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Carden H, Harper KL, Mottram TJ, Manners O, Allott KL, Dallas ML, Hughes DJ, Lippiat JD, Mankouri J, Whitehouse A. K v1.3-induced hyperpolarization is required for efficient Kaposi's sarcoma-associated herpesvirus lytic replication. Sci Signal 2024; 17:eadg4124. [PMID: 39012937 DOI: 10.1126/scisignal.adg4124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 06/25/2024] [Indexed: 07/18/2024]
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is an oncogenic herpesvirus that is linked directly to the development of Kaposi's sarcoma. KSHV establishes a latent infection in B cells, which can be reactivated to initiate lytic replication, producing infectious virions. Using pharmacological and genetic silencing approaches, we showed that the voltage-gated K+ channel Kv1.3 in B cells enhanced KSHV lytic replication. The KSHV replication and transcription activator (RTA) protein increased the abundance of Kv1.3 and led to enhanced K+ channel activity and hyperpolarization of the B cell membrane. Enhanced Kv1.3 activity promoted intracellular Ca2+ influx, leading to the Ca2+-driven nuclear localization of KSHV RTA and host nuclear factor of activated T cells (NFAT) proteins and subsequently increased the expression of NFAT1 target genes. KSHV lytic replication and infectious virion production were inhibited by Kv1.3 blockers or silencing. These findings highlight Kv1.3 as a druggable host factor that is key to the successful completion of KSHV lytic replication.
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Affiliation(s)
- Holli Carden
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Katherine L Harper
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Timothy J Mottram
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Oliver Manners
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Katie L Allott
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Mark L Dallas
- School of Pharmacy, University of Reading, RG6 6AP Reading, UK
| | - David J Hughes
- Biomedical Sciences Research Complex, School of Biology, University of St Andrews, North Haugh, KY16 9ST St Andrews, UK
| | - Jonathan D Lippiat
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, UK
| | - Jamel Mankouri
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
| | - Adrian Whitehouse
- School of Molecular and Cellular Biology and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT Leeds, UK
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown 6140, South Africa
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Rauch DA, Ramos PV, Khanfar M, Harding J, Joseph A, Griffith O, Griffith M, Ratner L. Single-Cell Transcriptomic Analysis of Kaposi Sarcoma. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.01.592010. [PMID: 38746135 PMCID: PMC11092626 DOI: 10.1101/2024.05.01.592010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Kaposi Sarcoma (KS) is a complex tumor caused by KS-associated herpesvirus 8 (KSHV). Histological analysis reveals a mixture of "spindle cells", vascular-like spaces, extravasated erythrocytes, and immune cells. In order to elucidate the infected and uninfected cell types in KS tumors, we examined skin and blood samples from twelve subjects by single cell RNA sequence analyses. Two populations of KSHV-infected cells were identified, one of which represented a proliferative fraction of lymphatic endothelial cells, and the second represented an angiogenic population of vascular endothelial tip cells. Both infected clusters contained cells expressing lytic and latent KSHV genes. Novel cellular biomarkers were identified in the KSHV infected cells, including the sodium channel SCN9A. The number of KSHV positive tumor cells was found to be in the 6% range in HIV-associated KS, correlated inversely with tumor-infiltrating immune cells, and was reduced in biopsies from HIV-negative individuals. T-cell receptor clones were expanded in KS tumors and blood, although in differing magnitudes. Changes in cellular composition in KS tumors were identified in subjects treated with antiretroviral therapy alone, or immunotherapy. These studies demonstrate the feasibility of single cell analyses to identify prognostic and predictive biomarkers. Author Summary Kaposi sarcoma (KS) is a malignancy caused by the KS-associated herpesvirus (KSHV) that causes skin lesions, and may also be found in lymph nodes, lungs, gastrointestinal tract, and other organs in immunosuppressed individuals more commonly than immunocompetent subjects. The current study examined gene expression in single cells from the tumor and blood of these subjects, and identified the characteristics of the complex mixtures of cells in the tumor. This method also identified differences in KSHV gene expression in different cell types and associated cellular genes expressed in KSHV infected cells. In addition, changes in the cellular composition could be elucidated with therapeutic interventions.
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3
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Prazsák I, Tombácz D, Fülöp Á, Torma G, Gulyás G, Dörmő Á, Kakuk B, McKenzie Spires L, Toth Z, Boldogkői Z. KSHV 3.0: a state-of-the-art annotation of the Kaposi's sarcoma-associated herpesvirus transcriptome using cross-platform sequencing. mSystems 2024; 9:e0100723. [PMID: 38206015 PMCID: PMC10878076 DOI: 10.1128/msystems.01007-23] [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: 09/19/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is a large, oncogenic DNA virus belonging to the gammaherpesvirus subfamily. KSHV has been extensively studied with various high-throughput RNA-sequencing approaches to map the transcription start and end sites, the splice junctions, and the translation initiation sites. Despite these efforts, the comprehensive annotation of the viral transcriptome remains incomplete. In the present study, we generated a long-read sequencing data set of the lytic and latent KSHV transcriptome using native RNA and direct cDNA-sequencing methods. This was supplemented with Cap Analysis of Gene Expression sequencing based on a short-read platform. We also utilized data sets from previous publications for our analysis. As a result of this combined approach, we have identified a number of novel viral transcripts and RNA isoforms and have either corroborated or improved the annotation of previously identified viral RNA molecules, thereby notably enhancing our comprehension of the transcriptomic architecture of the KSHV genome. We also evaluated the coding capability of transcripts previously thought to be non-coding by integrating our data on the viral transcripts with translatomic information from other publications.IMPORTANCEDeciphering the viral transcriptome of Kaposi's sarcoma-associated herpesvirus is of great importance because we can gain insight into the molecular mechanism of viral replication and pathogenesis, which can help develop potential targets for antiviral interventions. Specifically, the identification of substantial transcriptional overlaps by this work suggests the existence of a genome-wide interference between transcriptional machineries. This finding indicates the presence of a novel regulatory layer, potentially controlling the expression of viral genes.
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Affiliation(s)
- István Prazsák
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Dóra Tombácz
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ádám Fülöp
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gábor Torma
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gábor Gulyás
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ákos Dörmő
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Balázs Kakuk
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Lauren McKenzie Spires
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Zsolt Toth
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Zsolt Boldogkői
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
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Majerciak V, Alvarado-Hernandez B, Ma Y, Duduskar S, Lobanov A, Cam M, Zheng ZM. KSHV promotes oncogenic FOS to inhibit nuclease AEN and transactivate RGS2 for AKT phosphorylation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.27.577582. [PMID: 38410462 PMCID: PMC10896338 DOI: 10.1101/2024.01.27.577582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) ORF57 is a lytic RNA-binding protein. We applied BCBL-1 cells in lytic KSHV infection and performed UV cross-linking immunoprecipitation (CLIP) followed by RNA-seq of the CLIPed RNA fragments (CLIP-seq). We identified ORF57-bound transcripts from 544 host protein-coding genes. By comparing with the RNA-seq profiles from BCBL-1 cells with latent and lytic KSHV infection and from HEK293T cells with and without ORF57 expression, we identified FOS and CITED2 RNAs being two common ORF57-specific RNA targets. FOS dimerizes with JUN as a transcription factor AP-1 involved in cell proliferation, differentiation, and transformation. Knockout of the ORF57 gene from the KSHV genome led BAC16-iSLK cells incapable of FOS expression in KSHV lytic infection. The dysfunctional KSHV genome in FOS expression could be rescued by Lenti-ORF57 virus infection. ORF57 protein does not regulate FOS translation but binds to the 13-nt RNA motif near the FOS RNA 5' end and prolongs FOS mRNA half-life 7.7 times longer than it is in the absence of ORF57. This binding of ORF57 to FOS RNA is competitive to the binding of a host nuclease AEN (also referred to as ISG20L1). KSHV infection inhibits the expression of AEN, but not exosomal RNA helicase MTR4. FOS expression mediated by ORF57 inhibits AEN transcription, but transactivates RGS2, a regulator of G-protein coupled receptors. FOS binds a conserved AP-1 site in the RGS2 promoter and enhances RGS2 expression to phosphorylate AKT. Altogether, we have discovered that KSHV ORF57 specifically binds and stabilizes FOS RNA to increase FOS expression, thereby disturbing host gene expression and inducing pathogenesis during KSHV lytic infection.
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Affiliation(s)
- Vladimir Majerciak
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, NCI/NIH, Frederick, MD, 21702, USA
| | - Beatriz Alvarado-Hernandez
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, NCI/NIH, Frederick, MD, 21702, USA
| | - Yanping Ma
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, NCI/NIH, Frederick, MD, 21702, USA
| | - Shivalee Duduskar
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, NCI/NIH, Frederick, MD, 21702, USA
| | - Alexei Lobanov
- CCR Collaborative Bioinformatics Resource, Center for Cancer Research, NCI/NIH, Bethesda, MD, 20892, USA
| | - Maggie Cam
- CCR Collaborative Bioinformatics Resource, Center for Cancer Research, NCI/NIH, Bethesda, MD, 20892, USA
| | - Zhi-Ming Zheng
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, NCI/NIH, Frederick, MD, 21702, USA
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5
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Calhoun JC, Damania B, Griffith JD, Costantini LM. Electron microscopy mapping of the DNA-binding sites of monomeric, dimeric, and multimeric KSHV RTA protein. J Virol 2023; 97:e0063723. [PMID: 37750723 PMCID: PMC10617422 DOI: 10.1128/jvi.00637-23] [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: 04/28/2023] [Accepted: 08/19/2023] [Indexed: 09/27/2023] Open
Abstract
IMPORTANCE Kaposi's sarcoma-associated herpesvirus (KSHV) is a human herpesvirus associated with several human cancers, typically in patients with compromised immune systems. Herpesviruses establish lifelong infections in hosts in part due to the two phases of infection: the dormant and active phases. Effective antiviral treatments to prevent the production of new viruses are needed to treat KSHV. A detailed microscopy-based investigation of the molecular interactions between viral protein and viral DNA revealed how protein-protein interactions play a role in DNA-binding specificity. This analysis will lead to a more in-depth understanding of KSHV DNA replication and serve as the basis for anti-viral therapies that disrupt and prevent the protein-DNA interactions, thereby decreasing spread to new hosts.
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Affiliation(s)
- Jayla C. Calhoun
- Biological and Biomedical Sciences Department, North Carolina Central University, Durham, North Carolina, USA
| | - Blossom Damania
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Jack D. Griffith
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Lindsey M. Costantini
- Biological and Biomedical Sciences Department, North Carolina Central University, Durham, North Carolina, USA
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Sucharita S, Krishnagopal A, van Drunen Littel-van den Hurk S. Comprehensive Analysis of the Tegument Proteins Involved in Capsid Transport and Virion Morphogenesis of Alpha, Beta and Gamma Herpesviruses. Viruses 2023; 15:2058. [PMID: 37896835 PMCID: PMC10611259 DOI: 10.3390/v15102058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/21/2023] [Accepted: 09/21/2023] [Indexed: 10/29/2023] Open
Abstract
Herpesviruses are enveloped and have an amorphous protein layer surrounding the capsid, which is termed the tegument. Tegument proteins perform critical functions throughout the viral life cycle. This review provides a comprehensive and comparative analysis of the roles of specific tegument proteins in capsid transport and virion morphogenesis of selected, well-studied prototypes of each of the three subfamilies of Herpesviridae i.e., human herpesvirus-1/herpes simplex virus-1 (Alphaherpesvirinae), human herpesvirus-5/cytomegalovirus (Betaherpesvirinae) and human herpesvirus -8/Kaposi's sarcomavirus (Gammaherpesvirinae). Most of the current knowledge is based on alpha herpesviruses, in particular HSV-1. While some tegument proteins are released into the cytoplasm after virus entry, several tegument proteins remain associated with the capsid and are responsible for transport to and docking at the nucleus. After replication and capsid formation, the capsid is enveloped at the nuclear membrane, which is referred to as primary envelopment, followed by de-envelopment and release into the cytoplasm. This requires involvement of at least three tegument proteins. Subsequently, multiple interactions between tegument proteins and capsid proteins, other tegument proteins and glycoproteins are required for assembly of the virus particles and envelopment at the Golgi, with certain tegument proteins acting as the central hub for these interactions. Some redundancy in these interactions ensures appropriate morphogenesis.
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Affiliation(s)
- Soumya Sucharita
- Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.S.); (A.K.)
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Akshaya Krishnagopal
- Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.S.); (A.K.)
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Sylvia van Drunen Littel-van den Hurk
- Biochemistry, Microbiology and Immunology, College of Medicine, University of Saskatchewan, Saskatoon, SK S7N 5E5, Canada; (S.S.); (A.K.)
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
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7
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Srivastava A, Srivastava A, Singh RK. Insight into the Epigenetics of Kaposi's Sarcoma-Associated Herpesvirus. Int J Mol Sci 2023; 24:14955. [PMID: 37834404 PMCID: PMC10573522 DOI: 10.3390/ijms241914955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/25/2023] [Accepted: 07/28/2023] [Indexed: 10/15/2023] Open
Abstract
Epigenetic reprogramming represents a series of essential events during many cellular processes including oncogenesis. The genome of Kaposi's sarcoma-associated herpesvirus (KSHV), an oncogenic herpesvirus, is predetermined for a well-orchestrated epigenetic reprogramming once it enters into the host cell. The initial epigenetic reprogramming of the KSHV genome allows restricted expression of encoded genes and helps to hide from host immune recognition. Infection with KSHV is associated with Kaposi's sarcoma, multicentric Castleman's disease, KSHV inflammatory cytokine syndrome, and primary effusion lymphoma. The major epigenetic modifications associated with KSHV can be labeled under three broad categories: DNA methylation, histone modifications, and the role of noncoding RNAs. These epigenetic modifications significantly contribute toward the latent-lytic switch of the KSHV lifecycle. This review gives a brief account of the major epigenetic modifications affiliated with the KSHV genome in infected cells and their impact on pathogenesis.
