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Cacciotto C, Dore GM, Cubeddu T, Burrai GP, Anfossi AG, Antuofermo E, Varoni MV, Demontis MP, Zobba R, Pittau M, Müller M, Alberti A. Ovine papillomavirus type 3 virus-like particle-based tools for diagnosis and detection of infection. Vaccine 2024; 42:126033. [PMID: 38839520 DOI: 10.1016/j.vaccine.2024.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/03/2024] [Accepted: 06/01/2024] [Indexed: 06/07/2024]
Abstract
The design of prophylactic and diagnostic tools specific to animal papillomaviruses is hampered by the difficulties of viral in vitro manipulation and by the scarce availability of dedicated biotechnological tools. This paper reports the production of Ovine Papillomavirus 3 (OaPV3)-based virus-like particles (OaPV3-VLPs) in the baculovirus system and their use to investigate host humoral immune response through the establishment of an indirect ELISA test., Polyclonal sera and monoclonal antibodies were generated against OaPV3-VLPs, and their isotype and reactivity were determined. Additionally, antibodies allowed OaPV3 detection in ovine squamous cell carcinoma (SCC) samples by immunohistochemistry. Results encourage the standardization of OaPV3-specific prophylactic and serological diagnostic tools, and open new perspectives for the study of host-viral interaction and SCC development.
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Affiliation(s)
- Carla Cacciotto
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy
| | - Gian Mario Dore
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy
| | - Tiziana Cubeddu
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy
| | - Giovanni Pietro Burrai
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy
| | | | - Elisabetta Antuofermo
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy
| | - Maria Vittoria Varoni
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy
| | - Maria Piera Demontis
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy
| | - Rosanna Zobba
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy
| | - Marco Pittau
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy
| | | | - Alberto Alberti
- Università degli Studi di Sassari, Dipartimento di Medicina Veterinaria, Sassari, Italy; Mediterranean Center for Disease Control, Sassari, Italy.
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Paietta EN, Kraberger S, Regney M, Custer JM, Ehmke E, Yoder AD, Varsani A. Interspecies Papillomavirus Type Infection and a Novel Papillomavirus Type in Red Ruffed Lemurs ( Varecia rubra). Viruses 2023; 16:37. [PMID: 38257737 PMCID: PMC10818365 DOI: 10.3390/v16010037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 12/16/2023] [Accepted: 12/20/2023] [Indexed: 01/24/2024] Open
Abstract
The Papillomaviridae are a family of vertebrate-infecting viruses of oncogenic potential generally thought to be host species- and tissue-specific. Despite their phylogenetic relatedness to humans, there is a scarcity of data on papillomaviruses (PVs) in speciose non-human primate lineages, particularly the lemuriform primates. Varecia variegata (black-and-white ruffed lemurs) and Varecia rubra (red ruffed lemurs), two closely related species comprising the Varecia genus, are critically endangered with large global captive populations. Varecia variegata papillomavirus (VavPV) types -1 and -2, the first PVs in lemurs with a fully identified genome, were previously characterized from captive V. variegata saliva. To build upon this discovery, saliva samples were collected from captive V. rubra with the following aims: (1) to identify PVs shared between V. variegata and V. rubra and (2) to characterize novel PVs in V. rubra to better understand PV diversity in the lemuriform primates. Three complete PV genomes were determined from V. rubra samples. Two of these PV genomes share 98% L1 nucleotide identity with VavPV2, denoting interspecies infection of V. rubra by VavPV2. This work represents the first reported case of interspecies PV infection amongst the strepsirrhine primates. The third PV genome shares <68% L1 nucleotide identity with that of all PVs. Thus, it represents a new PV species and has been named Varecia rubra papillomavirus 1 (VarPV1). VavPV1, VavPV2, and VarPV1 form a new clade within the Papillomaviridae family, likely representing a novel genus. Future work diversifying sample collection (i.e., lemur host species from multiple genera, sample type, geographic location, and wild populations) is likely to uncover a world of diverse lemur PVs.
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Affiliation(s)
| | - Simona Kraberger
- The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (S.K.); (M.R.); (J.M.C.)
| | - Melanie Regney
- The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (S.K.); (M.R.); (J.M.C.)
| | - Joy M. Custer
- The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (S.K.); (M.R.); (J.M.C.)
| | - Erin Ehmke
- Duke Lemur Center, Durham, NC 27705, USA;
| | - Anne D. Yoder
- Department of Biology, Duke University, Durham, NC 27708, USA;
| | - Arvind Varsani
- The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA; (S.K.); (M.R.); (J.M.C.)
- Structural Biology Research Unit, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town 7925, South Africa
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3
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Development of immunodiagnostic tools for in situ investigation of Ovis aries papillomavirus 3 (OaPV3). Vet Res Commun 2022; 47:641-649. [DOI: 10.1007/s11259-022-10018-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
Abstract
AbstractCutaneous squamous cell carcinoma (cSCC) is a malignant lesion characterized by proliferation and transformation of keratinocytes in the epidermis and infiltrating derma. cSCC is reported in domestic and wild animal species, worldwide. The occurrence and development of cSCC rely on synergic multifactorial conditions, most importantly sunlight exposure and Papillomavirus (PV) infection. In sheep, the development of such lesions represents a threat both to animal welfare and milk production. Ovis aries papillomavirus 3 (OaPV3) is the main cSCC viral determinant and oncogenic properties of viral E6 and E7 proteins were preliminarily investigated. However, E6 and E7 role and mechanisms resulting in cSCC have not been fully clarified, mainly due to the lack specific immunological tools, such as antibodies for in situ detection of ovine papillomavirus. This paper reports the development of specific serological tools for the investigation of OaPV3 pathogenicity, and their preliminary use to screen 4 ovine cSSC formalin-fixed paraffin embedded tissues. Relevance of immunological tools to investigation of viral biological properties and diagnosis are also discussed.
