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Peruhova M, Banova-Chakarova S, Miteva DG, Velikova T. Genetic screening of liver cancer: State of the art. World J Hepatol 2024; 16:716-730. [PMID: 38818292 PMCID: PMC11135278 DOI: 10.4254/wjh.v16.i5.716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/14/2024] [Accepted: 04/09/2024] [Indexed: 05/22/2024] Open
Abstract
Liver cancer, primarily hepatocellular carcinoma, remains a global health challenge with rising incidence and limited therapeutic options. Genetic factors play a pivotal role in the development and progression of liver cancer. This state-of-the-art paper provides a comprehensive review of the current landscape of genetic screening strategies for liver cancer. We discuss the genetic underpinnings of liver cancer, emphasizing the critical role of risk-associated genetic variants, somatic mutations, and epigenetic alterations. We also explore the intricate interplay between environmental factors and genetics, highlighting how genetic screening can aid in risk stratification and early detection via using liquid biopsy, and advancements in high-throughput sequencing technologies. By synthesizing the latest research findings, we aim to provide a comprehensive overview of the state-of-the-art genetic screening methods for liver cancer, shedding light on their potential to revolutionize early detection, risk assessment, and targeted therapies in the fight against this devastating disease.
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Affiliation(s)
- Milena Peruhova
- Department of Gastroenterology, University Hospital "Heart and Brain", Burgas 8000, Bulgaria
| | - Sonya Banova-Chakarova
- Department of Gastroenterology, University Hospital "Heart and Brain", Burgas 8000, Bulgaria.
| | - Dimitrina Georgieva Miteva
- Department of Genetics, Faculty of Biology, Sofia University" St. Kliment Ohridski, Sofia 1164, Bulgaria
| | - Tsvetelina Velikova
- Medical Faculty, Sofia University St. Kliment Ohridski, Sofia 1407, Bulgaria
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2
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Binothman N, Aljadani M, Alghanem B, Refai MY, Rashid M, Al Tuwaijri A, Alsubhi NH, Alrefaei GI, Khan MY, Sonbul SN, Aljoud F, Alhayyani S, Abdulal RH, Ganash M, Hashem AM. Identification of novel interacts partners of ADAR1 enzyme mediating the oncogenic process in aggressive breast cancer. Sci Rep 2023; 13:8341. [PMID: 37221310 PMCID: PMC10206070 DOI: 10.1038/s41598-023-35517-6] [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: 12/12/2022] [Accepted: 05/19/2023] [Indexed: 05/25/2023] Open
Abstract
Triple-negative breast cancer (TNBC) subtype is characterized by aggressive clinical behavior and poor prognosis patient outcomes. Here, we show that ADAR1 is more abundantly expressed in infiltrating breast cancer (BC) tumors than in benign tumors. Further, ADAR1 protein expression is higher in aggressive BC cells (MDA-MB-231). Moreover, we identify a novel interacting partners proteins list with ADAR1 in MDA-MB-231, using immunoprecipitation assay and mass spectrometry. Using iLoop, a protein-protein interaction prediction server based on structural features, five proteins with high iloop scores were discovered: Histone H2A.V, Kynureninase (KYNU), 40S ribosomal protein SA, Complement C4-A, and Nebulin (ranged between 0.6 and 0.8). In silico analysis showed that invasive ductal carcinomas had the highest level of KYNU gene expression than the other classifications (p < 0.0001). Moreover, KYNU mRNA expression was shown to be considerably higher in TNBC patients (p < 0.0001) and associated with poor patient outcomes with a high-risk value. Importantly, we found an interaction between ADAR1 and KYNU in the more aggressive BC cells. Altogether, these results propose a new ADAR-KYNU interaction as potential therapeutic targeted therapy in aggressive BC.
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Affiliation(s)
- Najat Binothman
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia.
- Vaccine and Immunotherapy Unit, King Fahad Medical Research Center, King Abdulaziz University Saudi Arabia, Jeddah, Saudi Arabia.
| | - Majidah Aljadani
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Bandar Alghanem
- Medical Research Core Facility and Platforms (MRCFP), King Abdullah International Medical Research Center/King Saud bin Abdulaziz University for Health Sciences (KSAU-HS), King Abdulaziz Medical City (KAMC), National Guard Health Affairs (NGHA), Riyadh, Saudi Arabia
| | - Mohammed Y Refai
- Department of Biochemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Mamoon Rashid
- Department of AI and Bioinformatics, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences (KSAU-HS), King Abdulaziz Medical City, Ministry of National Guard Health Affairs, P.O. Box 22490, Riyadh, 11426, Saudi Arabia
| | - Abeer Al Tuwaijri
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), Ministry of National Guard Health Affairs (MNGH), Riyadh, Saudi Arabia
- Clinical Laboratory Sciences Department, College of Applied Medical Sciences, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Nouf H Alsubhi
- Biological Sciences Department, College of Science & Arts, King Abdulaziz University, Rabigh, 21911, Saudi Arabia
| | - Ghadeer I Alrefaei
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Muhammad Yasir Khan
- Vaccine and Immunotherapy Unit, King Fahad Medical Research Center, King Abdulaziz University Saudi Arabia, Jeddah, Saudi Arabia
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Sultan N Sonbul
- Biochemistry Department, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Experimental Biochemistry Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fadwa Aljoud
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
- Regenerative Medicine Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Sultan Alhayyani
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Rwaa H Abdulal
- Vaccine and Immunotherapy Unit, King Fahad Medical Research Center, King Abdulaziz University Saudi Arabia, Jeddah, Saudi Arabia
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Magdah Ganash
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Anwar M Hashem
- Vaccine and Immunotherapy Unit, King Fahad Medical Research Center, King Abdulaziz University Saudi Arabia, Jeddah, Saudi Arabia
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King AbdulAziz University, Jeddah, Saudi Arabia
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Zeng J, Han L, Wang T, Huang L, Zheng Y, Zhang N, Li Z, Yang M. The Allelic Expression of RNA Editing Gene ADARB1 in Hepatocellular Carcinoma Treated with Transarterial Chemoembolization. Pharmgenomics Pers Med 2023; 16:229-238. [PMID: 36970122 PMCID: PMC10032144 DOI: 10.2147/pgpm.s402115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
Introduction Transarterial chemoembolization (TACE) is the commonly used therapy of unresectable hepatocellular carcinoma (HCC), though the prognosis of different TACE-treated HCC patients varies, which may be due to the heterogeneity of HCC tumors caused by genetic variants and epigenetic changes such as RNA editing. There is dysregulated RNA adenosine-to-inosine (A-to-I) editing in HCC and RNA-edited genes are involved in the epigenetic process. It remains unclear how genetic variants of RNA editing genes affect the prognosis of HCC cases treated by TACE. Methods In this study, we examined 28 potentially functional single-nucleotide polymorphisms (SNPs) of four RNA editing genes (ADARB1, ADAR, ADARB2 and AIMP2) in two independent TACE patient cohorts. Results We found that ADARB1 rs1051367 and rs2253763 polymorphisms were markedly associated with the prognosis of HCC cases who received TACE in both cohorts. In HCC cells, the rs2253763 C-to-T change in ADARB1 3'-untranslated region attenuated its binding with miR-542-3p and allele-specifically elevated ADARB1 levels. Consistent with this, patients carrying the rs2253763 C allele showed reduced ADARB1 expression in cancer tissues and notably shorter survival after TACE therapy in comparison with individuals with the T allele. Ectopic ADARB1 profoundly enhanced the efficacy of oxaliplatin, one of the common TACE chemotherapeutic drugs. Discussion Our findings highlighted the value of ADARB1 polymorphisms as prognostic markers in TACE therapy for HCC patients. Notably, our findings revealed that targeting the ADARB1 enzyme may be a promising therapeutic strategy in combination with TACE for HCC cases.
