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Caro-Vegas C, Sellers S, Host KM, Seltzer J, Landis J, Fischer WA, Damania B, Dittmer DP. Runaway Kaposi Sarcoma-associated herpesvirus replication correlates with systemic IL-10 levels. Virology 2020; 539:18-25. [PMID: 31629226 PMCID: PMC6908428 DOI: 10.1016/j.virol.2019.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 09/11/2019] [Accepted: 10/01/2019] [Indexed: 12/25/2022]
Abstract
KSHV-associated inflammatory cytokine syndrome (KICS) is caused by Kaposi's sarcoma-associated herpesvirus (KSHV). KICS is associated with high-level, systemic replication of KSHV. This study characterized the clinical and virologic features of a KICS patient over time. Additionally, it compared the cytokine profiles of the KICS case to Kaposi's sarcoma (KS) (n = 11) and non-KS (n = 6) cases. This KICS case presented with elevated levels of KSHV and IL-10, as expected. Surprisingly, this case did not have elevated levels of IL-6 or human immunodeficiency virus 1 (HIV-1). Nevertheless, treatment with anti-IL6 receptor antibody (tocilizumab) reduced KSHV viral load and IL-10. The KSHV genome sequence showed no significant changes over time, except in ORF24. Phylogenetic analysis established this isolate as belonging to KSHV clade A and closely related to other US isolates. These findings suggest IL-10 as potential biomarker and therapy target for KICS.
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MESH Headings
- AIDS-Related Opportunistic Infections/drug therapy
- AIDS-Related Opportunistic Infections/immunology
- AIDS-Related Opportunistic Infections/virology
- Adult
- Antibodies, Monoclonal, Humanized/therapeutic use
- Biomarkers/blood
- Cytokine Release Syndrome
- DNA, Viral/blood
- DNA, Viral/genetics
- Genome, Viral/genetics
- Herpesviridae Infections/diagnosis
- Herpesviridae Infections/drug therapy
- Herpesviridae Infections/immunology
- Herpesviridae Infections/virology
- Herpesvirus 8, Human/classification
- Herpesvirus 8, Human/genetics
- Herpesvirus 8, Human/isolation & purification
- Herpesvirus 8, Human/physiology
- Humans
- Interleukin-10/blood
- Interleukin-6/blood
- Male
- Middle Aged
- Phylogeny
- Sarcoma, Kaposi/immunology
- Sarcoma, Kaposi/virology
- Viral Load
- Virus Replication/immunology
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Affiliation(s)
- Carolina Caro-Vegas
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA
| | - Subhashini Sellers
- Division of Pulmonary Diseases and Critical Care Medicine, School of Medicine, The University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, 27599, USA
| | - Kurtis M Host
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA
| | - Jedediah Seltzer
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA
| | - Justin Landis
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA
| | - William A Fischer
- Division of Pulmonary Diseases and Critical Care Medicine, School of Medicine, The University of North Carolina at Chapel Hill, 130 Mason Farm Road, Chapel Hill, NC, 27599, USA
| | - Blossom Damania
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA
| | - Dirk P Dittmer
- UNC Lineberger Comprehensive Cancer Center and Department of Microbiology and Immunology, School of Medicine, The University of North Carolina at Chapel Hill, 450 West Drive, Chapel Hill, NC, 27599, USA.