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Steenkamp G, Tordiffe ASW, Suleman E, Oosthuizen A, Brettschneider H, Boy SC. Sublingual papillomas of cheetahs in southern Africa. Vet Pathol 2022; 59:997-1002. [PMID: 35815910 DOI: 10.1177/03009858221109610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nine distinct papillomaviruses (Lambdapapillomavirus) have been described in domestic and nondomestic cats, but not in cheetahs. These viruses have been associated with cutaneous papillomas or plaques, bowenoid in situ carcinomas, feline cutaneous squamous cell carcinomas (SCC), feline sarcoids, and oral (often sublingual) papillomas. Fourteen cheetahs from the AfriCat foundation (Namibia) and one from the Ann van Dyk Cheetah center (South Africa) presented with sublingual lesions reminiscent of sublingual papillomas. Two animals were biopsied and the histopathology revealed benign proliferative epithelial lesions with prominent thickening of the overlying squamous epithelium. Throughout the squamous epithelial layers were cells with nuclear enlargement, irregularity of the nuclear membranes and cell contours, focal hyperchromasia of the nuclei, and perinuclear halos, reminiscent of a virus-associated process as seen in papillomavirus infections. Thirteen more cheetahs were sampled and the tissue snap frozen for molecular characterization. Amplification and sequencing of the papillomavirus L1, E6, E7, and E1 gene regions was achieved with modified primers. Maximum likelihood phylogenetic analyses revealed all 15 cheetah papilloma samples were 99.99% genetically similar and closely related to, but genetically distinct from any known felinepapillomaviruses. All cheetahs were FIV and FeLV negative. The results suggest the samples identified in this study can be considered a previously undescribed or novel feline papillomavirus and the authors propose "Acinonyx jubatus papillomavirus type 1" (AjPV-1), within the Lambdapapillomavirus 1 genus (Family: Papillomaviridae).
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Affiliation(s)
- Gerhard Steenkamp
- University of Pretoria, Pretoria, South Africa.,University of Pretoria, Gauteng, South Africa
| | | | - Essa Suleman
- South African National Biodiversity Institute, Pretoria, South Africa.,Council for Scientific and Industrial Research, Pretoria, South Africa
| | - Almero Oosthuizen
- South African National Biodiversity Institute, Pretoria, South Africa.,ZooOmics™-Inqaba Biotec, Pretoria, South Africa
| | | | - Sonja C Boy
- Sefako Makgatho Health Sciences University, Gar-Rankuwa, South Africa.,Lancet Laboratories, Pretoria, South Africa
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Medeiros-Fonseca B, Abreu-Silva AL, Medeiros R, Oliveira PA, Gil da Costa RM. Pteridium spp. and Bovine Papillomavirus: Partners in Cancer. Front Vet Sci 2021; 8:758720. [PMID: 34796228 PMCID: PMC8593235 DOI: 10.3389/fvets.2021.758720] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 10/06/2021] [Indexed: 11/30/2022] Open
Abstract
Bovine papillomavirus (BPV) are a cause for global concern due to their wide distribution and the wide range of benign and malignant diseases they are able to induce. Those lesions include cutaneous and upper digestive papillomas, multiple histological types of urinary bladder cancers—most often associated with BPV1 and BPV2—and squamous cell carcinomas of the upper digestive system, associated with BPV4. Clinical, epidemiological and experimental evidence shows that exposure to bracken fern (Pteridium spp.) and other related ferns plays an important role in allowing viral persistence and promoting the malignant transformation of early viral lesions. This carcinogenic potential has been attributed to bracken illudane glycoside compounds with immune suppressive and mutagenic properties, such as ptaquiloside. This review addresses the role of BPV in tumorigenesis and its interactions with bracken illudane glycosides. Current data indicates that inactivation of cytotoxic T lymphocytes and natural killer cells by bracken fern illudanes plays a significant role in allowing viral persistence and lesion progression, while BPV drives unchecked cell proliferation and allows the accumulation of genetic damage caused by chemical mutagens. Despite limited progress in controlling bracken infestation in pasturelands, bracken toxins remain a threat to animal health. The number of recognized BPV types has steadily increased over the years and now reaches 24 genotypes with different pathogenic properties. It remains essential to widen the available knowledge concerning BPV and its synergistic interactions with bracken chemical carcinogens, in order to achieve satisfactory control of the livestock losses they induce worldwide.