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Affiliation(s)
- Jiajia Zeng
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
| | - Linyu Han
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
| | - Teng Wang
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
| | - Linying Huang
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
| | - Yanxiu Zheng
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
| | - Nasha Zhang
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, People’s Republic of China
| | - Ziqiang Li
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, People’s Republic of China
- Ziqiang Li, Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, Shandong Province, 250114, People’s Republic of China, Email
| | - Ming Yang
- Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, People’s Republic of China
- Correspondence: Ming Yang, Shandong Provincial Key Laboratory of Radiation Oncology, Cancer Research Center, Shandong Cancer Hospital and Institute, Jinan, Shandong Province, 250117, People’s Republic of China, Tel/Fax +86531-67626536, Email
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Gao C, Zhou G, Shi J, Shi P, Jin L, Li Y, Wang X, Liao S, Yan H, Wu J, Lu Y, Zhai Y, Zhang J, Zhang H, Zhang H, Yang C, Cao P, Cheng S, Zhou G. The A-to-I editing of KPC1 promotes intrahepatic cholangiocarcinoma by attenuating proteasomal processing of NF-κB1 p105 to p50. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2022; 41:338. [PMID: 36476255 PMCID: PMC9730630 DOI: 10.1186/s13046-022-02549-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Aberrant RNA editing of adenosine-to-inosine (A-to-I) has been linked to multiple human cancers, but its role in intrahepatic cholangiocarcinoma (iCCA) remains unknown. We conducted an exome-wide investigation to search for dysregulated RNA editing that drive iCCA pathogenesis. METHODS An integrative whole-exome and transcriptome sequencing analysis was performed to elucidate the RNA editing landscape in iCCAs. Putative RNA editing sites were validated by Sanger sequencing. In vitro and in vivo experiments were used to assess the effects of an exemplary target gene Kip1 ubiquitination-promoting complex 1 (KPC1) and its editing on iCCA cells growth and metastasis. Crosstalk between KPC1 RNA editing and NF-κB signaling was analyzed by molecular methods. RESULTS Through integrative omics analyses, we revealed an adenosine deaminases acting on RNA 1A (ADAR1)-mediated over-editing pattern in iCCAs. ADAR1 is frequently amplified and overexpressed in iCCAs and plays oncogenic roles. Notably, we identified a novel ADAR1-mediated A-to-I editing of KPC1 transcript, which results in substitution of methionine with valine at residue 8 (p.M8V). KPC1 p.M8V editing confers loss-of-function phenotypes through blunting the tumor-suppressive role of wild-type KPC1. Mechanistically, KPC1 p.M8V weakens the affinity of KPC1 to its substrate NF-κB1 p105, thereby reducing the ubiquitinating and proteasomal processing of p105 to p50, which in turn enhances the activity of oncogenic NF-κB signaling. CONCLUSIONS Our findings established that amplification-driven ADAR1 overexpression results in overediting of KPC1 p.M8V in iCCAs, leading to progression via activation of the NF-κB signaling pathway, and suggested ADAR1-KPC1-NF-κB axis as a potential therapeutic target for iCCA.
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Affiliation(s)
- Chengming Gao
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Guangming Zhou
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Jie Shi
- grid.414375.00000 0004 7588 8796Eastern Hepatobiliary Surgery Hospital, Navy Military Medical University, 225 Changhai Road, Shanghai, 200433 China
| | - Peipei Shi
- grid.256885.40000 0004 1791 4722Hebei University, Baoding City, China
| | - Liang Jin
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Yuanfeng Li
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Xiaowen Wang
- grid.419611.a0000 0004 0457 9072State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Lifeomics, Beijing, China
| | - Song Liao
- grid.488137.10000 0001 2267 2324Medical School of Chinese PLA, Beijing, China
| | - Han Yan
- grid.256885.40000 0004 1791 4722Hebei University, Baoding City, China
| | - Junjie Wu
- grid.186775.a0000 0000 9490 772XAnhui Medical University, Hefei City, China
| | - Yiming Lu
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Yun Zhai
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Jinxu Zhang
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China ,grid.419611.a0000 0004 0457 9072State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Lifeomics, Beijing, China
| | - Haitao Zhang
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Hongxing Zhang
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China ,grid.419611.a0000 0004 0457 9072State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Lifeomics, Beijing, China
| | - Chenning Yang
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Pengbo Cao
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China
| | - Shuqun Cheng
- grid.414375.00000 0004 7588 8796Eastern Hepatobiliary Surgery Hospital, Navy Military Medical University, 225 Changhai Road, Shanghai, 200433 China
| | - Gangqiao Zhou
- grid.506261.60000 0001 0706 7839State Key Laboratory of Proteomics, National Center for Protein Sciences at Beijing, Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing, 100850 China ,grid.256885.40000 0004 1791 4722Hebei University, Baoding City, China ,grid.186775.a0000 0000 9490 772XAnhui Medical University, Hefei City, China ,grid.89957.3a0000 0000 9255 8984Collaborative Innovation Center for Personalized Cancer Medicine, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing City, China
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5
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A-to-I RNA editing of BLCAP promotes cell proliferation by losing the inhibitory of Rb1 in colorectal cancer. Exp Cell Res 2022; 417:113209. [DOI: 10.1016/j.yexcr.2022.113209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/03/2022] [Accepted: 05/14/2022] [Indexed: 11/23/2022]
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Baker AR, Miliotis C, Ramírez-Moya J, Marc T, Vlachos IS, Santisteban P, Slack FJ. Transcriptome profiling of ADAR1 targets in triple-negative breast cancer cells reveals mechanisms for regulating growth and invasion. Mol Cancer Res 2022; 20:960-971. [PMID: 35247916 DOI: 10.1158/1541-7786.mcr-21-0604] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 12/23/2021] [Accepted: 02/28/2022] [Indexed: 11/16/2022]
Abstract
ADARs catalyze Adenosine-to-Inosine (A-to-I) editing of double-stranded RNA and regulate global gene expression output through interactions with RNA and other proteins. ADARs play important roles in development and disease, and previous work has shown that ADAR1 is oncogenic in a growing list of cancer types. Here we show that ADAR1 is a critical gene for triple-negative breast cancer cells, as ADAR1 loss results in reduced growth (viability and cell cycle progression), invasion, and mammosphere formation. Whole transcriptome sequencing analyses demonstrate that ADAR1 regulates both coding and non-coding targets by altering gene expression level, A-to-I editing, and splicing. We determine that a recoding edit in filamin B (FLNB chr3:58156064) reduces the tumor suppressive activities of the protein to promote growth and invasion. We also show that several tumor suppressor microRNAs are upregulated upon ADAR1 loss and suppress cell cycle progression and invasion. Implications: This work describes several novel mechanisms of ADAR1-mediated oncogenesis in triple-negative breast cancer, providing support to strategies targeting ADAR1 in this aggressive cancer type that has few treatment options.
