenesis. Mol Biol Rep 2023; 50:7693-7703. [PMID: 37433908 DOI: 10.1007/s11033-023-08649-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 06/28/2023] [Indexed: 07/13/2023]
Abstract
Gene amplification is an increase in the copy number of restricted chromosomal segments that contain gene(s) and frequently results in the over-expression of the corresponding gene(s). Amplification may be found in the form of extrachromosomal circular DNAs (eccDNAs) or as linear repetitive amplicon regions that are integrated into chromosomes, which may form cytogenetically observable homogeneously staining regions or may be scattered throughout the genome. eccDNAs are structurally circular and in terms of their function and content, they can be classified into various subtypes. They play pivotal roles in many physiological and pathological phenomena such as tumor pathogenesis, aging, maintenance of telomere length and ribosomal DNAs (rDNAs), and gain of resistance against chemotherapeutic agents. Amplification of oncogenes is consistently seen in various types of cancers and can be associated with prognostic factors. eccDNAs are known to be originated from chromosomes as a consequence of various cellular events such as repair processes of damaged DNA or DNA replication errors. In this review, we highlighted the role of gene amplification in cancer, the functional aspects of eccDNAs subtypes, the proposed biogenesis mechanisms, and their role in gene or segmental-DNA amplification.
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Affiliation(s)
- Ali Yüksel
- Department of Medical Biology and Genetics, Institute of Health Sciences, Dokuz Eylul University, 35330, Izmir, Turkey.
| | - Oğuz Altungöz
- Department of Medical Biology and Genetics, Institute of Health Sciences, Dokuz Eylul University, 35330, Izmir, Turkey.
- Department of Medical Biology, Dokuz Eylül Medical School, 35330, Izmir, Turkey.
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23
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Di Vincenzo F, Yadid Y, Petito V, Emoli V, Masi L, Gerovska D, Araúzo-Bravo MJ, Gasbarrini A, Regenberg B, Scaldaferri F. Circular and Circulating DNA in Inflammatory Bowel Disease: From Pathogenesis to Potential Molecular Therapies. Cells 2023; 12:1953. [PMID: 37566032 PMCID: PMC10417561 DOI: 10.3390/cells12151953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 07/15/2023] [Accepted: 07/25/2023] [Indexed: 08/12/2023] Open
Abstract
Inflammatory bowel diseases (IBD), including Crohn's Disease (CD) and Ulcerative Colitis (UC) are chronic multifactorial disorders which affect the gastrointestinal tract with variable extent. Despite extensive research, their etiology and exact pathogenesis are still unknown. Cell-free DNAs (cfDNAs) are defined as any DNA fragments which are free from the origin cell and able to circulate into the bloodstream with or without microvescicles. CfDNAs are now being increasingly studied in different human diseases, like cancer or inflammatory diseases. However, to date it is unclear how IBD etiology is linked to cfDNAs in plasma. Extrachromosomal circular DNA (eccDNA) are non-plasmidic, nuclear, circular and closed DNA molecules found in all eukaryotes tested. CfDNAs appear to play an important role in autoimmune diseases, inflammatory processes, and cancer; recently, interest has also grown in IBD, and their role in the pathogenesis of IBD has been suggested. We now suggest that eccDNAs also play a role in IBD. In this review, we have comprehensively collected available knowledge in literature regarding cfDNA, eccDNA, and structures involving them such as neutrophil extracellular traps and exosomes, and their role in IBD. Finally, we focused on old and novel potential molecular therapies and drug delivery systems, such as nanoparticles, for IBD treatment.
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Affiliation(s)
- Federica Di Vincenzo
- IBD Unit, Centro di Malattie dell’Apparato Digerente (CeMAD), Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (F.D.V.); (L.M.); (A.G.); (F.S.)
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (Y.Y.); (V.E.)
| | - Ylenia Yadid
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (Y.Y.); (V.E.)
| | - Valentina Petito
- IBD Unit, Centro di Malattie dell’Apparato Digerente (CeMAD), Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (F.D.V.); (L.M.); (A.G.); (F.S.)
| | - Valeria Emoli
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (Y.Y.); (V.E.)
| | - Letizia Masi
- IBD Unit, Centro di Malattie dell’Apparato Digerente (CeMAD), Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (F.D.V.); (L.M.); (A.G.); (F.S.)
| | - Daniela Gerovska
- Computational Biology and Systems Biomedicine, Biodonostia Health Research Institute, Calle Doctor Begiristain s/n, 20014 San Sebastian, Spain; (D.G.); (M.J.A.-B.)
| | - Marcos Jesus Araúzo-Bravo
- Computational Biology and Systems Biomedicine, Biodonostia Health Research Institute, Calle Doctor Begiristain s/n, 20014 San Sebastian, Spain; (D.G.); (M.J.A.-B.)
- IKERBASQUE, Basque Foundation for Science, Calle María Díaz Harokoa 3, 48013 Bilbao, Spain
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, University of Basque Country (UPV/EHU), 48940 Leioa, Spain
| | - Antonio Gasbarrini
- IBD Unit, Centro di Malattie dell’Apparato Digerente (CeMAD), Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (F.D.V.); (L.M.); (A.G.); (F.S.)
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (Y.Y.); (V.E.)
| | - Birgitte Regenberg
- Section for Ecology and Evolution, Department of Biology, University of Copenhagen, Universitetsparken 13, Room 426, DK-2100 Copenhagen, Denmark;
| | - Franco Scaldaferri
- IBD Unit, Centro di Malattie dell’Apparato Digerente (CeMAD), Medicina Interna e Gastroenterologia, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, 00168 Rome, Italy; (F.D.V.); (L.M.); (A.G.); (F.S.)
- Dipartimento di Medicina e Chirurgia Traslazionale, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (Y.Y.); (V.E.)
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24
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Dong Y, He Q, Chen X, Yang F, He L, Zheng Y. Extrachromosomal DNA (ecDNA) in cancer: mechanisms, functions, and clinical implications. Front Oncol 2023; 13:1194405. [PMID: 37448518 PMCID: PMC10338009 DOI: 10.3389/fonc.2023.1194405] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/05/2023] [Indexed: 07/15/2023] Open
Abstract
Extrachromosomal DNA (ecDNA) is circular DNA that plays an important role in the development and heterogeneity of cancer. The rapid evolution of methods to detect ecDNA, including microscopic and sequencing approaches, has greatly enhanced our knowledge of the role of ecDNA in cancer development and evolution. Here, we review the molecular characteristics, functions, mechanisms of formation, and detection methods of ecDNA, with a focus on the potential clinical implications of ecDNA in cancer. Specifically, we consider the role of ecDNA in acquired drug resistance, as a diagnostic and prognostic biomarker, and as a therapeutic target in the context of cancer. As the pathological and clinical significance of ecDNA continues to be explored, it is anticipated that ecDNA will have broad applications in the diagnosis, prognosis, and treatment of patients with cancer.