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Affiliation(s)
- Beatriz Medeiros-Fonseca
- Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.,Veterinary Sciences Department, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Ana Lúcia Abreu-Silva
- Veterinary Sciences Department, State University of Maranhão (UEMA), São Luís, Brazil
| | - Rui Medeiros
- Molecular Oncology and Viral Pathology Group, Research Center of IPO Porto (CI-IPOP)/Rede de Investigação em Saúde (RISE)@CI-IPOP (Health Research Network), Portuguese Oncology Institute of Porto (IPO Porto)/Porto Comprehensive Cancer Center (Porto.CCC), Porto, Portugal.,Molecular Oncology and Viral Pathology Group, Faculty of Medicine, University of Porto, Porto, Portugal.,Biomedicine Research Center (CEBIMED), Faculty of Health Sciences, Fernando Pessoa University, Porto, Portugal.,Virology Service, Portuguese Institute of Oncology (IPO-Porto), Porto, Portugal
| | - Paula A Oliveira
- Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.,Veterinary Sciences Department, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Rui M Gil da Costa
- Centre for Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.,Molecular Oncology and Viral Pathology Group, Research Center of IPO Porto (CI-IPOP)/Rede de Investigação em Saúde (RISE)@CI-IPOP (Health Research Network), Portuguese Oncology Institute of Porto (IPO Porto)/Porto Comprehensive Cancer Center (Porto.CCC), Porto, Portugal.,LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal.,Post-graduate Programme in Adult Health (PPGSAD), Department of Morphology, Federal University of Maranhão (UFMA), UFMA University Hospital (HUUFMA), São Luís, Brazil
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6
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Papillomaviruses in Domestic Cats. Viruses 2021; 13:v13081664. [PMID: 34452528 PMCID: PMC8402708 DOI: 10.3390/v13081664] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/20/2021] [Accepted: 08/20/2021] [Indexed: 12/26/2022] Open
Abstract
Papillomaviruses (PVs) are well established to cause hyperplastic papillomas (warts) in humans and animals. In addition, due to their ability to alter cell regulation, PVs are also recognized to cause approximately 5% of human cancers and these viruses have been associated with neoplasia in a number of animal species. In contrast to other domestic species, cats have traditionally been thought to less frequently develop disease due to PV infection. However, in the last 15 years, the number of viruses and the different lesions associated with PVs in cats have greatly expanded. In this review, the PV life cycle and the subsequent immune response is briefly discussed along with methods used to investigate a PV etiology of a lesion. The seven PV types that are currently known to infect cats are reviewed. The lesions that have been associated with PV infections in cats are then discussed and the review finishes with a brief discussion on the use of vaccines to prevent PV-induced disease in domestic cats.
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7
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Novel Production of Bovine Papillomavirus Pseudovirions in Tobacco Plants. Pathogens 2020; 9:pathogens9120996. [PMID: 33260725 PMCID: PMC7760623 DOI: 10.3390/pathogens9120996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/22/2020] [Accepted: 11/22/2020] [Indexed: 11/17/2022] Open
Abstract
Vaccine efficacy requires the production of neutralising antibodies which offer protection against the native virus. The current gold standard for determining the presence of neutralising antibodies is the pseudovirion-based neutralisation assay (PBNA). PBNAs utilise pseudovirions (PsVs), structures which mimic native virus capsids, but contain non-viral nucleic material. PsVs are currently produced in expensive cell culture systems, which limits their production, yet plant expression systems may offer cheaper, safer alternatives. Our aim was to determine whether plants could be used for the production of functional PsVs of bovine papillomavirus 1 (BPV1), an important causative agent of economically damaging bovine papillomas in cattle and equine sarcoids in horses and wild equids. BPV1 capsid proteins, L1 and L2, and a self-replicating reporter plasmid were transiently expressed in Nicotiana benthamiana to produce virus-like particles (VLPs) and PsVs. Strategies to enhance particle yields were investigated and optimised protocols were established. The PsVs' ability to infect mammalian cells and express their encapsidated reporter genes in vitro was confirmed, and their functionality as reagents in PBNAs was demonstrated through their neutralisation by several different antibodies. This is the first report of BPV PsVs expressed in plants and demonstrates the potential for the development of therapeutic veterinary vaccines in planta.
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Green J, Jakins C, Asfaw E, Bruschi N, Parker A, de Waal L, D’Cruze N. African Lions and Zoonotic Diseases: Implications for Commercial Lion Farms in South Africa. Animals (Basel) 2020; 10:ani10091692. [PMID: 32962130 PMCID: PMC7552683 DOI: 10.3390/ani10091692] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 12/30/2022] Open
Abstract
Simple Summary In South Africa, thousands of African lions are bred on farms for commercial purposes, such as tourism, trophy hunting, and traditional medicine. Lions on farms often have direct contact with people, such as farm workers and tourists. Such close contact between wild animals and humans creates opportunities for the spread of zoonotic diseases (diseases that can be passed between animals and people). To help understand the health risks associated with lion farms, our study compiled a list of pathogens (bacteria, viruses, parasites, and fungi) known to affect African lions. We reviewed 148 scientific papers and identified a total of 63 pathogens recorded in both wild and captive lions, most of which were parasites (35, 56%), followed by viruses (17, 27%) and bacteria (11, 17%). This included pathogens that can be passed from lions to other animals and to humans. We also found a total of 83 diseases and clinical symptoms associated with these pathogens. Given that pathogens and their associated infectious diseases can cause harm to both animals and public health, we recommend that the lion farming industry in South Africa takes action to prevent and manage potential disease outbreaks. Abstract African lions (Panthera leo) are bred in captivity on commercial farms across South Africa and often have close contact with farm staff, tourists, and other industry workers. As transmission of zoonotic diseases occurs through close proximity between wildlife and humans, these commercial captive breeding operations pose a potential risk to thousands of captive lions and to public health. An understanding of pathogens known to affect lions is needed to effectively assess the risk of disease emergence and transmission within the industry. Here, we conduct a systematic search of the academic literature, identifying 148 peer-reviewed studies, to summarize the range of pathogens and parasites known to affect African lions. A total of 63 pathogenic organisms were recorded, belonging to 35 genera across 30 taxonomic families. Over half were parasites (35, 56%), followed by viruses (17, 27%) and bacteria (11, 17%). A number of novel pathogens representing unidentified and undescribed species were also reported. Among the pathogenic inventory are species that can be transmitted from lions to other species, including humans. In addition, 83 clinical symptoms and diseases associated with these pathogens were identified. Given the risks posed by infectious diseases, this research highlights the potential public health risks associated with the captive breeding industry. We recommend that relevant authorities take imminent action to help prevent and manage the risks posed by zoonotic pathogens on lion farms.