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Affiliation(s)
| | | | - Julia Ramírez-Moya
- Boston Children's Hospital / Harvard Medical School, Boston, MA, United States
| | | | | | - Pilar Santisteban
- Instituto de Investigaciones Biomedicas CSIC/UAM, Madrid, Madrid, Spain
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7
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Mohamad MI, Desoky IA, Ahmed Zaki K, Sadek DR, Kamal Kassim S, Abdel-Wahab Mohamed D. Pterostilbene ameliorates the disrupted Adars expression and improves liver fibrosis in DEN-induced liver injury in Wistar rats: A novel potential effect. Gene 2021; 813:146124. [PMID: 34921950 DOI: 10.1016/j.gene.2021.146124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/25/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022]
Abstract
The knowledge of RNA editing modifications and its subsequent proteomic diversity in is still limited and represents only the tip of the iceberg. Adenosine to inosine (A-to-I) RNA editing is the most prevalent in RNA editome with a rising role for ADARgene family as a major regulator of the dynamic landscape of RNA editing. This study aimed at evaluating the potential chemopreventive effects of the epigenetic regulator "pterostilbene" in diethylnitrosamine (DEN)-exposedrat model. Consequently, the hepatic Adars expression was investigated as a possible mechanism for mediation of the putative pterostilbene-induced chemopreventive effect. The effects of administration of pterostilbene were investigated on the structural changes, immunohistochemical staining, liver function test, serum alpha feto-protein (AFP), IL-6, and hepatic Adar1 and Adar2 relative gene expression at the beginning and at the 6th week of the study. Pterostilbene attenuated DEN-induced liver injury, improves hepatocyte parrafin-1 (Hep Par-1), decreases heat shock protein 70 (HSP70), improved AFP, serum albumin, transaminases, IL-6 with alleviation of disturbed hepatic Adar1 and Adar2 expression. This study spotlights the role of pterostilbene in attenuation of DEN-induced liver injury which could be mediated, at least partially, through the alleviation of the aberrant expression of Adar enzymes. Yet, more in-depth studies are needed to further elucidate the molecular mechanisms underlying the effects of pterostilbene on RNA editing enzymes.
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Affiliation(s)
- Magda I Mohamad
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Ain Shams University, Cairo, Egypt.
| | - Islam A Desoky
- Department of Biochemistry, Faculty of Medicine, Misr University for Science and Technology, Giza, Egypt
| | - Kamelia Ahmed Zaki
- Department of Biochemistry, Faculty of Medicine, Misr University for Science and Technology, Giza, Egypt
| | - Doaa R Sadek
- Department of Histology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Samar Kamal Kassim
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Dalia Abdel-Wahab Mohamed
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Ain Shams University, Cairo, Egypt
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8
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Qiu J, Ma X, Zeng F, Yan J. RNA editing regulates lncRNA splicing in human early embryo development. PLoS Comput Biol 2021; 17:e1009630. [PMID: 34851956 PMCID: PMC8668112 DOI: 10.1371/journal.pcbi.1009630] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 12/13/2021] [Accepted: 11/11/2021] [Indexed: 01/13/2023] Open
Abstract
RNA editing is a co- or post-transcriptional modification through which some cells can make discrete changes to specific nucleotide sequences within an RNA molecule after transcription. Previous studies found that RNA editing may be critically involved in cancer and aging. However, the function of RNA editing in human early embryo development is still unclear. In this study, through analyzing single cell RNA sequencing data, 36.7% RNA editing sites were found to have a have differential editing ratio among early embryo developmental stages, and there was a great reprogramming of RNA editing rates at the 8-cell stage, at which most of the differentially edited RNA editing sites (99.2%) had a decreased RNA editing rate. In addition, RNA editing was more likely to occur on RNA splicing sites during human early embryo development. Furthermore, long non-coding RNA (lncRNA) editing sites were found more likely to be on RNA splicing sites (odds ratio = 2.19, P = 1.37×10-8), while mRNA editing sites were less likely (odds ratio = 0.22, P = 8.38×10-46). Besides, we found that the RNA editing rate on lncRNA had a significantly higher correlation coefficient with the percentage spliced index (PSI) of lncRNA exons (R = 0.75, P = 4.90×10-16), which indicated that RNA editing may regulate lncRNA splicing during human early embryo development. Finally, functional analysis revealed that those RNA editing-regulated lncRNAs were enriched in signal transduction, the regulation of transcript expression, and the transmembrane transport of mitochondrial calcium ion. Overall, our study might provide a new insight into the mechanism of RNA editing on lncRNAs in human developmental biology and common birth defects.
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Affiliation(s)
- Jiajun Qiu
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University, Shanghai, China
- NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, China
| | - Xiao Ma
- Group of Signal Transduction, Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Fanyi Zeng
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University, Shanghai, China
- NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, China
| | - Jingbin Yan
- Shanghai Children’s Hospital, Shanghai Institute of Medical Genetics, Shanghai Jiao Tong University, Shanghai, China
- NHC Key Laboratory of Medical Embryogenesis and Developmental Molecular Biology & Shanghai Key Laboratory of Embryo and Reproduction Engineering, Shanghai, China
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9
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Yang Y, Ma Y, Yuan M, Peng Y, Fang Z, Wang J. Identifying the biomarkers and pathways associated with hepatocellular carcinoma based on an integrated analysis approach. Liver Int 2021; 41:2485-2498. [PMID: 34033190 DOI: 10.1111/liv.14972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 05/11/2021] [Accepted: 05/19/2021] [Indexed: 02/13/2023]
Abstract
BACKGROUND AND AIMS Hepatocellular carcinoma (HCC) is one of the most common causes of cancer-related death worldwide. The molecular mechanism underlying HCC is still unclear. In this study, we conducted a comprehensive analysis to explore the genes, pathways and their interactions involved in HCC. METHODS We analysed the gene expression datasets corresponding to 488 samples from 10 studies on HCC and identified the genes differentially expressed in HCC samples. Then, the genes were compared against Phenolyzer and GeneCards to screen those potentially associated with HCC. The features of the selected genes were explored by mapping them onto the human protein-protein interaction network, and a subnetwork related to HCC was constructed. Hub genes in this HCC specific subnetwork were identified, and their relevance with HCC was investigated by survival analysis. RESULTS We identified 444 differentially expressed genes (177 upregulated and 267 downregulated) related to HCC. Functional enrichment analysis revealed that pathways like p53 signalling and chemical carcinogenesis were eriched in HCC genes. In the subnetwork related to HCC, five disease modules were detected. Further analysis identified six hub genes from the HCC specific subnetwork. Survival analysis showed that the expression levels of these genes were negatively correlated with survival rate of HCC patients. CONCLUSIONS Based on a systems biology framework, we identified the genes, pathways, as well as the disease specific network related to HCC. We also found novel biomarkers whose expression patterns were correlated with progression of HCC, and they could be candidates for further investigation.