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Affiliation(s)
- Anusha Srivastava
- Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
| | - Ankit Srivastava
- Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
| | - Rajnish Kumar Singh
- Institute of Medical Sciences, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India
- Faculty of Medical Sciences, Charotar University of Science and Technology, Changa 388421, Gujarat, India
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8
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Ramaswami R, Tagawa T, Mahesh G, Serquina A, Koparde V, Lurain K, Dremel S, Li X, Mungale A, Beran A, Ohler ZW, Bassel L, Warner A, Mangusan R, Widell A, Ekwede I, Krug LT, Uldrick TS, Yarchoan R, Ziegelbauer JM. Transcriptional landscape of Kaposi sarcoma tumors identifies unique immunologic signatures and key determinants of angiogenesis. J Transl Med 2023; 21:653. [PMID: 37740179 PMCID: PMC10517594 DOI: 10.1186/s12967-023-04517-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/09/2023] [Indexed: 09/24/2023] Open
Abstract
BACKGROUND Kaposi sarcoma (KS) is a multicentric tumor caused by Kaposi sarcoma herpesvirus (KSHV) that leads to morbidity and mortality among people with HIV worldwide. KS commonly involves the skin but can occur in the gastrointestinal tract (GI) in severe cases. METHODS RNA sequencing was used to compare the cellular and KSHV gene expression signatures of skin and GI KS lesions in 44 paired samples from 19 participants with KS alone or with concurrent KSHV-associated diseases. Analyses of KSHV expression from KS lesions identified transcriptionally active areas of the viral genome. RESULTS The transcript of an essential viral lytic gene, ORF75, was detected in 91% of KS lesions. Analyses of host genes identified 370 differentially expressed genes (DEGs) unique to skin KS and 58 DEGs unique to GI KS lesions as compared to normal tissue. Interleukin (IL)-6 and IL-10 gene expression were higher in skin lesions as compared to normal skin but not in GI KS lesions. Twenty-six cellular genes were differentially expressed in both skin and GI KS tissues: these included Fms-related tyrosine kinase 4 (FLT4), encoding an angiogenic receptor, and Stanniocalcin 1 (STC1), a secreted glycoprotein. FLT4 and STC1 were further investigated in functional studies using primary lymphatic endothelial cells (LECs). In these models, KSHV infection of LECs led to increased tubule formation that was impaired upon knock-down of STC1 or FLT4. CONCLUSIONS This study of transcriptional profiling of KS tissue provides novel insights into the characteristics and pathogenesis of this unique virus-driven neoplasm.
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Affiliation(s)
- Ramya Ramaswami
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Takanobu Tagawa
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Guruswamy Mahesh
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Anna Serquina
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Vishal Koparde
- Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Kathryn Lurain
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Sarah Dremel
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Xiaofan Li
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Ameera Mungale
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Alex Beran
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Zoe Weaver Ohler
- Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Laura Bassel
- Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Andrew Warner
- Frederick National Laboratory for Cancer Research, Frederick, MD, USA
| | - Ralph Mangusan
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Anaida Widell
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Irene Ekwede
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Laurie T Krug
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Thomas S Uldrick
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Robert Yarchoan
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Joseph M Ziegelbauer
- HIV and AIDS Malignancy Branch, National Cancer Institute, Bethesda, MD, 20892, USA.
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9
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Prazsák I, Tombácz D, Fülöp Á, Torma G, Gulyás G, Dörmő Á, Kakuk B, Spires LM, Toth Z, Boldogkői Z. KSHV 3.0: A State-of-the-Art Annotation of the Kaposi's Sarcoma-Associated Herpesvirus Transcriptome Using Cross-Platform Sequencing. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.21.558842. [PMID: 37790386 PMCID: PMC10542539 DOI: 10.1101/2023.09.21.558842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is a large, oncogenic DNA virus belonging to the gammaherpesvirus subfamily. KSHV has been extensively studied with various high-throughput RNA-sequencing approaches to map the transcription start and end sites, the splice junctions, and the translation initiation sites. Despite these efforts, the comprehensive annotation of the viral transcriptome remains incomplete. In the present study, we generated a long-read sequencing dataset of the lytic and latent KSHV transcriptome using native RNA and direct cDNA sequencing methods. This was supplemented with CAGE sequencing based on a short-read platform. We also utilized datasets from previous publications for our analysis. As a result of this combined approach, we have identified a number of novel viral transcripts and RNA isoforms and have either corroborated or improved the annotation of previously identified viral RNA molecules, thereby notably enhancing our comprehension of the transcriptomic architecture of the KSHV genome. We also evaluated the coding capability of transcripts previously thought to be non-coding, by integrating our data on the viral transcripts with translatomic information from other publications.
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Affiliation(s)
- István Prazsák
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Dóra Tombácz
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ádám Fülöp
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gábor Torma
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Gábor Gulyás
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Ákos Dörmő
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Balázs Kakuk
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
| | - Lauren McKenzie Spires
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Zsolt Toth
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Zsolt Boldogkői
- Department of Medical Biology, Albert Szent-Györgyi Medical School, University of Szeged, Szeged, Hungary
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10
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Zhang X, Meng W, Feng J, Gao X, Qin C, Feng P, Huang Y, Gao SJ. METTL16 controls Kaposi's sarcoma-associated herpesvirus replication by regulating S-adenosylmethionine cycle. Cell Death Dis 2023; 14:591. [PMID: 37673880 PMCID: PMC10482891 DOI: 10.1038/s41419-023-06121-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/22/2023] [Accepted: 08/29/2023] [Indexed: 09/08/2023]
Abstract
Oncogenic Kaposi's sarcoma-associated herpesvirus (KSHV) consists of latent and lytic replication phases, both of which are important for the development of KSHV-related cancers. As one of the most abundant RNA modifications, N6-methyladenosine (m6A) and its related complexes regulate KSHV life cycle. However, the role of METTL16, a newly discovered RNA methyltransferase, in KSHV life cycle remains unknown. In this study, we have identified a suppressive role of METTL16 in KSHV lytic replication. METTL16 knockdown increased while METTL16 overexpression reduced KSHV lytic replication. METTL16 binding to and writing of m6A on MAT2A transcript are essential for its splicing, maturation and expression. As a rate-limiting enzyme in the methionine-S-adenosylmethionine (SAM) cycle, MAT2A catalyzes the conversion of L-methionine to SAM required for the transmethylation of protein, DNA and RNA, transamination of polyamines, and transsulfuration of cystathionine. Consequently, knockdown or chemical inhibition of MAT2A reduced intracellular SAM level and enhanced KSHV lytic replication. In contrast, SAM treatment was sufficient to inhibit KSHV lytic replication and reverse the effect of the enhanced KSHV lytic program caused by METTL16 or MAT2A knockdown. Mechanistically, METTL16 or MAT2A knockdown increased while SAM treatment decreased the intracellular reactive oxygen species level by altering glutathione level, which is essential for efficient KSHV lytic replication. These findings demonstrate that METTL16 suppresses KSHV lytic replication by modulating the SAM cycle to maintain intracellular SAM level and redox homeostasis, thus illustrating the linkage of KSHV life cycle with specific m6A modifications, and cellular metabolic and oxidative conditions.
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Affiliation(s)
- Xinquan Zhang
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Wen Meng
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jian Feng
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Xinghong Gao
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Chao Qin
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Pinghui Feng
- Section of Infection and Immunity, Herman Ostrow School of Dentistry, Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Yufei Huang
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA
- Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Electrical and Computer Engineering, Swanson School of Engineering, Pittsburgh, PA, USA
| | - Shou-Jiang Gao
- Cancer Virology Program, University of Pittsburgh Medical Center Hillman Cancer Center, Pittsburgh, PA, USA.
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
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11
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Lee MJ, Park J, Choi S, Yoo SM, Park C, Kim HS, Lee MS. HMGB1, a potential regulator of tumor microenvironment in KSHV-infected endothelial cells. Front Microbiol 2023; 14:1202993. [PMID: 37520371 PMCID: PMC10374257 DOI: 10.3389/fmicb.2023.1202993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/30/2023] [Indexed: 08/01/2023] Open
Abstract
High-mobility group box 1 (HMGB1) is a protein that binds to DNA and participates in various cellular processes, including DNA repair, transcription, and inflammation. It is also associated with cancer progression and therapeutic resistance. Despite its known role in promoting tumor growth and immune evasion in the tumor microenvironment, the contribution of HMGB1 to the development of Kaposi's sarcoma (KS) is not well understood. We investigated the effect of HMGB1 on KS pathogenesis using immortalized human endothelial cells infected with Kaposi's sarcoma-associated human herpes virus (KSHV). Our results showed that a higher amount of HMGB1 was detected in the supernatant of KSHV-infected cells compared to that of mock-infected cells, indicating that KSHV infection induced the secretion of HMGB1 in human endothelial cells. By generating HMGB1 knockout clones from immortalized human endothelial cells using CRISPR/Cas9, we elucidated the role of HMGB1 in KSHV-infected endothelial cells. Our findings indicate that the absence of HMGB1 did not induce lytic replication in KSHV-infected cells, but the cell viability of KSHV-infected cells was decreased in both 2D and 3D cultures. Through the antibody array for cytokines and growth factors, CXCL5, PDGF-AA, G-CSF, Emmprin, IL-17A, and VEGF were found to be suppressed in HMGB1 KO KSHV-infected cells compared to the KSHV-infected wild-type control. Mechanistically, phosphorylation of p38 would be associated with transcriptional regulation of CXCL5, PDGF-A and VEGF. These observations suggest that HMGB1 may play a critical role in KS pathogenesis by regulating cytokine and growth factor secretion and emphasize its potential as a therapeutic target for KS by modulating the tumor microenvironment.
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Affiliation(s)
- Myung-Ju Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Joohee Park
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Seokjoo Choi
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Seung-Min Yoo
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
- Eulji Biomedical Science Research Institute, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Changhoon Park
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Hong Seok Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon, Republic of Korea
| | - Myung-Shin Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
- Eulji Biomedical Science Research Institute, Eulji University School of Medicine, Daejeon, Republic of Korea
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12
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Zhang X, Lan Q, Zhang M, Wang F, Shi K, Li X, Kuang E. Inhibition of AIM2 inflammasome activation by SOX/ORF37 promotes lytic replication of Kaposi's sarcoma-associated herpesvirus. Proc Natl Acad Sci U S A 2023; 120:e2300204120. [PMID: 37364111 PMCID: PMC10318979 DOI: 10.1073/pnas.2300204120] [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: 01/05/2023] [Accepted: 05/16/2023] [Indexed: 06/28/2023] Open
Abstract
Inflammasomes are one kind of important innate immune defense against viral and bacterial infections. Several inflammasome-forming sensors detect molecular patterns of invading pathogens and then trigger inflammasome activation and/or pyroptosis in infected cells, and viruses employ unique strategies to hijack or subvert inflammasome activation. Infection with herpesviruses induces the activation of diverse inflammasomes, including AIM2 and IFI16 inflammasomes; however, how Kaposi's sarcoma-associated herpesvirus (KSHV) counteracts inflammasome activation largely remains unclear. Here, we reveal that the KSHV ORF37-encoded SOX protein suppresses AIM2 inflammasome activation independent of its viral DNA exonuclease activity and host mRNA turnover. SOX interacts with the AIM2 HIN domain through the C-terminal Motif VII region and disrupts AIM2:dsDNA polymerization and ASC recruitment and oligomerization. The Y443A or F444A mutation of SOX abolishes the inhibition of AIM2 inflammasome without disrupting SOX nuclease activity, and a short SOX peptide is capable of inhibiting AIM2 inflammasome activation; consequently, infection with SOX-null, Y443A, or F444A Bac16 recombinant viruses results in robust inflammasome activation, suppressed lytic replication, and increased pyroptosis in human lymphatic endothelial cells in an AIM2-dependent manner. These results reveal that KSHV SOX suppresses AIM2 inflammasome activation to promote KSHV lytic replication and inhibit pyroptosis, representing a unique mechanism for evasion of inflammasome activation during KSHV lytic cycle.
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Affiliation(s)
- Xiaolin Zhang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
| | - Qingping Lan
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
| | - Mingyu Zhang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
| | - Fan Wang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
| | - Keyi Shi
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
| | - Xiaojuan Li
- College of Clinical Medicine, Hubei University of Chinese Medicine, Wuhan, Hubei430061, China
| | - Ersheng Kuang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong510080, China
- Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Ministry of Education, Guangzhou, Guangdong510080, China
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13
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Xu J, Xue Y, Bolinger AA, Li J, Zhou M, Chen H, Li H, Zhou J. Therapeutic potential of salicylamide derivatives for combating viral infections. Med Res Rev 2023; 43:897-931. [PMID: 36905090 PMCID: PMC10247541 DOI: 10.1002/med.21940] [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: 11/23/2021] [Revised: 11/09/2022] [Accepted: 02/26/2023] [Indexed: 03/12/2023]
Abstract
Since time immemorial human beings have constantly been fighting against viral infections. The ongoing and devastating coronavirus disease 2019 pandemic represents one of the most severe and most significant public health emergencies in human history, highlighting an urgent need to develop broad-spectrum antiviral agents. Salicylamide (2-hydroxybenzamide) derivatives, represented by niclosamide and nitazoxanide, inhibit the replication of a broad range of RNA and DNA viruses such as flavivirus, influenza A virus, and coronavirus. Moreover, nitazoxanide was effective in clinical trials against different viral infections including diarrhea caused by rotavirus and norovirus, uncomplicated influenza A and B, hepatitis B, and hepatitis C. In this review, we summarize the broad antiviral activities of salicylamide derivatives, the clinical progress, and the potential targets or mechanisms against different viral infections and highlight their therapeutic potential in combating the circulating and emerging viral infections in the future.
