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Liu H, Tang Y, Zhang J, Wu G, Peng Q, Chen C, Cao J, Peng R, Su B, Tu D, Jiang G, Wang Q, Liu R, Wang A, Jin S, Zhang C, Bai D. TRIM5 as a promising diagnostic biomarker of hepatocellular carcinoma: integrated analysis and experimental validation. Funct Integr Genomics 2024; 24:63. [PMID: 38517555 DOI: 10.1007/s10142-024-01339-6] [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: 01/05/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/24/2024]
Abstract
The TRIM family is associated with the membrane, and its involvement in the progression, growth, and development of various cancer types has been researched extensively. However, the role played by the TRIM5 gene within this family has yet to be explored to a great extent in terms of hepatocellular carcinoma (HCC). The data of patients relating to mRNA expression and the survival rate of individuals diagnosed with HCC were extracted from The Cancer Genome Atlas (TCGA) database. UALCAN was employed to examine the potential link between TRIM5 expression and clinicopathological characteristics. In addition, enrichment analysis of differentially expressed genes (DEGs) was conducted as a means of deciphering the function and mechanism of TRIM5 in HCC. The data in the TCGA and TIMER2.0 databases was utilized to explore the correlation between TRIM5 and immune infiltration in HCC. WGCNA was performed as a means of assessing TRIM5-related co-expressed genes. The "OncoPredict" R package was also used for investigating the association between TRIM5 and drug sensitivity. Finally, qRT-PCR, Western blotting (WB) and immunohistochemistry (IHC) were employed for exploring the differential expression of TRIM5 and its clinical relevance in HCC. According to the results that were obtained from the vitro experiments, mRNA and protein levels of TRIM5 demonstrated a significant upregulation in HCC tissues. It is notable that TRIM5 expression levels were found to have a strong association with the infiltration of diverse immune cells and displayed a positive correlation with several immune checkpoint inhibitors. The TRIM5 expression also displayed promising clinical prognostic value for HCC patients.
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Affiliation(s)
- Huanxiang Liu
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Yuhong Tang
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Jiahao Zhang
- Dalian Medical University, Dalian, 116044, Liaoning, People's Republic of China
| | - Gefeng Wu
- Dalian Medical University, Dalian, 116044, Liaoning, People's Republic of China
| | - Qing Peng
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Chen Chen
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Jun Cao
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Rui Peng
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Bingbing Su
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Daoyuan Tu
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Guoqing Jiang
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Qian Wang
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Renjie Liu
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Aoqing Wang
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Shengjie Jin
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China
| | - Chi Zhang
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China.
| | - Dousheng Bai
- Yangzhou University Medical College, Yangzhou, 225009, Jiangsu, People's Republic of China.
- Department of Hepatobiliary Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People's Hospital, Yangzhou, 225009, Jiangsu, People's Republic of China.
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Singh K, Chen YC, Hassanzadeh S, Han K, Judy JT, Seifuddin F, Tunc I, Sack MN, Pirooznia M. Network Analysis and Transcriptome Profiling Identify Autophagic and Mitochondrial Dysfunctions in SARS-CoV-2 Infection. Front Genet 2021; 12:599261. [PMID: 33796130 PMCID: PMC8008150 DOI: 10.3389/fgene.2021.599261] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 02/15/2021] [Indexed: 01/08/2023] Open
Abstract
Analyzing host cells' transcriptional response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection will help delineate biological processes underlying viral pathogenesis. First, analysis of expression profiles of lung cell lines A549 and Calu3 revealed upregulation of antiviral interferon signaling genes in response to all three SARS-CoV-2, MERS-CoV, or influenza A virus (IAV) infections. However, perturbations in expression of genes involved in inflammatory, mitochondrial, and autophagy processes were specifically observed in SARS-CoV-2-infected cells. Next, a validation study in infected human nasopharyngeal samples also revealed perturbations in autophagy and mitochondrial processes. Specifically, mTOR expression, mitochondrial ribosomal, mitochondrial complex I, lysosome acidification, and mitochondrial fission promoting genes were concurrently downregulated in both infected cell lines and human samples. SARS-CoV-2 infection impeded autophagic flux either by upregulating GSK3B in lung cell lines or by downregulating autophagy genes, SNAP29, and lysosome acidification genes in human samples, contributing to increased viral replication. Therefore, drugs targeting lysosome acidification or autophagic flux could be tested as intervention strategies. Finally, age-stratified SARS-CoV-2-positive human data revealed impaired upregulation of chemokines, interferon-stimulated genes, and tripartite motif genes that are critical for antiviral signaling. Together, this analysis has revealed specific aspects of autophagic and mitochondrial function that are uniquely perturbed in SARS-CoV-2-infected host cells.