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Affiliation(s)
- Yucheng Dong
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Qi He
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xinyu Chen
- Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Fan Yang
- Department of Liver Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Li He
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma, OK, United States
| | - Yongchang Zheng
- Department of Liver Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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25
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Jiang X, Pan X, Li W, Han P, Yu J, Li J, Zhang H, Lv W, Zhang Y, He Y, Xiang X. Genome-wide characterization of extrachromosomal circular DNA in gastric cancer and its potential role in carcinogenesis and cancer progression. Cell Mol Life Sci 2023; 80:191. [PMID: 37369919 DOI: 10.1007/s00018-023-04838-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 05/03/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023]
Abstract
Extrachromosomal circular DNAs (eccDNAs) carrying random genomic segments are broadly found across different cancer types, but their molecular functions and impact in gastric cancer (GC) are rarely known. In this study, we aimed to investigate the potential role of eccDNA in GC. Using the Circle-seq strategy, we observed the eccDNA abundance in gastric cancer tissues (GCT) was aberrantly higher than that of normal adjacent tissues (NAT). The high abundance of eccDNAs carrying oncogene-segments in GCT may represent the DNA damage products of amplified oncogenes. Analysis of GCT over-represented eccDNA carrying enhancer (eccEnhancer) based on data from FANTOM5 project combined with TCGA database suggested the GC over-represented eccEnhancers may contribute to development of GC. GC over-represented eccDNAs carrying pre-miRNA (eccMIR) were enriched to multiple cancer-relevant signal pathways by KEGG analysis. We then synthesized the top six GC over-represented eccMIRs and found four of them enabled high expression of miRNAs and down-regulation of miRNA-target genes in MGC803 cells. Furthermore, we observed the inheritance of GC over-represented eccMIRs benefited host cell proliferation and promoted the aggressive features of host cells. Altogether, this study revealed the GC over-represented eccDNAs carrying functional genomic segments were related to the carcinogenesis of GC and presented the capability to facilitate cancer progression, suggesting the cancerous eccDNAs may serve as a dynamic reservoir for genome plasticity and rapid adaptive evolution of cancer. Therefore, blocking the pathways for eccDNAs generation may provide a novel therapeutic strategy for the treatment of gastric cancer.
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Affiliation(s)
- Xianming Jiang
- Scientific Research Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Xiaoguang Pan
- Department of Biology, University of Copenhagen, 2200, Copenhagen, Denmark
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, 266555, Shandong, China
| | - Wenchao Li
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Peng Han
- Department of Biology, University of Copenhagen, 2200, Copenhagen, Denmark
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, 266555, Shandong, China
| | - Jiaying Yu
- Scientific Research Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China
| | - Jing Li
- College of Medicine and Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shanxi, China
| | - Haoran Zhang
- College of Medicine and Forensics, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shanxi, China
| | - Wei Lv
- Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, 266555, Shandong, China
- College of Life Sciences, University of Chinese Academy of Science, Beijing, 100049, China
| | - Ying Zhang
- Tomas Lindahl Nobel Laureate Laboratory, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518107, Guangdong, China.
| | - Yulong He
- Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China.
| | - Xi Xiang
- Scientific Research Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, 518107, Guangdong, China.
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26
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Wright GM, Menzel J, Tatman PD, Black JC. Transition from Transient DNA Rereplication to Inherited Gene Amplification Following Prolonged Environmental Stress. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.08.539886. [PMID: 37214911 PMCID: PMC10197558 DOI: 10.1101/2023.05.08.539886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Cells require the ability to adapt to changing environmental conditions, however, it is unclear how these changes elicit stable permanent changes in genomes. We demonstrate that, in response to environmental metal exposure, the metallothionein (MT) locus undergoes DNA rereplication generating transient site-specific gene amplifications (TSSGs). Chronic metal exposure allows transition from MT TSSG to inherited MT gene amplification through homologous recombination within and outside of the MT locus. DNA rereplication of the MT locus is suppressed by H3K27me3 and EZH2. Long-term ablation of EZH2 activity eventually leads to integration and inheritance of MT gene amplifications without the selective pressure of metal exposure. The rereplication and inheritance of MT gene amplification is an evolutionarily conserved response to environmental metal from yeast to human. Our results describe a new paradigm for adaptation to environmental stress where targeted, transient DNA rereplication precedes stable inherited gene amplification.
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Chamorro González R, Conrad T, Stöber MC, Xu R, Giurgiu M, Rodriguez-Fos E, Kasack K, Brückner L, van Leen E, Helmsauer K, Dorado Garcia H, Stefanova ME, Hung KL, Bei Y, Schmelz K, Lodrini M, Mundlos S, Chang HY, Deubzer HE, Sauer S, Eggert A, Schulte JH, Schwarz RF, Haase K, Koche RP, Henssen AG. Parallel sequencing of extrachromosomal circular DNAs and transcriptomes in single cancer cells. Nat Genet 2023; 55:880-890. [PMID: 37142849 PMCID: PMC10181933 DOI: 10.1038/s41588-023-01386-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/28/2023] [Indexed: 05/06/2023]
Abstract
Extrachromosomal DNAs (ecDNAs) are common in cancer, but many questions about their origin, structural dynamics and impact on intratumor heterogeneity are still unresolved. Here we describe single-cell extrachromosomal circular DNA and transcriptome sequencing (scEC&T-seq), a method for parallel sequencing of circular DNAs and full-length mRNA from single cells. By applying scEC&T-seq to cancer cells, we describe intercellular differences in ecDNA content while investigating their structural heterogeneity and transcriptional impact. Oncogene-containing ecDNAs were clonally present in cancer cells and drove intercellular oncogene expression differences. In contrast, other small circular DNAs were exclusive to individual cells, indicating differences in their selection and propagation. Intercellular differences in ecDNA structure pointed to circular recombination as a mechanism of ecDNA evolution. These results demonstrate scEC&T-seq as an approach to systematically characterize both small and large circular DNA in cancer cells, which will facilitate the analysis of these DNA elements in cancer and beyond.
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Affiliation(s)
- Rocío Chamorro González
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Thomas Conrad
- Genomics Technology Platform, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Maja C Stöber
- Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Charité-Universitätsmedizin Berlin, Berlin, Germany
- Faculty of Life Science, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Robin Xu
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Mădălina Giurgiu
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
- Freie Universität Berlin, Berlin, Germany
| | - Elias Rodriguez-Fos
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Katharina Kasack
- Fraunhofer Institute for Cell Therapy and Immunology, Branch Bioanalytics and Bioprocesses IZI-BB, Potsdam, Germany
| | - Lotte Brückner
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - Eric van Leen
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Konstantin Helmsauer
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Heathcliff Dorado Garcia
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Maria E Stefanova
- RG Development and Disease, Max Planck Institute for Molecular Genetics, Berlin, Germany
- Institute for Medical Genetics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - King L Hung
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA
| | - Yi Bei
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
| | - Karin Schmelz
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Marco Lodrini
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Stefan Mundlos
- RG Development and Disease, Max Planck Institute for Molecular Genetics, Berlin, Germany
- Institute for Medical Genetics, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Howard Y Chang
- Center for Personal Dynamic Regulomes, Stanford University School of Medicine, Stanford, CA, USA
- Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA, USA
| | - Hedwig E Deubzer
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
- German Cancer Consortium, partner site Berlin, and German Cancer Research Center, Heidelberg, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Sascha Sauer
- Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Angelika Eggert
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- German Cancer Consortium, partner site Berlin, and German Cancer Research Center, Heidelberg, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Johannes H Schulte
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- German Cancer Consortium, partner site Berlin, and German Cancer Research Center, Heidelberg, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Roland F Schwarz
- Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institute for Computational Cancer Biology, Center for Integrated Oncology, Cancer Research Center Cologne Essen Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
- Berlin Institute for the Foundations of Learning and Data, Berlin, Germany
| | - Kerstin Haase
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany
- German Cancer Consortium, partner site Berlin, and German Cancer Research Center, Heidelberg, Germany
| | - Richard P Koche
- Center for Epigenetics Research, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Anton G Henssen
- Department of Pediatric Oncology and Hematology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.
- Experimental and Clinical Research Center of the MDC and Charité Berlin, Berlin, Germany.
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany.
- German Cancer Consortium, partner site Berlin, and German Cancer Research Center, Heidelberg, Germany.