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Affiliation(s)
- Jimin Xu
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Yu Xue
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Andrew A. Bolinger
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Jun Li
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Mingxiang Zhou
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Haiying Chen
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Hongmin Li
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona 85721, United States
| | - Jia Zhou
- Chemical Biology Program, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, Texas 77555, United States
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14
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Haidar Ahmad S, El Baba R, Herbein G. Polyploid giant cancer cells, cytokines and cytomegalovirus in breast cancer progression. Cancer Cell Int 2023; 23:119. [PMID: 37340387 DOI: 10.1186/s12935-023-02971-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 06/12/2023] [Indexed: 06/22/2023] Open
Abstract
BACKGROUND Breast cancer is the most common cancer among women. Accumulated evidence over the past decades indicates a very high prevalence of human cytomegalovirus (HCMV) in breast cancer. High-risk HCMV strains possess a direct oncogenic effect displayed by cellular stress, polyploid giant cancer cells (PGCCs) generation, stemness, and epithelial-to-mesenchymal transition (EMT) leading to cancer of aggressive phenotype. Breast cancer development and progression have been regulated by several cytokines where the latter can promote cancer cell survival, help in tumor immune evasion, and initiate the EMT process, thereby resulting in invasion, angiogenesis, and breast cancer metastasis. In the present study, we screened cytokines expression in cytomegalovirus-transformed HMECs (CTH cells) cultures infected with HCMV high-risk strains namely, HCMV-DB and BL, as well as breast cancer biopsies, and analyzed the association between cytokines production, PGCCs count, and HCMV presence in vitro and in vivo. METHODS In CTH cultures and breast cancer biopsies, HCMV load was quantified by real-time qPCR. PGCCs count in CTH cultures and breast cancer biopsies was identified based on cell morphology and hematoxylin and eosin staining, respectively. CTH supernatants were evaluated for the production of TGF-β, IL-6, IL1-β, and IL-10 by ELISA assays. The above-mentioned cytokines expression was assessed in breast cancer biopsies using reverse transcription-qPCR. The correlation analyses were performed using Pearson correlation test. RESULTS The revealed PGCCs/cytokine profile in our in vitro CTH model matched that of the breast cancer biopsies, in vivo. Pronounced cytokine expression and PGCCs count were detected in particularly CTH-DB cultures and basal-like breast cancer biopsies. CONCLUSIONS The analysis of cytokine profiles in PGCCs present mostly in basal-like breast cancer biopsies and derived from CTH cells chronically infected with the high-risk HCMV strains might have the potential to provide novel therapies such as cytokine-based immunotherapy which is a promising field in cancer treatments.
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Affiliation(s)
- Sandy Haidar Ahmad
- Department Pathogens and Inflammation-EPILAB, EA4266, University of France-Comté, 16 Route de Gray, 25030, Besançon Cedex, France
| | - Ranim El Baba
- Department Pathogens and Inflammation-EPILAB, EA4266, University of France-Comté, 16 Route de Gray, 25030, Besançon Cedex, France
| | - Georges Herbein
- Department Pathogens and Inflammation-EPILAB, EA4266, University of France-Comté, 16 Route de Gray, 25030, Besançon Cedex, France.
- Department of Virology, CHRU Besancon, Besancon, France.
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15
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Manners O, Baquero-Perez B, Mottram TJ, Yonchev ID, Trevelyan CJ, Harper KL, Menezes S, Patterson MR, Macdonald A, Wilson SA, Aspden JL, Whitehouse A. m 6A Regulates the Stability of Cellular Transcripts Required for Efficient KSHV Lytic Replication. Viruses 2023; 15:1381. [PMID: 37376680 DOI: 10.3390/v15061381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
The epitranscriptomic modification N6-methyladenosine (m6A) is a ubiquitous feature of the mammalian transcriptome. It modulates mRNA fate and dynamics to exert regulatory control over numerous cellular processes and disease pathways, including viral infection. Kaposi's sarcoma-associated herpesvirus (KSHV) reactivation from the latent phase leads to the redistribution of m6A topology upon both viral and cellular mRNAs within infected cells. Here we investigate the role of m6A in cellular transcripts upregulated during KSHV lytic replication. Our results show that m6A is crucial for the stability of the GPRC5A mRNA, whose expression is induced by the KSHV latent-lytic switch master regulator, the replication and transcription activator (RTA) protein. Moreover, we demonstrate that GPRC5A is essential for efficient KSHV lytic replication by directly regulating NFκB signalling. Overall, this work highlights the central importance of m6A in modulating cellular gene expression to influence viral infection.
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Affiliation(s)
- Oliver Manners
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Belinda Baquero-Perez
- Molecular Virology Unit, Department of Medicine and Life Sciences, Universitat Pompeu Fabra, 08003 Barcelona, Spain
| | - Timothy J Mottram
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Ivaylo D Yonchev
- Sheffield Institute for Nucleic Acids, School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
| | - Christopher J Trevelyan
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Katherine L Harper
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Sarah Menezes
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Molly R Patterson
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Andrew Macdonald
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
| | - Stuart A Wilson
- Sheffield Institute for Nucleic Acids, School of Biosciences, University of Sheffield, Firth Court, Western Bank, Sheffield S10 2TN, UK
| | - Julie L Aspden
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
- LeedsOmics, University of Leeds, Leeds LS2 9JT, UK
| | - Adrian Whitehouse
- School of Molecular and Cellular Biology, Faculty of Biological Sciences and Astbury Centre of Structural Molecular Biology, University of Leeds, Leeds LS2 9JT, UK
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown 6140, South Africa
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16
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Calhoun JC, Damania B, Griffith JD, Costantini LM. Electron microscopy mapping of the DNA-binding sites of monomeric, dimeric, and multimeric KSHV RTA protein. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.01.538939. [PMID: 37205529 PMCID: PMC10187201 DOI: 10.1101/2023.05.01.538939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Molecular interactions between viral DNA and viral-encoded protein are a prerequisite for successful herpesvirus replication and production of new infectious virions. Here, we examined how the essential Kaposi's sarcoma-associated herpesvirus (KSHV) protein, RTA, binds to viral DNA using transmission electron microscopy (TEM). Previous studies using gel-based approaches to characterize RTA binding are important for studying the predominant form(s) of RTA within a population and identifying the DNA sequences that RTA binds with high affinity. However, using TEM we were able to examine individual protein-DNA complexes and capture the various oligomeric states of RTA when bound to DNA. Hundreds of images of individual DNA and protein molecules were collected and then quantified to map the DNA binding positions of RTA bound to the two KSHV lytic origins of replication encoded within the KSHV genome. The relative size of RTA or RTA bound to DNA were then compared to protein standards to determine whether RTA complexed with DNA was monomeric, dimeric, or formed larger oligomeric structures. We successfully analyzed a highly heterogenous dataset and identified new binding sites for RTA. This provides direct evidence that RTA forms dimers and high order multimers when bound to KSHV origin of replication DNA sequences. This work expands our understanding of RTA binding, and demonstrates the importance of employing methodologies that can characterize highly heterogenic populations of proteins. Importance Kaposi's sarcoma-associated herpesvirus (KSHV) is a human herpesvirus associated with several human cancers, typically in patients with compromised immune systems. Herpesviruses establish lifelong infections in hosts in part due to the two phases of infection: the dormant and active phases. Effective antiviral treatments to prevent the production of new viruses are needed to treat KSHV. A detailed microscopy-based investigation of the molecular interactions between viral protein and viral DNA revealed how protein-protein interactions play a role in DNA binding specificity. This analysis will lead to a more in depth understanding of KSHV DNA replication and serve as the basis for anti-viral therapies that disrupt and prevent the protein-DNA interactions, thereby decreasing spread to new hosts.
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Affiliation(s)
- Jayla C. Calhoun
- Biological and Biomedical Sciences Department, North Carolina Central University, Durham, North Carolina, USA
| | - Blossom Damania
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Jack D. Griffith
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Lindsey M. Costantini
- Biological and Biomedical Sciences Department, North Carolina Central University, Durham, North Carolina, USA
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17
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Naipauer J, Mesri EA. The Kaposi's sarcoma progenitor enigma: KSHV-induced MEndT-EndMT axis. Trends Mol Med 2023; 29:188-200. [PMID: 36635149 PMCID: PMC9957928 DOI: 10.1016/j.molmed.2022.12.003] [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: 09/29/2022] [Revised: 12/02/2022] [Accepted: 12/13/2022] [Indexed: 01/11/2023]
Abstract
Endothelial-to-mesenchymal transition has been described in tumors as a source of mesenchymal stroma, while the reverse process has been proposed in tumor vasculogenesis and angiogenesis. A human oncogenic virus, Kaposi's sarcoma herpes virus (KSHV), can regulate both processes in order to transit through this transition 'boulevard' when infecting KS oncogenic progenitor cells. Endothelial or mesenchymal circulating progenitor cells can serve as KS oncogenic progenitors recruited by inflammatory cytokines because KSHV can reprogram one into the other through endothelial-to-mesenchymal and mesenchymal-to-endothelial transitions. Through these novel insights, the identity of the potential oncogenic progenitor of KS is revealed while gaining knowledge of the biology of the mesenchymal-endothelial differentiation axis and pointing to this axis as a therapeutic target in KS.
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Affiliation(s)
- Julian Naipauer
- Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina; Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA; University of Miami- Center for AIDS Research (UM-CFAR)/Sylvester Comprehensive Cancer Center (CCC) Argentina Consortium for Research and Training in Virally Induced AIDS-Malignancies, University of Miami Miller School of Medicine, Miami, FL, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - Enrique A Mesri
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA; University of Miami- Center for AIDS Research (UM-CFAR)/Sylvester Comprehensive Cancer Center (CCC) Argentina Consortium for Research and Training in Virally Induced AIDS-Malignancies, University of Miami Miller School of Medicine, Miami, FL, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, USA
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18
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Rafeeq MM, Habib AH, Nahhas AF, Binothman N, Aljadani M, Almulhim J, Sain ZM, Alam MZ, Alturki NA, Alam Q, Manish M, Singh RK. Targeting Kaposi's sarcoma associated herpesvirus encoded protease (ORF17) by a lysophosphatidic acid molecule for treating KSHV associated diseases. Front Cell Dev Biol 2023; 11:1060156. [PMID: 36733461 PMCID: PMC9888664 DOI: 10.3389/fcell.2023.1060156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 01/05/2023] [Indexed: 01/19/2023] Open
Abstract
Kaposi's sarcoma associated herpesvirus (KSHV) is causative agent of Kaposi's sarcoma, Multicentric Castleman Disease and Pleural effusion lymphoma. KSHV-encoded ORF17 encodes a protease which cleaves -Ala-Ala-, -Ala-Ser- or -Ala-Thr-bonds. The protease plays an important role in assembly and maturation of new infective virions. In the present study, we investigated expression pattern of KSHV-encoded protease during physiologically allowed as well as chemically induced reactivation condition. The results showed a direct and proportionate relationship between ORF17 expression with reactivation time. We employed virtual screening on a large database of natural products to identify an inhibitor of ORF17 for its plausible targeting and restricting Kaposi's sarcoma associated herpesvirus assembly/maturation. A library of 307,814 compounds of biological origin (A total 481,799 structures) has been used as a screen library. 1-oleoyl-2-hydroxy-sn-glycero-3-phospho-(1'-myo-inositol) was highly effective against ORF17 in in-vitro experiments. The screened compound was tested for the cytotoxic effect and potential for inhibiting Kaposi's sarcoma associated herpesvirus production upon induced reactivation by hypoxia, TPA and butyric acid. Treatment of reactivated KSHV-positive cells with 1-oleoyl-2-hydroxy-sn-glycero-3-phospho-(1'-myo-inositol) resulted in significant reduction in the production of Kaposi's sarcoma associated herpesvirus. The study identified a lysophosphatidic acid molecule for alternate strategy to inhibit KSHV-encoded protease and target Kaposi's sarcoma associated herpesvirus associated malignancies.
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Affiliation(s)
- Misbahuddin M Rafeeq
- Department of Pharmacology, Faculty of Medicine, Rabigh, King Abdulaziz University, Jeddah, KSA
| | - Alaa Hamed Habib
- Department of Physiology, Faculty of Medicine, King Abdulaziz University, Jeddah, KSA
| | - Alaa F. Nahhas
- Biochemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, KSA
| | - Najat Binothman
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Majidah Aljadani
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Jawaher Almulhim
- Department of Biological Sciences, King Faisal University, Alahsa, KSA
| | - Ziaullah M Sain
- Department of Microbiology, Faculty of Medicine, Rabigh, King Abdulaziz University, Jeddah, KSA
| | - Mohammad Zubair Alam
- Pre-Clinical Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia,Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Norah A Alturki
- Clinical Laboratory Science Department, College of Applied Medical Science, King Saud University, Riyadh, Saudi Arabia
| | - Qamre Alam
- Medical Genomics Research Department, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Science, Riyadh, Saudi Arabia
| | - Manish Manish
- School of Computer and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Rajnish Kumar Singh
- Molecular Biology Unit, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India,*Correspondence: Rajnish Kumar Singh,
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19
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Lee MJ, Lee J, Kang SK, Wirth D, Yoo SM, Park C, Lee MS. CXCL1 confers a survival advantage in Kaposi's sarcoma-associated herpesvirus-infected human endothelial cells through STAT3 phosphorylation. J Med Virol 2023; 95. [PMID: 35869037 DOI: 10.1002/jmv.28020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/05/2022] [Accepted: 07/20/2022] [Indexed: 01/11/2023]
Abstract
Many cytokines produced by Kaposi's sarcoma-associated herpesvirus (KSHV)-infected cells have been shown to participate in the pathogenesis of KSHV. Determination of the exact role of cytokines in Kaposi's sarcoma (KS) pathogenesis is limited, however, by the difficulty to manipulate the target genes in human endothelial cells. In this study, we sought to elucidate the role of cytokines in KSHV-infected human immortalized endothelial cell line (HuARLT cells) by knockout (KO) of the corresponding target genes using the CRISPR/Cas9 system. The cytokine production profile of KSHV-infected HuARLT cells was analyzed using a protein array, and several cytokines were found to be highly upregulated following KSHV infection. This study focused on CXCL1, which was investigated by knocked out in HuARLT cells. KSHV-infected CXCL1 KO cells underwent increased cell death compared to KSHV-infected wild-type (WT) cells and mock-infected CXCL1 KO cells. Lytic replication was not observed in KSHV-infected WT nor CXCL1 KO cells. Phosphorylation of STAT3 was significantly suppressed in KSHV-infected CXCL1 KO cells. Additionally, inhibitors of STAT3 and CXCL1 induced cell death in KSHV-infected endothelial cells. Our results show that CXCL1 production is required for the survival of KSHV-infected endothelial cells, and the CXCL1 to STAT3 phosphorylation signaling pathway may be a therapeutic target for KS.