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McNamara RP, Chugh PE, Bailey A, Costantini LM, Ma Z, Bigi R, Cheves A, Eason AB, Landis JT, Host KM, Xiong J, Griffith JD, Damania B, Dittmer DP. Extracellular vesicles from Kaposi Sarcoma-associated herpesvirus lymphoma induce long-term endothelial cell reprogramming. PLoS Pathog 2019; 15:e1007536. [PMID: 30716130 PMCID: PMC6361468 DOI: 10.1371/journal.ppat.1007536] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 12/17/2018] [Indexed: 01/08/2023] Open
Abstract
Extracellular signaling is a mechanism that higher eukaryotes have evolved to facilitate organismal homeostasis. Recent years have seen an emerging interest in the role of secreted microvesicles, termed extracellular vesicles (EV) or exosomes in this signaling network. EV contents can be modified by the cell in response to stimuli, allowing them to relay information to neighboring cells, influencing their physiology. Here we show that the tumor virus Kaposi's Sarcoma-associated herpesvirus (KSHV) hijacks this signaling pathway to induce cell proliferation, migration, and transcriptome reprogramming in cells not infected with the virus. KSHV-EV activates the canonical MEK/ERK pathway, while not alerting innate immune regulators, allowing the virus to exert these changes without cellular pathogen recognition. Collectively, we propose that KSHV establishes a niche favorable for viral spread and cell transformation through cell-derived vesicles, all while avoiding detection.
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Affiliation(s)
- Ryan P McNamara
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Pauline E Chugh
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
- Q2 Solutions-EA Genomics, Morrisville, North Carolina
| | - Aubrey Bailey
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Lindsey M Costantini
- Department of Biological and Biomedical Sciences, North Carolina Central University, Durham, North Carolina
| | - Zhe Ma
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Rachele Bigi
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Avery Cheves
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Anthony B Eason
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Justin T Landis
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kurtis M Host
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jie Xiong
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jack D Griffith
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Blossom Damania
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Dirk P Dittmer
- Department of Microbiology and Immunology, Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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Zhang Y, Dittmer DP, Mieczkowski PA, Host KM, Fusco WG, Duncan JA, Damania B. RIG-I Detects Kaposi's Sarcoma-Associated Herpesvirus Transcripts in a RNA Polymerase III-Independent Manner. mBio 2018; 9:e00823-18. [PMID: 29970461 PMCID: PMC6030556 DOI: 10.1128/mbio.00823-18] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/04/2018] [Indexed: 12/24/2022] Open
Abstract
Retinoic acid-inducible gene I (RIG-I) is a cytosolic pathogen recognition receptor that initiates the innate immune response against many RNA viruses. We previously showed that RIG-I restricts Kaposi's sarcoma-associated herpesvirus (KSHV) reactivation (J. A. West et al., J Virol 88:5778-5787, 2014, https://doi.org/10.1128/JVI.03226-13). In this study, we report that KSHV stimulates the RIG-I signaling pathway in a RNA polymerase (Pol) III-independent manner and subsequently induces type I interferon (IFN) responses. Knockdown or inhibition of RNA Pol III had no effect on beta interferon (IFN-β) induction by KSHV. By using high-throughput sequencing of RNA isolated by cross-linking immunoprecipitation (HITS-CLIP) approach, we identified multiple KSHV regions that give rise to RNA fragments binding to RIG-I, such as ORF810420-10496, Repeat region (LIR1)119059-119204, and ORF2543561-43650 The sequence dissimilarity between these fragments suggests that RIG-I detects a particular structure rather than a specific sequence motif. Synthesized ORF810420-10496 RNA stimulated RIG-I-dependent but RNA Pol III-independent IFN-β signaling. In summary, several KSHV RNAs are sensed by RIG-I in a RNA Pol III-independent manner.IMPORTANCE Kaposi's sarcoma-associated herpesvirus (KSHV) is the causative agent of Kaposi's sarcoma, primary effusion lymphoma, and multicentric Castleman's disease. Innate immune responses against viral infections, especially the induction of type I interferon, are critical for limiting the replication of viruses. Retinoic acid-inducible gene I (RIG-I), a cytosolic RNA helicase sensor, plays a significant role in the induction of type I interferon responses following viral infection. Here, we identified multiple RNA regions in KSHV as potential virus ligands that bind to RIG-I and stimulate RIG-I-dependent but RNA Pol III-independent IFN-β signaling. Our results expand the role of RIG-I by providing an example of a DNA virus activating a canonical RNA-sensing pathway.