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Affiliation(s)
- Yichen Yang
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China.,Tianjin Medical University Cancer Institute & Hospital, Tianjin, China
| | - Yuequn Ma
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Meng Yuan
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Yonglin Peng
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Zhonghai Fang
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
| | - Ju Wang
- School of Biomedical Engineering, Tianjin Medical University, Tianjin, China
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10
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Chen X, Zhang M, Li N, Pu R, Wu T, Ding Y, Cai P, Zhang H, Zhao J, Yin J, Cao G. Nucleotide variants in hepatitis B virus preS region predict the recurrence of hepatocellular carcinoma. Aging (Albany NY) 2021; 13:22256-22275. [PMID: 34534105 PMCID: PMC8507287 DOI: 10.18632/aging.203531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/03/2021] [Indexed: 02/07/2023]
Abstract
Background: Hepatitis B virus (HBV) variants in the preS region have been associated with hepatocellular carcinoma (HCC). However, the effect of the preS variants on HCC prognosis remains largely unknown. We aimed to identify the preS variants that reliably predict postoperative prognosis in HCC. Methods: RNA-seq data of 203 HCC patients retrieved from public database were screened for the preS variants related to HCC prognosis. The variants in the sera and tumors were then validated in our prospective cohort enrolling 103 HBV-associated HCC patients. Results: By analyzing prognosis-related gene sets in the RNA-seq data, 12 HBV preS variants were associated with HCC recurrence. Of those, G40C and C147T in the sera predicted an unfavorable recurrence-free survival in our cohort (hazard ratio [HR]=2.18, 95% confidence interval [CI]=1.37-3.47, p=0.001 for G40C; HR=1.84, 95% CI=1.15-2.92, p=0.012 for C147T). G40C and C147T were significantly associated with microscopic vascular invasion, larger tumor size, and abnormal liver function. Multivariate Cox regression analysis showed that G40C significantly increased the risk of HCC recurrence in patients with postoperative antiviral treatment. The HCC prognosis-prediction model consisting of α-fetoprotein and G40C in the sera achieved the best performance (sensitivity=0.80, specificity=0.70, and area under the curve=0.79). Functional analysis indicated that these two variants were associated with cell proliferation, chromosome instability, carcinogenesis, metastasis, and anticancer drug resistance. Conclusions: G40C and C147T are serological biomarkers for HCC prognosis and the prognostic model consisting of serological α-fetoprotein and G40C achieved the best performance in predicting postoperative prognosis.
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Affiliation(s)
- Xi Chen
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Minfeng Zhang
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Nan Li
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Rui Pu
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Ting Wu
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Yibo Ding
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Peng Cai
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Hongwei Zhang
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Jun Zhao
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Jianhua Yin
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
| | - Guangwen Cao
- Department of Epidemiology, Faculty of Navy Medicine, Second Military Medical University, Shanghai, China
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11
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Knutson SD, Arthur RA, Johnston HR, Heemstra JM. Direct Immunodetection of Global A-to-I RNA Editing Activity with a Chemiluminescent Bioassay. Angew Chem Int Ed Engl 2021; 60:17009-17017. [PMID: 33979483 PMCID: PMC8562906 DOI: 10.1002/anie.202102762] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/08/2021] [Indexed: 12/15/2022]
Abstract
Adenosine-to-inosine (A-to-I) editing is a conserved eukaryotic RNA modification that contributes to development, immune response, and overall cellular function. Here, we utilize Endonuclease V (EndoV), which binds specifically to inosine in RNA, to develop an EndoV-linked immunosorbency assay (EndoVLISA) as a rapid, plate-based chemiluminescent method for measuring global A-to-I editing signatures in cellular RNA. We first optimize and validate our assay with chemically synthesized oligonucleotides. We then demonstrate rapid detection of inosine content in treated cell lines, demonstrating equivalent performance against current standard RNA-seq approaches. Lastly, we deploy our EndoVLISA for profiling differential A-to-I RNA editing signatures in normal and diseased human tissue, illustrating the utility of our platform as a diagnostic bioassay. Together, the EndoVLISA method is cost-effective, straightforward, and utilizes common laboratory equipment, offering a highly accessible new approach for studying A-to-I editing. Moreover, the multi-well plate format makes this the first assay amenable for direct high-throughput quantification of A-to-I editing for applications in disease detection and drug development.
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Affiliation(s)
- Steve D Knutson
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, GA, 30322, USA
| | - Robert A Arthur
- Emory Integrated Computational Core, Emory University, 101 Woodruff Cir., Atlanta, GA, 30322, USA
- Department of Human Genetics, Emory University, 1365 Clifton Rd, Atlanta, GA, 30322, USA
| | - H Richard Johnston
- Emory Integrated Computational Core, Emory University, 101 Woodruff Cir., Atlanta, GA, 30322, USA
- Department of Human Genetics, Emory University, 1365 Clifton Rd, Atlanta, GA, 30322, USA
| | - Jennifer M Heemstra
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, GA, 30322, USA
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12
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Direct Immunodetection of Global A‐to‐I RNA Editing Activity with a Chemiluminescent Bioassay. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Tran SS, Zhou Q, Xiao X. Statistical inference of differential RNA-editing sites from RNA-sequencing data by hierarchical modeling. Bioinformatics 2020; 36:2796-2804. [PMID: 32003773 DOI: 10.1093/bioinformatics/btaa066] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 12/29/2019] [Accepted: 01/24/2020] [Indexed: 12/13/2022] Open
Abstract
MOTIVATION RNA-sequencing (RNA-seq) enables global identification of RNA-editing sites in biological systems and disease. A salient step in many studies is to identify editing sites that statistically associate with treatment (e.g. case versus control) or covary with biological factors, such as age. However, RNA-seq has technical features that incumbent tests (e.g. t-test and linear regression) do not consider, which can lead to false positives and false negatives. RESULTS In this study, we demonstrate the limitations of currently used tests and introduce the method, RNA-editing tests (REDITs), a suite of tests that employ beta-binomial models to identify differential RNA editing. The tests in REDITs have higher sensitivity than other tests, while also maintaining the type I error (false positive) rate at the nominal level. Applied to the GTEx dataset, we unveil RNA-editing changes associated with age and gender, and differential recoding profiles between brain regions. AVAILABILITY AND IMPLEMENTATION REDITs are implemented as functions in R and freely available for download at https://github.com/gxiaolab/REDITs. The repository also provides a code example for leveraging parallelization using multiple cores.