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Affiliation(s)
- Jennah Green
- World Animal Protection 222 Gray’s Inn Rd., London WC1X 8HB, UK; (J.G.); (E.A.); (N.B.); (A.P.)
| | - Catherine Jakins
- Blood Lion NPC, P.O. Box 1548, Kloof 3640, South Africa; (C.J.); (L.d.W.)
| | - Eyob Asfaw
- World Animal Protection 222 Gray’s Inn Rd., London WC1X 8HB, UK; (J.G.); (E.A.); (N.B.); (A.P.)
| | - Nicholas Bruschi
- World Animal Protection 222 Gray’s Inn Rd., London WC1X 8HB, UK; (J.G.); (E.A.); (N.B.); (A.P.)
| | - Abbie Parker
- World Animal Protection 222 Gray’s Inn Rd., London WC1X 8HB, UK; (J.G.); (E.A.); (N.B.); (A.P.)
| | - Louise de Waal
- Blood Lion NPC, P.O. Box 1548, Kloof 3640, South Africa; (C.J.); (L.d.W.)
| | - Neil D’Cruze
- World Animal Protection 222 Gray’s Inn Rd., London WC1X 8HB, UK; (J.G.); (E.A.); (N.B.); (A.P.)
- Correspondence:
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Munday JS, Fairley R, Lowery I. Detection of Ovis aries papillomavirus type 2 DNA sequences in a sarcoid-like mass in the mouth of a pig. Vet Microbiol 2020; 248:108801. [PMID: 32827929 DOI: 10.1016/j.vetmic.2020.108801] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 07/18/2020] [Indexed: 10/23/2022]
Abstract
An oral mass was surgically excised from the gingiva of a pig. As the mass had a similar histological appearance to an equine sarcoid, DNA was extracted and consensus PCR primers used to amplify papillomavirus (PV) DNA. DNA sequences from Ovis aries papillomavirus (OaPV) type 2 were amplified both from a section of the entire mass as well as an area deeper within the mass away from the surface of the lesion. No other PV types were detected within the oral lesion. Ovis aries PV2 is a Delta PV that is closely related to the bovine Delta PVs that cause sarcoids in horses and cats. These results suggest that OaPV2 may be able to infect pigs and this virus could have caused the mesenchymal neoplasm in the mouth of this pig. This is the first evidence that a non-bovine PV can infect a non-host species and the first report of a sarcoid-like mass in pigs. These observations add to the range of species in which PV-associated neoplasia has been reported and suggest that cross-species infection by other Delta PV types may be possible.
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Affiliation(s)
- John S Munday
- School of Veterinary Science, Massey University, Palmerston North, New Zealand.
| | - Rob Fairley
- Gribbles Veterinary Pathology Ltd., Christchurch, New Zealand
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Bovine Papillomavirus 1 Gets Out of the Flock: Detection in an Ovine Wart in Sicily. Pathogens 2020; 9:pathogens9060429. [PMID: 32486181 PMCID: PMC7350338 DOI: 10.3390/pathogens9060429] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 02/06/2023] Open
Abstract
A proliferative cauliflower lesion was excised from the udder of a sheep. Histological investigation confirmed the macroscopic classification of the lesion as a papilloma, without any fibroblastic proliferation. PCR revealed the presence of bovine papillomavirus (BPV), which was further confirmed by the identification of a Deltapapillomavirus4 by Next Generation Sequencing analysis. This was subsequently classified as bovine papillomavirus type 1. Negative staining electron microscopy (EM) analyses produced negative test results for papillomavirus particles. RNA in situ hybridization (ISH) confirmed the presence of BPV-1. The results further confirm the ability of BPVs belonging to the Deltapapillomavirus genus to infect distantly related species and to cause lesions that are different from sarcoids.