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28
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Holt S, Arrey G, Regenberg B. Did circular DNA shape the evolution of mammalian genomes? Trends Biochem Sci 2023; 48:317-320. [PMID: 36280496 DOI: 10.1016/j.tibs.2022.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 11/05/2022]
Abstract
Extrachromosomal circular DNA (eccDNA) can shape the genomes of somatic cells, but how it impacts genomes across generations is largely unexplored. We propose that genomes can rearrange via circular intermediates across generations and show that up to 6% of a mammalian genome can have changed gene order through eccDNA.
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Affiliation(s)
- Sylvester Holt
- Department of Biology, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Gerard Arrey
- Department of Biology, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Birgitte Regenberg
- Department of Biology, University of Copenhagen, Copenhagen DK-2100, Denmark.
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29
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Wang Y, Wang M, Zhang Y. Purification, full-length sequencing and genomic origin mapping of eccDNA. Nat Protoc 2023; 18:683-699. [PMID: 36517607 DOI: 10.1038/s41596-022-00783-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 09/23/2022] [Indexed: 12/23/2022]
Abstract
Extrachromosomal circular DNA (eccDNA) was discovered more than half a century ago. However, its biogenesis and function have just begun to be elucidated. One hurdle that has prevented our understanding of eccDNA is the difficulty in obtaining pure eccDNA from cells. The current eccDNA purification methods mainly rely on depleting linear DNAs by exonuclease digestion after obtaining crude circles by alkaline lysis. Owing to eccDNA's low abundance and heterogeneous size, the current purification methods are not efficient in obtaining pure eccDNA. Here we describe a new three-step eccDNA purification (3SEP) procedure that adds a step to recover circular DNA, but not linear DNA that escape from the exonuclease digestion, whereby 3SEP results in eccDNA preparations with high purity and reproducibility. Additionally, we developed a full-length eccDNA sequencing technique by combining rolling-circle amplification with Nanopore sequencing. Accordingly, we developed a full-length eccDNA caller (Flec) to call the consensus sequence of multiple tandem copies of eccDNA contained within the debranched rolling-circle amplification product and map the consensus to its genomic origin. Collectively, our protocol will facilitate eccDNA identification and characterization, and has the potential for diagnostic and clinical applications. For a well-trained molecular biologist, it takes ~1-2 d to purify eccDNAs, another 5-6 d to carry out Nanopore library preparation and sequencing, and 1-5 d for an experienced bioinformatic scientist to analyze the data.
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Affiliation(s)
- Yuangao Wang
- Howard Hughes Medical Institute, Boston, MA, USA.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Meng Wang
- Howard Hughes Medical Institute, Boston, MA, USA.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Yi Zhang
- Howard Hughes Medical Institute, Boston, MA, USA. .,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA. .,Department of Genetics, Boston, MA, USA. .,Harvard Stem Cell Institute WAB-149G, Boston, MA, USA.
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30
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Guo J, Zhang Z, Li Q, Chang X, Liu X. TeCD: The eccDNA Collection Database for extrachromosomal circular DNA. BMC Genomics 2023; 24:47. [PMID: 36707765 PMCID: PMC9881285 DOI: 10.1186/s12864-023-09135-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 01/13/2023] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Extrachromosomal circular DNA (eccDNA) is a kind of DNA that widely exists in eukaryotic cells. Studies in recent years have shown that eccDNA is often enriched during tumors and aging, and participates in the development of cell physiological activities in a special way, so people have paid more and more attention to the eccDNA, and it has also become a critical new topic in modern biological research. DESCRIPTION We built a database to collect eccDNA, including animals, plants and fungi, and provide researchers with an eccDNA retrieval platform. The collected eccDNAs were processed in a uniform format and classified according to the species to which it belongs and the chromosome of the source. Each eccDNA record contained sequence length, start and end sites on the corresponding chromosome, order of the bases, genomic elements such as genes and transposons, and other information in the respective sequencing experiment. All the data were stored into the TeCD (The eccDNA Collection Database) and the BLAST (Basic Local Alignment Search Tool) sequence alignment function was also added into the database for analyzing the potential eccDNA sequences. CONCLUSION We built TeCD, a platform for users to search and obtain eccDNA data, and analyzed the possible potential functions of eccDNA. These findings may provide a basis and direction for researchers to further explore the biological significance of eccDNA in the future.
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Affiliation(s)
- Jing Guo
- grid.410726.60000 0004 1797 8419Key Laboratory of Systems Biology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.410726.60000 0004 1797 8419Key Laboratory of Systems Health Science of Zhejiang Province, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.464226.00000 0004 1760 7263Institute of Statistics and Applied Mathematics, Anhui University of Finance & Economics, Bengbu, 233030 China ,grid.27255.370000 0004 1761 1174School of Mathematics and Statistics, Shandong University, Weihai, 264209 Shandong China
| | - Ze Zhang
- grid.410726.60000 0004 1797 8419Key Laboratory of Systems Biology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.410726.60000 0004 1797 8419Key Laboratory of Systems Health Science of Zhejiang Province, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.410726.60000 0004 1797 8419School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China
| | - Qingcui Li
- grid.410726.60000 0004 1797 8419School of Life Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China
| | - Xiao Chang
- grid.464226.00000 0004 1760 7263Institute of Statistics and Applied Mathematics, Anhui University of Finance & Economics, Bengbu, 233030 China
| | - Xiaoping Liu
- grid.410726.60000 0004 1797 8419Key Laboratory of Systems Biology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.410726.60000 0004 1797 8419Key Laboratory of Systems Health Science of Zhejiang Province, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310013 China ,grid.27255.370000 0004 1761 1174School of Mathematics and Statistics, Shandong University, Weihai, 264209 Shandong China
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31
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Sun H, Lu X, Zou L. EccBase: A high-quality database for exploration and characterization of extrachromosomal circular DNAs in cancer. Comput Struct Biotechnol J 2023; 21:2591-2601. [PMID: 37114214 PMCID: PMC10126927 DOI: 10.1016/j.csbj.2023.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 04/13/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Extrachromosomal circular DNAs (eccDNAs) are widely observed in eukaryotes. Previous studies have demonstrated that eccDNAs are essential to cancer progression, and found that they can not only express in normal cells to regulate RNA, but also function differently in different tissues. It is of major interest to conduct computational or experiments assay to elucidate the mechanisms of eccDNA function, uncover key eccDNAs associated with diseases, and even develop related algorithms for liquid biopsy. Naturally, a comprehensive eccDNAs data resource is urgently needed to provide annotation and analysis more in-depth research. In this study, we constructed the eccBase (http://www.eccbase.net) in literature curation and database retrieval, which was the first database mainly collecting eccDNAs from Homo sapiens (n = 754,391) and Mus musculus (n = 481,381). Homo sapiens eccDNAs were taken from 50 kinds of cancer tissue and/or cell line, and 5 kinds of healthy tissues. The Mus musculus eccDNAs were sourced from 13 kinds of healthy tissue and/or cell line. We thoroughly annotated all eccDNA molecules in terms of basic information, genomic composition, regulatory elements, epigenetic modifications, and raw data. EccBase provided users with the ability to browse, search, download for targets of interest, as well as similarity alignment by the integrated BLAST. Further, comparative analysis suggested the cancer eccDNA is composed of nucleosomes and is prominently derived from the gene-dense regions. We also initially revealed that eccDNAs are strongly tissue-specific. In short, we have started a robust database for eccDNA resource utilization, which may facilitate studying the role of eccDNA in cancer development and therapy, cell function maintenance, and tissue differentiation.