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Affiliation(s)
| | - Qing Zhou
- Bioinformatics Interdepartmental Program.,Department of Statistics
| | - Xinshu Xiao
- Bioinformatics Interdepartmental Program.,Department of Integrative Biology and Physiology.,Molecular Biology Institute.,Institute for Quantitative and Computational Biology, UCLA, Los Angeles, CA 90095, USA
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14
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Chen J, Wang L, Wang F, Liu J, Bai Z. Genomic Identification of RNA Editing Through Integrating Omics Datasets and the Clinical Relevance in Hepatocellular Carcinoma. Front Oncol 2020; 10:37. [PMID: 32117713 PMCID: PMC7033493 DOI: 10.3389/fonc.2020.00037] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/09/2020] [Indexed: 12/12/2022] Open
Abstract
RNA editing is a widespread post-transcriptional mechanism to introduce single nucleotide changes to RNA in human cancers. Here, we characterized the global RNA editing profiles of 373 hepatocellular carcinoma (HCC) and 50 adjacent normal liver samples from The Cancer Genome Atlas (TCGA) and revealed that most editing events tend to occur in minor percentage of samples with moderate editing degrees (20–30%). Moreover, these RNA editing prefer to be A-to-I RNA editing in protein coding genes, especially in 3′UTR regions. Considering the association between DNA mutation and RNA editing, our analysis found that RNA editing maybe a complementary event for DNA mutation of HCC risk genes in HCC patients. We next identified 454 HCC-related editing sites, and many locate on the same genes with the same editing patterns. The functional consequences of editing revealed 2,086 functional editing sites and demonstrated that most editing in coding regions are non-synonymous variations. Furthermore, our results showed that editing in the 3′UTR regions tend to influence miRNA–target binding, and the editing degree seems to be negatively correlated with gene expression. Finally, we found that 46 HCC-related editing sites with consequence are able to distinguish the prognosis differences of HCC patients, suggesting their clinical relevance. Together, our results highlight RNA editing as a valuable molecular resource for investigating HCC mechanisms and clinical treatments.
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Affiliation(s)
- Juan Chen
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Lu Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Fangbin Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Jian Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.,Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei, China
| | - Zhenyu Bai
- Department of Laboratory, General Hospital of Pingmei Shenma Medical Group, Pingdingshan, China
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15
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Kaur H, Dhall A, Kumar R, Raghava GPS. Identification of Platform-Independent Diagnostic Biomarker Panel for Hepatocellular Carcinoma Using Large-Scale Transcriptomics Data. Front Genet 2020; 10:1306. [PMID: 31998366 PMCID: PMC6967266 DOI: 10.3389/fgene.2019.01306] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/26/2019] [Indexed: 12/20/2022] Open
Abstract
The high mortality rate of hepatocellular carcinoma (HCC) is primarily due to its late diagnosis. In the past, numerous attempts have been made to design genetic biomarkers for the identification of HCC; unfortunately, most of the studies are based on small datasets obtained from a specific platform or lack reasonable validation performance on the external datasets. In order to identify a universal expression-based diagnostic biomarker panel for HCC that can be applicable across multiple platforms, we have employed large-scale transcriptomic profiling datasets containing a total of 2,316 HCC and 1,665 non-tumorous tissue samples. These samples were obtained from 30 studies generated by mainly four types of profiling techniques (Affymetrix, Illumina, Agilent, and High-throughput sequencing), which are implemented in a wide range of platforms. Firstly, we scrutinized overlapping 26 genes that are differentially expressed in numerous datasets. Subsequently, we identified a panel of three genes (FCN3, CLEC1B, and PRC1) as HCC biomarker using different feature selection techniques. Three-genes-based HCC biomarker identified HCC samples in training/validation datasets with an accuracy between 93 and 98%, Area Under Receiver Operating Characteristic curve (AUROC) in a range of 0.97 to 1.0. A reasonable performance, i.e., AUROC 0.91–0.96 achieved on validation dataset containing peripheral blood mononuclear cells, concurred their non-invasive utility. Furthermore, the prognostic potential of these genes was evaluated on TCGA-LIHC and GSE14520 cohorts using univariate survival analysis. This analysis revealed that these genes are prognostic indicators for various types of the survivals of HCC patients (e.g., Overall Survival, Progression-Free Survival, Disease-Free Survival). These genes significantly stratified high-risk and low-risk HCC patients (p-value <0.05). In conclusion, we identified a universal platform-independent three-genes-based biomarker that can predict HCC patients with high precision and also possess significant prognostic potential. Eventually, we developed a web server HCCpred based on the above study to facilitate scientific community (http://webs.iiitd.edu.in/raghava/hccpred/).
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Affiliation(s)
- Harpreet Kaur
- Bioinformatics Center, CSIR-Institute of Microbial Technology, Chandigarh, India.,Department of Computational Biology, Indraprastha Institute of Information Technology, New Delhi, India
| | - Anjali Dhall
- Department of Computational Biology, Indraprastha Institute of Information Technology, New Delhi, India
| | - Rajesh Kumar
- Bioinformatics Center, CSIR-Institute of Microbial Technology, Chandigarh, India.,Department of Computational Biology, Indraprastha Institute of Information Technology, New Delhi, India
| | - Gajendra P S Raghava
- Department of Computational Biology, Indraprastha Institute of Information Technology, New Delhi, India
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16
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Warner AD, Gevirtzman L, Hillier LW, Ewing B, Waterston RH. The C. elegans embryonic transcriptome with tissue, time, and alternative splicing resolution. Genome Res 2019; 29:1036-1045. [PMID: 31123079 PMCID: PMC6581053 DOI: 10.1101/gr.243394.118] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 03/11/2019] [Indexed: 12/22/2022]
Abstract
We have used RNA-seq in Caenorhabditis elegans to produce transcription profiles for seven specific embryonic cell populations from gastrulation to the onset of terminal differentiation. The expression data for these seven cell populations, covering major cell lineages and tissues in the worm, reveal the complex and dynamic changes in gene expression, both spatially and temporally. Also, within genes, start sites and exon usage can be highly differential, producing transcripts that are specific to developmental periods or cell lineages. We have also found evidence of novel exons and introns, as well as differential usage of SL1 and SL2 splice leaders. By combining this data set with the modERN ChIP-seq resource, we are able to support and predict gene regulatory relationships. The detailed information on differences and similarities between gene expression in cell lineages and tissues should be of great value to the community and provides a framework for the investigation of expression in individual cells.
