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Kirk A, Graham SV. The human papillomavirus late life cycle and links to keratinocyte differentiation. J Med Virol 2024; 96:e29461. [PMID: 38345171 DOI: 10.1002/jmv.29461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/21/2023] [Accepted: 01/25/2024] [Indexed: 02/15/2024]
Abstract
Regulation of human papillomavirus (HPV) gene expression is tightly linked to differentiation of the keratinocytes the virus infects. HPV late gene expression is confined to the cells in the upper layers of the epithelium where the virus capsid proteins are synthesized. As these proteins are highly immunogenic, and the upper epithelium is an immune-privileged site, this spatial restriction aids immune evasion. Many decades of work have contributed to the current understanding of how this restriction occurs at a molecular level. This review will examine what is known about late gene expression in HPV-infected lesions and will dissect the intricacies of late gene regulation. Future directions for novel antiviral approaches will be highlighted.
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Affiliation(s)
- Anna Kirk
- Centre for Virus Research, University of Glasgow, Glasgow, UK
| | - Sheila V Graham
- Centre for Virus Research, University of Glasgow, Glasgow, UK
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2
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Modelling Chlamydia and HPV co-infection in patient-derived ectocervix organoids reveals distinct cellular reprogramming. Nat Commun 2022; 13:1030. [PMID: 35210413 PMCID: PMC8873204 DOI: 10.1038/s41467-022-28569-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 01/20/2022] [Indexed: 01/03/2023] Open
Abstract
Coinfections with pathogenic microbes continually confront cervical mucosa, yet their implications in pathogenesis remain unclear. Lack of in-vitro models recapitulating cervical epithelium has been a bottleneck to study coinfections. Using patient-derived ectocervical organoids, we systematically modeled individual and coinfection dynamics of Human papillomavirus (HPV)16 E6E7 and Chlamydia, associated with carcinogenesis. The ectocervical stem cells were genetically manipulated to introduce E6E7 oncogenes to mimic HPV16 integration. Organoids from these stem cells develop the characteristics of precancerous lesions while retaining the self-renewal capacity and organize into mature stratified epithelium similar to healthy organoids. HPV16 E6E7 interferes with Chlamydia development and induces persistence. Unique transcriptional and post-translational responses induced by Chlamydia and HPV lead to distinct reprogramming of host cell processes. Strikingly, Chlamydia impedes HPV-induced mechanisms that maintain cellular and genome integrity, including mismatch repair in the stem cells. Together, our study employing organoids demonstrates the hazard of multiple infections and the unique cellular microenvironment they create, potentially contributing to neoplastic progression. Here, Koster et al., model human papillomavirus and Chlamydia coinfection dynamics in patient-derived ectocervical organoids, and characterize the effects of multiple infections in the cellular microenvironment, potentially contributing to neoplasia.
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The impact of HPV infection on human glycogen and lipid metabolism - a review. Biochim Biophys Acta Rev Cancer 2021; 1877:188646. [PMID: 34763025 DOI: 10.1016/j.bbcan.2021.188646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 12/12/2022]
Abstract
Reinterpretation of the Wartburg effect leads to understanding aerobic glycolysis as a process that provides considerable amount of molecular precursors for the production of lipids, nucleotides and amino acids that are necessary for continuous growth and rapid proliferation characteristic for cancer cells. Human papilloma virus (HPV) is a number one cause of cervical carcinoma with 99% of the cervical cancer patients being HPV positive. This tight link between HPV and cancer raises the question if and how HPV impact cells to reprogram their metabolism? Focusing on early phase proteins E1, E2, E5, E6 and E7 we demonstrate that HPV activates plethora of metabolic pathways and directly influences enzymes of the glycolysis pathway to promote the Warburg effect by increasing glucose uptake, activating glycolysis and pentose phosphate pathway, increasing the level of lactate dehydrogenase A synthesis and inhibiting β-oxidation. Our considerations lead to conclusion that HPV is substantially involved in metabolic cell reprogramming toward neoplastic phenotype and its metabolic activity is the fundamental reason of its oncogenicity.
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Anti-Retroviral Protease Inhibitors Regulate Human Papillomavirus 16 Infection of Primary Oral and Cervical Epithelium. Cancers (Basel) 2020; 12:cancers12092664. [PMID: 32961945 PMCID: PMC7563395 DOI: 10.3390/cancers12092664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 09/10/2020] [Indexed: 12/20/2022] Open
Abstract
Simple Summary In 2016, globally, 36.7 million people were living with Human Immunodeficiency Virus (HIV), of which 53% had access to anti-retroviral therapy (ART) (UNAIDS 2017 Global HIV Statistics). The risk of Human Papillomavirus (HPV) associated oropharyngeal, cervical and anal cancers are higher among patients infected with HIV in the era of ART. Generally, HPV infections are self-limiting, however, persistent HPV infection is a major risk to carcinogenic progression. Long intervals between initial infection and cancer development imply cofactors are involved. Co-factors that increase infectivity, viral load, and persistence increase risk of cancer. We propose that the ART Protease Inhibitors (PI) class of drugs are novel co-factors that regulate HPV infection in HIV-infected patients. We developed a model system of organotypic epithelium to study impact of PI treatment on HPV16 infection. Our model could be used to study mechanisms of HPV infection in context of ART, and for developing drugs that minimize HPV infections. Abstract Epidemiology studies suggest that Human Immunodeficiency Virus (HIV)-infected patients on highly active anti-retroviral therapy (HAART) may be at increased risk of acquiring opportunistic Human Papillomavirus (HPV) infections and developing oral and cervical cancers. Effective HAART usage has improved survival but increased the risk for HPV-associated cancers. In this manuscript, we report that Protease Inhibitors (PI) treatment of three-dimensional tissues derived from primary human gingiva and cervical epithelial cells compromised cell-cell junctions within stratified epithelium and enhanced paracellular permeability of HPV16 to the basal layer for infection, culminating in de novo biosynthesis of progeny HPV16 as determined using 5-Bromo-2′-deoxyuridine (BrdU) labeling of newly synthesized genomes. We propose that HAART/PI represent a novel class of co-factors that modulate HPV infection of the target epithelium. Our in vitro tissue culture model is an important tool to study the mechanistic role of anti-retroviral drugs in promoting HPV infections in HAART-naïve primary epithelium. Changes in subsequent viral load could promote new infections, create HPV reservoirs that increase virus persistence, and increase the risk of oral and cervical cancer development in HIV-positive patients undergoing long-term HAART treatment.
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Iridoviral infection can be reduced by UCHL1-loaded exosomes from the testis of Chinese giant salamanders (Andrias davidianus). Vet Microbiol 2018; 224:50-57. [PMID: 30269790 DOI: 10.1016/j.vetmic.2018.08.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/26/2018] [Accepted: 08/28/2018] [Indexed: 11/22/2022]
Abstract
Chinese giant salamander iridovirus (CGSIV) is a large double-stranded DNA virus that infects Chinese giant salamanders (CGSs) and is responsible for a high mortality rate of CGSs under certain conditions. It is generally believed that CGSIV is a horizontally transmitting virus that affects lower vertebrates. Exosomes from tissues and cells affect the mechanism of viral infections. UCHL1, a deubiquitinating enzyme, is indirectly involved in virus propagation via cytokine and chemokine suppression. In our study, a few CGSIVs were detected in the testis of the special symptom CGSs using PCR and immunofluorescence analysis. The exosomes originating in the testicular fluid was isolated and identified using the Nanosight NS300 system and scanning electron microscopy. The UCHL1-loaded exosomes may resist CGSIV entry by fusing with and remodeling CGSIV. UCHL1 in the primary testicular fibroblasts was maintained at a stable level to inhibit the infection and replication of CGSIV by secreting and sorting exosomes. These data provided a new insight into CGSIV being a type of horizontally transmitting virus.
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Israr M, Rosenthal D, Frejo-Navarro L, DeVoti J, Meyers C, Bonagura VR. Microarray analysis of human keratinocytes from different anatomic sites reveals site-specific immune signaling and responses to human papillomavirus type 16 transfection. Mol Med 2018; 24:23. [PMID: 30134802 PMCID: PMC6016891 DOI: 10.1186/s10020-018-0022-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/24/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Stratified human keratinocytes (SHKs) are an essential part of mucosal innate immune response that modulates adaptive immunity to microbes encountered in the environment. The importance of these SHKs in mucosal integrity and development has been well characterized, however their regulatory immunologic role at different mucosal sites, has not. In this study we compared the immune gene expression of SHKs from five different anatomical sites before and after HPV16 transfection using microarray analyses. METHODS Individual pools of human keratinocytes from foreskin, cervix, vagina, gingiva, and tonsils (HFKs, HCKs, HVKs, HGKs and HTLKs) were prepared. Organotypic (raft) cultures were established for both normal and HPV16 immortalized HFKs, HCKs, HVKs, HGKs and HTLKs lines which stably maintained episomal HPV16 DNA. Microarray analysis was carried out using the HumanHT-12 V4 gene chip (Illumina). Immune gene expression profiles were obtained by global gene chip (GeneSifter) and Ingenuity pathway analysis (IPA) for each individual site, with or without HPV16 transfection. RESULTS We examined site specific innate immune response gene expression in SHKs from all five different anatomical sites before and after HPV16 transfection. We observed marked differences in SHK immune gene repertoires within and between mucosal tracts before HPV 16 infection. In addition, we observed additional changes in SHKs immune gene repertoire patterns when these SHKs were productively transfected with HPV16. Some immune response genes were similarly expressed by SHKs from different sites. However, there was also variable expression of non-immune response genes, such as keratin genes, by the different SHKs. CONCLUSIONS Our results suggest that keratinocytes from different anatomical sites are likely hard wired in their innate immune responses, and that these immune responses are unique depending on the anatomical site from which the SHKs were derived. These observations may help explain why select HPV types predominate at different mucosal sites, cause persistent infection at these sites, and on occasion, lead to HPV induced malignant and benign tumor development.
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Affiliation(s)
- Mohd Israr
- The Feinstein Institute for Medical Research, Manhasset, NY, USA; Division of Allergy and Immunology, Department of Pediatrics, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Great Neck, NY, USA
| | - David Rosenthal
- The Feinstein Institute for Medical Research, Manhasset, NY, USA; Division of Allergy and Immunology, Department of Pediatrics, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Great Neck, NY, USA
| | - Lidia Frejo-Navarro
- Department of Genomic Medicine, Otology and Neurotology Group CTS495, Centre for Genomics and Oncological Research, Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - James DeVoti
- The Feinstein Institute for Medical Research, Manhasset, NY, USA; Division of Allergy and Immunology, Department of Pediatrics, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Great Neck, NY, USA
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - Vincent R Bonagura
- The Feinstein Institute for Medical Research, Manhasset, NY, USA; Division of Allergy and Immunology, Department of Pediatrics, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Great Neck, NY, USA.