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Affiliation(s)
- Haiyang Sun
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300350 Tianjin, China
- Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, 518102 Shenzhen, China
| | - Xinyi Lu
- State Key Laboratory of Medicinal Chemical Biology, Nankai University, 300350 Tianjin, China
| | - Lingyun Zou
- Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing Key Laboratory of Emergency Medicine, Chongqing University Central Hospital, Chongqing University, 400014 Chongqing, China
- Shenzhen Baoan Women’s and Children’s Hospital, Jinan University, 518102 Shenzhen, China
- Corresponding author at: Department of Clinical Data Research, Chongqing Emergency Medical Center, Chongqing Key Laboratory of Emergency Medicine, Chongqing University Central Hospital, Chongqing University, 400014 Chongqing, China.
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32
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Recurrent repeat expansions in human cancer genomes. Nature 2023; 613:96-102. [PMID: 36517591 DOI: 10.1038/s41586-022-05515-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/02/2022] [Indexed: 12/16/2022]
Abstract
Expansion of a single repetitive DNA sequence, termed a tandem repeat (TR), is known to cause more than 50 diseases1,2. However, repeat expansions are often not explored beyond neurological and neurodegenerative disorders. In some cancers, mutations accumulate in short tracts of TRs, a phenomenon termed microsatellite instability; however, larger repeat expansions have not been systematically analysed in cancer3-8. Here we identified TR expansions in 2,622 cancer genomes spanning 29 cancer types. In seven cancer types, we found 160 recurrent repeat expansions (rREs), most of which (155/160) were subtype specific. We found that rREs were non-uniformly distributed in the genome with enrichment near candidate cis-regulatory elements, suggesting a potential role in gene regulation. One rRE, a GAAA-repeat expansion, located near a regulatory element in the first intron of UGT2B7 was detected in 34% of renal cell carcinoma samples and was validated by long-read DNA sequencing. Moreover, in preliminary experiments, treating cells that harbour this rRE with a GAAA-targeting molecule led to a dose-dependent decrease in cell proliferation. Overall, our results suggest that rREs may be an important but unexplored source of genetic variation in human cancer, and we provide a comprehensive catalogue for further study.
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Joubert PM, Krasileva KV. The extrachromosomal circular DNAs of the rice blast pathogen Magnaporthe oryzae contain a wide variety of LTR retrotransposons, genes, and effectors. BMC Biol 2022; 20:260. [PMID: 36424609 PMCID: PMC9694575 DOI: 10.1186/s12915-022-01457-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/03/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND One of the ways genomes respond to stress is by producing extrachromosomal circular DNAs (eccDNAs). EccDNAs can contain genes and dramatically increase their copy number. They can also reinsert into the genome, generating structural variation. They have been shown to provide a source of phenotypic and genotypic plasticity in several species. However, whole circularome studies have so far been limited to a few model organisms. Fungal plant pathogens are a serious threat to global food security in part because of their rapid adaptation to disease prevention strategies. Understanding the mechanisms fungal pathogens use to escape disease control is paramount to curbing their threat. RESULTS We present a whole circularome sequencing study of the rice blast pathogen, Magnaporthe oryzae. We find that M. oryzae has a highly diverse circularome that contains many genes and shows evidence of large LTR retrotransposon activity. We find that genes enriched on eccDNAs in M. oryzae occur in genomic regions prone to presence-absence variation and that disease-associated genes are frequently on eccDNAs. Finally, we find that a subset of genes is never present on eccDNAs in our data, which indicates that the presence of these genes on eccDNAs is selected against. CONCLUSIONS Our study paves the way to understanding how eccDNAs contribute to adaptation in M. oryzae. Our analysis also reveals how M. oryzae eccDNAs differ from those of other species and highlights the need for further comparative characterization of eccDNAs across species to gain a better understanding of these molecules.
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Affiliation(s)
- Pierre M Joubert
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA.
| | - Ksenia V Krasileva
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA.
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Wanchai V, Jenjaroenpun P, Leangapichart T, Arrey G, Burnham CM, Tümmler MC, Delgado-Calle J, Regenberg B, Nookaew I. CReSIL: accurate identification of extrachromosomal circular DNA from long-read sequences. Brief Bioinform 2022; 23:bbac422. [PMID: 36198068 PMCID: PMC10144670 DOI: 10.1093/bib/bbac422] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/17/2022] [Accepted: 08/30/2022] [Indexed: 12/14/2022] Open
Abstract
Extrachromosomal circular DNA (eccDNA) of chromosomal origin is found in many eukaryotic species and cell types, including cancer, where eccDNAs with oncogenes drive tumorigenesis. Most studies of eccDNA employ short-read sequencing for their identification. However, short-read sequencing cannot resolve the complexity of genomic repeats, which can lead to missing eccDNA products. Long-read sequencing technologies provide an alternative to constructing complete eccDNA maps. We present a software suite, Construction-based Rolling-circle-amplification for eccDNA Sequence Identification and Location (CReSIL), to identify and characterize eccDNA from long-read sequences. CReSIL's performance in identifying eccDNA, with a minimum F1 score of 0.98, is superior to the other bioinformatic tools based on simulated data. CReSIL provides many useful features for genomic annotation, which can be used to infer eccDNA function and Circos visualization for eccDNA architecture investigation. We demonstrated CReSIL's capability in several long-read sequencing datasets, including datasets enriched for eccDNA and whole genome datasets from cells containing large eccDNA products. In conclusion, the CReSIL suite software is a versatile tool for investigating complex and simple eccDNA in eukaryotic cells.
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Affiliation(s)
- Visanu Wanchai
- Department of Biomedical Informatics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Piroon Jenjaroenpun
- Division of Bioinformatics and Data Management for Research, Research Group and Research Network Division, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thongpan Leangapichart
- Department of Biomedical Informatics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Gerard Arrey
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Charles M Burnham
- Department of Biomedical Informatics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Maria C Tümmler
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jesus Delgado-Calle
- Department of Physiology and Cell Biology, College of Medicine, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
| | - Birgitte Regenberg
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Intawat Nookaew
- Department of Biomedical Informatics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, United States of America
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35
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Zhu Y, Liu Z, Guo Y, Li S, Qu Y, Dai L, Chen Y, Ning W, Zhang H, Ma L. Whole-genome sequencing of extrachromosomal circular DNA of cerebrospinal fluid of medulloblastoma. Front Oncol 2022; 12:934159. [PMID: 36452490 PMCID: PMC9703567 DOI: 10.3389/fonc.2022.934159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/12/2022] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND Medulloblastoma (MB) is a malignant tumor associated with a poor prognosis in part due to a lack of effective detection methods. Extrachromosomal circular DNA (eccDNA) has been associated with multiple tumors. Nonetheless, little is currently known on eccDNA in MB. METHODS Genomic features of eccDNAs were identified in MB tissues and matched cerebrospinal fluid (CSF) and compared with corresponding normal samples using Circle map. The nucleotides on both sides of the eccDNAs' breakpoint were analyzed to understand the mechanisms of eccDNA formation. Bioinformatics analysis combined with the Gene Expression Omnibus (GEO) database identified features of eccDNA-related genes in MB. Lasso Cox regression model, univariate and multivariate Cox regression analysis, time-dependent ROC, and Kaplan-Meier curve were used to assess the potential diagnostic and prognostic value of the hub genes. RESULTS EccDNA was profiled in matched tumor and CSF samples from MB patients, and control, eccDNA-related genes enriched in MB were identified. The distribution of eccDNAs in the genome was closely related to gene density and the mechanism of eccDNA formation was evaluated. EccDNAs in CSF exhibited similar distribution with matched MB tissues but were differentially expressed between tumor and normal. Ten hub genes prominent in both the eccDNA dataset and the GEO database were selected to classify MB patients to either high- or low-risk groups, and a prognostic nomogram was thus established. CONCLUSIONS This study provides preliminary evidence of the characteristics and formation mechanism of eccDNAs in MB and CSF. Importantly, eccDNA-associated hub genes in CSF could be used as diagnostic and prognostic biomarkers for MB.