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11
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Russo V, Roperto F, De Biase D, Cerino P, Urraro C, Munday JS, Roperto S. Bovine Papillomavirus Type 2 Infection Associated with Papillomatosis of the Amniotic Membrane in Water Buffaloes ( Bubalus bubalis). Pathogens 2020; 9:pathogens9040262. [PMID: 32260380 PMCID: PMC7238040 DOI: 10.3390/pathogens9040262] [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: 03/19/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 02/06/2023] Open
Abstract
Multiple papillomatous nodules were observed scattered over the amniotic membrane in six water buffaloes that had recently aborted. Grossly, some of the nodules had multiple villous projections while others appeared as single prominent conical or cylindrical horns. Histology revealed folded hyperplastic and hyperkeratotic epithelium supported by a narrow fibro-vascular stalk. Using PCR, sequences of the bovine Deltapapillomavirus type 2 (BPV-2) E5 gene were amplified from the amniotic papillomas. Furthermore, expression of the E5 gene was detected using reverse transcription (RT)-PCR. Western blotting revealed BPV-2 E5 oncoprotein as well as L1 protein, suggesting both abortive and productive infection. Additionally, a functional complex composed of BPV-2 E5 oncoprotein and the phosphorylated PDGFβR was detected, which is consistent with the activation of PDGFβR by the interaction with BPV-2 E5 oncoprotein. These results demonstrate that BPV-2 can infect the amnion of water buffaloes and suggest that this infection may cause proliferation of the epithelial cells of the amnion. While the precise pathogenesis in uncertain, it is possible that BPV-2 infection of stratified squamous epithelial cells within squamous metaplasia foci and/or amniotic plaques could lead to papilloma formation. Papillomavirus-associated amniotic papillomas have not previously been reported in any species, including humans.
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Affiliation(s)
- Valeria Russo
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli Federico II, 80137 Napoli, Italy; (V.R.); (D.D.B.); (C.U.)
| | - Franco Roperto
- Dipartimento di Biologia, Università degli Studi di Napoli Federico II, 80136 Napoli, Italy;
| | - Davide De Biase
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli Federico II, 80137 Napoli, Italy; (V.R.); (D.D.B.); (C.U.)
| | - Pellegrino Cerino
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, 80055 Portici (NA), Italy;
| | - Chiara Urraro
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli Federico II, 80137 Napoli, Italy; (V.R.); (D.D.B.); (C.U.)
| | - John S. Munday
- Pathobiology, School of Veterinary Sciences, Massey University, Palmerston North 4410, New Zealand;
| | - Sante Roperto
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università degli Studi di Napoli Federico II, 80137 Napoli, Italy; (V.R.); (D.D.B.); (C.U.)
- Correspondence: ; Tel.: +39-081-2536363
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12
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Roperto S, Russo V, De Falco F, Taulescu M, Roperto F. Congenital papillomavirus infection in cattle: Evidence for transplacental transmission. Vet Microbiol 2019; 230:95-100. [PMID: 30827412 DOI: 10.1016/j.vetmic.2019.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 02/03/2023]
Abstract
Vertical transmission of bovine papillomavirus (BPV) infection was investigated on livers and kidneys of four foetuses from cows suffering from BPV-2-associated urothelial cancers of the urinary bladder. PCR analysis revealed the presence of BPV-2 E5 DNA in the livers and kidneys of two foetuses. Amplified DNA fragments, composed of 502 bp, showed a 100% homology with BPV-2 sequences (GenBank accession number: M20219.1). BPV-2 was found to be transcriptionally active. Indeed, reverse transcriptase (RT)-PCR showed BPV-2 E5 transcripts. Sequencing of amplified cDNA, composed of 154 bp, showed a 100% identity with BPV-2 E5 sequences (GenBank accession number: M20219.1). Western blot analysis revealed the presence of dimers of E5 oncoprotein. Furthermore, a statistically significant increase of the phosphorylated (activated) form of the platelet-derived growth factor ß receptor (PDGFßR) was also detected in the fetal tissues. PDGFßR is believed to form the most important interaction with the E5 oncoprotein, thus regulating biological activity of virus protein. The strong concordance between virus found in fetal organs with virus detected in infected mothers provides evidence that BPV-2 can spread through blood and vertical infection occurs via transplacental transmission. Finally, molecular findings of this study raise unsolved questions about the potential role of BPVs in reproductive disorders. The presence of E5 oncoprotein, as in adult organs, may also activate the constitutive receptor PDGFßR in foetal organs, which plays a pivotal role in angiogenesis and embryonic development. Therefore, abnormal phosphorylation of PDGFßR may be involved in vascular and organogenesis abnormalities other than cancer.
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Affiliation(s)
- Sante Roperto
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy.