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Superinfection Exclusion between Two High-Risk Human Papillomavirus Types during a Coinfection. J Virol 2018; 92:JVI.01993-17. [PMID: 29437958 DOI: 10.1128/jvi.01993-17] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Accepted: 01/25/2018] [Indexed: 12/12/2022] Open
Abstract
Superinfection exclusion is a common phenomenon whereby a single cell is unable to be infected by two types of the same pathogen. Superinfection exclusion has been described for various viruses, including vaccinia virus, measles virus, hepatitis C virus, influenza A virus, and human immunodeficiency virus. Additionally, the mechanism of exclusion has been observed at various steps of the viral life cycle, including attachment, entry, viral genomic replication, transcription, and exocytosis. Human papillomavirus (HPV) is the causative agent of cervical cancer. Recent epidemiological studies indicate that up to 50% women who are HPV positive (HPV+) are infected with more than one HPV type. However, no mechanism of superinfection exclusion has ever been identified for HPV. Here, we show that superinfection exclusion exists during a HPV coinfection and that it occurs on the cell surface during the attachment/entry phase of the viral life cycle. Additionally, we are able to show that the minor capsid protein L2 plays a role in this exclusion. This study shows, for the first time, that superinfection exclusion occurs during HPV coinfections and describes a potential molecular mechanism through which it occurs.IMPORTANCE Superinfection exclusion is a phenomenon whereby one cell is unable to be infected by multiple related pathogens. This phenomenon has been described for many viruses and has been shown to occur at various points in the viral life cycle. HPV is the causative agent of cervical cancer and is involved in other anogenital and oropharyngeal cancers. Recent epidemiological research has shown that up to 50% of HPV-positive individuals harbor more than one type of HPV. We investigated the interaction between two high-risk HPV types, HPV16 and HPV18, during a coinfection. We present data showing that HPV16 is able to block or exclude HPV18 on the cell surface during a coinfection. This exclusion is due in part to differences in the HPV minor capsid protein L2. This report provides, for the first time, evidence of superinfection exclusion for HPV and leads to a better understanding of the complex interactions between multiple HPV types during coinfections.
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Chiang C, Pauli EK, Biryukov J, Feister KF, Meng M, White EA, Münger K, Howley PM, Meyers C, Gack MU. The Human Papillomavirus E6 Oncoprotein Targets USP15 and TRIM25 To Suppress RIG-I-Mediated Innate Immune Signaling. J Virol 2018; 92:e01737-17. [PMID: 29263274 PMCID: PMC5827370 DOI: 10.1128/jvi.01737-17] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 12/15/2017] [Indexed: 12/25/2022] Open
Abstract
Retinoic acid-inducible gene I (RIG-I) is a key pattern recognition receptor that senses viral RNA and interacts with the mitochondrial adaptor MAVS, triggering a signaling cascade that results in the production of type I interferons (IFNs). This signaling axis is initiated by K63-linked ubiquitination of RIG-I mediated by the E3 ubiquitin ligase TRIM25, which promotes the interaction of RIG-I with MAVS. USP15 was recently identified as an upstream regulator of TRIM25, stabilizing the enzyme through removal of degradative K48-linked polyubiquitin, ultimately promoting RIG-I-dependent cytokine responses. Here, we show that the E6 oncoprotein of human papillomavirus type 16 (HPV16) as well as of other HPV types form a complex with TRIM25 and USP15 in human cells. In the presence of E6, the K48-linked ubiquitination of TRIM25 was markedly increased, and in line with this, TRIM25 degradation was enhanced. Our results further showed that E6 inhibited the TRIM25-mediated K63-linked ubiquitination of RIG-I and its CARD-dependent interaction with MAVS. HPV16 E6, but not E7, suppressed the RIG-I-mediated induction of IFN-β, chemokines, and IFN-stimulated genes (ISGs). Finally, CRISPR-Cas9 gene targeting in human keratinocytes showed that the TRIM25-RIG-I-MAVS triad is important for eliciting an antiviral immune response to HPV16 infection. Our study thus identifies a novel immune escape mechanism that is conserved among different HPV strains and further indicates that the RIG-I signaling pathway plays an important role in the innate immune response to HPV infection.IMPORTANCE Persistent infection and tumorigenesis by HPVs are known to require viral manipulation of a variety of cellular processes, including those involved in innate immune responses. Here, we show that the HPV E6 oncoprotein antagonizes the activation of the cytoplasmic innate immune sensor RIG-I by targeting its upstream regulatory enzymes TRIM25 and USP15. We further show that the RIG-I signaling cascade is important for an antiviral innate immune response to HPV16 infection, providing evidence that RIG-I, whose role in sensing RNA virus infections has been well characterized, also plays a crucial role in the antiviral host response to small DNA viruses of the Papillomaviridae family.
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Affiliation(s)
- Cindy Chiang
- Department of Microbiology, The University of Chicago, Chicago, Illinois, USA
| | - Eva-Katharina Pauli
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Jennifer Biryukov
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA
| | - Katharina F Feister
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Melissa Meng
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Elizabeth A White
- Department of Otorhinolaryngology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Karl Münger
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Peter M Howley
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA
| | - Michaela U Gack
- Department of Microbiology, The University of Chicago, Chicago, Illinois, USA
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts, USA
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Biryukov J, Myers JC, McLaughlin-Drubin ME, Griffin HM, Milici J, Doorbar J, Meyers C. Mutations in HPV18 E1^E4 Impact Virus Capsid Assembly, Infectivity Competence, and Maturation. Viruses 2017; 9:v9120385. [PMID: 29257050 PMCID: PMC5744159 DOI: 10.3390/v9120385] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/14/2017] [Accepted: 12/15/2017] [Indexed: 01/24/2023] Open
Abstract
The most highly expressed protein during the productive phase of the human papillomavirus (HPV) life cycle is E1^E4. Its full role during infection remains to be established. HPV E1^E4 is expressed during both the early and late stages of the virus life cycle and contributes to viral genome amplification. In an attempt to further outline the functions of E1^E4, and determine whether it plays a role in viral capsid assembly and viral infectivity, we examined wild-type E1^E4 as well as four E1^E4 truncation mutants. Our study revealed that HPV18 genomes containing the shortest truncated form of E1^E4, the 17/18 mutant, produced viral titers that were similar to wild-type virus and significantly higher compared to virions containing the three longer E1^E4 mutants. Additionally, the infectivity of virus containing the shortest E1^E4 mutation was equivalent to wild-type and significantly higher than the other three mutants. In contrast, infectivity was completely abrogated for virus containing the longer E1^E4 mutants, regardless of virion maturity. Taken together, our results indicate for the first time that HPV18 E1^E4 impacts capsid assembly and viral infectivity as well as virus maturation.
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Affiliation(s)
- Jennifer Biryukov
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA; (J.B.); (J.C.M.); (M.E.M.-D.); (J.M.)
| | - Jocelyn C. Myers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA; (J.B.); (J.C.M.); (M.E.M.-D.); (J.M.)
| | - Margaret E. McLaughlin-Drubin
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA; (J.B.); (J.C.M.); (M.E.M.-D.); (J.M.)
- Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02215, USA
| | - Heather M. Griffin
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, UK; (H.M.G.); (J.D.)
| | - Janice Milici
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA; (J.B.); (J.C.M.); (M.E.M.-D.); (J.M.)
| | - John Doorbar
- Department of Pathology, University of Cambridge, Cambridge CB2 1QP, UK; (H.M.G.); (J.D.)
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA; (J.B.); (J.C.M.); (M.E.M.-D.); (J.M.)
- Correspondence: ; Tel.: +1-717-531-6240
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De Gregorio V, Imparato G, Urciuolo F, Tornesello ML, Annunziata C, Buonaguro FM, Netti PA. An Engineered Cell-Instructive Stroma for the Fabrication of a Novel Full Thickness Human Cervix Equivalent In Vitro. Adv Healthc Mater 2017; 6. [PMID: 28371541 DOI: 10.1002/adhm.201601199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/18/2017] [Indexed: 12/22/2022]
Abstract
There is a growing interest for developing organotypic cervical models by using primary cervical cells that are able to reproduce the physiological relevant stromal microenvironment and the distinctive histology of the native cervical epithelium. Here for the first time it is reported the production of an organotypic cervical model featured by a scaffold-free stromal tissue resembling the extracellular matrix (ECM) composition and organization of the native counterpart as well as a completely well-differentiated epithelium. To reach this aim, human cervical microtissue precursors have been produced, characterized, and used as functional building units to fabricate a cell-synthesized cervical stroma equivalent by means of a bottom-up approach. Immunotypization, and molecular and morphological analyses reveal the extent of fundamental epithelial biomarkers and the presence of collagen and noncollagenous molecules, demonstrating that the natural tissue architecture and biological characteristics of cervical tissues are reproduced. The results of this study suggest that the bottom-up technology used to produce these 3D human cervical equivalents provides a fully functional organotypic cervical model that may be used as a valuable tool to investigate the epithelial-stromal interactions as well as for testing new therapeutics in vitro.
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Affiliation(s)
- Vincenza De Gregorio
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia; Largo Barsanti e Matteucci 53 80125 Naples Italy
| | - Giorgia Imparato
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia; Largo Barsanti e Matteucci 53 80125 Naples Italy
| | - Francesco Urciuolo
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia; Largo Barsanti e Matteucci 53 80125 Naples Italy
| | - Maria L. Tornesello
- Molecular Biology and Viral Oncology Unit Istituto Nazionale, Tumori IRCCS “Fondazione Pascale”; 80131 Naples Italy
| | - Clorinda Annunziata
- Molecular Biology and Viral Oncology Unit Istituto Nazionale, Tumori IRCCS “Fondazione Pascale”; 80131 Naples Italy
| | - Franco M. Buonaguro
- Molecular Biology and Viral Oncology Unit Istituto Nazionale, Tumori IRCCS “Fondazione Pascale”; 80131 Naples Italy
| | - Paolo A. Netti
- Center for Advanced Biomaterials for HealthCare@CRIB; Istituto Italiano di Tecnologia; Largo Barsanti e Matteucci 53 80125 Naples Italy
- Molecular Biology and Viral Oncology Unit Istituto Nazionale, Tumori IRCCS “Fondazione Pascale”; 80131 Naples Italy
- Department of Chemical Materials and Industrial Production (DICMAPI); University of Naples Federico II; P.leTecchio 80 80125 Naples Italy
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Ma W, Tummers B, van Esch EMG, Goedemans R, Melief CJM, Meyers C, Boer JM, van der Burg SH. Human Papillomavirus Downregulates the Expression of IFITM1 and RIPK3 to Escape from IFNγ- and TNFα-Mediated Antiproliferative Effects and Necroptosis. Front Immunol 2016; 7:496. [PMID: 27920775 PMCID: PMC5118436 DOI: 10.3389/fimmu.2016.00496] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/26/2016] [Indexed: 01/29/2023] Open
Abstract
The clearance of a high-risk human papillomavirus (hrHPV) infection takes time and requires the local presence of a strong type 1 cytokine T cell response, suggesting that hrHPV has evolved mechanisms to resist this immune attack. Using an unique system for non, newly, and persistent hrHPV infection, we show that hrHPV infection renders keratinocytes (KCs) resistant to the antiproliferative- and necroptosis-inducing effects of IFNγ and TNFα. HrHPV-impaired necroptosis was associated with the upregulation of several methyltransferases, including EZH2, and the downregulation of RIPK3 expression. Restoration of RIPK3 expression using the global histone methyltransferase inhibitor 3-deazaneplanocin increased necroptosis in hrHPV-positive KCs. Simultaneously, hrHPV effectively inhibited IFNγ/TNFα-mediated arrest of cell growth at the S-phase by downregulating IFITM1 already at 48 h after hrHPV infection, followed by an impaired increase in the expression of the antiproliferative gene RARRES1 and a decrease of the proliferative gene PCNA. Knockdown of IFITM1 in uninfected KCs confirmed its role on RARRES1 and its antiproliferative effects. Thus, our study reveals how hrHPV deregulates two pathways involved in cell death and growth regulation to withstand immune-mediated control of hrHPV-infected cells.