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Affiliation(s)
- Komudi Singh
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Yun-Ching Chen
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Shahin Hassanzadeh
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Kim Han
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Jennifer T. Judy
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Fayaz Seifuddin
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Ilker Tunc
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Michael N. Sack
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
| | - Mehdi Pirooznia
- Bioinformatics and Computational Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States
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Liu D, Yang J, Feng B, Lu W, Zhao C, Li L. Mendelian randomization analysis identified genes pleiotropically associated with the risk and prognosis of COVID-19. J Infect 2021; 82:126-132. [PMID: 33259846 PMCID: PMC7698677 DOI: 10.1016/j.jinf.2020.11.031] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 11/25/2020] [Indexed: 01/02/2023]
Abstract
OBJECTIVES COVID-19 has caused a large global pandemic. Patients with COVID-19 exhibited considerable variation in disease behavior. Pervious genome-wide association studies have identified potential genetic variants involved in the risk and prognosis of COVID-19, but the underlying biological interpretation remains largely unclear. METHODS We applied the summary data-based Mendelian randomization (SMR) method to identify genes that were pleiotropically associated with the risk and various outcomes of COVID-19, including severe respiratory confirmed COVID-19 and hospitalized COVID-19. RESULTS In blood, we identified 2 probes, ILMN_1765146 and ILMN_1791057 tagging IFNAR2, that showed pleiotropic association with hospitalized COVID-19 (β [SE]=0.42 [0.09], P = 4.75 × 10-06 and β [SE]=-0.48 [0.11], P = 6.76 × 10-06, respectively). Although no other probes were significant after correction for multiple testing in both blood and lung, multiple genes as tagged by the top 5 probes were involved in inflammation or antiviral immunity, and several other tagged genes, such as PON2 and HPS5, were involved in blood coagulation. CONCLUSIONS We identified IFNAR2 and other potential genes that could be involved in the susceptibility or prognosis of COVID-19. These findings provide important leads to a better understanding of the mechanisms of cytokine storm and venous thromboembolism in COVID-19 and potential therapeutic targets for the effective treatment of COVID-19.
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Affiliation(s)
- Di Liu
- Beijing Key Laboratory of Clinical Epidemiology, School of Public Health, Capital Medical University, Beijing, China
| | - Jingyun Yang
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA; Department of Neurological Sciences, Rush University Medical Center, Chicago, IL, USA
| | - Bowen Feng
- Odette School of Business, University of Windsor, Windsor, ON, Canada
| | - Wenjin Lu
- Department of Mathematics, University College London, London, United Kingdom
| | - Chuntao Zhao
- Brain Tumor Center, Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Lizhuo Li
- Emergency Department, Xuanwu Hospital, Capital Medical University, Beijing, China.
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Liu D, Yang J, Feng B, Lu W, Zhao C, Li L. Mendelian randomization analysis identified genes pleiotropically associated with the risk and prognosis of COVID-19. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2020. [PMID: 32909000 DOI: 10.1101/2020.09.02.20187179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES COVID-19 has caused a large global pandemic. Patients with COVID-19 exhibited considerable variation in disease behavior. Pervious genome-wide association studies have identified potential genetic variants involved in the risk and prognosis of COVID-19, but the underlying biological interpretation remains largely unclear. METHODS We applied the summary data-based Mendelian randomization (SMR) method to identify genes that were pleiotropically associated with the risk and various outcomes of COVID-19, including severe respiratory confirmed COVID-19 and hospitalized COVID-19. RESULTS In blood, we identified 2 probes, ILMN_1765146 and ILMN_1791057 tagging IFNAR2, that showed pleiotropic association with hospitalized COVID-19 (Beta; [SE]=0.42 [0.09], P=4.75E-06 and Beta; [SE]=-0.48 [0.11], P=6.76E-06, respectively). Although no other probes were significant after correction for multiple testing in both blood and lung, multiple genes as tagged by the top 5 probes were involved in inflammation or antiviral immunity, and several other tagged genes, such as PON2 and HPS5, were involved in blood coagulation. CONCLUSIONS We identified IFNAR2 and other potential genes that could be involved in the susceptibility or prognosis of COVID-19. These findings provide important leads to a better understanding of the mechanisms of cytokine storm and venous thromboembolism in COVID-19 and potential therapeutic targets for the effective treatment of COVID-19.