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Affiliation(s)
- Adam D Warner
- Department of Genome Sciences, School of Medicine, University of Washington, Seattle, Washington 98195, USA
| | - Louis Gevirtzman
- Department of Genome Sciences, School of Medicine, University of Washington, Seattle, Washington 98195, USA
| | - LaDeana W Hillier
- Department of Genome Sciences, School of Medicine, University of Washington, Seattle, Washington 98195, USA
| | - Brent Ewing
- Department of Genome Sciences, School of Medicine, University of Washington, Seattle, Washington 98195, USA
| | - Robert H Waterston
- Department of Genome Sciences, School of Medicine, University of Washington, Seattle, Washington 98195, USA
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17
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Huang W, Skanderup AJ, Lee CG. Advances in genomic hepatocellular carcinoma research. Gigascience 2018; 7:5232228. [PMID: 30521023 PMCID: PMC6335342 DOI: 10.1093/gigascience/giy135] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/01/2018] [Indexed: 12/14/2022] Open
Abstract
Background Hepatocellular carcinoma (HCC) is the cancer with the second highest mortality in the world due to its late presentation and limited treatment options. As such, there is an urgent need to identify novel biomarkers for early diagnosis and to develop novel therapies. The availability of next-generation sequencing (NGS) data from tumors of liver cancer patients has provided us with invaluable resources to better understand HCC through the integration of data from different sources to facilitate the identification of promising biomarkers or therapeutic targets. Findings Here, we review key insights gleaned from more than 20 NGS studies of HCC tumor samples, comprising approximately 582 whole genomes and 1,211 whole exomes mainly from the East Asian population. Through consolidation of reported somatic mutations from multiple studies, we identified genes with different types of somatic mutations, including single nucleotide variations, insertion/deletions, structural variations, and copy number alterations as well as genes with multiple frequent viral integration. Pathway analysis showed that this curated list of somatic mutations is critically involved in cancer-related pathways, viral carcinogenesis, and signaling pathways. Lastly, we addressed the future directions of HCC research as more NGS datasets become available. Conclusions Our review is a comprehensive resource for the current NGS research in HCC, consolidating published articles, potential gene candidates, and their related biological pathways.
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Affiliation(s)
- Weitai Huang
- Computational and Systems Biology, Agency for Science Technology and Research, Genome Institute of Singapore, 60 Biopolis Street, Singapore 138672, Singapore.,Graduate School of Integrative Sciences and Engineering, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 117456, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore
| | - Anders Jacobsen Skanderup
- Computational and Systems Biology, Agency for Science Technology and Research, Genome Institute of Singapore, 60 Biopolis Street, Singapore 138672, Singapore
| | - Caroline G Lee
- Graduate School of Integrative Sciences and Engineering, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 117456, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077, Singapore.,Division of Medical Sciences, Humphrey Oei Institute of Cancer Research, National Cancer Center Singapore, Singapore 169610, Singapore.,Duke-NUS Graduate Medical School Singapore, Singapore 169547, Singapore
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18
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Yoo S, Wang W, Wang Q, Fiel MI, Lee E, Hiotis SP, Zhu J. A pilot systematic genomic comparison of recurrence risks of hepatitis B virus-associated hepatocellular carcinoma with low- and high-degree liver fibrosis. BMC Med 2017; 15:214. [PMID: 29212479 PMCID: PMC5719570 DOI: 10.1186/s12916-017-0973-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 11/08/2017] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Chronic hepatitis B virus (HBV) infection leads to liver fibrosis, which is a major risk factor in hepatocellular carcinoma (HCC) and an independent risk factor of recurrence after HCC tumor resection. The HBV genome can be inserted into the human genome, and chronic inflammation may trigger somatic mutations. However, how HBV integration and other genomic changes contribute to the risk of tumor recurrence with regards to the different degree of liver fibrosis is not clearly understood. METHODS We sequenced mRNAs of 21 pairs of tumor and distant non-neoplastic liver tissues of HBV-HCC patients and performed comprehensive genomic analyses of our RNAseq data and public available HBV-HCC sequencing data. RESULTS We developed a robust pipeline for sensitively identifying HBV integration sites based on sequencing data. Simulations showed that our method outperformed existing methods. Applying it to our data, 374 and 106 HBV host genes were identified in non-neoplastic liver and tumor tissues, respectively. When applying it to other RNA sequencing datasets, consistently more HBV integrations were identified in non-neoplastic liver than in tumor tissues. HBV host genes identified in non-neoplastic liver samples significantly overlapped with known tumor suppressor genes. More significant enrichment of tumor suppressor genes was observed among HBV host genes identified from patients with tumor recurrence, indicating the potential risk of tumor recurrence driven by HBV integration in non-neoplastic liver tissues. We also compared SNPs of each sample with SNPs in a cancer census database and inferred samples' pathogenic SNP loads. Pathogenic SNP loads in non-neoplastic liver tissues were consistently higher than those in normal liver tissues. Additionally, HBV host genes identified in non-neoplastic liver tissues significantly overlapped with pathogenic somatic mutations, suggesting that HBV integration and somatic mutations targeting the same set of genes are important to tumorigenesis. HBV integrations and pathogenic mutations showed distinct patterns between low and high liver fibrosis patients with regards to tumor recurrence. CONCLUSIONS The results suggest that HBV integrations and pathogenic SNPs in non-neoplastic tissues are important for tumorigenesis and different recurrence risk models are needed for patients with low and high degrees of liver fibrosis.
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Affiliation(s)
- Seungyeul Yoo
- Department of Genetics and Genomic Sciences, Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Wenhui Wang
- Department of Genetics and Genomic Sciences, Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Qin Wang
- Department of Surgery, Division of Surgical Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - M Isabel Fiel
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Eunjee Lee
- Department of Genetics and Genomic Sciences, Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.,Sema4, a Mount Sinai venture, Stamford, CT, USA
| | - Spiros P Hiotis
- Department of Surgery, Division of Surgical Oncology, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Jun Zhu
- Department of Genetics and Genomic Sciences, Icahn Institute of Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA. .,Sema4, a Mount Sinai venture, Stamford, CT, USA.
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19
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Peng L, Lee LJ, Xiong H, Su H, Rao J, Xiao D, He J, Wu K, Liu D. Characterization of RNA editome in primary and metastatic lung adenocarcinomas. Oncotarget 2017; 8:11517-11529. [PMID: 28009993 PMCID: PMC5355282 DOI: 10.18632/oncotarget.14076] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/21/2016] [Indexed: 12/01/2022] Open
Abstract
RNA editing results in post-transcriptional modification and could potentially contribute to carcinogenesis. However, RNA editing in advanced lung adenocarcinomas has not yet been studied. Based on whole genome and transcriptome sequencing data, we identified 1,071,296 RNA editing events from matched normal, primary and metastatic samples contributed by 24 lung adenocarcinoma patients, with 91.3% A-to-G editing on average, and found significantly more RNA editing sites in tumors than in normal samples. To investigate cancer relevant editing events, we detected 67,851 hyper-editing sites in primary and 50,480 hyper-editing sites in metastatic samples. 46 genes with hyper-editing in coding regions were found to result in amino acid alterations, while hundreds of hyper-editing events in non-coding regions could modulate splicing or gene expression, including genes related to tumor stage or clinic prognosis. Comparing RNA editome of primary and metastatic samples, we also discovered hyper-edited genes that may promote metastasis development. These findings showed a landscape of RNA editing in matched normal, primary and metastatic tissues of lung adenocarcinomas for the first time and provided new insights to understand the molecular characterization of this disease.