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Affiliation(s)
- Wenbo Ma
- Department of Medical Oncology, Leiden University Medical Center , Leiden , Netherlands
| | - Bart Tummers
- Department of Medical Oncology, Leiden University Medical Center , Leiden , Netherlands
| | - Edith M G van Esch
- Department of Gynaecology, Leiden University Medical Center , Leiden , Netherlands
| | - Renske Goedemans
- Department of Medical Oncology, Leiden University Medical Center , Leiden , Netherlands
| | - Cornelis J M Melief
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center , Leiden , Netherlands
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine , Hershey, PA , USA
| | - Judith M Boer
- Human Genetics, Leiden University Medical Center , Leiden , Netherlands
| | - Sjoerd H van der Burg
- Department of Medical Oncology, Leiden University Medical Center , Leiden , Netherlands
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Three-dimensional cell culture models for investigating human viruses. Virol Sin 2016; 31:363-379. [PMID: 27822716 PMCID: PMC7090760 DOI: 10.1007/s12250-016-3889-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 10/21/2016] [Indexed: 12/15/2022] Open
Abstract
Three-dimensional (3D) culture models are physiologically relevant, as they provide reproducible results, experimental flexibility and can be adapted for high-throughput experiments. Moreover, these models bridge the gap between traditional two-dimensional (2D) monolayer cultures and animal models. 3D culture systems have significantly advanced basic cell science and tissue engineering, especially in the fields of cell biology and physiology, stem cell research, regenerative medicine, cancer research, drug discovery, and gene and protein expression studies. In addition, 3D models can provide unique insight into bacteriology, virology, parasitology and host-pathogen interactions. This review summarizes and analyzes recent progress in human virological research with 3D cell culture models. We discuss viral growth, replication, proliferation, infection, virus-host interactions and antiviral drugs in 3D culture models.
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Israr M, Biryukov J, Ryndock EJ, Alam S, Meyers C. Comparison of human papillomavirus type 16 replication in tonsil and foreskin epithelia. Virology 2016; 499:82-90. [PMID: 27639574 DOI: 10.1016/j.virol.2016.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/29/2016] [Accepted: 09/06/2016] [Indexed: 12/24/2022]
Abstract
Human papillomavirus (HPV) is well recognized as a causative agent for anogenital and oropharyngeal cancers, however, the biology of HPV infection at different mucosal locations, specifically the oral cavity, is not well understood. Importantly, it has yet to be determined if oral tissues are permissive for HPV infection and replication. We investigated for the first time the titers, infectivity, and maturation of HPV16 in oral epithelial versus genital epithelial tissue. We show that infectious HPV16 virions can be produced in oral tissue. This demonstrates, for the first time, that infectious virus could be spread via the oral cavity. HPV16 derived from oral tissue utilize a tissue-spanning redox gradient that facilitates the maturation of virions over time. Maturation is manifested by virion stability and increased susceptibility to neutralization with anti-HPV16 L1 antibodies. However, susceptibility to neutralization by anti-HPV16 L2 specific antibodies decreases during the maturation of HPV16 virions in oral tissue.
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Affiliation(s)
- Mohd Israr
- Department of Pediatrics, Division of Allergy and Immunology, The Feinstein Institute for Medical Research, Northwell Health, Manhasset, NY 11030, USA
| | - Jennifer Biryukov
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA
| | - Eric J Ryndock
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA 19104, USA
| | - Samina Alam
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA.
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14
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Li J, Yu L, Shen Z, Li Y, Chen B, Wei W, Chen X, Wang Q, Tong F, Lou H, Chu M, Wei L. miR-34a and its novel target, NLRC5, are associated with HPV16 persistence. INFECTION GENETICS AND EVOLUTION 2016; 44:293-299. [PMID: 27423514 DOI: 10.1016/j.meegid.2016.07.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 07/08/2016] [Accepted: 07/12/2016] [Indexed: 01/05/2023]
Abstract
Persistent infection with human papillomavirus (HPV), particularly type 16, is causally associated with cervical cancer and its precursors. The role of miRNAs in HPV16 persistence currently remains unclear. Preliminary analysis of miRNA profile demonstrated that HPV16 infection caused a striking downregulation of miR-34a. Through bioinformatics analysis and dual-luciferase assay with site-directed mutagenesis strategy, NLRC5, a negative regulator of NF-κB signaling, was identified to be a novel interactor of miR-34a. Transfection of miR-34a mimic strikingly downregulated NLRC5 in the HPV16-positive cervical cells, which might result in the nuclear accumulation of NF-κB p65. However, transfection of miR-34a inhibitor exhibited an opposite effect. The antagonistic expressions of NLRC5 and miR-34a were also observed in keratinocytes harboring HPV16 genome as well as in human cervical samples with persistent infection of HPV16. Our data uncover a previously unknown connection among HPV16 persistence, miR-34a and its interactor NLRC5.
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Affiliation(s)
- Jinyuan Li
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China
| | - Libo Yu
- Department of Gynaecology, The Third Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang, PR China
| | - Zhenji Shen
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China
| | - Yushu Li
- Department of Neurosurgery, The First Affiliated Hospital, Harbin Medical University, Harbin 150001, Heilongjiang, PR China
| | - Beibei Chen
- Department of Gynaecology, The Third Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang, PR China
| | - Wei Wei
- Department of Orthopedic Surgery, ,The First Affiliated Hospital of Jiamusi University, Jiamusi 154002, Heilongjiang, PR China
| | - Xiaohang Chen
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China
| | - Qingyi Wang
- Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Fangjia Tong
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China
| | - Huihuang Lou
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China
| | - Ming Chu
- Department of Neurosurgery, The First Affiliated Hospital, Harbin Medical University, Harbin 150001, Heilongjiang, PR China
| | - Lanlan Wei
- Department of Microbiology, Harbin Medical University, Immunity and Infection, Pathogenic Biology Key Laboratory in Heilongjiang Province, Harbin 150081, Heilongjiang, PR China.
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15
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Wang X, Zheng ZM. Construction of a Transcription Map for Papillomaviruses using RACE, RNase Protection, and Primer Extension Assays. ACTA ACUST UNITED AC 2016; 40:14B.6.1-14B.6.29. [PMID: 26855281 DOI: 10.1002/9780471729259.mc14b06s40] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Papillomaviruses are a family of small, non-enveloped DNA tumor viruses. Knowing a complete transcription map of each papillomavirus genome can provide guidance for various papillomavirus studies. This unit provides detailed protocols to construct a transcription map of human papillomavirus type 18. The same approach can be easily adapted to other transcription map studies of any other papillomavirus genotype due to the high degree of conservation in genome structure, organization, and gene expression among papillomaviruses. The focused methods are 5'- and 3'-rapid amplification of cDNA ends (RACE), which are techniques commonly used in molecular biology to obtain full-length RNA transcript or to map a transcription start site (TSS) or an RNA polyadenylation (pA) cleavage site. Primer walking RT-PCR is a method for studying the splicing junction of RACE products. In addition, RNase protection assay and primer extension are also introduced as alternative methods in the mapping analysis.
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Affiliation(s)
- Xiaohong Wang
- Tumor Virus RNA Biology Section, Gene Regulation and Chromosome Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland
| | - Zhi-Ming Zheng
- Tumor Virus RNA Biology Section, Gene Regulation and Chromosome Biology Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland
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16
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Biryukov J, Meyers C. Papillomavirus Infectious Pathways: A Comparison of Systems. Viruses 2015; 7:4303-25. [PMID: 26247955 PMCID: PMC4576184 DOI: 10.3390/v7082823] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 06/06/2015] [Accepted: 07/23/2015] [Indexed: 12/19/2022] Open
Abstract
The HPV viral lifecycle is tightly linked to the host cell differentiation, causing difficulty in growing virions in culture. A system that bypasses the need for differentiating epithelium has allowed for generation of recombinant particles, such as virus-like particles (VLPs), pseudovirions (PsV), and quasivirions (QV). Much of the research looking at the HPV life cycle, infectivity, and structure has been generated utilizing recombinant particles. While recombinant particles have proven to be invaluable, allowing for a rapid progression of the HPV field, there are some significant differences between recombinant particles and native virions and very few comparative studies using native virions to confirm results are done. This review serves to address the conflicting data in the HPV field regarding native virions and recombinant particles.
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Affiliation(s)
- Jennifer Biryukov
- Department of Microbiology and Immunology, The Pennsylvania State University, 500 University Drive, Hershey, PA 17033, USA.
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University, 500 University Drive, Hershey, PA 17033, USA.
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17
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Tummers B, Goedemans R, Pelascini LPL, Jordanova ES, van Esch EMG, Meyers C, Melief CJM, Boer JM, van der Burg SH. The interferon-related developmental regulator 1 is used by human papillomavirus to suppress NFκB activation. Nat Commun 2015; 6:6537. [PMID: 26055519 PMCID: PMC4382698 DOI: 10.1038/ncomms7537] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 02/05/2015] [Indexed: 12/26/2022] Open
Abstract
High-risk human papillomaviruses (hrHPVs) infect keratinocytes and successfully evade host immunity despite the fact that keratinocytes are well equipped to respond to innate and adaptive immune signals. Using non-infected and freshly established or persistent hrHPV-infected keratinocytes we show that hrHPV impairs the acetylation of NFκB/RelA K310 in keratinocytes. As a consequence, keratinocytes display a decreased pro-inflammatory cytokine production and immune cell attraction in response to stimuli of the innate or adaptive immune pathways. HPV accomplishes this by augmenting the expression of interferon-related developmental regulator 1 (IFRD1) in an EGFR-dependent manner. Restoration of NFκB/RelA acetylation by IFRD1 shRNA, cetuximab treatment or the HDAC1/3 inhibitor entinostat increases basal and induced cytokine expression. Similar observations are made in IFRD1-overexpressing HPV-induced cancer cells. Thus, our study reveals an EGFR–IFRD1-mediated viral immune evasion mechanism, which can also be exploited by cancer cells. Human papillomavirus employs immune evasion strategies to establish a long-term infection. Here the authors show that the virus in the EGFR-dependent manner induces IFRD1, which blocks NFκB activating acetylation, and that this process can be suppressed by the EGFR inhibitor cetuximab.