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Affiliation(s)
- Myung-Ju Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Jisu Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Su-Kyung Kang
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Dagmar Wirth
- Model Systems for Infection and Immunity, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Seung-Min Yoo
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Changhoon Park
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
| | - Myung-Shin Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, Republic of Korea
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20
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Bortolotti D, Corazza M, Rotola A, Bencivelli D, Schiuma G, Danese E, Rizzo S, Beltrami S, Rizzo R, Borghi A. Inhibitory KIR2DL2 receptor and HHV-8 in classic or endemic Kaposi sarcoma. Clin Exp Med 2023; 23:79-85. [PMID: 35169985 PMCID: PMC9939483 DOI: 10.1007/s10238-022-00798-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 01/21/2022] [Indexed: 11/28/2022]
Abstract
KIR2DL2, an inhibitory Killer cell Immunoglobulin-like Receptor (KIR), has been shown to predispose to the development of several herpesvirus-associated diseases by inhibiting the efficiency of Natural Killer (NK) cells against virus-infected cells. The aim of this observational study was to assess the prevalence of KIR2DL2 and Human Herpes Virus 8 (HHV8) in patients affected with classical and endemic Kaposi sarcoma (KS), as well as in controls. Blood samples collected from 17 Caucasian, HIV-negative, immunocompetent patients affected with classical KS (c-KS), 12 African, HIV-negative patients with endemic KS (e-KS), 83 healthy subjects and 26 psoriatic patients were processed for genotypization by PCR for two KIR alleles, such as KIR2DL2 and KIR2DL3 and analyzed for HHV-8 presence. The totality of both c-KS and e-KS patients presented HHV-8 infection, whereas HHV8 was found in 26.9% of psoriatic subjects and 19.3% of healthy subjects. KIR2DL2 was found in the 76.5% of c-KS subjects, while the receptor was found in 41.7% of the e-KS group, 34.6% of psoriatic patients and 43.4% of healthy controls (p < 0.0001). A significantly higher prevalence of KIR2DL2 in c-KS patients than in all the other subjects was also confirmed comparing age-matched groups. Based on these results, the inhibitory KIR2DL2 genotype appears to be a possible cofactor which increases the risk of developing c-KS in HHV8-positive, immunocompetent subjects, while it seems less relevant in e-KS pathogenesis.
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Affiliation(s)
- Daria Bortolotti
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Monica Corazza
- Section of Dermatology and Infectious Diseases, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Antonella Rotola
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Dario Bencivelli
- Section of Dermatology and Infectious Diseases, Department of Medical Sciences, University of Ferrara, Ferrara, Italy.
| | - Giovanna Schiuma
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Elisabetta Danese
- Section of Dermatology and Infectious Diseases, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Sabrina Rizzo
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Silvia Beltrami
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Roberta Rizzo
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Ferrara, Italy
| | - Alessandro Borghi
- Section of Dermatology and Infectious Diseases, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
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21
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Upregulation of ATF4-LAMP3 Axis by ORF45 Facilitates Lytic Replication of Kaposi's Sarcoma-Associated Herpesvirus. J Virol 2022; 96:e0145622. [PMID: 36377873 PMCID: PMC9749464 DOI: 10.1128/jvi.01456-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is a γ-oncogenic herpesvirus, and both lytic and latent infections play important roles in its pathogenesis and tumorigenic properties. Multiple cellular pathways and diverse mediators are hijacked by viral proteins and are used to support KSHV lytic replication. In previous studies, we revealed that KSHV ORF45 promoted KSHV transcription and translation by inducing sustained p90 ribosomal S6 kinase (RSK) activation and the phosphorylation of its substrates c-Fos and eIF4B. However, the cellular mediators required for lytic replication remain largely unknown. Here, we reveal that ORF45 activates eIF2α phosphorylation and ATF4 translation and then upregulates the expression of lysosome-associated membrane protein 3 (LAMP3) in an ATF4-dependent manner during KSHV lytic replication. Consequently, LAMP3 promotes Akt and ERK activation and then facilitates lytic gene expression and virion production. Furthermore, ATF4 enhances lytic replication through LAMP3, and LAMP3 acts in an ATF4-independent manner. Our findings suggest that the ATF4-LAMP3 axis is upregulated by ORF45 through ER stress activation during the KSHV lytic life cycle and, in turn, facilitates optimal lytic replication. IMPORTANCE The lytic replication of Kaposi's sarcoma-associated herpesvirus (KSHV) reprograms cellular transcription and translation to generate viral proteins and virion particles. Here, we show that the mediator of ER stress ATF4 and the expression of the downstream gene LAMP3 are upregulated by ORF45 during lytic replication. Consequently, increased LAMP3 expression activates Akt and ERK and promotes lytic replication. Although several UPR transcription factors are able to promote KSHV lytic replication, the proviral effect of ATF4 on lytic replication is attenuated by LAMP3 silencing, whereas the effect of LAMP3 does not directly require ATF4 expression, indicating that LAMP3 primarily exerts effects on KSHV lytic replication downstream of ATF4 and ER stress. Taken together, our findings suggest that the ORF45-upregulated ATF4-LAMP3 axis plays an essential role in KSHV lytic replication.
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22
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Alomari N, Totonchy J. IL-21 signaling promotes the establishment of KSHV infection in human tonsil lymphocytes by increasing differentiation and targeting of plasma cells. Front Immunol 2022; 13:1010274. [PMID: 36569889 PMCID: PMC9769966 DOI: 10.3389/fimmu.2022.1010274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 11/21/2022] [Indexed: 12/12/2022] Open
Abstract
Introduction Factors influencing Kaposi's sarcoma-associated herpesvirus (KSHV) transmission and the early stages of KSHV infection in the human immune system remain poorly characterized. KSHV is known to extensively manipulate the host immune system and the cytokine milieu, and cytokines are known to influence the progression of KSHV-associated diseases. Our previous work identified the early targeting of plasma cells for KSHV infection. In this study, we examine whether IL-21, a cytokine known to profoundly influence plasma cell fate, influences the early stages of KSHV infection in B lymphocytes. Methods Using our unique model of ex vivo KSHV infection in tonsil lymphocytes, we investigate the influence of IL-21 supplementation, IL-21 neutralization, the distribution of IL-21 receptor on B cell subsets and IL-21 secreting T cell subsets on the establishment of KSHV infection in human B cells. Results We show that IL-21 signaling promotes KSHV infection by promoting both total plasma cell numbers and increasing KSHV infection in plasma cells as early as 3 days post-infection. We further demonstrate that the synergistic effect of KSHV infection and IL-21 treatment on plasma cell frequencies is due to differentiation of new plasma cells from naïve B cell precursors. We examine T cells secreting IL-21 in our tonsil specimens and determine that IL-21 producing CD8+ central memory T cells are correlated with plasma cell frequencies and KSHV targeting of plasma cells. Discussion These results demonstrate the novel finding that differentiation of new plasma cells is involved in the early stages of KSHV infection in B cells, and that IL-21 signaling can potentiate this effect thereby increasing the overall magnitude of KSHV infection at early timepoints. These results suggest that IL-21 signaling represents a host-level susceptibility factor for the establishment of KSHV infection.
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23
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Desai S, Guddati AK. Bimodal Age Distribution in Cancer Incidence. World J Oncol 2022; 13:329-336. [PMID: 36660209 PMCID: PMC9822681 DOI: 10.14740/wjon1424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/05/2022] [Indexed: 12/26/2022] Open
Abstract
Cancer is caused by accumulation of genetic changes which include activation of protooncogenes and loss of tumor suppressor genes. The age-specific incidence of cancer in general increases with advancing age. However, some cancers exhibit a bimodal distribution. Commonly recognized cancers with bimodal age distribution include acute lymphoblastic leukemia, osteosarcoma, Hodgkin's lymphoma, germ cell tumors and breast cancer. Delayed infection hypothesis has been used to provide explanation for the early childhood peak in leukemias and lymphomas, whereas the peak at an older age is associated with accumulation of protooncogenes and weakened immune system. Further genetic analysis and histopathological variations point to distinctly different cancers, varying genetically and histologically, which are often combined under a single category of cancers. Tumor characteristics and age distribution of these cancers varies also by population groups and has further implications on cancer screening methods. Although significant advances have been made to explain the bimodal nature of such cancers, the specific genetic mechanisms for each age distribution remain to be elucidated. Further distinction among the different cancer subtypes may lead to improvements in individual risk assessments, prevention and enhancement of treatment strategies.
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Affiliation(s)
- Shreya Desai
- Division of Hematology/Oncology, Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Achuta K. Guddati
- Division of Hematology/Oncology, Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA,Corresponding Author: Achuta Kumar Guddati, Division of Hematology/Oncology, Georgia Cancer Center, Augusta University, Augusta, GA 30909, USA.
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24
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Viral Encoded miRNAs in Tumorigenesis: Theranostic Opportunities in Precision Oncology. Microorganisms 2022; 10:microorganisms10071448. [PMID: 35889167 PMCID: PMC9321719 DOI: 10.3390/microorganisms10071448] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/05/2022] [Accepted: 07/11/2022] [Indexed: 11/17/2022] Open
Abstract
About 15% of all human cancers have a viral etiology. Although progress has been made, understanding the viral oncogenesis and associated molecular mechanisms remain complex. The discovery of cellular miRNAs has led to major breakthroughs. Interestingly, viruses have also been discovered to encode their own miRNAs. These viral, small, non-coding miRNAs are also known as viral-miRNAs (v-miRNAs). Although the function of v-miRNAs largely remains to be elucidated, their role in tumorigenesis cannot be ignored. V-miRNAs have also been shown to exploit the cellular machinery to benefit viral replication and survival. Although the discovery of Hepatitis C virus (HCV), and its viral miRNAs, is a work in progress, the existence of HPV-, EBV-, HBV-, MCPyV- and KSHV-encoded miRNA has been documented. V-miRNAs have been shown to target host factors to advance tumorigenesis, evade and suppress the immune system, and deregulate both the cell cycle and the apoptotic machinery. Although the exact mechanisms of v-miRNAs-induced tumorigenesis are still unclear, v-miRNAs are active role-players in tumorigenesis, viral latency and cell transformation. Furthermore, v-miRNAs can function as posttranscriptional gene regulators of both viral and host genes. Thus, it has been proposed that v-miRNAs may serve as diagnostic biomarkers and therapeutic targets for cancers with a viral etiology. Although significant challenges exist in their clinical application, emerging reports demonstrate their potent role in precision medicine. This review will focus on the roles of HPV-, HCV-, EBV-, HBV-, MCPyV-, and KSHV-produced v-miRNAs in tumorigenesis, as effectors in immune evasion, as diagnostic biomarkers and as novel anti-cancer therapeutic targets. Finally, it will discuss the challenges and opportunities associated with v-miRNAs theranostics in precision oncology.
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25
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Lao M, Zhang X, Yang H, Bai X, Liang T. RCAN1-mediated calcineurin inhibition as a target for cancer therapy. Mol Med 2022; 28:69. [PMID: 35717152 PMCID: PMC9206313 DOI: 10.1186/s10020-022-00492-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 05/26/2022] [Indexed: 11/10/2022] Open
Abstract
Cancer is the leading cause of mortality worldwide. Regulator of calcineurin 1 (RCAN1), as a patent endogenous inhibitor of calcineurin, plays crucial roles in the pathogenesis of cancers. Except for hypopharyngeal and laryngopharynx cancer, high expression of RCAN1 inhibits tumor progression. Molecular antitumor functions of RCAN1 are largely dependent on calcineurin. In this review, we highlight current research on RCAN1 characteristics, and the interaction between RCAN1 and calcineurin. Moreover, the dysregulation of RCAN1 in various cancers is reviewed, and the potential of targeting RCAN1 as a new therapeutic approach is discussed.
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Affiliation(s)
- Mengyi Lao
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Innovation Center for the Study of Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary and Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China
| | - Xiaozhen Zhang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Innovation Center for the Study of Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary and Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China
| | - Hanshen Yang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Innovation Center for the Study of Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China.,Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary and Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China
| | - Xueli Bai
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Innovation Center for the Study of Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary and Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China.
| | - Tingbo Liang
- Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital, School of Medicine, Zhejiang University, 79 Qingchun Road, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Innovation Center for the Study of Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China. .,Zhejiang Provincial Clinical Research Center for the Study of Hepatobiliary and Pancreatic Diseases, Hangzhou, 310009, Zhejiang, China. .,Cancer Center, Zhejiang University, Hangzhou, 310058, Zhejiang, China.
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26
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Nehme Z, Pasquereau S, Haidar Ahmad S, El Baba R, Herbein G. Polyploid giant cancer cells, EZH2 and Myc upregulation in mammary epithelial cells infected with high-risk human cytomegalovirus. EBioMedicine 2022; 80:104056. [PMID: 35596973 PMCID: PMC9121245 DOI: 10.1016/j.ebiom.2022.104056] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 02/08/2023] Open
Abstract
Background Human cytomegalovirus (HCMV) infection has been actively implicated in complex neoplastic processes. Beyond oncomodulation, the molecular mechanisms that might underlie HCMV-induced oncogenesis are being extensively studied. Polycomb repressive complex 2 (PRC2) proteins, in particular enhancer of zeste homolog 2 (EZH2) are associated with cancer progression. Nevertheless, little is known about EZH2 activation in the context of HCMV infection and breast oncogenesis. Methods Herein, we identified EZH2 as a downstream target for HCMV-induced Myc upregulation upon acute and chronic infection with high-risk strains using a human mammary epithelial model. Findings We detected polyploidy and CMV-transformed HMECs (CTH) cells harboring HCMV and dynamically undergoing the giant cells cycle. Acquisition of embryonic stemness markers positively correlated with EZH2 and Myc expression. EZH2 inhibitors curtail sustained CTH cells’ malignant phenotype. Besides harboring polyploid giant cancer cells (PGCCs), tumorigenic breast biopsies were characterized by an enhanced EZH2 and Myc expression, with a strong positive correlation between EZH2 and Myc expression, and between PGCC count and EZH2/Myc expression in the presence of HCMV. Further, we isolated two HCMV strains from EZH2HighMycHigh basal-like tumors which replicate in MRC5 cells and transform HMECs toward CTH cells after acute infection. Interpretation Our data establish a potential link between HCMV-induced Myc activation, the subsequent EZH2 upregulation, and polyploidy induction. These data support the proposed tumorigenesis properties of EZH2/Myc, and allow the isolation of two oncogenic HCMV strains from EZH2HighMycHigh basal breast tumors while identifying EZH2 as a potential therapeutic target in the management of breast cancer, particularly upon HCMV infection. Funding This work was supported by grants from the University of Franche-Comté (UFC) (CR3300), the Région Franche-Comté (2021-Y-08292 and 2021-Y-08290) and the Ligue contre le Cancer (CR3304) to Georges Herbein. Zeina Nehme is a recipient of a doctoral scholarship from the municipality of Habbouch. Sandy Haidar Ahmad is recipient of a doctoral scholarship from Lebanese municipality. Ranim El Baba is a recipient of a doctoral scholarship from Hariri foundation for sustainable human development.