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Singh K, Chen YC, Judy JT, Seifuddin F, Tunc I, Pirooznia M. Network Analysis and Transcriptome Profiling Identify Autophagic and Mitochondrial Dysfunctions in SARS-CoV-2 Infection. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2020:2020.05.13.092536. [PMID: 32511341 PMCID: PMC7241104 DOI: 10.1101/2020.05.13.092536] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
Analyzing host transcriptional changes in response to SARS-CoV-2 infection will help delineate biological processes underlying viral pathogenesis. Comparison of expression profiles of lung cell lines A549 (infected with either SARS-CoV-2 (with ACE2 expression)) or Influenza A virus (IAV)) and Calu3 (infected with SARS-CoV-2 or MERS-CoV) revealed upregulation of the antiviral interferon signaling in all three viral infections. However, perturbations in inflammatory, mitochondrial, and autophagy processes were specifically observed in SARS-CoV-2 infected cells. Validation of findings from cell line data revealed perturbations in autophagy and mitochondrial processes in the infected human nasopharyngeal samples. Specifically, downregulation of mTOR expression, mitochondrial ribosomal, mitochondrial complex I, and lysosome acidification genes were concurrently observed in both infected cell lines and human datasets. Furthermore, SARS-CoV-2 infection impedes autophagic flux by upregulating GSK3B in lung cell lines, or by downregulating autophagy genes, SNAP29 and lysosome acidification genes in human samples, contributing to increased viral replication. Therefore, drugs targeting lysosome acidification or autophagic flux could be tested as intervention strategies. Additionally, downregulation of MTFP1 (in cell lines) or SOCS6 (in human samples) results in hyperfused mitochondria and impede proper interferon response. Coexpression networks analysis identifies correlated clusters of genes annotated to inflammation and mitochondrial processes that are misregulated in SARS-CoV-2 infected cells. Finally, comparison of age stratified human gene expression data revealed impaired upregulation of chemokines, interferon stimulated and tripartite motif genes that are critical for antiviral signaling. Together, this analysis has revealed specific aspects of autophagic and mitochondrial function that are uniquely perturbed in SARS-CoV-2 infection.
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Affiliation(s)
- Komudi Singh
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Yun-Ching Chen
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jennifer T Judy
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Fayaz Seifuddin
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ilker Tunc
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Mehdi Pirooznia
- Bioinformatics and Computational Biology Laboratory, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Hodge CD, Spyracopoulos L, Glover JNM. Ubc13: the Lys63 ubiquitin chain building machine. Oncotarget 2018; 7:64471-64504. [PMID: 27486774 PMCID: PMC5325457 DOI: 10.18632/oncotarget.10948] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Accepted: 07/19/2016] [Indexed: 12/25/2022] Open
Abstract
Ubc13 is an ubiquitin E2 conjugating enzyme that participates with many different E3 ligases to form lysine 63-linked (Lys63) ubiquitin chains that are critical to signaling in inflammatory and DNA damage response pathways. Recent studies have suggested Ubc13 as a potential therapeutic target for intervention in various human diseases including several different cancers, alleviation of anti-cancer drug resistance, chronic inflammation, and viral infections. Understanding a potential therapeutic target from different angles is important to assess its usefulness and potential pitfalls. Here we present a global review of Ubc13 from its structure, function, and cellular activities, to its natural and chemical inhibition. The aim of this article is to review the literature that directly implicates Ubc13 in a biological function, and to integrate structural and mechanistic insights into the larger role of this critical E2 enzyme. We discuss observations of multiple Ubc13 structures that suggest a novel mechanism for activation of Ubc13 that involves conformational change of the active site loop.
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Affiliation(s)
- Curtis D Hodge
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - Leo Spyracopoulos
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
| | - J N Mark Glover
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada
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The innate immune roles of host factors TRIM5α and Cyclophilin A on HIV-1 replication. Med Microbiol Immunol 2015; 204:557-65. [PMID: 25894765 DOI: 10.1007/s00430-015-0417-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 04/04/2015] [Indexed: 10/23/2022]
Abstract
During the long-term evolutionary history, the interaction between virus and host has driven the first-line barrier, innate immunity, to invading pathogens. Innate immune factor TRIM5α and host peptidyl-prolyl cis-trans isomerase Cyclophilin A are two key players in the interaction between HIV-1 and host. Interestingly, Cyclophilin A is retrotransposed into the critical host gene, TRIM5, locus via LINE-1 element in some primate species including New World monkeys and Old World monkeys. This review aims to comprehensively discuss the sensing and immune activation procedures of TRIM5α innate signaling pathway through Cyclophilin A. It will then present the production of TRIMCyp chimeric gene and the different fusion patterns in primates. Finally, it will summarize the distinct restriction activity of TRIMCyp from different primates and explain the current understanding on the innate immune mechanisms involved in the early phase of the viral life cycle during HIV-1 replication.