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Affiliation(s)
- Yugen Zhang
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Dirk P Dittmer
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Piotr A Mieczkowski
- High Throughput Sequencing Facility, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Kurtis M Host
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - William G Fusco
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Joseph A Duncan
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Blossom Damania
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Bhatt AP, Wong JP, Weinberg MS, Host KM, Giffin LC, Buijnink J, van Dijk E, Izumiya Y, Kung HJ, Temple BRS, Damania B. A viral kinase mimics S6 kinase to enhance cell proliferation. Proc Natl Acad Sci U S A 2016; 113:7876-81. [PMID: 27342859 PMCID: PMC4948314 DOI: 10.1073/pnas.1600587113] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Viruses depend upon the host cell for manufacturing components of progeny virions. To mitigate the inextricable dependence on host cell protein synthesis, viruses can modulate protein synthesis through a variety of mechanisms. We report that the viral protein kinase (vPK) encoded by open reading frame 36 (ORF36) of Kaposi's sarcoma-associated herpesvirus (KSHV) enhances protein synthesis by mimicking the function of the cellular protein S6 kinase (S6KB1). Similar to S6KB1, vPK phosphorylates the ribosomal S6 protein and up-regulates global protein synthesis. vPK also augments cellular proliferation and anchorage-independent growth. Furthermore, we report that both vPK and S6KB1 phosphorylate the enzyme 6-phosphofructo-2-kinase/fructose-2, 6-bisphosphatase 2 (PFKFB2) and that both kinases promote endothelial capillary tubule formation.
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Affiliation(s)
- Aadra Prashant Bhatt
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Jason P Wong
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Marc S Weinberg
- Gene Therapy Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Kurtis M Host
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Louise C Giffin
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | | | | | - Yoshihiro Izumiya
- Department of Dermatology, University of California Davis School of Medicine, Sacramento, CA 95817; Department of Biochemistry and Molecular Medicine, University of California Davis School of Medicine, Sacramento, CA 95817; University of California Davis Comprehensive Cancer Center, Sacramento, CA 95817
| | - Hsing-Jien Kung
- Department of Biochemistry and Molecular Medicine, University of California Davis School of Medicine, Sacramento, CA 95817; University of California Davis Comprehensive Cancer Center, Sacramento, CA 95817
| | - Brenda R S Temple
- Department of Biochemistry and Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; R. L. Juliano Structural Bioinformatics Core Facility, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Center for Structural Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Blossom Damania
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599;
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West JA, Wicks M, Gregory SM, Chugh P, Jacobs SR, Zhang Z, Host KM, Dittmer DP, Damania B. An important role for mitochondrial antiviral signaling protein in the Kaposi's sarcoma-associated herpesvirus life cycle. J Virol 2014; 88:5778-87. [PMID: 24623417 PMCID: PMC4019080 DOI: 10.1128/jvi.03226-13] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 03/04/2014] [Indexed: 12/25/2022] Open
Abstract
UNLABELLED Kaposi's sarcoma-associated herpesvirus (KSHV) has been shown to be recognized by two families of pattern recognition receptors (PRRs), Toll-like receptors (TLRs) and NOD-like receptors (NLRs). Here we show that MAVS and RIG-I (retinoic acid-inducible gene 1), an RLR family member, also have a role in suppressing KSHV replication and production. In the context of primary infection, we show that in cells with depleted levels of MAVS or RIG-I, KSHV transcription is increased, while beta interferon (IFN-β) induction is attenuated. We also observed that MAVS and RIG-I are critical during the process of reactivation. Depletion of MAVS and RIG-I prior to reactivation led to increased viral load and production of infectious virus. Finally, MAVS depletion in latent KSHV-infected B cells leads to increased viral gene transcription. Overall, this study suggests a role for MAVS and RIG-I signaling during different stages of the KSHV life cycle. IMPORTANCE We show that RIG-I and its adaptor protein, MAVS, can sense KSHV infection and that these proteins can suppress KSHV replication following primary infection and/or viral reactivation.