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Affiliation(s)
- Yi Zhu
- Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, China
| | - Zhihui Liu
- Department of Obstetrics and Gynecology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yuduo Guo
- Chinese Academy of Sciences (CAS) Key Laboratory of Infection and Immunity, Institute of biophysics, Chinese Academy of Sciences, Beijing, China
| | - Shenglun Li
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Yanming Qu
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Lin Dai
- Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, China
| | - Yujia Chen
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Weihai Ning
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Hongwei Zhang
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Lixin Ma
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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36
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Zhao Y, Yu L, Zhang S, Su X, Zhou X. Extrachromosomal circular DNA: Current status and future prospects. eLife 2022; 11:81412. [PMID: 36256570 PMCID: PMC9578701 DOI: 10.7554/elife.81412] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 10/05/2022] [Indexed: 11/25/2022] Open
Abstract
Extrachromosomal circular DNA (eccDNA) is a double-stranded DNA molecule found in various organisms, including humans. In the past few decades, the research on eccDNA has mainly focused on cancers and their associated diseases. Advancements in modern omics technologies have reinvigorated research on eccDNA and shed light on the role of these molecules in a range of diseases and normal cell phenotypes. In this review, we first summarize the formation of eccDNA and its modes of action in eukaryotic cells. We then outline eccDNA as a disease biomarker and reveal its regulatory mechanism. We finally discuss the future prospects of eccDNA, including basic research and clinical application. Thus, with the deepening of understanding and exploration of eccDNAs, they hold great promise in future biomedical research and clinical translational application.
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Affiliation(s)
- Yiheng Zhao
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Linchan Yu
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Shuchen Zhang
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiangyu Su
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiang Zhou
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou, China
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Li F, Yang L, Han J, Han X, Peng L, Du Y, Xia H, Yang L, Zhou Y. Characterization of extrachromosomal circular DNA in cattle using 676 whole genome sequencing datasets. Anim Genet 2022; 53:761-768. [PMID: 36226728 DOI: 10.1111/age.13269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 09/22/2022] [Accepted: 09/24/2022] [Indexed: 11/28/2022]
Abstract
Extrachromosomal circular DNA (eccDNA) is an important fraction of the genome. Recent studies proved that eccDNA plays important roles in genetic variation, aging and environmental adaptation, which have drawn wide attention. However, the characteristics of eccDNA in cattle remain unclear. Here, we studied eccDNAs from 676 cattle of 58 breeds using whole genome sequencing datasets. In total, 47 355 high-confidence eccDNAs were identified and covered 4.6% of the cattle autosomes in length. Similarly to other species, the cattle eccDNA preferentially located in the genic and repeat sequences. Cattle eccDNAs contained complete sequences of 661 genes, which were significantly (p < 0.05) enriched in immunity-related functions. The eccDNA was further proved to have inverted repeats on the boundaries, which contained a high proportion of A/T and ranged from 4 to 17 bp. Interestingly, we successfully separated animals according to their geographical distributions and their tissues where DNA was isolated. This implied possible roles for eccDNA in cattle selection and tissue development. Our study supplies basic knowledges on eccDNAs in cattle, which will promote understanding of extrachromosomal DNA.
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Affiliation(s)
- Fan Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Lv Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Jiazheng Han
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Xiaotao Han
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Lingwei Peng
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Yuqin Du
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Han Xia
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China
| | - Liguo Yang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China.,National Center for International Research on Animal Genetics, Breeding and Reproduction, Huazhong Agricultural University, Wuhan, China.,Frontiers Science Center for Animal Breeding and Sustainable Production, Huazhong Agricultural University, Wuhan, China
| | - Yang Zhou
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan, China.,National Center for International Research on Animal Genetics, Breeding and Reproduction, Huazhong Agricultural University, Wuhan, China.,Frontiers Science Center for Animal Breeding and Sustainable Production, Huazhong Agricultural University, Wuhan, China
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Extrachromosomal circular DNA: biogenesis, structure, functions and diseases. Signal Transduct Target Ther 2022; 7:342. [PMID: 36184613 PMCID: PMC9527254 DOI: 10.1038/s41392-022-01176-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/14/2022] [Accepted: 09/01/2022] [Indexed: 11/08/2022] Open
Abstract
Extrachromosomal circular DNA (eccDNA), ranging in size from tens to millions of base pairs, is independent of conventional chromosomes. Recently, eccDNAs have been considered an unanticipated major source of somatic rearrangements, contributing to genomic remodeling through chimeric circularization and reintegration of circular DNA into the linear genome. In addition, the origin of eccDNA is considered to be associated with essential chromatin-related events, including the formation of super-enhancers and DNA repair machineries. Moreover, our understanding of the properties and functions of eccDNA has continuously and greatly expanded. Emerging investigations demonstrate that eccDNAs serve as multifunctional molecules in various organisms during diversified biological processes, such as epigenetic remodeling, telomere trimming, and the regulation of canonical signaling pathways. Importantly, its special distribution potentiates eccDNA as a measurable biomarker in many diseases, especially cancers. The loss of eccDNA homeostasis facilitates tumor initiation, malignant progression, and heterogeneous evolution in many cancers. An in-depth understanding of eccDNA provides novel insights for precision cancer treatment. In this review, we summarized the discovery history of eccDNA, discussed the biogenesis, characteristics, and functions of eccDNA. Moreover, we emphasized the role of eccDNA during tumor pathogenesis and malignant evolution. Therapeutically, we summarized potential clinical applications that target aberrant eccDNA in multiple diseases.
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Demystifying Extrachromosomal DNA Circles: Categories, Biogenesis, and Cancer Therapeutics. Comput Struct Biotechnol J 2022; 20:6011-6022. [PMID: 36382182 PMCID: PMC9647416 DOI: 10.1016/j.csbj.2022.10.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/21/2022] [Accepted: 10/21/2022] [Indexed: 12/01/2022] Open
Abstract
Since the advent of sequencing technologies in the 1990s, researchers have focused on the association between aberrations in chromosomal DNA and disease. However, not all forms of the DNA are linear and chromosomal. Extrachromosomal circular DNAs (eccDNAs) are double-stranded, closed-circled DNA constructs free from the chromosome that reside in the nuclei. Although widely overlooked, the eccDNAs have recently gained attention for their potential roles in physiological response, intratumoral heterogeneity and cancer therapeutics. In this review, we summarize the history, classifications, biogenesis, and highlight recent progresses on the emerging topic of eccDNAs and comment on their potential application as biomarkers in clinical settings.
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Zhou T, Ma S, Zhao Y, Guo D, Wang H, Kuang M, Li X. Identification and characterization of extrachromosomal circular DNA in alcohol induced osteonecrosis of femoral head. Front Genet 2022; 13:918379. [PMID: 36246642 PMCID: PMC9561878 DOI: 10.3389/fgene.2022.918379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
Alcohol-induced osteonecrosis of the femoral head (AIONFH) is a complicated refractory bone disease seen in the clinic. The pathogenesis of AIONFH is still controversial. Extrachromosomal circular DNA (eccDNA) elements have been indicated ubiquitously exist in eukaryotic genomes. However, the characteristics and biological functions of eccDNAs remain unclear in AIONFH. In this study, eccDNAs from AIONFH samples (n = 7) and fracture of femoral neck samples as a control (n = 7) were purified by removing linear DNA and rolling circle amplification. High-throughput sequencing and bioinformatics analysis were performed to study the characterization and biofunction of eccDNAs. We identified more than 600,000 unique eccDNAs. The number of detected eccDNAs in AIONFH was less than that in the control, and eccDNA formation may be related to transcription or other characteristics of coding genes. The eccDNA lengths are mainly distributed between 0.1 kb and 1 kb, with a major peak in 0.358 kb. The bioinformatic analysis showed that 25 significant genes were detected, including MAP3K1, ADCY1, CACNA1S, and MACF1, which contributed to regulating bone formation. GO and KEGG analyses suggested that the related genes derived from exons mainly affected metabolic processes and signal transduction, and bone metabolism-related pathways, such as the MAPK pathway and TGF-β pathway, were enriched. EccDNAs in AIONFH are common and may play an important role in pathogenesis by regulating bone metabolism.