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Affiliation(s)
- Bart Tummers
- Department of Clinical Oncology, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Renske Goedemans
- Department of Clinical Oncology, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Laetitia P L Pelascini
- Department of Molecular Cell Biology, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Ekaterina S Jordanova
- Center for Gynaecological Oncology, Plesmanlaan 121, 1066CX Amsterdam, The Netherlands
| | - Edith M G van Esch
- Department of Gynaecology, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, 500 University Drive, Hershey, Pennsylvania 17033, USA
| | - Cornelis J M Melief
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Judith M Boer
- Department of Human Genetics, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
| | - Sjoerd H van der Burg
- Department of Clinical Oncology, Leiden University Medical Center, Albinusdreef 2, 2333ZA Leiden, The Netherlands
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18
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Du P, Brendle S, Milici J, Camacho F, Zurlo J, Christensen N, Meyers C. Comparisons of VLP-Based ELISA, Neutralization Assays with Native HPV, and Neutralization Assays with PsV in Detecting HPV Antibody Responses in HIV-Infected Women. ACTA ACUST UNITED AC 2015; 6. [PMID: 26085957 DOI: 10.4172/2155-6113.1000433] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Human papillomavirus (HPV)-associated cancers are important public health problems in HIV-infected people. Assays based on HPV virus-like particles (VLP) and pseudoviruses (PsV) are commonly used to examine HPV antibody responses in HIV-infected people, but neutralization assays with native HPV have not been utilized and a comparison of these three assays is lacking. We evaluated the agreement of assays using VLP, native HPV and PsV in detecting HPV16 and 18 antibodies in HIV-infected women. METHODS The VLP-based ELISA (VLP-ELISA) was used to detect antibody responses to HPV16 and 18 and cottontail rabbit papillomavirus (CRPV) VLP antigens. Neutralization assays with native HPV (NA-HPV) and with PsV (NA-PsV) were conducted to examine HPV16 or 18 neutralizing antibodies. Intra class correlation coefficients (ICC) and kappa coefficients were used to assess the agreements of seropositivity between the assays. RESULTS The seroprevalence detected by the VLP-ELISA, NA-HPV and NA-PsV in 94 HIV-infected women was 35%, 51% and 27% for HPV16 and 14%, 44% and 21% for HPV18. Cross-reactivity between HPV16 and HPV18 was 0.35, 0.04 and 0.33 (kappa coefficients) for the VLP-ELISA, NA-HPV and NA-PsV. The agreements of seropositivity between the three assays were low. Six women who were HPV16 DNA positive were seropositive by the NA-HPV but only two were HPV16 seropositive by the VLP-ELISA or NA-PsV. One HPV18 DNA positive woman was seropositive by all three assays. Repeated tests indicated excellent reproducibility of the NA-HPV. CONCLUSION HPV serology results vary across different assays. The NA-HPV appears to be a sensitive and reliable approach in detecting natural HPV antibodies in HIV-infected women. The NA-HPV can be applied in both HPV natural history studies and vaccine studies in HIV-infected people.
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Affiliation(s)
- Ping Du
- Department of Medicine, The Pennsylvania State University College of Medicine, USA ; Department of Public Health Sciences, The Pennsylvania State University College of Medicine, USA
| | - Sarah Brendle
- Department of Pathology, The Pennsylvania State University College of Medicine, USA
| | - Janice Milici
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, USA
| | - Fabian Camacho
- Department of Public Health Sciences, The Pennsylvania State University College of Medicine, USA
| | - John Zurlo
- Department of Medicine, The Pennsylvania State University College of Medicine, USA
| | - Neil Christensen
- Department of Pathology, The Pennsylvania State University College of Medicine, USA
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, USA
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19
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Abstract
Human papillomaviruses (HPV) are the major factor in causing cervical cancer as well as being implicated in causing oral and anal cancers. The life cycle of HPV is tied to the epithelial differentiation system, as only native virus can be produced in stratified human skin. Initially, HPV research was only possible utilizing recombinant systems in monolayer culture. With new cell culture technology, systems using differentiated skin have allowed HPV to be studied in its native environment. Here, we describe current research studying native virions in differentiated skin including viral assembly, maturation, capsid protein interactions, and L2 cross-neutralizing epitopes. In doing so, we hope to show how differentiating skin systems have increased our knowledge of HPV biology and identify gaps in our knowledge about this important virus.
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20
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Vesicular trafficking of incoming human papillomavirus 16 to the Golgi apparatus and endoplasmic reticulum requires γ-secretase activity. mBio 2014; 5:e01777-14. [PMID: 25227470 PMCID: PMC4172078 DOI: 10.1128/mbio.01777-14] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The route taken by papillomaviruses from the cell surface to the nucleus during infection is incompletely understood. Here, we developed a novel human papillomavirus 16 (HPV16) pseudovirus in which the carboxy terminus of the minor capsid protein L2 is exposed on the exterior of the intact capsid prior to cell binding. With this pseudovirus, we used the proximity ligation assay immune detection technique to demonstrate that during entry HPV16 L2 traffics into and out of the early endosome prior to Golgi localization, and we demonstrated that L2 enters the endoplasmic reticulum during entry. The cellular membrane-associated protease, γ-secretase, is required for infection by HPV16 pseudovirus and authentic HPV16. We also showed that inhibition of γ-secretase does not interfere substantively with virus internalization, initiation of capsid disassembly, entry into the early endosome, or exit from this compartment, but γ-secretase is required for localization of L2 and viral DNA to the Golgi apparatus and the endoplasmic reticulum. These results show that incoming HPV16 traffics sequentially from the cell surface to the endosome and then to the Golgi apparatus and the endoplasmic reticulum prior to nuclear entry. The human papillomaviruses are small nonenveloped DNA viruses responsible for approximately 5% of all human cancer deaths, but little is known about the process by which these viruses transit from the cell surface to the nucleus. Here we show that incoming HPV16, the most common high-risk HPV, traffics though a series of vesicular compartments during infectious entry, including the endosome, Golgi apparatus, and endoplasmic reticulum. Furthermore, we show that γ-secretase, a cellular membrane-associated protease, is required for entry of the L2 minor capsid protein and viral DNA into the Golgi apparatus and endoplasmic reticulum. These studies reveal a new pathway of cell entry by DNA viruses and suggest that components of this pathway are candidate antiviral targets.
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21
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CD40-mediated amplification of local immunity by epithelial cells is impaired by HPV. J Invest Dermatol 2014; 134:2918-2927. [PMID: 24945092 PMCID: PMC4227541 DOI: 10.1038/jid.2014.262] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 05/19/2014] [Accepted: 05/20/2014] [Indexed: 12/30/2022]
Abstract
The interaction between the transmembrane glycoprotein surface receptor CD40 expressed by skin epithelial cells (ECs) and its T-cell–expressed ligand CD154 was suggested to exacerbate inflammatory skin diseases. However, the full spectrum of CD40-mediated effects by ECs underlying this observation is unknown. Therefore, changes in gene expression after CD40 ligation of ECs were studied by microarrays. CD40-mediated activation for 2 hours stimulated the expression of a coordinated network of immune-involved genes strongly interconnected by IL8 and TNF, whereas after 24 hours anti-proliferative and anti-apoptotic genes were upregulated. CD40 ligation was associated with the production of chemokines and the attraction of lymphocytes and myeloid cells from peripheral blood mononuclear cells (PBMCs). Thus, CD40-mediated activation of ECs resulted in a highly coordinated response of genes required for the local development and sustainment of adaptive immune responses. The importance of this process was confirmed by a study on the effects of human papilloma virus (HPV) infection to the EC's response to CD40 ligation. HPV infection clearly attenuated the magnitude of the response to CD40 ligation and the EC's capacity to attract PBMCs. The fact that HPV attenuates CD40 signaling in ECs indicates the importance of the CD40-CD154 immune pathway in boosting cellular immunity within epithelia.
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22
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Ryndock EJ, Conway MJ, Alam S, Gul S, Murad S, Christensen ND, Meyers C. Roles for human papillomavirus type 16 l1 cysteine residues 161, 229, and 379 in genome encapsidation and capsid stability. PLoS One 2014; 9:e99488. [PMID: 24918586 PMCID: PMC4053435 DOI: 10.1371/journal.pone.0099488] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 05/15/2014] [Indexed: 12/13/2022] Open
Abstract
Human papillomavirus (HPV) capsids are formed through a network of inter- and intra-pentameric hydrophobic interactions and disulfide bonds. 72 pentamers of the major capsid protein, L1, and an unknown amount of the minor capsid protein, L2, form the structure of the capsid. There are 12 conserved L1 cysteine residues in HPV16. While C175, C185, and C428 have been implicated in the formation of a critical inter-pentameric disulfide bond, no structural or functional roles have been firmly attributed to any of the other conserved cysteine residues. Here, we show that substitution of cysteine residues C161, C229, and C379 for serine hinders the accumulation of endonuclease-resistant genomes as virions mature within stratifying and differentiating human epithelial tissue. C229S mutant virions form, but are non-infectious. These studies add detail to the differentiation-dependent assembly and maturation that occur during the HPV16 life cycle in human tissue.
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Affiliation(s)
- Eric J. Ryndock
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Michael J. Conway
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Samina Alam
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Sana Gul
- Health Care Biotechnology Department, Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan
| | - Sheeba Murad
- Health Care Biotechnology Department, Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan
| | - Neil D. Christensen
- Department of Pathology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
- * E-mail:
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23
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Wang JW, Jagu S, Kwak K, Wang C, Peng S, Kirnbauer R, Roden RBS. Preparation and properties of a papillomavirus infectious intermediate and its utility for neutralization studies. Virology 2013; 449:304-16. [PMID: 24418565 DOI: 10.1016/j.virol.2013.10.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 10/18/2013] [Accepted: 10/29/2013] [Indexed: 02/07/2023]
Abstract
We show that minor capsid protein L2 is full length in clinical virion isolates and prepare furin-cleaved pseudovirus (fcPsV) as a model of the infectious intermediate for multiple human papillomavirus (HPV) types. These fcPsV do not require furin for in vitro infection, and are fully infectious in vivo. Both the γ-secretase inhibitor XXI and carrageenan block fcPsV infection in vitro and in vivo implying that they act after furin-cleavage of L2. Despite their enhanced exposure of L2 epitopes, vaccination with fcPsV particles fails to induce L2 antibody, although L1-specific responses are similar to PsV with intact L2. FcPsV can be applied in a simple, high-throughput neutralization assay that detects L2-specific neutralizing antibodies with >10-fold enhanced sensitivity compared with the PsV-based assay. The PsV and fcPsV-based assays exhibit similar sensitivity for type-specific antibodies elicited by L1 virus-like particles (VLP), but the latter improves detection of L1-specific cross-type neutralizing antibodies.
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Affiliation(s)
- Joshua W Wang
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231, USA
| | - Subhashini Jagu
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231, USA
| | - Kihyuck Kwak
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231, USA
| | - Chenguang Wang
- Department of Biostatistics, The Johns Hopkins University, Baltimore, MD 21231, USA
| | - Shiwen Peng
- Department of Oncology, The Johns Hopkins University, Baltimore, MD 21231, USA
| | - Reinhard Kirnbauer
- Laboratory of Viral Oncology, Division of Immunology, Allergy and Infectious Diseases, Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria
| | - Richard B S Roden
- Department of Pathology, The Johns Hopkins University, Baltimore, MD 21231, USA; Department of Oncology, The Johns Hopkins University, Baltimore, MD 21231, USA; Department of Gynecology and Obstetrics, The Johns Hopkins University, Baltimore, MD 21231, USA.