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Affiliation(s)
- John A West
- Lineberger Comprehensive Cancer Center, Program in Global Oncology, and Department of Microbiology & Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Limoli DH, Rockel AB, Host KM, Jha A, Kopp BT, Hollis T, Wozniak DJ. Cationic antimicrobial peptides promote microbial mutagenesis and pathoadaptation in chronic infections. PLoS Pathog 2014; 10:e1004083. [PMID: 24763694 PMCID: PMC3999168 DOI: 10.1371/journal.ppat.1004083] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 03/09/2014] [Indexed: 12/30/2022] Open
Abstract
Acquisition of adaptive mutations is essential for microbial persistence during chronic infections. This is particularly evident during chronic Pseudomonas aeruginosa lung infections in cystic fibrosis (CF) patients. Thus far, mutagenesis has been attributed to the generation of reactive species by polymorphonucleocytes (PMN) and antibiotic treatment. However, our current studies of mutagenesis leading to P. aeruginosa mucoid conversion have revealed a potential new mutagen. Our findings confirmed the current view that reactive oxygen species can promote mucoidy in vitro, but revealed PMNs are proficient at inducing mucoid conversion in the absence of an oxidative burst. This led to the discovery that cationic antimicrobial peptides can be mutagenic and promote mucoidy. Of specific interest was the human cathelicidin LL-37, canonically known to disrupt bacterial membranes leading to cell death. An alternative role was revealed at sub-inhibitory concentrations, where LL-37 was found to induce mutations within the mucA gene encoding a negative regulator of mucoidy and to promote rifampin resistance in both P. aeruginosa and Escherichia coli. The mechanism of mutagenesis was found to be dependent upon sub-inhibitory concentrations of LL-37 entering the bacterial cytosol and binding to DNA. LL-37/DNA interactions then promote translesion DNA synthesis by the polymerase DinB, whose error-prone replication potentiates the mutations. A model of LL-37 bound to DNA was generated, which reveals amino termini α-helices of dimerized LL-37 bind the major groove of DNA, with numerous DNA contacts made by LL-37 basic residues. This demonstrates a mutagenic role for antimicrobials previously thought to be insusceptible to resistance by mutation, highlighting a need to further investigate their role in evolution and pathoadaptation in chronic infections. Antimicrobial peptides (AMPs) are produced by the mammalian immune system to fight invading pathogens. The best understood function of AMPs is to interact with the membranes of microbes, thereby disrupting and killing cells. However, the amount of AMP available during chronic bacterial infections may not be sufficient to kill pathogens (sub-inhibitory). In this study, we found that at sub-inhibitory levels, AMPs promote mutations in bacterial DNA, a function not previously attributed to them. In particular, we found that in the bacteria Pseudomonas aeruginosa, one AMP called LL-37 can promote mutations, which enable the bacteria to overproduce a protective sugar coating, a process called mucoid conversion. P. aeruginosa mucoid conversion is a major risk factor for those suffering from cystic fibrosis (CF), the most common lethal, heritable disease in the US. We found that LL-37 is able to produce these mutations by penetrating the bacterial cell and binding to the bacterial DNA. DNA binding disrupts normal DNA replication and allows mutations to occur. Furthermore, we observed LL-37 induced mutagenesis in processes apart from mucoid conversion, in both P. aeruginosa and E. coli. This suggests that AMP-induced mutagenesis may be important for a broad range of chronic diseases and pathogens.
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Affiliation(s)
- Dominique H. Limoli
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
| | - Andrea B. Rockel
- Department of Natural Sciences, Mars Hill University, Mars Hill, North Carolina, United States of America
| | - Kurtis M. Host
- Medicine Administration, University of North Carolina Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Anuvrat Jha
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
| | - Benjamin T. Kopp
- Department of Pediatrics, The Ohio State University, Columbus, Ohio, United States of America
| | - Thomas Hollis
- Department of Biochemistry and Center for Structural Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Daniel J. Wozniak
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail:
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