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Affiliation(s)
- Tingting Zhou
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
| | - Shiqiang Ma
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
| | - Yunchao Zhao
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
| | - Donghui Guo
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
| | - Hengjun Wang
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
| | - Mingjie Kuang
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- *Correspondence: Xiaoming Li, ; Mingjie Kuang,
| | - Xiaoming Li
- Department of Orthopedics, Traditional Chinese Medicine-Western Medicine Hospital of Cangzhou City, Cangzhou, China
- Hebei Key Laboratory of Integrated Traditional and Western Medicine in Osteoarthrosis Research (Preparing), Cangzhou, China
- *Correspondence: Xiaoming Li, ; Mingjie Kuang,
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Sequence characterization of eccDNA content in glyphosate sensitive and resistant Palmer amaranth from geographically distant populations. PLoS One 2022; 17:e0260906. [PMID: 36103503 PMCID: PMC9473621 DOI: 10.1371/journal.pone.0260906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 08/30/2022] [Indexed: 11/19/2022] Open
Abstract
The discovery of non-chromosomal circular DNA offers new directions in linking genome structure with function in plant biology. Glyphosate resistance through EPSPS gene copy amplification in Palmer amaranth was due to an autonomously replicating extra-chromosomal circular DNA mechanism (eccDNA). CIDER-Seq analysis of geographically distant glyphosate sensitive (GS) and resistant (GR) Palmer Amaranth (Amaranthus palmeri) revealed the presence of numerous small extra-chromosomal circular DNAs varying in size and with degrees of repetitive content, coding sequence, and motifs associated with autonomous replication. In GS biotypes, only a small portion of these aligned to the 399 kb eccDNA replicon, the vehicle underlying gene amplification and genetic resistance to the herbicide glyphosate. The aligned eccDNAs from GS were separated from one another by large gaps in sequence. In GR biotypes, the eccDNAs were present in both abundance and diversity to assemble into a nearly complete eccDNA replicon. Mean sizes of eccDNAs were similar in both biotypes and were around 5kb with larger eccDNAs near 25kb. Gene content for eccDNAs ranged from 0 to 3 with functions that include ribosomal proteins, transport, metabolism, and general stress response genetic elements. Repeat content among smaller eccDNAs indicate a potential for recombination into larger structures. Genomic hotspots were also identified in the Palmer amaranth genome with a disposition for gene focal amplifications as eccDNA. The presence of eccDNA may serve as a reservoir of genetic heterogeneity in this species and may be functionally important for survival.
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Arrey G, Keating ST, Regenberg B. A unifying model for extrachromosomal circular DNA load in eukaryotic cells. Semin Cell Dev Biol 2022; 128:40-50. [PMID: 35292190 DOI: 10.1016/j.semcdb.2022.03.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/03/2022] [Accepted: 03/03/2022] [Indexed: 02/06/2023]
Abstract
Extrachromosomal circular DNA (eccDNA) with exons and whole genes are common features of eukaryotic cells. Work from especially tumours and the yeast Saccharomyces cerevisiae has revealed that eccDNA can provide large selective advantages and disadvantages. Besides the phenotypic effect due to expression of an eccDNA fragment, eccDNA is different from other mutations in that it is released from 1:1 segregation during cell division. This means that eccDNA can quickly change copy number, pickup secondary mutations and reintegrate into a chromosome to establish substantial genetic variation that could not have evolved via canonical mechanisms. We propose a unifying 5-factor model for conceptualizing the eccDNA load of a eukaryotic cell, emphasizing formation, replication, segregation, selection and elimination. We suggest that the magnitude of these sequential events and their interactions determine the copy number of eccDNA in mitotically dividing cells. We believe that our model will provide a coherent framework for eccDNA research, to understand its biology and the factors that can be manipulated to modulate eccDNA load in eukaryotic cells.
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Affiliation(s)
- Gerard Arrey
- Section for Ecology and Evolution, University of Copenhagen, Copenhagen, Denmark
| | - Samuel T Keating
- Section for Ecology and Evolution, University of Copenhagen, Copenhagen, Denmark
| | - Birgitte Regenberg
- Section for Ecology and Evolution, University of Copenhagen, Copenhagen, Denmark.
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Li R, Wang Y, Li J, Zhou X. Extrachromosomal circular DNA (eccDNA): an emerging star in cancer. Biomark Res 2022; 10:53. [PMID: 35883211 PMCID: PMC9327165 DOI: 10.1186/s40364-022-00399-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 07/13/2022] [Indexed: 02/08/2023] Open
Abstract
Extrachromosomal circular DNA (eccDNA) is defined as a type of circular DNA that exists widely in nature and is independent of chromosomes. EccDNA has attracted the attention of researchers due to its broad, random distribution, complex biogenesis and tumor-relevant functions. EccDNA can carry complete gene information, especially the oncogenic driver genes that are often carried in tumors, with increased copy number and high transcriptional activity. The high overexpression of oncogenes by eccDNA leads to malignant growth of tumors. Regardless, the exact generation and functional mechanisms of eccDNA in disease progression are not yet clear. There is, however, an emerging body of evidence characterizing that eccDNA can be generated from multiple pathways, including DNA damage repair pathways, breakage-fusion-bridge (BFB) mechanisms, chromothripsis and cell apoptosis, and participates in the regulation of tumor progression with multiplex functions. This up-to-date review summarizes and discusses the origins, biogenesis and functions of eccDNA, including its contribution to the formation of oncogene instability and mutations, the heterogeneity and cellular senescence of tumor cells, and the proinflammatory response of tumors. We highlight the possible cancer-related applications of eccDNA, such as its potential use in the diagnosis, targeted therapy and prognostic assessment of cancer.
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Affiliation(s)
- Ruomeng Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Ying Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, PR China.
| | - Xikun Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation Center for Biotherapy, Chengdu, 610041, China.
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Tatman PD, Black JC. Extrachromosomal Circular DNA from TCGA Tumors Is Generated from Common Genomic Loci, Is Characterized by Self-Homology and DNA Motifs near Circle Breakpoints. Cancers (Basel) 2022; 14:cancers14092310. [PMID: 35565439 PMCID: PMC9101409 DOI: 10.3390/cancers14092310] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 04/27/2022] [Accepted: 04/29/2022] [Indexed: 02/06/2023] Open
Abstract
Extrachromosomal circular DNA has emerged as a frequent genomic alteration in tumors. High numbers of circular DNAs correspond to poor prognosis suggesting an important function in tumor biology. However, despite mounting evidence supporting the importance of circular DNA, little is known about their production, maintenance, or selection. To provide insight into these processes, we analyzed circular DNA elements computationally identified in 355 TCGA tumors spanning 22 tumor types. Circular DNAs originated from common genomic loci irrespective of cancer type. Genes found in circularized genomic regions were more likely to be expressed and were enriched in cancer-related pathways. Finally, in support of a model for circle generation through either a homology or microhomology-mediated process, circles exhibit homology near their breakpoint. These breakpoints are also enriched in specific DNA motifs. Our analysis supports a model where gene-containing circles emerge from common, highly transcribed regions through a homology-mediated process.