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Affiliation(s)
- Zeina Nehme
- Department Pathogens and Inflammation-EPILAB, EA4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 16 route de Gray, Besançon F-25030, France
| | - Sébastien Pasquereau
- Department Pathogens and Inflammation-EPILAB, EA4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 16 route de Gray, Besançon F-25030, France
| | - Sandy Haidar Ahmad
- Department Pathogens and Inflammation-EPILAB, EA4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 16 route de Gray, Besançon F-25030, France
| | - Ranim El Baba
- Department Pathogens and Inflammation-EPILAB, EA4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 16 route de Gray, Besançon F-25030, France
| | - Georges Herbein
- Department Pathogens and Inflammation-EPILAB, EA4266, Université de Franche-Comté, Université Bourgogne Franche-Comté (UBFC), 16 route de Gray, Besançon F-25030, France; Department of Virology, CHU Besançon, Besançon, France.
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27
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Wang Y, Li Y, Liang X, Xin S, Yang L, Cao P, Jiang M, Xin Y, Zhang S, Yang Y, Lu J. The implications of cell-free DNAs derived from tumor viruses as biomarkers of associated cancers. J Med Virol 2022; 94:4677-4688. [PMID: 35652186 DOI: 10.1002/jmv.27903] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/16/2022] [Accepted: 05/31/2022] [Indexed: 11/09/2022]
Abstract
Cancer is still ranked as a leading cause of death according to estimates from the World Health Organization (WHO) and the strong link between tumor viruses and human cancers have been proved for almost six decades. Cell-free DNA (cfDNA) has drawn enormous attention for its dynamic, instant, and noninvasive advantages as one popular type of cancer biomarker. cfDNAs are mainly released from apoptotic cells and exosomes released from cancer cells, including those infected with viruses. Although cfDNAs are present at low concentrations in peripheral blood, they can reflect tumor load with high sensitivity. Considering the relevance of the tumor viruses to the associated cancers, cfDNAs derived from viruses may serve as good biomarkers for the early screening, diagnosis, and treatment monitoring. In this review, we summarize the methods and newly developed analytic techniques for the detection of cfDNAs from different body fluids, and discuss the implications of cfDNAs derived from different tumor viruses in the detection and treatment monitoring of virus-associated cancers. A better understanding of cfDNAs derived from tumor viruses may help formulate novel anti-tumoral strategies to decrease the burden of cancers that attributed to viruses. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yiwei Wang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Yanling Li
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Xinyu Liang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
| | - Shuyu Xin
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Li Yang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Pengfei Cao
- Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China
| | - Mingjuan Jiang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Yujie Xin
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Senmiao Zhang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Yang Yang
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
| | - Jianhong Lu
- Hunan Cancer Hospital/the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410078, Hunan, China.,Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.,NHC Key Laboratory of Carcinogenesis, The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, 410078, Hunan, China.,Department of Hematology, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410080, Hunan, China.,China-Africa Research Center of Infectious Diseases, Central South University, Changsha, 410013, Hunan, China
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Kumar A, Lyu Y, Yanagihashi Y, Chantarasrivong C, Majerciak V, Salemi M, Wang KH, Inagaki T, Chuang F, Davis RR, Tepper CG, Nakano K, Izumiya C, Shimoda M, Nakajima KI, Merleev A, Zheng ZM, Campbell M, Izumiya Y. KSHV episome tethering sites on host chromosomes and regulation of latency-lytic switch by CHD4. Cell Rep 2022; 39:110788. [PMID: 35545047 PMCID: PMC9153692 DOI: 10.1016/j.celrep.2022.110788] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 02/11/2022] [Accepted: 04/14/2022] [Indexed: 12/25/2022] Open
Abstract
Kaposi sarcoma-associated herpesvirus (KSHV) establishes a latent infection in the cell nucleus, but where KSHV episomal genomes are tethered and the mechanisms underlying KSHV lytic reactivation are unclear. Here, we study the nuclear microenvironment of KSHV episomes and show that the KSHV latency-lytic replication switch is regulated via viral long non-coding (lnc)RNA-CHD4 (chromodomain helicase DNA binding protein 4) interaction. KSHV episomes localize with CHD4 and ADNP proteins, components of the cellular ChAHP complex. The CHD4 and ADNP proteins occupy the 5'-region of the highly inducible lncRNAs and terminal repeats of the KSHV genome together with latency-associated nuclear antigen (LANA). Viral lncRNA binding competes with CHD4 DNA binding, and KSHV reactivation sequesters CHD4 from the KSHV genome, which is also accompanied by detachment of KSHV episomes from host chromosome docking sites. We propose a model in which robust KSHV lncRNA expression determines the latency-lytic decision by regulating LANA/CHD4 binding to KSHV episomes.
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Affiliation(s)
- Ashish Kumar
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Yuanzhi Lyu
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | | | | | - Vladimir Majerciak
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, National Cancer Institute, NIH, Frederick, MD 21702, USA
| | - Michelle Salemi
- Genome Center, Proteomics Core, Genome and Biomedical Sciences Facility, UC Davis, Davis, CA 95616, USA
| | - Kang-Hsin Wang
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Tomoki Inagaki
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Frank Chuang
- Department of Biochemistry and Molecular Medicine, School of Medicine, UC Davis, Sacramento, CA 95817, USA
| | - Ryan R Davis
- Department of Pathology and Laboratory Medicine, School of Medicine, UC Davis, Sacramento, CA 95817, USA
| | - Clifford G Tepper
- Department of Biochemistry and Molecular Medicine, School of Medicine, UC Davis, Sacramento, CA 95817, USA; Viral Oncology and Pathogen-Associated Malignancies Initiative, UC Davis Comprehensive Cancer Center, Sacramento, CA 95817, USA
| | - Kazushi Nakano
- Lifescience Division, Lifematics, Osaka, Osaka 541-0046, Japan
| | - Chie Izumiya
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Michiko Shimoda
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA; Viral Oncology and Pathogen-Associated Malignancies Initiative, UC Davis Comprehensive Cancer Center, Sacramento, CA 95817, USA
| | - Ken-Ichi Nakajima
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Alexander Merleev
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA
| | - Zhi-Ming Zheng
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, National Cancer Institute, NIH, Frederick, MD 21702, USA
| | - Mel Campbell
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA.
| | - Yoshihiro Izumiya
- Department of Dermatology School of Medicine, University of California Davis (UC Davis), Sacramento, CA 95817, USA; Department of Biochemistry and Molecular Medicine, School of Medicine, UC Davis, Sacramento, CA 95817, USA; Viral Oncology and Pathogen-Associated Malignancies Initiative, UC Davis Comprehensive Cancer Center, Sacramento, CA 95817, USA.
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Anorectal pathology in the HIV population: a guide for radiologists. Abdom Radiol (NY) 2022; 47:1762-1774. [PMID: 35284963 DOI: 10.1007/s00261-022-03470-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 11/01/2022]
Abstract
Patients with human immunodeficiency virus (HIV) can present with a wide range of different acute and chronic pathologies. Anorectal conditions are particularly common in this unique patient population, including pathologies, such as proctitis, anorectal abscess, anorectal fistula, and anal squamous cell carcinoma. The radiologist plays a critical role in the assessment of these common forms of anorectal disease, as these conditions can present with various findings on imaging assessment. Pelvic CT, MRI, and FDG-PET/CT are among the most common modalities used for assessment of anorectal disease in the HIV patient population. Knowledge of the fundamental clinical and imaging findings associated with these pathologies in HIV patients is critical for radiologists.
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Lange PT, White MC, Damania B. Activation and Evasion of Innate Immunity by Gammaherpesviruses. J Mol Biol 2022; 434:167214. [PMID: 34437888 PMCID: PMC8863980 DOI: 10.1016/j.jmb.2021.167214] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/11/2021] [Accepted: 08/13/2021] [Indexed: 12/20/2022]
Abstract
Gammaherpesviruses are ubiquitous pathogens that establish lifelong infections in the vast majority of adults worldwide. Importantly, these viruses are associated with numerous malignancies and are responsible for significant human cancer burden. These virus-associated cancers are due, in part, to the ability of gammaherpesviruses to successfully evade the innate immune response throughout the course of infection. In this review, we will summarize the current understanding of how gammaherpesviruses are detected by innate immune sensors, how these viruses evade recognition by host cells, and how this knowledge can inform novel therapeutic approaches for these viruses and their associated diseases.
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Affiliation(s)
- Philip T Lange
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. https://twitter.com/langept
| | - Maria C White
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA. https://twitter.com/maria_c_white
| | - Blossom Damania
- Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Microbiology and Immunology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
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31
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Ramaswami R, Polizzotto MN, Lurain K, Wyvill KM, Widell A, George J, Goncalves P, Steinberg SM, Whitby D, Uldrick TS, Yarchoan R. Safety, Activity, and Long-term Outcomes of Pomalidomide in the Treatment of Kaposi Sarcoma among Individuals with or without HIV Infection. Clin Cancer Res 2022; 28:840-850. [PMID: 34862247 PMCID: PMC8898289 DOI: 10.1158/1078-0432.ccr-21-3364] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 11/08/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
PURPOSE Kaposi sarcoma (KS) is caused by Kaposi sarcoma herpesvirus (KSHV), also known as human herpesvirus 8 (HHV-8). KS, which develops most frequently among people with HIV, is generally treated with chemotherapy, but these drugs have acute and cumulative toxicities. We previously described initial results of a trial of pomalidomide, an oral immunomodulatory derivative of thalidomide, in patients with KS. Here, we present results on the full cohort and survival outcomes. PATIENTS AND METHODS Participants with KS with or without HIV were treated with pomalidomide 5 mg once daily for 21 days per 28-day cycle with aspirin 81 mg daily for thromboprophylaxis. Participants with HIV received antiretroviral therapy. Response was defined by modified version of the AIDS Clinical Trial Group KS criteria. We evaluated tumor responses (including participants who had a second course), adverse events, progression-free survival (PFS), and long-term outcomes. RESULTS Twenty-eight participants were enrolled. Eighteen (64%) were HIV positive and 21 (75%) had advanced (T1) disease. The overall response rate was 71%: 95% confidence interval (CI) 51%-87%. Twelve of 18 HIV-positive (67%; 95% CI, 41-87%) and 8 of 10 HIV-negative participants (80%; 95% CI, 44%-97%) had a response. Two of 4 participants who received a second course of pomalidomide had a partial response. The median PFS was 10.2 months (95% CI: 7.6-15.7 months). Grade 3 neutropenia was noted among 50% of participants. In the follow-up period, 3 participants with HIV had other KSHV-associated diseases. CONCLUSIONS Pomalidomide is a safe and active chemotherapy-sparing agent for the treatment of KS among individuals with or without HIV.
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Affiliation(s)
- Ramya Ramaswami
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Mark N Polizzotto
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Kathryn Lurain
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Kathleen M Wyvill
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Anaida Widell
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Jomy George
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Priscila Goncalves
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Seth M Steinberg
- Biostatistics and Data Management Section, Center for Cancer Research, National Cancer Institutes, National Institutes of Health
| | - Denise Whitby
- Viral Oncology Section, AIDS and Cancer Virus Program, Frederick National Laboratory for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Thomas S Uldrick
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
| | - Robert Yarchoan
- HIV/AIDS Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health
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32
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Morgens DW, Nandakumar D, Didychuk AL, Yang KJ, Glaunsinger BA. A Two-tiered functional screen identifies herpesviral transcriptional modifiers and their essential domains. PLoS Pathog 2022; 18:e1010236. [PMID: 35041709 PMCID: PMC8797222 DOI: 10.1371/journal.ppat.1010236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/28/2022] [Accepted: 12/29/2021] [Indexed: 11/19/2022] Open
Abstract
While traditional methods for studying large DNA viruses allow the creation of individual mutants, CRISPR/Cas9 can be used to rapidly create thousands of mutant dsDNA viruses in parallel, enabling the pooled screening of entire viral genomes. Here, we applied this approach to Kaposi’s sarcoma-associated herpesvirus (KSHV) by designing a sgRNA library containing all possible ~22,000 guides targeting the 154 kilobase viral genome, corresponding to one cut site approximately every 8 base pairs. We used the library to profile viral sequences involved in transcriptional activation of late genes, whose regulation involves several well characterized features including dependence on viral DNA replication and a known set of viral transcriptional activators. Upon phenotyping all possible Cas9-targeted viruses for transcription of KSHV late genes we recovered these established regulators and identified a new required factor (ORF46), highlighting the utility of the screening pipeline. By performing targeted deep sequencing of the viral genome to distinguish between knock-out and in-frame alleles created by Cas9, we identify the DNA binding but not catalytic domain of ORF46 to be required for viral DNA replication and thus late gene expression. Our pooled Cas9 tiling screen followed by targeted deep viral sequencing represents a two-tiered screening paradigm that may be widely applicable to dsDNA viruses.