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24
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Karim R, Tummers B, Meyers C, Biryukov JL, Alam S, Backendorf C, Jha V, Offringa R, van Ommen GJB, Melief CJM, Guardavaccaro D, Boer JM, van der Burg SH. Human papillomavirus (HPV) upregulates the cellular deubiquitinase UCHL1 to suppress the keratinocyte's innate immune response. PLoS Pathog 2013; 9:e1003384. [PMID: 23717208 PMCID: PMC3662672 DOI: 10.1371/journal.ppat.1003384] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 04/10/2013] [Indexed: 12/24/2022] Open
Abstract
Persistent infection of basal keratinocytes with high-risk human papillomavirus (hrHPV) may cause cancer. Keratinocytes are equipped with different pattern recognition receptors (PRRs) but hrHPV has developed ways to dampen their signals resulting in minimal inflammation and evasion of host immunity for sustained periods of time. To understand the mechanisms underlying hrHPV's capacity to evade immunity, we studied PRR signaling in non, newly, and persistently hrHPV-infected keratinocytes. We found that active infection with hrHPV hampered the relay of signals downstream of the PRRs to the nucleus, thereby affecting the production of type-I interferon and pro-inflammatory cytokines and chemokines. This suppression was shown to depend on hrHPV-induced expression of the cellular protein ubiquitin carboxyl-terminal hydrolase L1 (UCHL1) in keratinocytes. UCHL1 accomplished this by inhibiting tumor necrosis factor receptor-associated factor 3 (TRAF3) K63 poly-ubiquitination which lead to lower levels of TRAF3 bound to TANK-binding kinase 1 and a reduced phosphorylation of interferon regulatory factor 3. Furthermore, UCHL1 mediated the degradation of the NF-kappa-B essential modulator with as result the suppression of p65 phosphorylation and canonical NF-κB signaling. We conclude that hrHPV exploits the cellular protein UCHL1 to evade host innate immunity by suppressing PRR-induced keratinocyte-mediated production of interferons, cytokines and chemokines, which normally results in the attraction and activation of an adaptive immune response. This identifies UCHL1 as a negative regulator of PRR-induced immune responses and consequently its virus-increased expression as a strategy for hrHPV to persist.
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Affiliation(s)
- Rezaul Karim
- Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, The Netherlands
| | - Bart Tummers
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, The Netherlands
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Jennifer L. Biryukov
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Samina Alam
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Claude Backendorf
- Laboratory of Molecular Genetics, Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, Leiden, The Netherlands
| | - Veena Jha
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, The Netherlands
| | - Rienk Offringa
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Gert-Jan B. van Ommen
- Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Cornelis J. M. Melief
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, The Netherlands
| | - Daniele Guardavaccaro
- Hubrecht Institute-KNAW and University Medical Center Utrecht, Utrecht, The Netherlands
| | - Judith M. Boer
- Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Sjoerd H. van der Burg
- Department of Clinical Oncology, Leiden University Medical Center, Leiden, The Netherlands
- * E-mail:
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25
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Schellenbacher C, Kwak K, Fink D, Shafti-Keramat S, Huber B, Jindra C, Faust H, Dillner J, Roden RBS, Kirnbauer R. Efficacy of RG1-VLP vaccination against infections with genital and cutaneous human papillomaviruses. J Invest Dermatol 2013; 133:2706-2713. [PMID: 23752042 PMCID: PMC3826974 DOI: 10.1038/jid.2013.253] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Accepted: 05/15/2013] [Indexed: 12/20/2022]
Abstract
Licensed human papillomavirus (HPV) vaccines, based on virus-like particles (VLPs) self-assembled from major capsid protein L1, afford type-restricted protection against HPV types 16/18/6/11 (or 16/18 for the bivalent vaccine), which cause 70% of cervical cancers (CxCas) and 90% of genital warts. However, they do not protect against less prevalent high-risk (HR) types causing 30% of CxCa, or cutaneous HPV. In contrast, vaccination with the minor capsid protein L2 induces low-level immunity to type-common epitopes. Chimeric RG1-VLP presenting HPV16 L2 amino acids 17–36 (RG1 epitope) within the DE-surface loop of HPV16 L1 induced cross-neutralizing antisera. We hypothesized that RG1-VLP vaccination protects against a large spectrum of mucosal and cutaneous HPV infections in vivo. Immunization with RG1-VLP adjuvanted with human-applicable alum-MPL (aluminum hydroxide plus 3-O-desacyl-4′-monophosphoryl lipid A) induced robust L2 antibodies (ELISA titers 2,500–12,500), which (cross-)neutralized mucosal HR HPV16/18/45/37/33/52/58/35/39/51/59/68/73/26/69/34/70, low-risk HPV6/11/32/40, and cutaneous HPV2/27/3/76 (titers 25–1,000) using native virion- or pseudovirion (PsV)-based assays, and a vigorous cytotoxic T lymphocyte response by enzyme-linked immunospot. In vivo, mice were efficiently protected against experimental vaginal challenge with mucosal HR PsV types HPV16/18/45/31/33/52/58/35/39/51/59/68/56/73/26/53/66/34 and low-risk HPV6/43/44. Enduring protection was demonstrated 1 year after vaccination. RG1-VLP is a promising next-generation vaccine with broad efficacy against all relevant mucosal and also cutaneous HPV types.
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Affiliation(s)
- Christina Schellenbacher
- Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria
| | - Kihyuck Kwak
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Dieter Fink
- Institute of Laboratory Animal Science, Veterinary University Vienna, Vienna, Austria
| | - Saeed Shafti-Keramat
- Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria
| | - Bettina Huber
- Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria
| | - Christoph Jindra
- Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria
| | - Helena Faust
- Department of Laboratory Medicine, Lund University, Malmö University Hospital, Malmö, Sweden
| | - Joakim Dillner
- Department of Laboratory Medicine, Medical Epidemiology and Biostatistics, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Richard B S Roden
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Reinhard Kirnbauer
- Laboratory of Viral Oncology (LVO), Division of Immunology, Allergy and Infectious Diseases (DIAID), Department of Dermatology, Medical University Vienna (MUW), Vienna, Austria.
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Polyethylenimine is a strong inhibitor of human papillomavirus and cytomegalovirus infection. Antimicrob Agents Chemother 2011; 56:75-82. [PMID: 21968369 DOI: 10.1128/aac.05147-11] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Polyethylenimines are cationic polymers with potential as delivery vectors in gene therapy and with proven antimicrobial activity. However, the antiviral activity of polyethylenimines has not been addressed in detail thus far. We have studied the inhibitory effects of a linear 25-kDa polyethylenimine on infections with human papillomaviruses and human cytomegaloviruses. Preincubation of cells with polyethylenimine blocked primary attachment of both viruses to cells, resulting in a significant reduction of infection. In addition, the dissemination of human cytomegalovirus in culture cells was efficiently reduced by recurrent administration of polyethylenimine. Polyethylenimine concentrations required for inhibition of human papillomavirus and cytomegalovirus did not cause any cytotoxic effects. Polyethylenimines and their derivatives may thus be attractive molecules for the development of antiviral microbicides.
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27
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Conway MJ, Cruz L, Alam S, Christensen ND, Meyers C. Differentiation-dependent interpentameric disulfide bond stabilizes native human papillomavirus type 16. PLoS One 2011; 6:e22427. [PMID: 21811610 PMCID: PMC3139651 DOI: 10.1371/journal.pone.0022427] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Accepted: 06/23/2011] [Indexed: 11/18/2022] Open
Abstract
Genetic and biochemical analyses of human papillomavirus type 16 (HPV16) capsids have shown that certain conserved L1 cysteine residues are critical for capsid assembly, integrity, and maturation. Since previous studies utilized HPV capsids produced in monolayer culture-based protein expression systems, the ascribed roles for these cysteine residues were not placed in the temporal context of the natural host environment for HPV, stratifying and differentiating human tissue. Here we extend upon previous observation, that HPV16 capsids mature and become stabilized over time (10-day to 20-day) in a naturally occurring tissue-spanning redox gradient, by identifying temporal roles for individual L1 cysteine residues. Specifically, the C175S substitution severely undermined wild-type titers of the virus within both 10 and 20-day tissue, while C428S, C185S, and C175,185S substitutions severely undermined wild-type titers only within 20-day tissue. All mutations led to 20-day virions that were less stable than wild-type and failed to form L1 multimers via nonreducing SDS-PAGE. Furthermore, Optiprep-fractionated 20-day C428S, C175S, and C175,185S capsids appeared permeable to endonucleases in comparison to wild-type and C185S capsids. Exposure to an oxidizing environment failed to enhance infectious titers of any of the cysteine mutants over time as with wild-type. Introduction of these cys mutants results in failure of the virus to mature.
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Affiliation(s)
- Michael J. Conway
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Linda Cruz
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Samina Alam
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Neil D. Christensen
- Department of Pathology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Craig Meyers
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United States of America
- * E-mail:
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28
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Bowser BS, Chen HS, Conway MJ, Christensen ND, Meyers C. Human papillomavirus type 18 chimeras containing the L2/L1 capsid genes from evolutionarily diverse papillomavirus types generate infectious virus. Virus Res 2011; 160:246-55. [PMID: 21762735 DOI: 10.1016/j.virusres.2011.06.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Revised: 06/28/2011] [Accepted: 06/28/2011] [Indexed: 01/04/2023]
Abstract
Papillomaviruses (PVs) comprise a large family of viruses infecting nearly all vertebrate species, with more than 100 human PVs identified. Our previous studies showed that a mutant chimera HPV18/16 genome, consisting of the upper regulatory region and early ORFs of HPV18 and the late ORFs of HPV16, was capable of producing infectious virus in organotypic raft cultures. We were interested in determining whether the ability of this chimeric genome to produce infectious virus was the result of HPV18 and HPV16 being similarly oncogenic, anogenital types and whether more disparate PV types could also interact functionally. To test this we created a series of HPV18 chimeric genomes where the ORFs for the HPV18 capsid genes were replaced with the capsid genes of HPV45, HPV39, HPV33, HPV31, HPV11, HPV6b, HPV1a, CRPV, and BPV1. All chimeras were able to produce infectious chimeric viral particles, although with lower infectivity than wild-type HPV18. Steps in the viral life cycle and characteristics of the viral particles were examined to identify potential causes for the decrease in infectivity.
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Affiliation(s)
- Brian S Bowser
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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29
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Construction of a full transcription map of human papillomavirus type 18 during productive viral infection. J Virol 2011; 85:8080-92. [PMID: 21680515 DOI: 10.1128/jvi.00670-11] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Human papillomavirus type 18 (HPV18) is the second most common oncogenic HPV genotype, responsible for ∼15% of cervical cancers worldwide. In this study, we constructed a full HPV18 transcription map using HPV18-infected raft tissues derived from primary human vaginal or foreskin keratinocytes. By using 5' rapid amplification of cDNA ends (RACE), we mapped two HPV18 transcription start sites (TSS) for early transcripts at nucleotide (nt) 55 and nt 102 and the HPV18 late TSS frequently at nt 811, 765, or 829 within the E7 open reading frame (ORF) of the virus genome. HPV18 polyadenylation cleavage sites for early and late transcripts were mapped to nt 4270 and mainly to nt 7299 or 7307, respectively, by using 3' RACE. Although all early transcripts were cleaved exclusively at a single cleavage site, HPV18 late transcripts displayed the heterogeneity of 3' ends, with multiple minor cleavage sites for late RNA polyadenylation. HPV18 splice sites/splice junctions for both early and late transcripts were identified by 5' RACE and primer walking techniques. Five 5' splice sites (donor sites) and six 3' splice sites (acceptor sites) that are highly conserved in other papillomaviruses were identified in the HPV18 genome. HPV18 L1 mRNA translates a L1 protein of 507 amino acids (aa), smaller than the 568 aa residues previously predicted. Collectively, a full HPV18 transcription map constructed from this report will lead us to further understand HPV18 gene expression and virus oncogenesis.