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Wu X, Li P, Yimiti M, Ye Z, Fang X, Chen P, Gu Z. Identification and Characterization of Extrachromosomal Circular DNA in Plasma of Lung Adenocarcinoma Patients. Int J Gen Med 2022; 15:4781-4791. [PMID: 35592538 PMCID: PMC9113459 DOI: 10.2147/ijgm.s363425] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 04/21/2022] [Indexed: 12/15/2022] Open
Affiliation(s)
- Xiaoqiong Wu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Pu Li
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Maimaitiaili Yimiti
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Zhiqiu Ye
- Department of Pathology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Xuqian Fang
- Department of Pathology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
| | - Peizhan Chen
- Clinical Research Center, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
- Peizhan Chen, Clinical Research Center, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201821, People’s Republic of China, Tel +86 13918550745, Email
| | - Zhidong Gu
- Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People’s Republic of China
- Department of Laboratory Medicine, Ruijin-Hainan Hospital, Shanghai Jiao Tong University School of Medicine (Hainan Boao Research Hospital), Shanghai, People’s Republic of China
- Correspondence: Zhidong Gu, Department of Laboratory Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201821, People’s Republic of China, Tel +86 13801653534, Email
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Lv W, Pan X, Han P, Wang Z, Feng W, Xing X, Wang Q, Qu K, Zeng Y, Zhang C, Xu Z, Li Y, Zheng T, Lin L, Liu C, Liu X, Li H, Henriksen RA, Bolund L, Lin L, Jin X, Yang H, Zhang X, Yin T, Regenberg B, He F, Luo Y. Circle-Seq reveals genomic and disease-specific hallmarks in urinary cell-free extrachromosomal circular DNAs. Clin Transl Med 2022; 12:e817. [PMID: 35474296 PMCID: PMC9042798 DOI: 10.1002/ctm2.817] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 03/08/2022] [Accepted: 03/29/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Extrachromosomal circular deoxyribonucleic acid (eccDNA) is evolving as a valuable biomarker, while little is known about its presence in urine. METHODS Here, we report the discovery and analysis of urinary cell-free eccDNAs (ucf-eccDNAs) in healthy controls and patients with advanced chronic kidney disease (CKD) by Circle-Seq. RESULTS Millions of unique ucf-eccDNAs were identified and comprehensively characterised. The ucf-eccDNAs are GC-rich. Most ucf-eccDNAs are less than 1000 bp and are enriched in four pronounced peaks at 207, 358, 553 and 732 bp. Analysis of the genomic distribution of ucf-eccDNAs shows that eccDNAs are found on all chromosomes but enriched on chromosomes 17, 19 and 20 with a high density of protein-coding genes, CpG islands, short interspersed transposable elements (SINEs) and simple repeat elements. Analysis of eccDNA junction sequences further suggests that microhomology and palindromic repeats might be involved in eccDNA formation. The ucf-eccDNAs in CKD patients are significantly higher than those in healthy controls. Moreover, eccDNA with miRNA genes is highly enriched in CKD ucf-eccDNA. CONCLUSIONS This work discovers and provides the first deep characterisation of ucf-eccDNAs and suggests ucf-eccDNA as a valuable noninnvasive biomarker for urogenital disorder diagnosis and monitoring.
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Affiliation(s)
- Wei Lv
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,IBMC-BGI Center, the Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China
| | - Xiaoguang Pan
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Peng Han
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Ziyu Wang
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,Department of Biochemistry and Molecular Biology, School of Basic Medicine, Qingdao University, Qingdao, Shandong, China
| | - Weijia Feng
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Xue Xing
- Department of Nephrology, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingqing Wang
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China
| | - Kunli Qu
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Yuchen Zeng
- IBMC-BGI Center, the Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China.,College of Life Sciences, Tianjin University, Tianjin, China
| | - Cailin Zhang
- Department of Nephrology, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhe Xu
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Yi Li
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China
| | - Tianyu Zheng
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Ling Lin
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Chengxun Liu
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Xuemei Liu
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Hanbo Li
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Rasmus Amund Henriksen
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark.,Section for GeoGenetics, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
| | - Lars Bolund
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,BGI-Shenzhen, Shenzhen, China.,Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Lin Lin
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
| | - Xin Jin
- BGI-Shenzhen, Shenzhen, China
| | - Huanming Yang
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,IBMC-BGI Center, the Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China.,Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,Guangdong Provincial Academician Workstation of BGI Synthetic Genomics, BGI-Shenzhen, Shenzhen, China
| | - Xiuqing Zhang
- College of Life Sciences, University of Chinese Academy of Science, Beijing, China.,IBMC-BGI Center, the Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China.,BGI-Shenzhen, Shenzhen, China
| | - Tailang Yin
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - Birgitte Regenberg
- Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Fan He
- Department of Nephrology, Tongji Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yonglun Luo
- IBMC-BGI Center, the Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, China.,Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China.,BGI-Shenzhen, Shenzhen, China.,Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus, Denmark
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Pang J, Pan X, Lin L, Li L, Yuan S, Han P, Ji X, Li H, Wang C, Chu Z, Wu H, Fan G, Du X, Ji A. Characterization of Plasma Extrachromosomal Circular DNA in Gouty Arthritis. Front Genet 2022; 13:859513. [PMID: 35464862 PMCID: PMC9019587 DOI: 10.3389/fgene.2022.859513] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 03/22/2022] [Indexed: 11/15/2022] Open
Abstract
Objective: Extrachromosomal circular DNA elements (eccDNAs) are known for their broad existence in cells and plasma, which may potentially play important roles in many biological processes. Our aim was to identify potentially functional or marked eccDNAs in gout patients. Methods: The Circle-Seq approach was applied for eccDNA detection from plasma in acute gout patients and healthy controls. Further analysis was performed on the distribution of genomic elements and eccDNA gene annotations in two groups. Results: We detected 57,216 and 109,683 eccDNAs from the acute gout and healthy control plasma, respectively. EccDNAs were mapped to the reference genome to identify diverse classes of genomic elements and there was no significant difference of eccDNAs on genomic element annotation between gout and control group. A total of 256 eccDNA-associated genes were detected as gout unique eccDNA genes, including COL1A1 and EPB42, which potentially contribute to hyperuricemia and gout, and a couple of genes involved in inflammation or immune response. Enrichment analysis showed that these eccDNA genes were highly correlated with defense response, stress response, and immune and inflammatory responses, including T cell receptor signaling pathway, Fc epsilon RI signaling pathway, and JAK-STAT signaling pathway. Conclusion: Our discovery reveals the novel potential biological roles of plasma eccDNAs in gouty arthritis.