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Affiliation(s)
- David W. Morgens
- Department of Plant and Microbial Biology, UC Berkeley, Berkeley, California, United States of America
- * E-mail: (DM); (BG)
| | - Divya Nandakumar
- Department of Plant and Microbial Biology, UC Berkeley, Berkeley, California, United States of America
| | - Allison L. Didychuk
- Department of Plant and Microbial Biology, UC Berkeley, Berkeley, California, United States of America
| | - Kevin J. Yang
- Department of Molecular and Cell Biology, UC Berkeley, Berkeley, California, United States of America
| | - Britt A. Glaunsinger
- Department of Plant and Microbial Biology, UC Berkeley, Berkeley, California, United States of America
- Department of Molecular and Cell Biology, UC Berkeley, Berkeley, California, United States of America
- Howard Hughes Medical Institute, UC Berkeley, Berkeley, California, United States of America
- * E-mail: (DM); (BG)
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33
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Rafat M, Yadegar N, Dadashi Z, Shams K, Mohammadi M, Abyar M. The prominent role of miR-942 in carcinogenesis of tumors. Adv Biomed Res 2022; 11:63. [PMID: 36133499 PMCID: PMC9483553 DOI: 10.4103/abr.abr_226_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 10/14/2021] [Accepted: 10/27/2021] [Indexed: 12/04/2022] Open
Abstract
As a family of short noncoding RNAs, MicroRNAs have been identified as possible biomarkers for cancer discovery and assist in therapy control due to their epigenetic involvement in gene expression and other cellular biological processes. In the present review, the evidence for reaching the clinical effect and the molecular mechanism of miR-942 in various kinds of cancer is amassed. Dysregulation of miR-942 amounts in different kinds of malignancies, as bladder cancer, esophageal squamous cell carcinoma, breast cancer, cervical cancer, gastric cancer, colorectal cancer, Kaposi's sarcoma, melanoma, Hepatocellular carcinoma, nonsmall-cell lung cancer, oral squamous cell carcinoma, osteosarcoma, ovarian cancer, pancreatic ductal adenocarcinoma, renal cell carcinoma, and prostate cancer has stated a considerable increase or decrease in its level indicating its function as oncogene or tumor suppressor. MiR-942 is included in cell proliferation, migration, and invasion through cell cycle pathways, including pathways of transforming growth factor-beta signaling pathways, Wnt pathway, JAK/STAT pathway, PI3K/AKT pathway, apoptosis pathway, hippo signaling pathway, lectin pathway, interferon-gamma signaling, signaling by G-protein coupled receptor, developmental genes, nuclear factor-kappa B pathway, Mesodermal commitment pathway, and T-cell receptor signaling in cancer. An important biomarker, MiR-942 is a potential candidate for prediction in several cancers. The present investigation introduced miR-942 as a prognostic marker for early discovery of tumor progression, metastasis, and development.
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34
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Méndez-Solís O, Bendjennat M, Naipauer J, Theodoridis PR, Ho JJD, Verdun RE, Hare JM, Cesarman E, Lee S, Mesri EA. Kaposi's sarcoma herpesvirus activates the hypoxia response to usurp HIF2α-dependent translation initiation for replication and oncogenesis. Cell Rep 2021; 37:110144. [PMID: 34965440 PMCID: PMC9121799 DOI: 10.1016/j.celrep.2021.110144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/19/2021] [Accepted: 11/29/2021] [Indexed: 12/19/2022] Open
Abstract
Kaposi's sarcoma herpesvirus (KSHV) is an angiogenesis-inducing oncovirus whose ability to usurp the oxygen-sensing machinery is central to its oncogenicity. By upregulating the hypoxia-inducible factors (HIFs), KSHV reprograms infected cells to a hypoxia-like state, triggering angiogenesis. Here we identify a link between KSHV replicative biology and oncogenicity by showing that KSHV's ability to regulate HIF2α levels and localization to the endoplasmic reticulum (ER) in normoxia enables translation of viral lytic mRNAs through the HIF2α-regulated eIF4E2 translation-initiation complex. This mechanism of translation in infected cells is critical for lytic protein synthesis and contributes to KSHV-induced PDGFRA activation and VEGF secretion. Thus, KSHV regulation of the oxygen-sensing machinery allows virally infected cells to initiate translation via the mTOR-dependent eIF4E1 or the HIF2α-dependent, mTOR-independent, eIF4E2. This "translation initiation plasticity" (TRIP) is an oncoviral strategy used to optimize viral protein expression that links molecular strategies of viral replication to angiogenicity and oncogenesis.
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Affiliation(s)
- Omayra Méndez-Solís
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Mourad Bendjennat
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Julian Naipauer
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Phaedra R Theodoridis
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - J J David Ho
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Ramiro E Verdun
- Cancer Epigenetics Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Medicine, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Joshua M Hare
- Department of Medicine, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Ethel Cesarman
- Department of Pathology and Laboratory Medicine, Weill Cornell Medicine, New York, NY 10021, USA
| | - Stephen Lee
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
| | - Enrique A Mesri
- Tumor Biology Program, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Miami Center for AIDS Research, Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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Chen W, Ding Y, Liu D, Lu Z, Wang Y, Yuan Y. Kaposi’s sarcoma-associated herpesvirus vFLIP promotes MEndT to generate hybrid M/E state for tumorigenesis. PLoS Pathog 2021; 17:e1009600. [PMID: 34936683 PMCID: PMC8735625 DOI: 10.1371/journal.ppat.1009600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 01/06/2022] [Accepted: 12/02/2021] [Indexed: 12/03/2022] Open
Abstract
Kaposi’s sarcoma (KS) is an angioproliferative and invasive tumor caused by Kaposi’s sarcoma-associated herpesvirus (KSHV). The cellular origin of KS tumor cells remains contentious. Recently, evidence has accrued indicating that KS may arise from KSHV-infected mesenchymal stem cells (MSCs) through mesenchymal-to-endothelial transition (MEndT), but the transformation process has been largely unknown. In this study, we investigated the KSHV-mediated MEndT process and found that KSHV infection rendered MSCs incomplete endothelial lineage differentiation and formed hybrid mesenchymal/endothelial (M/E) state cells characterized by simultaneous expression of mesenchymal markers Nestin/PDGFRA/α-SAM and endothelial markers CD31/PDPN/VEGFR2. The hybrid M/E cells have acquired tumorigenic phenotypes in vitro and the potential to form KS-like lesions after being transplanted in mice under renal capsules. These results suggest a homology of KSHV-infected MSCs with Kaposi’s sarcoma where proliferating KS spindle-shaped cells and the cells that line KS-specific aberrant vessels were also found to exhibit the hybrid M/E state. Furthermore, the genetic analysis identified KSHV-encoded FLICE inhibitory protein (vFLIP) as a crucial regulator controlling KSHV-induced MEndT and generating hybrid M/E state cells for tumorigenesis. Overall, KSHV-mediated MEndT that transforms MSCs to tumorigenic hybrid M/E state cells driven by vFLIP is an essential event in Kaposi’s sarcomagenesis. Kaposi’s sarcoma manifests as multifocal lesions with spindle cell proliferation, intense angiogenesis, and erythrocyte extravasation. Although the origin and malignant nature of KS remain contentious, it is established that KSHV infection with concomitant viral oncogene expression in normal cell progenitors causes KS. The mechanism of KSHV oncogenesis could be revealed through a reproduction of KS by infection of normal cells. This study reports that the KSHV infection of mesenchymal stem cells initiates mesenchymal-to-endothelial transition (MEndT) that generates mesenchymal/endothelial (M/E) hybrid state cells. The hybrid M/E cells acquired tumorigenic phenotypes, including tumor initiation, angiogenesis, migration, and the potential to form KS-like lesions after transplanted in mice. This finding faithfully recapitulates Kaposi’s sarcoma where proliferating KS spindle cells and the cells that line KS-specific aberrant vessels are also found to exhibit the hybrid M/E phenotype. We also found that KSHV-encoded viral FLICE inhibitory protein (vFLIP) plays a crucial role in promoting MEndT and the generation of M/E state cells. These results provide a new layer of evidence for KSHV-infected MSCs being the cell source of KS spindle cells and reveal novel insight into KS pathogenesis and viral tumorigenesis.
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Affiliation(s)
- Weikang Chen
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Yao Ding
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Dawei Liu
- Department of Pathology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhengzhou Lu
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Yan Wang
- Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, China
| | - Yan Yuan
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, Pennsylvania, United States of America
- * E-mail:
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36
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Swain M, Ageeli AA, Kasprzak W, Li M, Miller JT, Sztuba-Solinska J, Schneekloth J, Koirala D, Piccirili J, Fraboni AJ, Murelli RP, Wlodawer A, Shapiro B, Baird N, Le Grice SFJ. Dynamic bulge nucleotides in the KSHV PAN ENE triple helix provide a unique binding platform for small molecule ligands. Nucleic Acids Res 2021; 49:13179-13193. [PMID: 34871450 PMCID: PMC8682744 DOI: 10.1093/nar/gkab1170] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 10/24/2021] [Accepted: 11/18/2021] [Indexed: 11/14/2022] Open
Abstract
Cellular and virus-coded long non-coding (lnc) RNAs support multiple roles related to biological and pathological processes. Several lncRNAs sequester their 3' termini to evade cellular degradation machinery, thereby supporting disease progression. An intramolecular triplex involving the lncRNA 3' terminus, the element for nuclear expression (ENE), stabilizes RNA transcripts and promotes persistent function. Therefore, such ENE triplexes, as presented here in Kaposi's sarcoma-associated herpesvirus (KSHV) polyadenylated nuclear (PAN) lncRNA, represent targets for therapeutic development. Towards identifying novel ligands targeting the PAN ENE triplex, we screened a library of immobilized small molecules and identified several triplex-binding chemotypes, the tightest of which exhibits micromolar binding affinity. Combined biophysical, biochemical, and computational strategies localized ligand binding to a platform created near a dinucleotide bulge at the base of the triplex. Crystal structures of apo (3.3 Å) and ligand-soaked (2.5 Å) ENE triplexes, which include a stabilizing basal duplex, indicate significant local structural rearrangements within this dinucleotide bulge. MD simulations and a modified nucleoside analog interference technique corroborate the role of the bulge and the base of the triplex in ligand binding. Together with recently discovered small molecules that reduce nuclear MALAT1 lncRNA levels by engaging its ENE triplex, our data supports the potential of targeting RNA triplexes with small molecules.
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MESH Headings
- Base Sequence
- Crystallography, X-Ray
- Herpesvirus 8, Human/genetics
- Herpesvirus 8, Human/metabolism
- Herpesvirus 8, Human/physiology
- Humans
- Ligands
- Molecular Docking Simulation
- Molecular Dynamics Simulation
- Molecular Structure
- Nucleic Acid Conformation
- Nucleotides/genetics
- Nucleotides/metabolism
- Poly A/chemistry
- Poly A/genetics
- Poly A/metabolism
- RNA Stability/genetics
- RNA, Long Noncoding/chemistry
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
- RNA, Viral/chemistry
- RNA, Viral/genetics
- RNA, Viral/metabolism
- Sarcoma, Kaposi/virology
- Small Molecule Libraries/chemistry
- Small Molecule Libraries/metabolism
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Affiliation(s)
- Monalisa Swain
- Basic Research Laboratory, National Cancer Institute, Frederick, MD 21702, USA
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Abeer A Ageeli
- Department of Chemistry & Biochemistry, University of the Sciences, Philadelphia, PA 19104, USA
- Chemistry Department, Faculty of Science (Female Section), Jazan University, Jazan 82621, Saudi Arabia
| | - Wojciech K Kasprzak
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Mi Li
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
- Center for Structural Biology, National Cancer Institute, Frederick, MD 21702, USA
| | - Jennifer T Miller
- Basic Research Laboratory, National Cancer Institute, Frederick, MD 21702, USA
| | | | - John S Schneekloth
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD 21702, USA
| | - Deepak Koirala
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
| | - Joseph Piccirili
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
| | - Americo J Fraboni
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY, 11210, USA
| | - Ryan P Murelli
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY, 11210, USA
- PhD Program in Chemistry, The Graduate Center, City University of New York, New York, NY 10016, USA
- PhD Program in Biochemistry, The Graduate Center, City University of New York, New York, NY 10016, USA
| | - Alexander Wlodawer
- Center for Structural Biology, National Cancer Institute, Frederick, MD 21702, USA
| | - Bruce A Shapiro
- RNA Biology Laboratory, National Cancer Institute, Frederick, MD 21702, USA
| | - Nathan Baird
- Department of Chemistry & Biochemistry, University of the Sciences, Philadelphia, PA 19104, USA
| | - Stuart F J Le Grice
- Basic Research Laboratory, National Cancer Institute, Frederick, MD 21702, USA
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37
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MicroRNAs Encoded by Virus and Small RNAs Encoded by Bacteria Associated with Oncogenic Processes. Processes (Basel) 2021. [DOI: 10.3390/pr9122234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cancer is a deadly disease and, globally, represents the second leading cause of death in the world. Although it is a disease where several factors can help its development, virus induced infections have been associated with different types of neoplasms. However, in bacterial infections, their participation is not known for certain. Among the proposed approaches to oncogenesis risks in different infections are microRNAs (miRNAs). These are small molecules composed of RNA with a length of 22 nucleotides capable of regulating gene expression by directing protein complexes that suppress the untranslated region of mRNA. These miRNAs and other recently described, such as small RNAs (sRNAs), are deregulated in the development of cancer, becoming promising biomarkers. Thus, resulting in a study possibility, searching for new tools with diagnostic and therapeutic approaches to multiple oncological diseases, as miRNAs and sRNAs are main players of gene expression and host–infectious agent interaction. Moreover, sRNAs with limited complementarity are similar to eukaryotic miRNAs in their ability to modulate the activity and stability of multiple mRNAs. Here, we will describe the regulatory RNAs from viruses that have been associated with cancer and how sRNAs in bacteria can be related to this disease.
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Shimoda M, Lyu Y, Wang KH, Kumar A, Miura H, Meckler JF, Davis RR, Chantarasrivong C, Izumiya C, Tepper CG, Nakajima KI, Tuscano J, Barisone G, Izumiya Y. KSHV transactivator-derived small peptide traps coactivators to attenuate MYC and inhibits leukemia and lymphoma cell growth. Commun Biol 2021; 4:1330. [PMID: 34857874 PMCID: PMC8639922 DOI: 10.1038/s42003-021-02853-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 11/02/2021] [Indexed: 12/14/2022] Open
Abstract
In herpesvirus replicating cells, host cell gene transcription is frequently down-regulated because important transcriptional apparatuses are appropriated by viral transcription factors. Here, we show a small peptide derived from the Kaposi's sarcoma-associated herpesvirus transactivator (K-Rta) sequence, which attenuates cellular MYC expression, reduces cell proliferation, and selectively kills cancer cell lines in both tissue culture and a xenograft tumor mouse model. Mechanistically, the peptide functions as a decoy to block the recruitment of coactivator complexes consisting of Nuclear receptor coactivator 2 (NCOA2), p300, and SWI/SNF proteins to the MYC promoter in primary effusion lymphoma cells. Thiol(SH)-linked alkylation for the metabolic sequencing of RNA (SLAM seq) with target-transcriptional analyses further confirm that the viral peptide directly attenuates MYC and MYC-target gene expression. This study thus provides a unique tool to control MYC activation, which may be used as a therapeutic payload to treat MYC-dependent diseases such as cancers and autoimmune diseases.