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30
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Karim R, Meyers C, Backendorf C, Ludigs K, Offringa R, van Ommen GJB, Melief CJM, van der Burg SH, Boer JM. Human papillomavirus deregulates the response of a cellular network comprising of chemotactic and proinflammatory genes. PLoS One 2011; 6:e17848. [PMID: 21423754 PMCID: PMC3056770 DOI: 10.1371/journal.pone.0017848] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 02/10/2011] [Indexed: 02/06/2023] Open
Abstract
Despite the presence of intracellular pathogen recognition receptors that allow
infected cells to attract the immune system, undifferentiated keratinocytes
(KCs) are the main targets for latent infection with high-risk human papilloma
viruses (hrHPVs). HPV infections are transient but on average last for more than
one year suggesting that HPV has developed means to evade host immunity. To
understand how HPV persists, we studied the innate immune response of
undifferentiated human KCs harboring episomal copies of HPV16 and 18 by
genome-wide expression profiling. Our data showed that the expression of the
different virus-sensing receptors was not affected by the presence of HPV.
Poly(I:C) stimulation of the viral RNA receptors TLR3,
PKR, MDA5 and RIG-I, the
latter of which indirectly senses viral DNA through non-self RNA polymerase III
transcripts, showed dampening in downstream signalling of these receptors by
HPVs. Many of the genes downregulated in HPV-positive KCs involved components of
the antigen presenting pathway, the inflammasome, the production of antivirals,
pro-inflammatory and chemotactic cytokines, and components downstream of
activated pathogen receptors. Notably, gene and/or protein interaction analysis
revealed the downregulation of a network of genes that was strongly
interconnected by IL-1β, a crucial cytokine to activate adaptive immunity.
In summary, our comprehensive expression profiling approach revealed that HPV16
and 18 coordinate a broad deregulation of the keratinocyte's inflammatory
response, and contributes to the understanding of virus persistence.
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Affiliation(s)
- Rezaul Karim
- Center for Human and Clinical Genetics, Leiden
University Medical Center, Leiden, The Netherlands
- Department of Immunohematology and Blood
Transfusion, Leiden University Medical Center, Leiden, The
Netherlands
- Department of Clinical Oncology, Leiden
University Medical Center, Leiden, The Netherlands
| | - Craig Meyers
- Department of Microbiology and Immunology, The
Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United
States of America
| | - Claude Backendorf
- Laboratory of Molecular Genetics, Leiden
Institute of Chemistry, Gorlaeus Laboratories, Leiden University, Leiden, The
Netherlands
| | - Kristina Ludigs
- Department of Immunohematology and Blood
Transfusion, Leiden University Medical Center, Leiden, The
Netherlands
| | - Rienk Offringa
- Department of Immunohematology and Blood
Transfusion, Leiden University Medical Center, Leiden, The
Netherlands
| | - Gert-Jan B. van Ommen
- Center for Human and Clinical Genetics, Leiden
University Medical Center, Leiden, The Netherlands
| | - Cornelis J. M. Melief
- Department of Immunohematology and Blood
Transfusion, Leiden University Medical Center, Leiden, The
Netherlands
| | - Sjoerd H. van der Burg
- Department of Clinical Oncology, Leiden
University Medical Center, Leiden, The Netherlands
| | - Judith M. Boer
- Center for Human and Clinical Genetics, Leiden
University Medical Center, Leiden, The Netherlands
- Netherlands Bioinformatics Centre, Nijmegen,
The Netherlands
- * E-mail:
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31
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Chen HS, Conway MJ, Christensen ND, Alam S, Meyers C. Papillomavirus capsid proteins mutually impact structure. Virology 2011; 412:378-83. [PMID: 21329956 DOI: 10.1016/j.virol.2011.01.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2010] [Revised: 12/06/2010] [Accepted: 01/14/2011] [Indexed: 02/08/2023]
Abstract
We studied a panel of mutant viruses containing wild-type and chimeric capsid HPV16 and HPV18 proteins. The mutant capsid protein expression, genome amplification, and episomal maintenance were comparable with the wild-type virus. However, the chimeric viruses varied in their titers from wild-type. We show that the intertypical mutant chimeric capsid viruses, that L2 affects the structure of L1 and that L1 affects the structure of L2 in the virion. These effects were measured using a panel of conformation-dependent neutralizing L1 MAbs and an L2 capsid surface peptide derived neutralizing antibody. These data suggest that variation of one capsid gene not only affects its own structure and antigenicity, but also affects the structure and antigenicity of the other capsid protein. Implications of our data suggest that for the continued effectiveness of a vaccine, variation in both capsid proteins need to be considered and not just the protein the vaccine is directed against.
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Affiliation(s)
- Horng-Shen Chen
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, 500 University Drive, Hershey, PA 17033, USA
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32
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Conway MJ, Cruz L, Alam S, Christensen ND, Meyers C. Cross-neutralization potential of native human papillomavirus N-terminal L2 epitopes. PLoS One 2011; 6:e16405. [PMID: 21346798 PMCID: PMC3035607 DOI: 10.1371/journal.pone.0016405] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Accepted: 12/20/2010] [Indexed: 11/18/2022] Open
Abstract
Background Human papillomavirus (HPV) capsids are composed of 72 pentamers of the major
capsid protein L1, and an unknown number of L2 minor capsid proteins. An
N-terminal “external loop” of L2 contains cross-neutralizing
epitopes, and native HPV16 virions extracted from 20-day-old organotypic
tissues are neutralized by anti-HPV16 L2 antibodies but virus from
10-day-old cultures are not, suggesting that L2 epitopes are more exposed in
mature, 20-day virions. This current study was undertaken to determine
whether cross-neutralization of other HPV types is similarly dependent on
time of harvest and to screen for the most effective cross-neutralizing
epitope in native virions. Methodology and Principal Findings Neutralization assays support that although HPV16 L2 epitopes were only
exposed in 20-day virions, HPV31 or HPV18 epitopes behaved differently.
Instead, HPV31 and HPV18 L2 epitopes were exposed in 10-day virions and
remained so in 20-day virions. In contrast, presumably due to sequence
divergence, HPV45 was not cross-neutralized by any of the anti-HPV16 L2
antibodies. We found that the most effective cross-neutralizing antibody was
a polyclonal antibody named anti-P56/75 #1, which was raised against a
peptide consisting of highly conserved HPV16 L2 amino acids 56 to 75. Conclusions and Significance This is the first study to determine the susceptibility of multiple, native
high-risk HPV types to neutralization by L2 antibodies. Multiple anti-L2
antibodies were able to cross-neutralize HPV16, HPV31, and HPV18. Only
neutralization of HPV16 depended on the time of tissue harvest. These data
should inform attempts to produce a second-generation, L2-based vaccine.
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Affiliation(s)
- Michael J. Conway
- Department of Microbiology and Immunology, The
Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United
States of America
| | - Linda Cruz
- Department of Microbiology and Immunology, The
Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United
States of America
| | - Samina Alam
- Department of Microbiology and Immunology, The
Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United
States of America
| | - Neil David Christensen
- Department of Pathology, The Pennsylvania
State University College of Medicine, Hershey, Pennsylvania, United States of
America
| | - Craig Meyers
- Department of Microbiology and Immunology, The
Pennsylvania State University College of Medicine, Hershey, Pennsylvania, United
States of America
- * E-mail:
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33
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Chen HS, Bromberg-White J, Conway MJ, Alam S, Meyers C. Study of infectious virus production from HPV18/16 capsid chimeras. Virology 2010; 405:289-99. [PMID: 20598725 DOI: 10.1016/j.virol.2010.05.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 05/13/2010] [Accepted: 05/17/2010] [Indexed: 01/25/2023]
Abstract
Using the HPV18 genome as the backbone, we exchanged the HPV18 L2 or L1 genes with those of HPV16. The intertypical exchange of HPV18 L1 with the HPV16 L1 produced genomes that efficiently replicated and produced infectious virus. Genomes containing an intertypical exchange of HPV18 L2 for the HPV16 L2 failed to produce infectious virus in multiple independently derived cell lines. Using chimeric constructs of individual capsid proteins, we identified a type-specific domain at the N-terminus of the HPV18L1 capsid protein, which interferes with its ability to cooperate with the HPV16 L2 protein to form infectious viral particles. Deletion of this domain allows for the cooperation of the HPV18 L1 protein and HPV16 L2 protein and production of infectious progeny. In addition, cooperation of this N-terminal HPV18 L1 deletion mutant protein with the wild-type HPV18 L2 protein efficiently replicates infectious virus but changes occur in the viral structure.
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Affiliation(s)
- Horng-Shen Chen
- Department of Microbiology and Immunology H107, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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34
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Conway MJ, Alam S, Christensen ND, Meyers C. Overlapping and independent structural roles for human papillomavirus type 16 L2 conserved cysteines. Virology 2009; 393:295-303. [PMID: 19733888 DOI: 10.1016/j.virol.2009.08.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 07/28/2009] [Accepted: 08/05/2009] [Indexed: 12/17/2022]
Abstract
Cryoelectron microscopy images of HPV16 pseudovirions (PsV) depict that each pentamer of L1 can be occluded with a monomer of L2. Further research suggests that an N-terminal external loop of L2 exists, which is the target of neutralizing and cross-neutralizing antibodies. Here we show that N-terminal L2 cysteine residues, Cys22 and Cys28, have overlapping and independent structural roles, which affect both early- and late-stage assembly events. Substitution of either cysteine residue enhances infectivity markedly in comparison to wild-type HPV16. However, only Cys22Ser 20-day virions become nearly as stable as wild type. In addition, Cys22Ser, and Cys22,28Ser 20-day virions have lost their susceptibility to neutralization by anti-L2 antibodies, whereas Cys28Ser 20-day virions remain partially susceptible. These results suggest that Cys28 is necessary for late-stage stabilization of capsids, while Cys22 is necessary for proper display of L2 neutralizing epitopes.
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Affiliation(s)
- Michael J Conway
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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35
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Tissue-spanning redox gradient-dependent assembly of native human papillomavirus type 16 virions. J Virol 2009; 83:10515-26. [PMID: 19656879 DOI: 10.1128/jvi.00731-09] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Papillomavirus capsids are composed of 72 pentamers reinforced through inter- and intrapentameric disulfide bonds. Recent research suggests that virus-like particles and pseudovirions (PsV) can undergo a redox-dependent conformational change involving disulfide interactions. We present here evidence that native virions exploit a tissue-spanning redox gradient that facilitates assembly events in the context of the complete papillomavirus life cycle. DNA encapsidation and infectivity titers are redox dependent in that they can be temporally modulated via treatment of organotypic cultures with oxidized glutathione. These data provide evidence that papillomavirus assembly and maturation is redox-dependent, utilizing multiple steps within both suprabasal and cornified layers.