| | - Valeria Russo
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy
| | - Francesca De Falco
- Dipartimento di Medicina Veterinaria e Produzioni Animali, Università di Napoli Federico II, Napoli, Italy
| | - Marian Taulescu
- University of Agricultural Sciences and Veterinary Medicine, Faculty of Veterinary Medicine, Cluj-Napoca, Romania
| | - Franco Roperto
- Dipartimento di Biologia, Università di Napoli Federico II, Napoli, Italy
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Oral fibropapillomatosis and epidermal hyperplasia of the lip in newborn lambs associated with bovine Deltapapillomavirus. Sci Rep 2018; 8:13310. [PMID: 30190493 PMCID: PMC6127103 DOI: 10.1038/s41598-018-31529-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 08/21/2018] [Indexed: 12/20/2022] Open
Abstract
Congenital fibropapillomatosis of the gingiva and oral mucosa and epidermal hyperplasia of the lip are described, for the first time, in two newborn lambs. Expression of the E5 oncoprotein of bovine deltapapillomavirus types 2 (BPV-2) and -13 (BPV-13) was detected in both fibropapillomas and the hyperplastic epidermal cells suggesting the BPV infection was the cause of the proliferative lesions. No DNA sequences of BPV-1 and BPV-14 were detected. Both BPV-2 and BPV-13 DNA were also amplified from peripheral blood mononuclear cells (PBMCs) of the newborn lambs’ dams. The concordance between BPV genotypes detected in the blood of dam and the oral and skin pathological samples of their offspring suggests that a vertical hematogeneous transmission was most likely source of BPV infection. Immunoblotting revealed the presence of E5 dimers allowing the viral protein to be biologically active. E5 dimers bind and activate the platelet derived growth factor β receptor (PDGFβR), a major molecular mechanism contributing to disease. The detection of E5 protein within the proliferating cells therefore adds further evidence that the BPV infection was the cause of the proliferative lesions seen in these lambs. This is the first evidence of vertical transmission of BPVs in sheep resulting in a clinical disease.
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Daudt C, Da Silva FRC, Lunardi M, Alves CBDT, Weber MN, Cibulski SP, Alfieri AF, Alfieri AA, Canal CW. Papillomaviruses in ruminants: An update. Transbound Emerg Dis 2018; 65:1381-1395. [DOI: 10.1111/tbed.12868] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Indexed: 02/06/2023]
Affiliation(s)
- C. Daudt
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
- Centro de Ciências Biológicas e da Natureza; Universidade Federal do Acre; Rio Branco AC Brazil
| | - F. R. C. Da Silva
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
- Centro de Ciências Biológicas e da Natureza; Universidade Federal do Acre; Rio Branco AC Brazil
| | - M. Lunardi
- Laboratório de Virologia Animal; Departamento de Medicina Veterinária Preventiva; Universidade Estadual de Londrina; Londrina PR Brazil
- Laboratório de Microbiologia Veterinária; Hospital Escola Veterinário; Universidade de Cuiabá; Várzea Grande MT Brazil
| | - C. B. D. T. Alves
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - M. N. Weber
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - S. P. Cibulski
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - A. F. Alfieri
- Laboratório de Virologia Animal; Departamento de Medicina Veterinária Preventiva; Universidade Estadual de Londrina; Londrina PR Brazil
| | - A. A. Alfieri
- Laboratório de Virologia Animal; Departamento de Medicina Veterinária Preventiva; Universidade Estadual de Londrina; Londrina PR Brazil
- Laboratório Multiusuário em Saúde Animal; Unidade de Biologia Molecular; Universidade Estadual de Londrina; Londrina PR Brazil
| | - C. W. Canal
- Laboratório de Virologia Veterinária; Faculdade de Veterinária; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
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Roperto S, Russo V, Corrado F, Munday JS, De Falco F, Roperto F. Detection of bovine Deltapapillomavirus DNA in peripheral blood of healthy sheep (Ovis aries). Transbound Emerg Dis 2018; 65:758-764. [PMID: 29330926 DOI: 10.1111/tbed.12800] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Indexed: 12/13/2022]
Abstract
Blood samples from 65 sheep were tested for the presence of bovine Deltapapillomavirus (δPVs) DNA. The sheep were divided into three groups. Sheep in groups 1 and 2 were from Sardinia and Campania, respectively, and were in contact with cattle and grazed on lands contaminated with bracken fern. Sheep in Group 3 lived in closed pens and had no contact with cattle. These sheep were fed hay that did not contain bracken fern. Bovine δPV E5 DNA was detected in blood from 24 of 27 (89%) sheep in Group 1. A single bovine δPV type was detected in the blood from nine (33%) sheep, including the detection of bovine δPV-1 DNA in four sheep, bovine δPV-2 in four and δPV-13 in one sheep. Two δPV types were detected in 33% of the sheep, and three bovine δPV types were detected in 22% of the sheep. Bovine δPVs were detected in 17 of 20 (85%) sheep from Group 2. The detection rate by a single δPV type was 40% with just δPV-1 DNA amplified from two, just δPV-2 DNA from four, and just δPV-13 DNA from two sheep. Two and three δPVs were detected in 30% and 15%, respectively. All sequenced amplicons showed a 100% identity with papillomaviral E5 DNA deposited in GenBank. Bovine δPV-14 DNA sequences were not detected from any sheep. No bovine δPV DNA was revealed in blood samples from sheep in Group 3. The detection of bovine δPV DNA in the blood of sheep means that sheep may be able to be infected by these PVs. This suggests that bovine δPVs could potentially be a previously unrecognized cause of disease in sheep. Furthermore, it is possible that sheep could act as a reservoir for these viruses.