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Affiliation(s)
- Michiko Shimoda
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA.
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA.
| | - Yuanzhi Lyu
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Kang-Hsin Wang
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Ashish Kumar
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Hiroki Miura
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Joshua F Meckler
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
- Department of Internal Medicine, School of Medicine, UC Davis, Sacramento, CA, USA
| | - Ryan R Davis
- Department of Pathology and Laboratory Medicine, School of Medicine, UC Davis, Sacramento, CA, USA
| | | | - Chie Izumiya
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Clifford G Tepper
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
- Department of Biochemistry and Molecular Medicine, School of Medicine, UC Davis, Sacramento, CA, USA
| | - Ken-Ichi Nakajima
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA
| | - Joseph Tuscano
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
- Department of Internal Medicine, School of Medicine, UC Davis, Sacramento, CA, USA
| | - Gustavo Barisone
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
- Department of Internal Medicine, School of Medicine, UC Davis, Sacramento, CA, USA
| | - Yoshihiro Izumiya
- Department of Dermatology, School of Medicine, University of California Davis (UC Davis), Sacramento, CA, USA.
- UC Davis Comprehensive Cancer Center, Sacramento, CA, USA.
- Department of Biochemistry and Molecular Medicine, School of Medicine, UC Davis, Sacramento, CA, USA.
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Li T, Gao SJ. Metabolic reprogramming and metabolic sensors in KSHV-induced cancers and KSHV infection. Cell Biosci 2021; 11:176. [PMID: 34579773 PMCID: PMC8475840 DOI: 10.1186/s13578-021-00688-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/10/2021] [Indexed: 12/05/2022] Open
Abstract
Kaposi’s sarcoma-associated herpesvirus (KSHV) is an oncogenic gammaherpesvirus associated with several human cancers. KSHV infection and KSHV-induced anabolic cell proliferation and cellular transformation depend on reprogramming of cellular metabolic pathways, which provide the building blocks and energy for the growth of both the virus and the infected cells. Furthermore, KSHV dysregulates numerous metabolic sensors including mTOR, AMPK, CASTOR1 and sirtuins to maintain cellular energetic homeostasis during infection and in KSHV-induced cancers. In this review, we summarize the recent advances in the understanding of KSHV hijacking of metabolic pathways and sensors, providing insights into the molecular basis of KSHV infection and KSHV-induced oncogenesis. In addition, we highlight the critical metabolic targets and sensors for developing potential new therapies against KSHV infection and KSHV-induced cancers.
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Affiliation(s)
- Tingting Li
- Cancer Virology Program, UPMC Hillman Cancer Center, Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Shou-Jiang Gao
- Cancer Virology Program, UPMC Hillman Cancer Center, Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA.
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Gillen J, Zhu F. Disruption of the Interaction between ORF33 and the Conserved Carboxyl-Terminus of ORF45 Abolishes Progeny Virion Production of Kaposi Sarcoma-Associated Herpesvirus. Viruses 2021; 13:1828. [PMID: 34578410 PMCID: PMC8472245 DOI: 10.3390/v13091828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 12/12/2022] Open
Abstract
The Open Reading Frame 45 (ORF45) of Kaposi sarcoma-associated herpesvirus (KSHV) is a gammaherpesvirus-specific, immediate-early, tegument protein required for efficient viral replication and virion production. We have previously shown that ORF45 interacts with the conserved herpesviral protein ORF33 through the highly conserved C-terminal 19 amino acids (C19) of ORF45. Because the deletion of C19 abolished ORF33 accumulation and viral production, we reasoned that this interaction could be critical for viral production and explored as an antiviral target for gammaherpesviruses. In work described in this article, we characterize this interaction in further detail, first by revealing that this interaction is conserved among gammaherpesviruses, then by identifying residues in C19 critical for its interaction with and stabilization of ORF33. More importantly, we show that disruption of the interaction, either by mutating key residues (W403A or W405A) in C19 or by using competing cell penetration peptide TAT-C19, dramatically reduce the yield of KSHV progeny viruses. Our results not only reveal critical roles of this interaction to viral production but also provide a proof of concept for targeting the ORF33-ORF45 interaction as a novel antiviral strategy against KSHV and other gammaherpesviruses.
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Affiliation(s)
- Joseph Gillen
- Functional Cellular Networks Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA;
| | - Fanxiu Zhu
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4370, USA
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Samarina N, Ssebyatika G, Tikla T, Waldmann JY, Abere B, Nanna V, Marasco M, Carlomagno T, Krey T, Schulz TF. Recruitment of phospholipase Cγ1 to the non-structural membrane protein pK15 of Kaposi Sarcoma-associated herpesvirus promotes its Src-dependent phosphorylation. PLoS Pathog 2021; 17:e1009635. [PMID: 34143834 PMCID: PMC8244865 DOI: 10.1371/journal.ppat.1009635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 06/30/2021] [Accepted: 05/11/2021] [Indexed: 11/19/2022] Open
Abstract
Kaposi Sarcoma-associated herpesvirus (KSHV) causes three human malignancies, Kaposi Sarcoma (KS), Primary Effusion Lymphoma (PEL) and the plasma cell variant of multicentric Castleman’s Disease (MCD), as well as an inflammatory cytokine syndrome (KICS). Its non-structural membrane protein, pK15, is among a limited set of viral proteins expressed in KSHV-infected KS tumor cells. Following its phosphorylation by Src family tyrosine kinases, pK15 recruits phospholipase C gamma 1 (PLCγ1) to activate downstream signaling cascades such as the MEK/ERK, NFkB and PI3K pathway, and thereby contributes to the increased proliferation and migration as well as the spindle cell morphology of KSHV-infected endothelial cells. Here, we show that a phosphorylated Y481EEVL motif in pK15 preferentially binds into the PLCγ1 C-terminal SH2 domain (cSH2), which is involved in conformational changes occurring during the activation of PLCγ1 by receptor tyrosine kinases. We determined the crystal structure of a pK15 12mer peptide containing the phosphorylated pK15 Y481EEVL motif in complex with a shortened PLCγ1 tandem SH2 (tSH2) domain. This structure demonstrates that the pK15 peptide binds to the PLCγ1 cSH2 domain in a position that is normally occupied by the linker region connecting the PLCγ1 cSH2 and SH3 domains. We also show that longer pK15 peptides containing the phosphorylated pK15 Y481EEVL motif can increase the Src-mediated phosphorylation of the PLCγ1 tSH2 region in vitro. This pK15-induced increase in Src-mediated phosphorylation of PLCγ1 can be inhibited with the small pK15-derived peptide which occupies the PLCγ1 cSH2 domain. Our findings thus suggest that pK15 may act as a scaffold protein to promote PLCγ1 activation in a manner similar to the cellular scaffold protein SLP-76, which has been shown to promote PLCγ1 activation in the context of T-cell receptor signaling. Reminiscent of its positional homologue in Epstein-Barr Virus, LMP2A, pK15 may therefore mimic aspects of antigen-receptor signaling. Our findings also suggest that it may be possible to inhibit the recruitment and activation of PLCγ1 pharmacologically. Kaposi’s Sarcoma-Associated Herpesvirus (KSHV) causes three human malignancies (Kaposi Sarcoma, Primary Effusion Lymphoma, Multicentric Castleman’s Disease) and an inflammatory condition, KICS. One of its non-structural membrane proteins, pK15, is expressed in tumor cells and has previously been shown to contribute to its ability to reactivate from latency and to its pathogenetic properties in endothelial cells by recruiting the cellular signaling enzyme phospholipase Cγ1 (PLCγ1). Here we investigate the interaction of pK15 with PLCγ1, report the structure of a PLCγ1 domain in complex with a pK15 peptide and show that pK15 primes PLCγ1 for phosphorylation by the cellular kinase Src. We also show that the pK15-dependent activation of PLCγ1 can be inhibited with a small peptide. Our findings therefore identify the pK15-PLCγ1 interaction as a putative druggable target and provide the basis for the development of small molecule inhibitors that could perhaps serve to inhibit KSHV replication and pathogenesis.
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Affiliation(s)
- Naira Samarina
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
| | | | - Tanvi Tikla
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
| | - Ja-Yun Waldmann
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
| | - Bizunesh Abere
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
| | - Vittoria Nanna
- Institute of Organic Chemistry, Leibniz University Hannover, Hannover, Germany
| | | | - Teresa Carlomagno
- Institute of Organic Chemistry, Leibniz University Hannover, Hannover, Germany
| | - Thomas Krey
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
- Excellence Cluster 2155 RESIST, Hannover Medical School, Hannover, Germany
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
| | - Thomas F. Schulz
- Institute of Virology, Hannover Medical School, Hannover, Germany
- German Center for Infection Research, Hannover Braunschweig Site, Hannover, Germany
- Excellence Cluster 2155 RESIST, Hannover Medical School, Hannover, Germany
- * E-mail:
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Bone Marrow-Derived SH-SY5Y Neuroblastoma Cells Infected with Kaposi's Sarcoma-Associated Herpesvirus Display Unique Infection Phenotypes and Growth Properties. J Virol 2021; 95:e0000321. [PMID: 33853962 DOI: 10.1128/jvi.00003-21] [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] [Indexed: 12/30/2022] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is an important oncogenic virus previously shown to be neurotropic, but studies on neuronal cell infection and pathogenesis are still very limited. Here, we characterized the effects of KSHV infection on neuronal SH-SY5Y cells by the recombinant virus rKSHV.219, which expresses both green fluorescent protein (GFP) and red fluorescent protein (RFP) to reflect the latent and lytic phases of infection. We demonstrated that infected cells have a higher growth rate and that KSHV infection can be sustained. Interestingly, the infected cells can transition spontaneously back and forth between lytic and latent phases of infection, producing progeny viruses but without any adverse effects on cell growth. In addition, transcriptome analysis of viral and cellular genes in latent and lytic cells showed that unlike other infected cell lines, the latently infected cells expressed both latent and most, but not all, of the lytic genes required for infectious virion production. The viral genes uniquely expressed by the lytic cells were mainly involved in the early steps of virus binding. Some of the cellular genes that were deregulated in both latently and lytically infected cells are involved in cell adhesion, cell signal pathways, and tumorigenesis. The downregulated cellular CCDN1, PAX5, and NFASC and upregulated CTGF, BMP4, YAP1, LEF1, and HLA-DRB1 genes were found to be associated with cell adhesion molecules (CAMs), hippo signaling, and cancer. These deregulated genes may be involved in creating an environment that is unique in neuronal cells to sustain cell growth upon KSHV infection and not observed in other infected cell types. IMPORTANCE Our study has provided evidence that neuronal SH-SY5Y cells displayed unique cellular responses upon KSHV infection. Unlike other infected cells, this neuronal cell line displayed a higher growth rate upon infection and can spontaneously transition back and forth between latent and lytic phases of infection. Unlike other latently infected cells, a number of lytic genes were also expressed in the latent phase of infection in addition to the established latent viral genes. They may play a role in deregulating a number of host genes that are involved in cell signaling and tumorigenesis in order to sustain the infection and growth advantages for the cells. Our study has provided novel insights into KSHV infection of neuronal cells and a potential new model for further studies to explore the underlying mechanism in viral and host interactions for neuronal cells and the association of KSHV with neuronal diseases.
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Viral Manipulation of the Host Epigenome as a Driver of Virus-Induced Oncogenesis. Microorganisms 2021; 9:microorganisms9061179. [PMID: 34070716 PMCID: PMC8227491 DOI: 10.3390/microorganisms9061179] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 12/13/2022] Open
Abstract
Tumorigenesis due to viral infection accounts for a high fraction of the total global cancer burden (15–20%) of all human cancers. A comprehensive understanding of the mechanisms by which viral infection leads to tumor development is extremely important. One of the main mechanisms by which viruses induce host cell proliferation programs is through controlling the host’s epigenetic machinery. In this review, we dissect the epigenetic pathways through which oncogenic viruses can integrate their genome into host cell chromosomes and lead to tumor progression. In addition, we highlight the potential use of drugs based on histone modifiers in reducing the global impact of cancer development due to viral infection.
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Dzobo K. The Role of Viruses in Carcinogenesis and Molecular Targeting: From Infection to Being a Component of the Tumor Microenvironment. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2021; 25:358-371. [PMID: 34037476 DOI: 10.1089/omi.2021.0052] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
About a tenth of all cancers are caused by viruses or associated with viral infection. Recent global events including the coronavirus disease-2019 (COVID-19) pandemic means that human encounter with viruses is increased. Cancer development in individuals with viral infection can take many years after infection, demonstrating that the involvement of viruses in cancer development is a long and complex process. This complexity emanates from individual genetic heterogeneity and the many steps involved in cancer development owing to viruses. The process of tumorigenesis is driven by the complex interaction between several viral factors and host factors leading to the creation of a tumor microenvironment (TME) that is ideal and promotes tumor formation. Viruses associated with human cancers ensure their survival and proliferation through activation of several cellular processes including inflammation, migration, and invasion, resistance to apoptosis and growth suppressors. In addition, most human oncoviruses evade immune detection and can activate signaling cascades including the PI3K-Akt-mTOR, Notch and Wnt pathways associated with enhanced proliferation and angiogenesis. This expert review examines and synthesizes the multiple biological factors related to oncoviruses, and the signaling cascades activated by these viruses contributing to viral oncogenesis. In particular, I examine and review the Epstein-Barr virus, human papillomaviruses, and Kaposi's sarcoma herpes virus in a context of cancer pathogenesis. I conclude with a future outlook on therapeutic targeting of the viruses and their associated oncogenic pathways within the TME. These anticancer strategies can be in the form of, but not limited to, antibodies and inhibitors.