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36
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Adeno-associated virus type 2 induces apoptosis in human papillomavirus-infected cell lines but not in normal keratinocytes. J Virol 2009; 83:10286-92. [PMID: 19625406 DOI: 10.1128/jvi.00343-09] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The results of seroepidemiological studies suggest that infection with adeno-associated virus type 2 (AAV2) is negatively correlated with the incidence of human papillomavirus (HPV)-associated cervical cancer. We studied the potential of AAV2 oncosuppression of HPV and showed that HPV/AAV2 coinfection of cells culminated in apoptotic death, as determined by DNA laddering and caspase-3 cleavage. The induction of apoptosis coincided with AAV2 Rep protein expression; increased S-phase progression; upregulated pRb displaying both hyper- and hypophosphorylated forms; increased levels of p21(WAF1), p16(INK4), and p27(KIP1) proteins; and diminished levels of E7 oncoprotein. In contrast, normal keratinocytes that were infected with AAV2 or transfected with the cloned full-length AAV2 genome failed to express Rep proteins or undergo apoptosis. The failure of AAV2 to productively infect normal keratinocytes could be clinically advantageous. The delineation of the molecular mechanisms underlying the HPV/AAV2 interaction could be harnessed for developing novel AAV2-derived therapeutics for cervical cancer.
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37
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Abstract
Human papillomaviruses (HPVs) are small dsDNA tumor viruses, which are the etiologic agents of most cervical cancers and are associated with a growing percentage of oropharyngeal cancers. The HPV capsid is non-enveloped, having a T=7 icosahedral symmetry formed via the interaction among 72 pentamers of the major capsid protein, L1. The minor capsid protein L2 associates with L1 pentamers, although it is not known if each L1 pentamer contains a single L2 protein. The HPV life cycle strictly adheres to the host cell differentiation program, and as such, native HPV virions are only produced in vivo or in organotypic "raft" culture. Research producing synthetic papillomavirus particles--such as virus-like particles (VLPs), papillomavirus-based gene transfer vectors, known as pseudovirions (PsV), and papillomavirus genome-containing quasivirions (QV)--has bypassed the need for stratifying and differentiating host tissue in viral assembly and has allowed for the rapid analysis of HPV infectivity pathways, transmission, immunogenicity, and viral structure.
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Affiliation(s)
- M J Conway
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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38
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Lin Z, Yemelyanova AV, Gambhira R, Jagu S, Meyers C, Kirnbauer R, Ronnett BM, Gravitt PE, Roden RBS. Expression pattern and subcellular localization of human papillomavirus minor capsid protein L2. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 174:136-43. [PMID: 19095951 DOI: 10.2353/ajpath.2009.080588] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The expression pattern of human papillomavirus (HPV) capsid antigen L2 is poorly described, and the significance of its localization with both promyelocytic leukemia protein (PML) and Daxx in a subnuclear domain, nuclear domain 10 (ND-10), when ectopically expressed in tissue culture cells is controversial. To address whether ND-10 localization of L2 occurs in natural cervical lesions, we used a HPV16 and HPV18 L2-specific monoclonal antibody (RG-1), in addition to rabbit antiserum to HPV6 L2, to localize L2. Immunohistochemical staining with RG-1 produced diffuse staining in the nuclei of some cells located within the superficial epithelial layers in eight of nine cases of HPV16/18(+) cervical intraepithelial neoplasia grade 1 (CIN1); however, no staining was observed in HPV16/18(+) high-grade CIN (0 of 8 cases), normal cervical epithelium (0 of 20 cases), cervical squamous cell carcinoma (0 of 102 cases), adenocarcinoma (0 of 51 cases), or adenosquamous carcinoma (0 of 6 cases). HPV16/18(+) cervical lesions that express L2 exhibit higher HPV16/18 genome copies per cell compared with those that do not positively stain with RG-1 (P = 0.04). RG-1 staining of HeLa cells transfected with L2 expression constructs was frequently concentrated in the ND-10, particularly in cells expressing high levels of L2, and co-localized with the cellular markers of ND-10, PML, and Daxx. In contrast, L2 was primarily diffuse within the nucleus and distinct from ND-10 as defined by PML immunofluorescent staining in CIN lesions, condylomata, and HPV16-transduced organotypic cultures.
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Affiliation(s)
- Zhenhua Lin
- Department of Pathology, Johns Hopkins University Medical Institutions, Baltimore, Maryland, USA
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39
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Aberrant expression of oncogenic and tumor-suppressive microRNAs in cervical cancer is required for cancer cell growth. PLoS One 2008. [PMID: 18596939 DOI: 10.1271/journal.pone.0002557] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
MicroRNAs (miRNAs) play important roles in cancer development. By cloning and sequencing of a HPV16(+) CaSki cell small RNA library, we isolated 174 miRNAs (including the novel miR-193c) which could be grouped into 46 different miRNA species, with miR-21, miR-24, miR-27a, and miR-205 being most abundant. We chose for further study 10 miRNAs according to their cloning frequency and associated their levels in 10 cervical cancer- or cervical intraepithelial neoplasia-derived cell lines. No correlation was observed between their expression with the presence or absence of an integrated or episomal HPV genome. All cell lines examined contained no detectable miR-143 and miR-145. HPV-infected cell lines expressed a different set of miRNAs when grown in organotypic raft cultured as compared to monolayer cell culture, including expression of miR-143 and miR-145. This suggests a correlation between miRNA expression and tissue differentiation. Using miRNA array analyses for age-matched normal cervix and cervical cancer tissues, in combination with northern blot verification, we identified significantly deregulated miRNAs in cervical cancer tissues, with miR-126, miR-143, and miR-145 downregulation and miR-15b, miR-16, miR-146a, and miR-155 upregulation. Functional studies showed that both miR-143 and miR-145 are suppressive to cell growth. When introduced into cell lines, miR-146a was found to promote cell proliferation. Collectively, our data indicate that downregulation of miR-143 and miR-145 and upregulation of miR-146a play a role in cervical carcinogenesis.
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Wang X, Tang S, Le SY, Lu R, Rader JS, Meyers C, Zheng ZM. Aberrant expression of oncogenic and tumor-suppressive microRNAs in cervical cancer is required for cancer cell growth. PLoS One 2008; 3:e2557. [PMID: 18596939 PMCID: PMC2438475 DOI: 10.1371/journal.pone.0002557] [Citation(s) in RCA: 546] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Accepted: 05/13/2008] [Indexed: 12/31/2022] Open
Abstract
MicroRNAs (miRNAs) play important roles in cancer development. By cloning and sequencing of a HPV16(+) CaSki cell small RNA library, we isolated 174 miRNAs (including the novel miR-193c) which could be grouped into 46 different miRNA species, with miR-21, miR-24, miR-27a, and miR-205 being most abundant. We chose for further study 10 miRNAs according to their cloning frequency and associated their levels in 10 cervical cancer- or cervical intraepithelial neoplasia-derived cell lines. No correlation was observed between their expression with the presence or absence of an integrated or episomal HPV genome. All cell lines examined contained no detectable miR-143 and miR-145. HPV-infected cell lines expressed a different set of miRNAs when grown in organotypic raft cultured as compared to monolayer cell culture, including expression of miR-143 and miR-145. This suggests a correlation between miRNA expression and tissue differentiation. Using miRNA array analyses for age-matched normal cervix and cervical cancer tissues, in combination with northern blot verification, we identified significantly deregulated miRNAs in cervical cancer tissues, with miR-126, miR-143, and miR-145 downregulation and miR-15b, miR-16, miR-146a, and miR-155 upregulation. Functional studies showed that both miR-143 and miR-145 are suppressive to cell growth. When introduced into cell lines, miR-146a was found to promote cell proliferation. Collectively, our data indicate that downregulation of miR-143 and miR-145 and upregulation of miR-146a play a role in cervical carcinogenesis.
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Affiliation(s)
- Xiaohong Wang
- HIV and AIDS Malignancy Branch, Center for Cancer Research, Nation Cancer Institute (NCI)/National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Shuang Tang
- HIV and AIDS Malignancy Branch, Center for Cancer Research, Nation Cancer Institute (NCI)/National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Shu-Yun Le
- Nanobiology Program, Center for Cancer Research, Nation Cancer Institute (NCI)/National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Robert Lu
- HIV and AIDS Malignancy Branch, Center for Cancer Research, Nation Cancer Institute (NCI)/National Institutes of Health (NIH), Bethesda, Maryland, United States of America
| | - Janet S. Rader
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Craig Meyers
- Department of Microbiology and Immunology, Penn State University College of Medicine, Hershey, Pennsylvania, United States of America
| | - Zhi-Ming Zheng
- HIV and AIDS Malignancy Branch, Center for Cancer Research, Nation Cancer Institute (NCI)/National Institutes of Health (NIH), Bethesda, Maryland, United States of America
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Abstract
Papillomaviruses are a family of nonenveloped DNA tumor viruses. Some sexually transmitted human papillomavirus (HPV) types, including HPV type 16 (HPV16), cause cancer of the uterine cervix. Papillomaviruses encode two capsid proteins, L1 and L2. The major capsid protein, L1, can assemble spontaneously into a 72-pentamer icosahedral structure that closely resembles native virions. Although the minor capsid protein, L2, is not required for capsid formation, it is thought to participate in encapsidation of the viral genome and plays a number of essential roles in the viral infectious entry pathway. The abundance of L2 and its arrangement within the virion remain unclear. To address these questions, we developed methods for serial propagation of infectious HPV16 capsids (pseudoviruses) in cultured human cell lines. Biochemical analysis of capsid preparations produced using various methods showed that up to 72 molecules of L2 can be incorporated per capsid. Cryoelectron microscopy and image reconstruction analysis of purified capsids revealed an icosahedrally ordered L2-specific density beneath the axial lumen of each L1 capsomer. The relatively close proximity of these L2 density buttons to one another raised the possibility of homotypic L2 interactions within assembled virions. The concept that the N and C termini of neighboring L2 molecules can be closely apposed within the capsid was supported using bimolecular fluorescence complementation or "split GFP" technology. This structural information should facilitate investigation of L2 function during the assembly and entry phases of the papillomavirus life cycle.
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Wang X, Li B, Zhao KN. Differential expression of papillomavirus L1 proteins encoded by authentic and codon modified L1 genes in methylcellulose-treated mouse keratinocytes. Virol J 2007; 4:127. [PMID: 18036255 PMCID: PMC2233611 DOI: 10.1186/1743-422x-4-127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2007] [Accepted: 11/25/2007] [Indexed: 12/01/2022] Open
Abstract
Papillomaviruses (PVs) are double-stranded DNA viruses that infect keratinocytes in differentiating epithelia and induce hyperproliferative lesions. Here, we used methylcellulose to induce cell differentiation of primary mouse keratinocytes (KCs) in in vitro culture and assessed the expression of authentic and codon-modified version of L1 capsid genes from two PV types (HPV6b and BPV1). Based on the quantitative RT-PCR analysis, methylcellulose treatment did not influence the transcriptional expression of both authentic and codon-modified L1 genes in KCs. Western blot showed that methylcellulose significantly increased the levels of the L1 proteins expressed from two authentic L1 genes. Conversely, methylcellulose dramatically decreased L1 protein expression in KCs transfected with two codon-modified L1 expression constructs. These data suggest that L1 protein expression is associated with KC differentiation induced by methylcellulose treatment and regulated at the post-transcriptional level.