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Affiliation(s)
- S Roperto
- Dipartimento di Medicina Veterinaria e delle Produzioni Animali, Università di Napoli Federico II, Napoli, Italia
| | - V Russo
- Dipartimento di Medicina Veterinaria e delle Produzioni Animali, Università di Napoli Federico II, Napoli, Italia
| | - F Corrado
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici (Na), Italia
| | - J S Munday
- Pathobiology, Institute of Veterinary, Animal, and Biomedical Sciences, Massey University, Palmerston North, New Zealand
| | - F De Falco
- Dipartimento di Medicina Veterinaria e delle Produzioni Animali, Università di Napoli Federico II, Napoli, Italia
| | - F Roperto
- Dipartimento di Biologia, Università di Napoli Federico II, Napoli, Italia
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Roperto S, Munday JS, Corrado F, Goria M, Roperto F. Detection of bovine papillomavirus type 14 DNA sequences in urinary bladder tumors in cattle. Vet Microbiol 2016; 190:1-4. [DOI: 10.1016/j.vetmic.2016.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 04/05/2016] [Accepted: 04/07/2016] [Indexed: 10/21/2022]
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Munday JS, Thomson N, Dunowska M, Knight CG, Laurie RE, Hills S. Genomic characterisation of the feline sarcoid-associated papillomavirus and proposed classification as Bos taurus papillomavirus type 14. Vet Microbiol 2015; 177:289-95. [DOI: 10.1016/j.vetmic.2015.03.019] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/02/2015] [Accepted: 03/16/2015] [Indexed: 01/04/2023]
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Abstract
Fifty years ago, inoculation with bovine papillomavirus (BPV) was found to cause mesenchymal tumors of the skin in cattle and horses, as well as tumors of the bladder in cattle. Subsequent to these studies of BPVs, human papillomaviruses (HPVs) were found to cause cervical cancer resulting in intense research into papillomaviruses. During the past 50 years, the ways that HPVs and BPVs cause disease have been investigated, and both HPVs and BPVs have been associated with an increasingly diverse range of diseases. Herein, the biology, oncogenic mechanisms, and diseases associated with BPVs are compared with those of HPVs. As reviewed, there are currently significant differences between BPVs and HPVs. However, research 50 years ago into BPVs formed a prologue for the recognition that papillomaviruses have a significant role in human disease, and it is possible that future research may similarly reveal that BPVs are less different from HPVs than is currently recognized.
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Affiliation(s)
- J. S. Munday
- Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
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Papillomaviruses in felids. Vet J 2014; 199:340-7. [DOI: 10.1016/j.tvjl.2013.11.025] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 11/25/2013] [Accepted: 11/28/2013] [Indexed: 12/20/2022]
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Vaatstra BI, Munday JS, Morriss PW. Pigmented chin papillomas in red (Cervus elaphus) x wapiti (Cervus canadensis) stags associated with a novel papillomavirus. N Z Vet J 2013; 62:96-9. [PMID: 24224490 DOI: 10.1080/00480169.2013.840943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
CASE HISTORY Lesions were observed on the chins of two 2- to 3-year-old red (Cervus elaphus) x wapiti (Cervus canadensis) stags from the lower North Island of New Zealand during velvet removal. CLINICAL FINDINGS Both stags had numerous, coalescing, darkly pigmented plaques and nodules on the skin of the chin and lower lips that were 3-10 mm in diameter. Re-examination after 12 months of initial detection revealed no appreciable change in the lesions. A biopsy sample from one lesion was submitted for histopathological examination. HISTOPATHOLOGY Sections revealed lesions consistent with pigmented viral papillomas, characterised by marked epidermal hyperplasia forming papillary fronds, prominent clumping of keratohyalin granules, keratinocytes with dilated grey-blue cytoplasm, shrunken nuclei surrounded by a clear halo (koilocytes), and presumptive viral intranuclear inclusions. Papillomavirus DNA was amplified by PCR from a fresh tissue sample from the same papilloma. Comparison of the partial nucleotide sequence amplified to previously reported papillomaviruses suggested the presence of a novel papillomavirus type. DIAGNOSIS A presumptive diagnosis of pigmented viral papilloma was made. CLINICAL RELEVANCE While the papillomas described in these two cases do not appear to cause major clinical disease, they are visually unappealing and have the potential to spread to other valuable deer.
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Affiliation(s)
- B I Vaatstra
- a Gribbles Veterinary , PO Box 536, Palmerston North 4440 , New Zealand
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Roperto S, Russo V, Ozkul A, Sepici-Dincel A, Maiolino P, Borzacchiello G, Marcus I, Esposito I, Riccardi MG, Roperto F. Bovine papillomavirus type 2 infects the urinary bladder of water buffalo (Bubalus bubalis) and plays a crucial role in bubaline urothelial carcinogenesis. J Gen Virol 2012; 94:403-408. [PMID: 23100367 DOI: 10.1099/vir.0.047662-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Bovine papillomavirus type 2 (BPV-2) has been shown to infect and play a role in urinary bladder carcinogenesis of buffaloes grazed on pastures with ferns from the Marmara and Black Sea Regions of Turkey. BPV-2 DNA has been found in both neoplastic and non-neoplastic lesions of the urinary bladder. Furthermore, this virus may be a normal inhabitant of the urinary bladder since BPV-2 DNA has also been detected in clinically normal buffaloes. The viral activation by fern immunosuppressant or carcinogen may trigger the urothelial cell transformation. The E5 oncoprotein was solely detected in urothelial tumours and appeared to be co-localized with the overexpressed and phosphorylated platelet derived growth factor (PDGF) β receptor in a double-colour immunofluorescence assay. Our results indicate that the E5-PDGF β receptor interaction also occurs in spontaneous tumours of the bubaline urinary bladder, revealing an additional role of BPV-2 in bladder carcinogenesis of buffaloes.