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Affiliation(s)
- Lihua Peng
- BGI Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.,BGI-Shenzhen, Shenzhen 518083, China
| | - Leo J Lee
- BGI-Shenzhen, Shenzhen 518083, China.,Department of Electrical and Computer Engineering, Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3G4, Canada
| | | | - Hong Su
- BGI-Shenzhen, Shenzhen 518083, China
| | | | - Dakai Xiao
- Department of Thoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China.,Guangzhou Institute of Respiratory Disease & State Key Laboratory of Respiratory Disease, Guangzhou 510120, China.,Research Center for Translational Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
| | - Jianxing He
- Department of Thoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China.,Guangzhou Institute of Respiratory Disease & State Key Laboratory of Respiratory Disease, Guangzhou 510120, China.,National Clinical Research Center for Respiratory Disease, Guangzhou 510120, China
| | - Kui Wu
- BGI-Shenzhen, Shenzhen 518083, China.,Department of Biology, University of Copenhagen, Copenhagen N DK-2200, Denmark
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20
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Baysal BE, Sharma S, Hashemikhabir S, Janga SC. RNA Editing in Pathogenesis of Cancer. Cancer Res 2017; 77:3733-3739. [DOI: 10.1158/0008-5472.can-17-0520] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 04/27/2017] [Accepted: 05/22/2017] [Indexed: 11/16/2022]
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21
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Guerrero EN, Wang H, Mitra J, Hegde PM, Stowell SE, Liachko NF, Kraemer BC, Garruto RM, Rao KS, Hegde ML. TDP-43/FUS in motor neuron disease: Complexity and challenges. Prog Neurobiol 2016; 145-146:78-97. [PMID: 27693252 PMCID: PMC5101148 DOI: 10.1016/j.pneurobio.2016.09.004] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 08/19/2016] [Accepted: 09/20/2016] [Indexed: 01/05/2023]
Abstract
Amyotrophic lateral sclerosis (ALS), a common motor neuron disease affecting two per 100,000 people worldwide, encompasses at least five distinct pathological subtypes, including, ALS-SOD1, ALS-C9orf72, ALS-TDP-43, ALS-FUS and Guam-ALS. The etiology of a major subset of ALS involves toxicity of the TAR DNA-binding protein-43 (TDP-43). A second RNA/DNA binding protein, fused in sarcoma/translocated in liposarcoma (FUS/TLS) has been subsequently associated with about 1% of ALS patients. While mutations in TDP-43 and FUS have been linked to ALS, the key contributing molecular mechanism(s) leading to cell death are still unclear. One unique feature of TDP-43 and FUS pathogenesis in ALS is their nuclear clearance and simultaneous cytoplasmic aggregation in affected motor neurons. Since the discoveries in the last decade implicating TDP-43 and FUS toxicity in ALS, a majority of studies have focused on their cytoplasmic aggregation and disruption of their RNA-binding functions. However, TDP-43 and FUS also bind to DNA, although the significance of their DNA binding in disease-affected neurons has been less investigated. A recent observation of accumulated genomic damage in TDP-43 and FUS-linked ALS and association of FUS with neuronal DNA damage repair pathways indicate a possible role of deregulated DNA binding function of TDP-43 and FUS in ALS. In this review, we discuss the different ALS disease subtypes, crosstalk of etiopathologies in disease progression, available animal models and their limitations, and recent advances in understanding the specific involvement of RNA/DNA binding proteins, TDP-43 and FUS, in motor neuron diseases.
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Affiliation(s)
- Erika N. Guerrero
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas 77030, USA
- Centre for Neuroscience, Institute for Scientific Research and Technology Services (INDICASAT-AIP), City of Knowledge, Panama
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Haibo Wang
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas 77030, USA
| | - Joy Mitra
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas 77030, USA
| | - Pavana M. Hegde
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas 77030, USA
| | - Sara E. Stowell
- Department of Anthropology, Binghamton University, State University of New York, Binghamton, New York
| | - Nicole F Liachko
- Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, 98108, USA
| | - Brian C. Kraemer
- Geriatric Research Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, 98108, USA
| | - Ralph M. Garruto
- Department of Anthropology, Binghamton University, State University of New York, Binghamton, New York
- Department of Biological Sciences, Binghamton University, State University of New York, Binghamton, New York
| | - K. S. Rao
- Centre for Neuroscience, Institute for Scientific Research and Technology Services (INDICASAT-AIP), City of Knowledge, Panama
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, India
| | - Muralidhar L. Hegde
- Department of Radiation Oncology, Houston Methodist Research Institute, Houston, Texas 77030, USA
- Houston Methodist Neurological Institute, Houston, Texas 77030 USA
- Weill Medical College of Cornell University, New York
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Singh S, Colonna G, Di Bernardo G, Bergantino F, Cammarota M, Castello G, Costantini S. The gene expression profiling of hepatocellular carcinoma by a network analysis approach shows a dominance of intrinsically disordered proteins (IDPs) between hub nodes. MOLECULAR BIOSYSTEMS 2016; 11:2933-45. [PMID: 26267014 DOI: 10.1039/c5mb00434a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have analyzed the transcriptomic data from patients with hepatocellular carcinoma (HCC) after viral HCV infection at the various stages of the disease by means of a networking analysis using the publicly available E-MTAB-950 dataset. The data was compared with those obtained in our group from HepG2 cells, a cancer cell line that lacks the viral infection. By sequential pruning of data, and also taking into account the data from cells of healthy patients as blanks, we were able to obtain a distribution of hub genes for the various stages that characterize the disease and finally, we isolated a metabolic sub-net specific to HCC alone. The general picture is that the basic organization to energetically and metabolically sustain the cells in both the normal and diseased conditions is the same, but a complex cluster of sub-networks controlled by hub genes drives the HCC progression with high metabolic flexibility and plasticity. In particular, we have extracted a sub-net of genes strictly correlated to other hub genes of the network from HepG2 cells, but specific for the HCC and mainly devoted to: (i) control at chromatin levels of cell division; (ii) control of ergastoplasmatic stress through protein degradation and misfolding; (iii) control of the immune response also through an increase of mature T-cells in the thymus. This sub-net is characterized by 26 hub genes coding for intrinsically disordered proteins with a high ability to interact with numerous molecular partners. Moreover, we have also noted that periphery molecules, that is, with one or very few interactions (e.g., cytokines or post-translational enzymes), which do not have a central role in the clusters that make up the global metabolic network, essentially have roles as information transporters. The results evidence a strong presence of intrinsically disordered proteins with key roles as hubs in the sub-networks that characterize the various stages of the disease, conferring a structural plasticity to the net nodes but an inherent functional versatility to the whole metabolic net. Thus, our present article provides a novel way of targeting the intrinsic disorder in HCC networks to dampen the cancer effects and provides new insight into the potential mechanisms of HCC. Taken together, the present findings suggest novel targets to design strategies for drug design and may support a rational intervention in the pharmacotherapy of HCC and other associated diseases.