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Affiliation(s)
- Xiao Wang
- Diamantina Institute for Cancer, Immunology & Metabolic Medicine, University of Queensland, Research Extension, Building 1, Princess Alexandra Hospital, Woolloongabba, Queensland 4102, Australia.
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The cigarette smoke carcinogen benzo[a]pyrene enhances human papillomavirus synthesis. J Virol 2007; 82:1053-8. [PMID: 17989183 DOI: 10.1128/jvi.01813-07] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Epidemiological studies suggest that cigarette smoke carcinogens are cofactors which synergize with human papillomavirus (HPV) to increase the risk of cervical cancer progression. Benzo[a]pyrene (BaP), a major carcinogen in cigarette smoke, is detected in the cervical mucus and may interact with HPV. Exposure of cervical cells to high concentrations of BaP resulted in a 10-fold increase in HPV type 31 (HPV31) viral titers, whereas treatment with low concentrations of BaP resulted in an increased number of HPV genome copies but not an increase in virion morphogenesis. BaP exposure also increased HPV16 and HPV18 viral titers. Overall, BaP modulation of the HPV life cycle could potentially enhance viral persistence, host tissue carcinogenesis, and permissiveness for cancer progression.
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Andrei G. Three-dimensional culture models for human viral diseases and antiviral drug development. Antiviral Res 2006; 71:96-107. [PMID: 16844237 DOI: 10.1016/j.antiviral.2006.05.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 05/30/2006] [Accepted: 05/31/2006] [Indexed: 10/24/2022]
Abstract
Researchers are recognizing the limitations of two-dimensional (2D) cell cultures, given the fact that they do not reproduce the morphology and biochemical features that the cells possess in the original tissue. As an alternative, the three-dimensional (3D) cell culture approach offers researchers the possibility to study cell growth and differentiation under conditions that more closely resemble the in vivo situation with regard to cell shape and cellular environment. Currently, 3D culture models are being employed in many areas of biomedical research because they offer a more realistic milieu than 2D cultures. The era of 2D culture techniques is moving towards a new epoch of culture systems in 3D. The present review is focused on topics of research on 3D cell cultures in virology and their use in antiviral drug development.
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Drubin DA, McLaughlin-Drubin ME, Clawson GA, Meyers C. A Protease Inhibitor Specifically Inhibits Growth of HPV-Infected Keratinocytes. Mol Ther 2006; 13:1142-8. [PMID: 16564747 DOI: 10.1016/j.ymthe.2006.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Revised: 07/07/2005] [Accepted: 08/31/2005] [Indexed: 11/23/2022] Open
Abstract
Protease inhibitors have been known to exhibit anticarcinogenic activity in a variety of model systems, although the biological target(s) and mechanism remain enigmatic. Human papillomavirus (HPV) is the primary etiological agent of cervical cancer. Here we show that a nuclear chymotrypsin-like protease activity (NCLPA), which appears to be involved in transformation in several different experimental models, is significantly elevated in keratinocytes infected with high-risk HPV. Further, we demonstrate a marked growth inhibition of organotypic raft cultures, which is specific for cells infected with high-risk HPV types, using a chloromethyl ketone inhibitor previously shown to be relatively selective for the NCLPA. Surprisingly, this HPV-dependent inhibitory effect is independent of any alterations in the NCLPA. This finding has clear implications for the development of novel therapeutics specifically targeted to cervical dysplasias with HPV-infected cells.
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Affiliation(s)
- David A Drubin
- The Jake Gittlen Cancer Research Institute, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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Fang L, Meyers C, Budgeon LR, Howett MK. Induction of productive human papillomavirus type 11 life cycle in epithelial cells grown in organotypic raft cultures. Virology 2006; 347:28-35. [PMID: 16460777 DOI: 10.1016/j.virol.2005.10.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Revised: 06/28/2005] [Accepted: 10/17/2005] [Indexed: 11/16/2022]
Abstract
The study of the human papillomavirus (HPV) life cycle was hampered for more than 50 years by the lack of a conventional cell culture system for propagating HPV. Considerable progress has been made in the production of several HPV types using either organotypic rafts or human epithelial xenografts in immunocompromised mice. In this study, we demonstrated episomal maintenance of HPV-11 DNA in N-Tert cells. HPV-11 episomal DNA containing cell populations grown in raft culture showed induction of the productive viral life cycle. HPV-11 DNA amplification and viral capsid antigen synthesis were detected in differentiated layers of epithelia. The viruses generated were able to infect keratinocytes in vitro, which indicate that viruses generated were infectious. The demonstration of the productive HPV-11 life cycle in raft culture from cloned HPV-11 DNA will facilitate genetic analyses of viral gene functions that was not possible using the human xenograft athymic mouse model.
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Affiliation(s)
- L Fang
- Department of Bioscience and Biotechnology, Drexel University, 3141 Chestnut Street, Stratton Hall, Rm 118, Philadelphia, PA 19104, USA
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McLaughlin-Drubin ME, Bromberg-White JL, Meyers C. The role of the human papillomavirus type 18 E7 oncoprotein during the complete viral life cycle. Virology 2005; 338:61-8. [PMID: 15921717 DOI: 10.1016/j.virol.2005.04.036] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Revised: 03/08/2005] [Accepted: 04/21/2005] [Indexed: 11/23/2022]
Abstract
The role of the human papillomavirus oncoprotein E7 in carcinogenesis has been extensively studied. While the role of HPV E7 in the viral life cycle has also been studied, certain disparities exist, indicating that genotype differences may influence the role that E7 plays in the viral life cycle. In this study, we investigated the role of HPV18 E7 in the viral life cycle in order to gain a further understanding of this issue. To determine the role that HPV18 E7 plays in the viral life cycle, a translation termination substitution mutant of E7 in the context of the full HPV18 genome was created. We introduced linearized HPV18 E7-deficient genomic DNA into primary keratinocytes, where it recircularized and was maintained episomally at a range of five to several hundred copies of HPV genomic DNA. The mutant genomes failed to amplify following epithelial stratification and differentiation in organotypic culture. Moreover, virion morphogenesis did not occur. We found that the expression of HPV16 or HPV18 E7 in trans was able to rescue the amplification defect but not the defect in virion morphogenesis. These studies indicate that HPV18 E7 plays a critical role in the productive stage of the viral life cycle. In addition, these studies add further proof to the hypothesis that genotype differences exist for the role of E7 during the viral life cycle.
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Affiliation(s)
- Margaret E McLaughlin-Drubin
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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Pyeon D, Lambert PF, Ahlquist P. Production of infectious human papillomavirus independently of viral replication and epithelial cell differentiation. Proc Natl Acad Sci U S A 2005; 102:9311-6. [PMID: 15958530 PMCID: PMC1166641 DOI: 10.1073/pnas.0504020102] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Papillomaviruses are small DNA viruses that are associated with benign and malignant epithelial lesions, including >95% of cervical cancers and approximately 20% of head and neck cancers. Because papillomavirus replication and virion production are tied to epithelial cell differentiation, infectious papillomavirus virion production has been limited to cumbersome organotypic cultures and mouse xenografts. Consequent difficulties in obtaining useful amounts of wild-type or mutant human papillomavirus (HPV) virions have greatly limited studies on many aspects of papillomavirus biology. To overcome these limitations, we developed a system to encapsidate the full-length papillomaviral genome into infectious virions, independently of viral DNA replication and epithelial differentiation. This transient-transfection-based system produces >1,000 times more infectious virus per cell culture dish than the much more labor-intensive organotypic culture. Furthermore, we show that this method allows the facile generation of infectious particles containing wild-type, mutant, or chimeric papillomaviral genomes, overcoming barriers to studying many facets of replication, host interactions, and vaccine and drug development, which has been limited by the insufficient availability of infectious virions.
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Affiliation(s)
- Dohun Pyeon
- McArdle Laboratory for Cancer Research, Institute for Molecular Virology, University of Wisconsin, Madison, WI 53706, USA
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Poland GA, Jacobson RM, Koutsky LA, Tamms GM, Railkar R, Smith JF, Bryan JT, Cavanaugh PF, Jansen KU, Barr E. Immunogenicity and reactogenicity of a novel vaccine for human papillomavirus 16: a 2-year randomized controlled clinical trial. Mayo Clin Proc 2005; 80:601-10. [PMID: 15887427 DOI: 10.4065/80.5.601] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To evaluate the immunogenicity, reactogenicity, and tolerability of a prototype human papillomavirus (HPV) 16 viruslike particle (VLP) vaccine directed against the L1 capsid protein. SUBJECTS AND METHODS We enrolled healthy nonpregnant women aged 18 to 26 years into a 2-year, double-blind, dose-ranging multicenter trial (October 12, 1998, to September 30, 2001). Subjects were assigned to study groups to receive a 3-dose regimen (day 0, month 2, and month 6) of 1 of 4 vaccine doses: 10 microg, 20 microg, 40 microg, or 80 microg or placebo. Serum anti-HPV 16 L1 antibody (sL1Ab) geometric mean titers (GMTs) were measured at day 0, at month 3, at month 7, and every 6 months for a total of 2 years using a radioimmunoassay. The primary immunogenicity analyses evaluated GMTs at month 7 in L1Ab-seronegative subjects at baseline. Vaccine tolerability was also assessed. RESULTS A total of 480 subjects were randomized to receive placebo (n=52) or 10 microg (n=112), 20 microg (n=105), 40 microg (n=104), or 80 microg (n=107) of HPV 16 L1 VLP vaccine. At baseline, 75% of subjects were L1Ab seronegative. All vaccine doses produced a statistically significant sL1Ab response vs placebo (P<.001). At the completion of the vaccination regimen, sL1Ab GMTs in baseline-seronegative subjects were 36- to 78-fold higher than the sL1Ab GMT at day 0 observed in subjects who had mounted an immune response to HPV 16 infection before enrollment. Serum L1Ab GMTs remained high throughout the 1.5-year postvaccination period. Postvaccination sL1Ab GMTs were 1.1- to 2.4-fold higher in women who had detectable sL1Ab levels at enrollment compared with those in baseline-seronegative subjects, particularly in the persistence phase. The vaccine was generally well tolerated with no statistically significant differences in injection site or systemic adverse experiences among treatment groups. CONCLUSION Immunization with this novel HPV 16 L1 VLP vaccine was well tolerated and produced an immunogenic response that persisted for at least 1.5 years after the final dose.
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Affiliation(s)
- Gregory A Poland
- Division of General Internal Medicine, Mayo Vaccine Research Group, Mayo Clinic College of Medicine, 200 First St SW, Rochester, MN 55905, USA.
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