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Affiliation(s)
- Kevin Dzobo
- International Centre for Genetic Engineering and Biotechnology (ICGEB), Cape Town Component, Cape Town, South Africa.,Division of Medical Biochemistry and Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
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Nehme Z, Pasquereau S, Haidar Ahmad S, Coaquette A, Molimard C, Monnien F, Algros MP, Adotevi O, Diab Assaf M, Feugeas JP, Herbein G. Polyploid giant cancer cells, stemness and epithelial-mesenchymal plasticity elicited by human cytomegalovirus. Oncogene 2021; 40:3030-3046. [PMID: 33767437 DOI: 10.1038/s41388-021-01715-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/05/2021] [Accepted: 02/11/2021] [Indexed: 12/24/2022]
Abstract
A growing body of evidence is recognizing human cytomegalovirus (HCMV) as a potential oncogenic virus. We hereby provide the first experimental in vitro evidence for HCMV as a reprogramming vector, through the induction of dedifferentiation of mature human mammary epithelial cells (HMECs), generation of a polyploid giant cancer cell (PGCC) phenotype characterized by sustained growth of blastomere-like cells, in concordance with the acquisition of embryonic stem cells characteristics and epithelial-mesenchymal plasticity. HCMV presence parallels the succession of the observed cellular and molecular events potentially ensuing the transformation process. Correlation between PGCCs detection and HCMV presence in breast cancer tissue further validates our hypothesis in vivo. Our study indicates that some clinical HCMV strains conserve the potential to transform HMECs and fit with a "blastomere-like" model of oncogenesis, which may be relevant in the pathophysiology of breast cancer and other adenocarcinoma, especially of poor prognosis.
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Affiliation(s)
- Zeina Nehme
- Department Pathogens & Inflammation-EPILAB EA4266, University of Bourgogne France-Comté, Besançon, France
- Lebanese University, Beyrouth, Lebanon
| | - Sébastien Pasquereau
- Department Pathogens & Inflammation-EPILAB EA4266, University of Bourgogne France-Comté, Besançon, France
| | - Sandy Haidar Ahmad
- Department Pathogens & Inflammation-EPILAB EA4266, University of Bourgogne France-Comté, Besançon, France
- Lebanese University, Beyrouth, Lebanon
| | | | - Chloé Molimard
- Department of Pathology, CHRU Besançon, Besançon, France
| | - Franck Monnien
- Department of Pathology, CHRU Besançon, Besançon, France
| | | | - Olivier Adotevi
- INSERM, EFS BFC, UMR1098, RIGHT, University of Bourgogne Franche-Comté, Interactions Greffon-Hôte-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France
| | | | - Jean-Paul Feugeas
- INSERM, EFS BFC, UMR1098, RIGHT, University of Bourgogne Franche-Comté, Interactions Greffon-Hôte-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France
| | - Georges Herbein
- Department Pathogens & Inflammation-EPILAB EA4266, University of Bourgogne France-Comté, Besançon, France.
- Department of Virology, CHRU Besançon, Besançon, France.
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Integrated analysis identifies oxidative stress genes associated with progression and prognosis in gastric cancer. Sci Rep 2021; 11:3292. [PMID: 33558567 PMCID: PMC7870842 DOI: 10.1038/s41598-021-82976-w] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/27/2021] [Indexed: 12/25/2022] Open
Abstract
Oxidative stress (OS) reactions are reported to be associated with oncogenesis and tumor progression. However, little is known about the potential diagnostic value of OS in gastric cancer (GC). This study identified hub OS genes associated with the prognosis and progression of GC and illustrated the underlying mechanisms. The transcriptome data and corresponding GC clinical information were collected from The Cancer Genome Atlas (TCGA) database. Aberrantly expressed OS genes between tumors and adjacent normal tissues were screened, and 11 prognosis-associated genes were identified with a series of bioinformatic analyses and used to construct a prognostic model. These genes were validated in the Gene Expression Omnibus (GEO) database. Furthermore, weighted gene co-expression network analysis (WGCNA) was subsequently conducted to identify the most significant hub genes for the prediction of GC progression. Analysis revealed that a good prognostic model was constructed with a better diagnostic accuracy than other clinicopathological characteristics in both TCGA and GEO cohorts. The model was also significantly associated with the overall survival of patients with GC. Meanwhile, a nomogram based on the risk score was established, which displayed a favorable discriminating ability for GC. In the WGCNA analysis, 13 progression-associated hub OS genes were identified that were also significantly associated with the progression of GC. Furthermore, functional and gene ontology (GO) analyses were performed to reveal potential pathways enriched with these genes. These results provide novel insights into the potential applications of OS-associated genes in patients with GC.
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Guan C, Shi Y, Liu J, Yang Y, Zhang Q, Lu Z, Zheng G, Ye W, Xue M, Zhou X, Zhang N, Li H, Xie R, Chen B, Lu P. Pulmonary involvement in acquired immunodeficiency syndrome-associated Kaposi's sarcoma: a descriptive analysis of thin-section manifestations in 29 patients. Quant Imaging Med Surg 2021; 11:714-724. [PMID: 33532271 DOI: 10.21037/qims-20-284] [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] [Indexed: 12/12/2022]
Abstract
Background Acquired immunodeficiency syndrome-associated Kaposi's sarcoma (AIDS-KS) was the first malignant neoplasm to be described as being related to AIDS. The lungs are the most common visceral site of AIDS-KS. This study aimed to analyze the computed tomography (CT) manifestations of pulmonary involvement in AIDS-KS. Methods Twenty-nine male patients were enrolled in this retrospective study. Imaging evaluation parameters included lesion distribution, the flame sign, interlobular septal thickening, peribronchovascular interstitium thickening, ground-glass opacity (GGO), dilated blood vessels in lesions, and pleural effusion. Results A peribronchovascular distribution was observed in all patients, predominantly in the lower lobes. Of the patients, 58.62% (17/29) exhibited the flame sign, 75.86% (22/29) had interlobular septal thickening, 72.41% (21/29) had peribronchovascular interstitium thickening, 82.76% (24/29) had GGO, and 34.48% (10/29) had pleural effusion. Enlarged lymph nodes with a short-axis diameter >1.0 cm were found in 41.38% (12/29) of the patients. Of the 12 patients who underwent contrast-enhanced CT (CECT), 90.91% (11/12) had dilated blood vessels, and nodules, consolidations, and lymph nodes were observed to be strongly enhanced. Intrapulmonary lesions decreased in size or number after appropriate treatment during follow-up. Conclusions Common CT manifestations of pulmonary AIDS-KS include the flame sign, peribronchovascular distribution, peribronchovascular interstitium thickening, interlobular septa thickening, GGO, dilated blood vessel, and strong enhancement of nodules, consolidations, and lymph nodes. It is helpful to follow up the therapeutic effect of pulmonary AIDS-KS by chest CT.
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Affiliation(s)
- Chunshuang Guan
- Department of Radiology, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Yuxin Shi
- Department of Radiology, Shanghai Public Health Clinical Center, Shanghai, China
| | - Jinxin Liu
- Department of Radiology, Guangzhou Eighth People's Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yuxin Yang
- Department of Radiology, The Sixth People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Qianqian Zhang
- Department of Radiology, Zhoukou Central Hospital, Zhoukou, China
| | - Zhiyan Lu
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Guangping Zheng
- Department of Radiology, The Shenzhen No. 3 People's Hospital, Guangdong Medical College, Shenzhen, China
| | - Wen Ye
- Department of Radiology, Shanghai Public Health Clinical Center, Shanghai, China
| | - Ming Xue
- Department of Radiology, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Xingang Zhou
- Department of Pathology, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Na Zhang
- Department of Radiology, Chengdu Public Health Clinical Center, Chengdu, China
| | - Hongjun Li
- Department of Radiology, Beijing You'an Hospital, Capital Medical University, Beijing, China
| | - Ruming Xie
- Department of Radiology, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Budong Chen
- Department of Radiology, Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - Puxuan Lu
- Department of Radiology, Shenzhen Center for Chronic Disease Control, Shenzhen, China
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Kim YJ, Kim Y, Kumar A, Kim CW, Toth Z, Cho NH, Lee HR. Kaposi's sarcoma-associated herpesvirus latency-associated nuclear antigen dysregulates expression of MCL-1 by targeting FBW7. PLoS Pathog 2021; 17:e1009179. [PMID: 33471866 PMCID: PMC7816990 DOI: 10.1371/journal.ppat.1009179] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 11/22/2020] [Indexed: 12/11/2022] Open
Abstract
Primary effusion lymphoma (PEL) is an aggressive B cell lymphoma that is etiologically linked to Kaposi’s sarcoma-associated herpesvirus (KSHV). Despite standard multi-chemotherapy treatment, PEL continues to cause high mortality. Thus, new strategies to control PEL are needed urgently. Here, we show that a phosphodegron motif within the KSHV protein, latency-associated nuclear antigen (LANA), specifically interacts with E3 ubiquitin ligase FBW7, thereby competitively inhibiting the binding of the anti-apoptotic protein MCL-1 to FBW7. Consequently, LANA-FBW7 interaction enhances the stability of MCL-1 by preventing its proteasome-mediated degradation, which inhibits caspase-3-mediated apoptosis in PEL cells. Importantly, MCL-1 inhibitors markedly suppress colony formation on soft agar and tumor growth of KSHV+PEL/BCBL-1 in a xenograft mouse model. These results strongly support the conclusion that high levels of MCL-1 expression enable the oncogenesis of PEL cells and thus, MCL-1 could be a potential drug target for KSHV-associated PEL. This work also unravels a mechanism by which an oncogenic virus perturbs a key component of the ubiquitination pathway to induce tumorigenesis. Primary effusion lymphoma (PEL), a highly aggressive B cell lymphoma, is associated with Kaposi’s sarcoma-associated herpesvirus (KSHV). However, the underlying mechanisms that govern the aggressiveness of KSHV-associated PEL are poorly understood. Here, we demonstrate that KSHV LANA interacts with cellular ubiquitin E3 ligase FBW7, sequestering MCL-1 from FBW7, which reduces MCL-1 ubiquitination. As such, LANA potently stabilizes and increases MCL-1 protein, leading to inhibition of caspase-3-mediated apoptosis in PEL cells. Furthermore, MCL-1 inhibitors efficiently blocked PEL progression in mouse xenograft model. These results suggest that LANA acts as a proto-oncogene via deregulating tumor suppressor FBW7, which upregulates anti-apoptotic MCL-1 expression. This study suggests drugs that target MCL-1 may serve as an effective therapy against KSHV+ PEL.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antigens, Viral/genetics
- Antigens, Viral/metabolism
- Apoptosis
- Cell Proliferation
- F-Box-WD Repeat-Containing Protein 7/genetics
- F-Box-WD Repeat-Containing Protein 7/metabolism
- Female
- Herpesvirus 8, Human/physiology
- Humans
- Lymphoma, Primary Effusion/genetics
- Lymphoma, Primary Effusion/metabolism
- Lymphoma, Primary Effusion/pathology
- Lymphoma, Primary Effusion/virology
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Myeloid Cell Leukemia Sequence 1 Protein/genetics
- Myeloid Cell Leukemia Sequence 1 Protein/metabolism
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- Phosphorylation
- Sarcoma, Kaposi/genetics
- Sarcoma, Kaposi/metabolism
- Sarcoma, Kaposi/pathology
- Sarcoma, Kaposi/virology
- Tumor Cells, Cultured
- Ubiquitination
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Yeong Jun Kim
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong, South Korea
| | - Yuri Kim
- Department of Microbiology and Immunology, Seoul National University college of Medicine, Seoul, South Korea
| | - Abhishek Kumar
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, United States of America
| | - Chan Woo Kim
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong, South Korea
| | - Zsolt Toth
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, United States of America
| | - Nam Hyuk Cho
- Department of Microbiology and Immunology, Seoul National University college of Medicine, Seoul, South Korea
- Department of Biomedical Sciences, Seoul National University college of Medicine, Seoul, South Korea
| | - Hye-Ra Lee
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong, South Korea
- Department of Lab Medicine, College of Medicine, Korea University, Seoul, South Korea
- * E-mail:
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49
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Cellular Receptors Involved in KSHV Infection. Viruses 2021; 13:v13010118. [PMID: 33477296 PMCID: PMC7829929 DOI: 10.3390/v13010118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 01/08/2021] [Accepted: 01/13/2021] [Indexed: 12/13/2022] Open
Abstract
The process of Kaposi’s Sarcoma Herpes Virus’ (KSHV) entry into target cells is complex and engages several viral glycoproteins which bind to a large range of host cell surface molecules. Receptors for KSHV include heparan sulphate proteoglycans (HSPGs), several integrins and Eph receptors, cystine/glutamate antiporter (xCT) and Dendritic Cell-Specific Intercellular adhesion molecule-3-grabbing non-integrin (DC-SIGN). This diverse range of potential binding and entry sites allows KSHV to have a broad cell tropism, and entry into specific cells is dependent on the available receptor repertoire. Several molecules involved in KSHV entry have been well characterized, particularly those postulated to be associated with KSHV-associated pathologies such as Kaposi’s Sarcoma (KS). In this review, KSHV infection of specific cell types pertinent to its pathogenesis will be comprehensively summarized with a focus on the specific cell surface binding and entry receptors KSHV exploits to gain access to a variety of cell types. Gaps in the current literature regarding understanding interactions between KSHV glycoproteins and cellular receptors in virus infection are identified which will lead to the development of virus infection intervention strategies.
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50
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Liu W, Zhang Y, Luo B. Long Non-coding RNAs in Gammaherpesvirus Infections: Their Roles in Tumorigenic Mechanisms. Front Microbiol 2021; 11:604536. [PMID: 33519750 PMCID: PMC7843584 DOI: 10.3389/fmicb.2020.604536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 12/10/2020] [Indexed: 12/12/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) regulate gene expression at the epigenetic, transcriptional, or posttranscriptional level by interacting with protein, DNA, and RNA. Emerging evidence suggests that various lncRNAs are abnormally expressed and play indispensable roles in virus-triggered cancers. Besides, a growing number of studies have shown that virus-encoded lncRNAs participate in tumorigenesis. However, the functions of most lncRNAs in tumors caused by oncogenic viruses and their underlying mechanisms remain largely unknown. In this review, we summarize current findings regarding lncRNAs involved in cancers caused by Epstein–Barr virus (EBV) and Kaposi’s sarcoma herpesvirus (KSHV). Additionally, we discuss the contribution of lncRNAs to tumor occurrence, development, invasion, and metastasis; the roles of lncRNAs in key signaling pathways and their potential as biomarkers and therapeutic targets for tumor diagnostics and treatment.
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Affiliation(s)
- Wen Liu
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, China
| | - Yan Zhang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, China.,Department of Clinical Laboratory, Zibo Central Hospital, Zibo, China
| | - Bing Luo
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, Qingdao, China
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