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Affiliation(s)
- Jingyuan Pang
- Medical School, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Xiaoguang Pan
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Ling Lin
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Lei Li
- BGI-Qingdao, BGI-Shenzhen, Qingdao, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Shuai Yuan
- Emergency Department, Qingdao Third People's Hospital, Qingdao, China
| | - Peng Han
- Lars Bolund Institute of Regenerative Medicine, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao, China
| | - Xiaopeng Ji
- Shandong Provincial Key Laboratory of Metabolic Diseases and Qingdao Key Laboratory of Gout, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Hailong Li
- Shandong Provincial Key Laboratory of Metabolic Diseases and Qingdao Key Laboratory of Gout, The Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Metabolic Diseases, Qingdao University, Qingdao, China
| | - Can Wang
- Shandong Provincial Key Laboratory of Metabolic Diseases and Qingdao Key Laboratory of Gout, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Zhaobin Chu
- BGI-Qingdao, BGI-Shenzhen, Qingdao, China.,College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Haoru Wu
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin, China
| | - Guangyi Fan
- BGI-Qingdao, BGI-Shenzhen, Qingdao, China.,BGI-Shenzhen, Shenzhen, China
| | - Xiao Du
- BGI-Qingdao, BGI-Shenzhen, Qingdao, China.,BGI-Shenzhen, Shenzhen, China
| | - Aichang Ji
- Shandong Provincial Key Laboratory of Metabolic Diseases and Qingdao Key Laboratory of Gout, The Affiliated Hospital of Qingdao University, Qingdao, China.,Institute of Metabolic Diseases, Qingdao University, Qingdao, China
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48
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Provasek VE, Mitra J, Malojirao VH, Hegde ML. DNA Double-Strand Breaks as Pathogenic Lesions in Neurological Disorders. Int J Mol Sci 2022; 23:ijms23094653. [PMID: 35563044 PMCID: PMC9099445 DOI: 10.3390/ijms23094653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/19/2022] [Accepted: 04/19/2022] [Indexed: 02/07/2023] Open
Abstract
The damage and repair of DNA is a continuous process required to maintain genomic integrity. DNA double-strand breaks (DSBs) are the most lethal type of DNA damage and require timely repair by dedicated machinery. DSB repair is uniquely important to nondividing, post-mitotic cells of the central nervous system (CNS). These long-lived cells must rely on the intact genome for a lifetime while maintaining high metabolic activity. When these mechanisms fail, the loss of certain neuronal populations upset delicate neural networks required for higher cognition and disrupt vital motor functions. Mammalian cells engage with several different strategies to recognize and repair chromosomal DSBs based on the cellular context and cell cycle phase, including homologous recombination (HR)/homology-directed repair (HDR), microhomology-mediated end-joining (MMEJ), and the classic non-homologous end-joining (NHEJ). In addition to these repair pathways, a growing body of evidence has emphasized the importance of DNA damage response (DDR) signaling, and the involvement of heterogeneous nuclear ribonucleoprotein (hnRNP) family proteins in the repair of neuronal DSBs, many of which are linked to age-associated neurological disorders. In this review, we describe contemporary research characterizing the mechanistic roles of these non-canonical proteins in neuronal DSB repair, as well as their contributions to the etiopathogenesis of selected common neurological diseases.
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Affiliation(s)
- Vincent E. Provasek
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- College of Medicine, Texas A&M University, College Station, TX 77843, USA
| | - Joy Mitra
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- Correspondence: (J.M.); (M.L.H.)
| | - Vikas H. Malojirao
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
| | - Muralidhar L. Hegde
- Department of Neurosurgery, Center for Neuroregeneration, Houston Methodist Research Institute, Houston, TX 77030, USA; (V.E.P.); (V.H.M.)
- College of Medicine, Texas A&M University, College Station, TX 77843, USA
- Department of Neurosciences, Weill Cornell Medical College, New York, NY 11021, USA
- Correspondence: (J.M.); (M.L.H.)
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49
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Wu P, Liu Y, Zhou R, Liu L, Zeng H, Xiong F, Zhang S, Gong Z, Zhang W, Guo C, Wang F, Zhou M, Zu X, Zeng Z, Li Y, Li G, Huang H, Xiong W. Extrachromosomal Circular DNA: A New Target in Cancer. Front Oncol 2022; 12:814504. [PMID: 35494014 PMCID: PMC9046939 DOI: 10.3389/fonc.2022.814504] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Accepted: 03/17/2022] [Indexed: 12/12/2022] Open
Abstract
Genomic instability and amplification are intrinsically important traits determining the development and heterogeneity of tumors. The role of extrachromosomal circular DNA (eccDNA) in tumors has recently been highlighted. EccDNAs are unique genetic materials located off the chromosomal DNA. They have been detected in a variety of tumors. This review analyzes the mechanisms involved in the formation of eccDNAs and their genetic characteristics. In addition, the high-copy number and transcriptional levels of oncogenes located in eccDNA molecules contribute to the acceleration of tumor evolution and drug resistance and drive the development of genetic heterogeneity. Understanding the specific genomic forms of eccDNAs and characterizing their potential functions will provide new strategies for tumor therapy. Further research may yield new targets and molecular markers for the early diagnosis and treatment of human cancer.
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Affiliation(s)
- Pan Wu
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yuhang Liu
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Ruijia Zhou
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lingyun Liu
- Cancer Research Institute, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Hongli Zeng
- Cancer Research Institute, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Fang Xiong
- Department of Stomatology, Xiangya Hospital, Central South University, Changsha, China
| | - Shanshan Zhang
- Department of Stomatology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhaojian Gong
- Department of Oral and Maxillofacial Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Wenling Zhang
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Can Guo
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Fuyan Wang
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Ming Zhou
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Xuyu Zu
- Cancer Research Institute, The First Affiliated Hospital, University of South China, Hengyang, China
| | - Zhaoyang Zeng
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Yong Li
- Department of Medicine, Dan L Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, United States
| | - Guiyuan Li
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - He Huang
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: He Huang, ; Wei Xiong,
| | - Wei Xiong
- NHC Key Laboratory of Carcinogenesis and Hunan Key Laboratory of Translational Radiation Oncology, Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
- Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: He Huang, ; Wei Xiong,
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50
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Cen Y, Fang Y, Ren Y, Hong S, Lu W, Xu J. Global characterization of extrachromosomal circular DNAs in advanced high grade serous ovarian cancer. Cell Death Dis 2022; 13:342. [PMID: 35418185 PMCID: PMC9007969 DOI: 10.1038/s41419-022-04807-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 03/21/2022] [Accepted: 03/30/2022] [Indexed: 01/02/2023]
Abstract
High grade serous ovarian cancer (HGSOC) is the most aggressive subtype of ovarian cancer and HGSOC patients often appear with metastasis, leading to the poor prognosis. Up to date, the extrachromosomal circular DNAs (eccDNAs) have been shown to be involved in cancer genome remodeling but the roles of eccDNAs in metastatic HGSOC are still not clear. Here we explored eccDNA profiles in HGSOC by Circle-Sequencing analysis using four pairs of primary and metastatic tissues of HGSOC patients. Within the differentially expressed eccDNAs screened out by our analysis, eight candidates were validated by outward PCR and qRT-PCR analysis. Among them, DNMT1circle10302690-10302961 was further confirmed by FISH assay and BaseScope assay, as the most significantly down-regulated eccDNA in metastatic tumors of HGSOC. Lower expression of DNMT1circle10302690-10302961 in both primary and metastatic tumors was associated with worse prognosis of HGSOC. Taken together, our finding firstly demonstrated the eccDNAs landscape of primary and metastatic tissues of HGSOC. The eccDNA DNMT1circle10302690-10302961 can be considered as a potential biomarker or a therapeutically clinical target of HGSOC metastasis and prognosis.
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Affiliation(s)
- Yixuan Cen
- Women's Reproductive Health Laboratory of Zhejiang Province; Women's Hospital; School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Yifeng Fang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Yan Ren
- Women's Reproductive Health Laboratory of Zhejiang Province; Women's Hospital; School of Medicine, Zhejiang University, Hangzhou, 310006, China
| | - Shiyuan Hong
- Institute of Life Sciences, Chongqing Medical University, Chongqing, 400016, China.
| | - Weiguo Lu
- Women's Reproductive Health Laboratory of Zhejiang Province; Women's Hospital; School of Medicine, Zhejiang University, Hangzhou, 310006, China. .,Department of Gynecologic Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China. .,Cancer Center, Zhejiang University, Hangzhou, 310058, China.
| | - Junfen Xu
- Women's Reproductive Health Laboratory of Zhejiang Province; Women's Hospital; School of Medicine, Zhejiang University, Hangzhou, 310006, China. .,Department of Gynecologic Oncology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China.
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