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Affiliation(s)
- Sakshi Singh
- Dottorato in Biologia Computazionale, Dipartimento di Biochimica, Biofisica e Patologia generale, Seconda Università degli Studi di Napoli, Napoli, Italy
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23
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Harjanto D, Papamarkou T, Oates CJ, Rayon-Estrada V, Papavasiliou FN, Papavasiliou A. RNA editing generates cellular subsets with diverse sequence within populations. Nat Commun 2016; 7:12145. [PMID: 27418407 PMCID: PMC4947178 DOI: 10.1038/ncomms12145] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 06/06/2016] [Indexed: 12/20/2022] Open
Abstract
RNA editing is a mutational mechanism that specifically alters the nucleotide content in transcribed RNA. However, editing rates vary widely, and could result from equivalent editing amongst individual cells, or represent an average of variable editing within a population. Here we present a hierarchical Bayesian model that quantifies the variance of editing rates at specific sites using RNA-seq data from both single cells, and a cognate bulk sample to distinguish between these two possibilities. The model predicts high variance for specific edited sites in murine macrophages and dendritic cells, findings that we validated experimentally by using targeted amplification of specific editable transcripts from single cells. The model also predicts changes in variance in editing rates for specific sites in dendritic cells during the course of LPS stimulation. Our data demonstrate substantial variance in editing signatures amongst single cells, supporting the notion that RNA editing generates diversity within cellular populations. RNA editing rate detected from bulk RNA-seq data can vary widely. Here, by constructing a hierarchical Bayesian model, the authors report substantial variance in editing signatures detected by RNA-seq data from both single cells and a cognate bulk sample.
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Affiliation(s)
- Dewi Harjanto
- Laboratory of Lymphocyte Biology, The Rockefeller University, New York, New York 10065, USA
| | - Theodore Papamarkou
- School of Mathematics and Statistics, University of Glasgow, Glasgow G12 8QW, UK
| | - Chris J Oates
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Violeta Rayon-Estrada
- Laboratory of Lymphocyte Biology, The Rockefeller University, New York, New York 10065, USA
| | - F Nina Papavasiliou
- Laboratory of Lymphocyte Biology, The Rockefeller University, New York, New York 10065, USA
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Identification of important long non-coding RNAs and highly recurrent aberrant alternative splicing events in hepatocellular carcinoma through integrative analysis of multiple RNA-Seq datasets. Mol Genet Genomics 2015; 291:1035-51. [PMID: 26711644 DOI: 10.1007/s00438-015-1163-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 12/16/2015] [Indexed: 01/04/2023]
Abstract
Hepatocellular carcinoma (HCC) is an aggressive and deadly cancer. The molecular pathogenesis of the disease remains poorly understood. To better understand HCC biology and explore potential biomarkers and therapeutic targets, we investigated the whole transcriptome of HCC. Considering the genetic heterogeneity of HCC, four datasets from four studies consisting of 15 pairs of HCC and adjacent normal samples were analyzed. We observed that the number of lncRNAs expressed in each HCC sample was consistently greater than the adjacent normal sample. Moreover, 15 lncRNAs were identified expressed in five to seven HCC tissues but were not detected in any adjacent normal tissue. Differential expression analysis detected 35 up- and 80 down-regulated lncRNAs in HCC samples compared with adjacent normal samples. In addition, five differentially expressed lncRNAs were predicted to play a role in oxidation and reduction process. With regard to splicing alterations, we identified nine highly recurrent differential splicing events belonging to eight genes USO1, RPS24, CCDC50, THNSL2, NUMB, FN1 (two events), SLC39A14 and NR1I3. Of them, splicing alterations of SLC39A14 and NR1I3 were reported for the association with HCC for the first time. The splicing dysregulation in HCC may be influenced by three splicing factors ESRP2, CELF2 and SRSF5 which were significantly down-regulated in HCC samples. This study revealed uncharacterized aspects of HCC transcriptome and identified important lncRNAs and splicing isoforms with the potential to serve as biomarkers and therapeutic targets for the disease.
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The Extent of mRNA Editing Is Limited in Chicken Liver and Adipose, but Impacted by Tissular Context, Genotype, Age, and Feeding as Exemplified with a Conserved Edited Site in COG3. G3-GENES GENOMES GENETICS 2015; 6:321-35. [PMID: 26637431 PMCID: PMC4751552 DOI: 10.1534/g3.115.022251] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
RNA editing is a posttranscriptional process leading to differences between genomic DNA and transcript sequences, potentially enhancing transcriptome diversity. With recent advances in high-throughput sequencing, many efforts have been made to describe mRNA editing at the transcriptome scale, especially in mammals, yielding contradictory conclusions regarding the extent of this phenomenon. We show, by detailed description of the 25 studies focusing so far on mRNA editing at the whole-transcriptome scale, that systematic sequencing artifacts are considered in most studies whereas biological replication is often neglected and multi-alignment not properly evaluated, which ultimately impairs the legitimacy of results. We recently developed a rigorous strategy to identify mRNA editing using mRNA and genomic DNA sequencing, taking into account sequencing and mapping artifacts, and biological replicates. We applied this method to screen for mRNA editing in liver and white adipose tissue from eight chickens and confirm the small extent of mRNA recoding in this species. Among the 25 unique edited sites identified, three events were previously described in mammals, attesting that this phenomenon is conserved throughout evolution. Deeper investigations on five sites revealed the impact of tissular context, genotype, age, feeding conditions, and sex on mRNA editing levels. More specifically, this analysis highlighted that the editing level at the site located on COG3 was strongly regulated by four of these factors. By comprehensively characterizing the mRNA editing landscape in chickens, our results highlight how this phenomenon is limited and suggest regulation of editing levels by various genetic and environmental factors.
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26
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Marquardt JU, Andersen JB, Thorgeirsson SS. Functional and genetic deconstruction of the cellular origin in liver cancer. Nat Rev Cancer 2015; 15:653-67. [PMID: 26493646 DOI: 10.1038/nrc4017] [Citation(s) in RCA: 212] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
During the past decade, research on primary liver cancers has particularly highlighted the uncommon plasticity of differentiated parenchymal liver cells (that is, hepatocytes and cholangiocytes (also known as biliary epithelial cells)), the role of liver progenitor cells in malignant transformation, the importance of the tumour microenvironment and the molecular complexity of liver tumours. Whereas other reviews have focused on the landscape of genetic alterations that promote development and progression of primary liver cancers and the role of the tumour microenvironment, the crucial importance of the cellular origin of liver cancer has been much less explored. Therefore, in this Review, we emphasize the importance and complexity of the cellular origin in tumour initiation and progression, and attempt to integrate this aspect with recent discoveries in tumour genomics and the contribution of the disrupted hepatic microenvironment to liver carcinogenesis.
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Affiliation(s)
- Jens U Marquardt
- Department of Medicine I, Johannes Gutenberg University, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Jesper B Andersen
- Biotech Research and Innovation Centre (BRIC), University of Copenhagen, Ole Maaløes Vej 5, 2200 Copenhagen N, Denmark
| | - Snorri S Thorgeirsson
- Laboratory of Experimental Carcinogenesis, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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