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Affiliation(s)
- Sante Roperto
- Dipartimento di Patologia e Sanità Animale, Sezione Malattie Infettive, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Valeria Russo
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Ayhan Ozkul
- Department of Pathology, Faculty of Veterinary Medicine, Ankara University, Ankara, Turkey
| | - Aylin Sepici-Dincel
- Health Research and Practice Center, Faculty of Medicine, Gazi University, Ankara, Turkey
| | - Paola Maiolino
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Giuseppe Borzacchiello
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Ioan Marcus
- Department of Pathophysiology, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania
| | - Iolanda Esposito
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Marita Georgia Riccardi
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Franco Roperto
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
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Helm J, Morris J. Musculoskeletal neoplasia: an important differential for lumps or lameness in the cat. J Feline Med Surg 2012; 14:43-54. [PMID: 22247324 PMCID: PMC11148916 DOI: 10.1177/1098612x11432826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
PRACTICAL RELEVANCE Musculoskeletal neoplasia is an uncommon but Important differential diagnosis for cats presenting with lameness, pain or swellings associated with bones and/or soft tissues. The most common tumours of soft tissue origin are the sarcomas (in particular feline injection site sarcomas [FISSs]); the most common bone tumour of the cat is osteosarcoma (OSA). CLINICAL CHALLENGES FISSs present a clinical challenge in terms of their local invasiveness, difficulty in obtaining complete surgical excision and high risk of local recurrence. Axial and extraskeletal OSAs pose similar challenges, whereas appendicular OSA is usually easy to remove via limb amputation and can, therefore, carry a good prognosis in many cases. PATIENT GROUP Cats of any age, gender or breed may be affected, although bone tumours predominantly affect middle- to old-aged cats. GLOBAL IMPORTANCE Vaccination of cats is of global importance in preventing feline diseases; hence, any possible significant consequences of vaccination such as neoplasia, even of a low incidence, are of huge concern to cat owners and veterinarians alike. EVIDENCE BASE This review is based on current literature relating to pathogenesis, pathology, presentation, diagnosis, staging, treatment and prognosis. It aims to summarise feline musculoskeletal neoplasia for clinicians in general practice.
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Affiliation(s)
- Jenny Helm
- School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Bearsden, Glasgow G61 1QH, UK.
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Roperto S, Comazzi S, Ciusani E, Paolini F, Borzacchiello G, Esposito I, Lucà R, Russo V, Urraro C, Venuti A, Roperto F. PBMCs are additional sites of productive infection of bovine papillomavirus type 2. J Gen Virol 2011; 92:1787-1794. [PMID: 21525209 DOI: 10.1099/vir.0.031740-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Bovine papillomavirus type 2 (BPV-2) is an oncogenic virus infecting both epithelial and mesenchymal cells. Its life cycle, similar to other papillomaviruses (PVs), appears to be linked to epithelial differentiation. Human and bovine PVs have been known to reside in a latent, episomal form in PBMCs; therefore, it is believed that blood cells, like all mesenchymal cells, function as non-permissive carriers. Here, for the first time in veterinary and comparative medicine, the BPV-2 E5 oncoprotein and the major structural L1 capsid protein, known to be expressed only in productive infections, were shown to occur in defined subsets of PBMCs. E5 oncoprotein was detected in sorted T- and B-cells as well as in monocytes by flow cytometry and Western blot analysis. However, CD4(+) and CD8(+) lymphocytes appeared to be the main circulating targets of the virus, thus possibly representing the most important reservoir of active BPV-2 in blood. L1 protein was identified by flow cytometry in a population of blood cells recognized as lymphocytes by morphological scatter properties. Western blot analysis was performed on lysates obtained from the sorted subpopulations of PBMCs and detected L1 protein in CD4(+) and CD8(+) cells only. Thus, this study showed that CD4(+) and CD8(+) lymphocytes are permissive for BPV-2 and are new, hitherto unknown sites of productive PV infection. In light of these observations, the life cycle of PVs needs to be revisited to gain novel insights into the epidemiology of BPV infection and the pathogenesis of related diseases.
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Affiliation(s)
- Sante Roperto
- Dipartimento di Patologia e Sanità Animale, Sezione di Malattie Infettive, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Stefano Comazzi
- Dipartimento di Patologia Animale, Igiene e Sanità Pubblica Veterinaria, Facoltà di Medicina Veterinaria, Università di Milano, Milano, Italy
| | - Emilio Ciusani
- Fondazione IRCCS Istituto Neurologico 'Carlo Besta', Milano, Italy
| | - Francesca Paolini
- Laboratorio di Virologia, Regina Elena Cancer Institute, Rome, Italy
| | - Giuseppe Borzacchiello
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Iolanda Esposito
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Roberta Lucà
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Valeria Russo
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Chiara Urraro
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
| | - Aldo Venuti
- Laboratorio di Virologia, Regina Elena Cancer Institute, Rome, Italy
| | - Franco Roperto
- Dipartimento di Patologia e Sanità Animale, Sezione Patologia Generale, Facoltà di Medicina Veterinaria, Università di Napoli Federico II, Napoli, Italy
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