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Innate immune evasion strategies by human immunodeficiency virus type 1. ISRN AIDS 2013; 2013:954806. [PMID: 24052891 PMCID: PMC3767209 DOI: 10.1155/2013/954806] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 07/09/2013] [Indexed: 12/21/2022]
Abstract
Host immune components play both beneficial and pathogenic roles in human immunodeficiency virus type 1 (HIV-1) infection. During the initial stage of viral infection, a complex network of innate immune factors are activated. For instance, the immune cells express a number of inflammatory proteins including cytokines, chemokines, and antiviral restriction factors. These factors, specifically, interferons (IFNs) play a crucial role in antiviral defense system by modulating the downstream signaling events, by inducing maturation of dendritic cells (DCs), and by activation of macrophages, natural killer (NK) cells, and B and T cells. However, HIV-1 has evolved to utilize a number of strategies to overcome the antiviral effects of the host innate immune system. This review discusses the pathways and strategies utilized by HIV-1 to establish latent and persistent infection by defeating host's innate defense system.
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Saito A, Akari H. Macaque-tropic human immunodeficiency virus type 1: breaking out of the host restriction factors. Front Microbiol 2013; 4:187. [PMID: 23847610 PMCID: PMC3705164 DOI: 10.3389/fmicb.2013.00187] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 06/20/2013] [Indexed: 12/02/2022] Open
Abstract
Macaque monkeys serve as important animal models for understanding the pathogenesis of lentiviral infections. Since human immunodeficiency virus type 1 (HIV-1) hardly replicates in macaque cells, simian immunodeficiency virus (SIV) or chimeric viruses between HIV-1 and SIV (SHIV) have been used as challenge viruses in this research field. These viruses, however, are genetically distant from HIV-1. Therefore, in order to evaluate the efficacy of anti-HIV-1 drugs and vaccines in macaques, the development of a macaque-tropic HIV-1 (HIV-1mt) having the ability to replicate efficiently in macaques has long been desired. Recent studies have demonstrated that host restriction factors, such as APOBEC3 family and TRIM5, impose a strong barrier against HIV-1 replication in macaque cells. By evading these restriction factors, others and we have succeeded in developing an HIV-1mt that is able to replicate in macaques. In this review, we have attempted to shed light on the role of host factors that affect the susceptibility of macaques to HIV-1mt infection, especially by focusing on TRIM5-related factors.
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Affiliation(s)
- Akatsuki Saito
- Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University Inuyama, Japan ; Japan Foundation for AIDS Prevention Chiyoda-ku, Japan
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Berka U, Hamann MV, Lindemann D. Early events in foamy virus-host interaction and intracellular trafficking. Viruses 2013; 5:1055-74. [PMID: 23567621 PMCID: PMC3705265 DOI: 10.3390/v5041055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 03/28/2013] [Accepted: 03/29/2013] [Indexed: 02/08/2023] Open
Abstract
Here we review viral and cellular requirements for entry and intracellular trafficking of foamy viruses (FVs) resulting in integration of viral sequences into the host cell genome. The virus encoded glycoprotein harbors all essential viral determinants, which are involved in absorption to the host membrane and triggering the uptake of virus particles. However, only recently light was shed on some details of FV's interaction with its host cell receptor(s). Latest studies indicate glycosaminoglycans of cellular proteoglycans, particularly heparan sulfate, to be of utmost importance. In a species-specific manner FVs encounter endogenous machineries of the target cell, which are in some cases exploited for fusion and further egress into the cytosol. Mostly triggered by pH-dependent endocytosis, viral and cellular membranes fuse and release naked FV capsids into the cytoplasm. Intact FV capsids are then shuttled along microtubules and are found to accumulate nearby the centrosome where they can remain in a latent state for extended time periods. Depending on the host cell cycle status, FV capsids finally disassemble and, by still poorly characterized mechanisms, the preintegration complex gets access to the host cell chromatin. Host cell mitosis finally allows for viral genome integration, ultimately starting a new round of viral replication.
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Affiliation(s)
- Ursula Berka
- Institute of Virology, Medical Faculty―Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, Dresden 01307, Germany; E-Mails: (U.B.); (M.V.H.)
- DFG-Center for Regenerative Therapies Dresden (CRTD)—Cluster of Excellence, Biotechnology Center, Technische Universität Dresden, Fetscherstr. 105, Dresden 01307, Germany
| | - Martin Volker Hamann
- Institute of Virology, Medical Faculty―Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, Dresden 01307, Germany; E-Mails: (U.B.); (M.V.H.)
- DFG-Center for Regenerative Therapies Dresden (CRTD)—Cluster of Excellence, Biotechnology Center, Technische Universität Dresden, Fetscherstr. 105, Dresden 01307, Germany
| | - Dirk Lindemann
- Institute of Virology, Medical Faculty―Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, Dresden 01307, Germany; E-Mails: (U.B.); (M.V.H.)
- DFG-Center for Regenerative Therapies Dresden (CRTD)—Cluster of Excellence, Biotechnology Center, Technische Universität Dresden, Fetscherstr. 105, Dresden 01307, Germany
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