1
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Olaya-Galán NN, Blume S, Tong K, Shen H, Gutierrez MF, Buehring GC. In vitro Susceptibility of Human Cell Lines Infection by Bovine Leukemia Virus. Front Microbiol 2022; 13:793348. [PMID: 35359744 PMCID: PMC8964291 DOI: 10.3389/fmicb.2022.793348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/28/2022] [Indexed: 12/17/2022] Open
Abstract
Evidence of the presence of bovine leukemia virus (BLV) in human beings and its association with breast cancer has been published in the literature, proposing it as a zoonotic infection. However, not enough evidence exists about transmission pathways nor biological mechanisms in human beings. This study was aimed at gathering experimental evidence about susceptibility of human cell lines to BLV infection. Malignant and non-malignant human cell lines were co-cultured with BLV-infected FLK cells using a cell-to-cell model of infection. Infected human cell lines were harvested and cultured for 3 to 6 months to determine stability of infection. BLV detection was performed through liquid-phase PCR and visualized through in situ PCR. Seven out of nine cell lines were susceptible to BLV infection as determined by at least one positive liquid-phase PCR result in the 3-month culture period. iSLK and MCF7 cell lines were able to produce a stable infection throughout the 3-month period, with both cytoplasmic and/or nuclear BLV-DNA visualized by IS-PCR. Our results support experimental evidence of BLV infection in humans by demonstrating the susceptibility of human cells to BLV infection, supporting the hypothesis of a natural transmission from cattle to humans.
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Affiliation(s)
- Nury N Olaya-Galán
- Ph.D. Program in Biomedical and Biological Sciences, School of Medicine and Human Health, Universidad del Rosario, Bogotá, Colombia.,Grupo de Enfermedades Infecciosas, Laboratorio de Virología, Departamento de Microbiología, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Skyler Blume
- School of Public Health, University of California, Berkeley, Berkeley, CA, United States
| | - Kan Tong
- School of Public Health, University of California, Berkeley, Berkeley, CA, United States
| | - HuaMin Shen
- School of Public Health, University of California, Berkeley, Berkeley, CA, United States
| | - Maria F Gutierrez
- Grupo de Enfermedades Infecciosas, Laboratorio de Virología, Departamento de Microbiología, Pontificia Universidad Javeriana, Bogotá, Colombia
| | - Gertrude C Buehring
- School of Public Health, University of California, Berkeley, Berkeley, CA, United States
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2
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Khudhair YI, Al-Shammari AM, Hasso SA, Yaseen N. Isolation of Bovine leukemia virus from cows with persistent lymphocytosis in Iraq. Vet Anim Sci 2021; 14:100201. [PMID: 34522823 PMCID: PMC8426556 DOI: 10.1016/j.vas.2021.100201] [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: 11/23/2020] [Revised: 08/27/2021] [Accepted: 08/29/2021] [Indexed: 10/29/2022] Open
Abstract
This is the first study to report on the isolation of bovine leukemia virus (BLV) from peripheral blood mononuclear cells of two cross bred cows in Iraq. The cattle were seropositive by ELISA when selected while being surveyed for the detection of BLV. Among six cows, two were cases of persistent lymphocytosis (PL). Cytopathology was characterized by the formation of multinucleated giant cells (syncytia) and cytoplasmic vacuoles. Moreover, the viruses produced clear plaques on the monolayer of the primary fetal calf kidney (FCK) cells. Inhibition of plaque formation by BLV-antisera suggested a diagnosis of BLV, which was further confirmed by PCR. Cells infected with the isolates were positive to a monoclonal antibody against the viral gp51 trans-membrane glycoprotein by immunocytochemistry. Both isolates replicated and induced cytopathic effects in bovine and human cell line cultures. Phylogenetic analysis based on partial gp51 env gene sequences revealed that Iraqi strain highly homogenous with Turkey strain (100%) and had 1% distance value with other world strains. In conclusion, this present study found that BLV-infected cattle with PL can be a source for viral isolation, and the cytopathological features of the virus infection are arranged and differ depending on the cell type. This is the first study to report on the isolation of the EBL virus in Iraq, and it provides the basis for further studies about a BLV Iraqi strain that can help control this disease.
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Affiliation(s)
- Yahia Ismail Khudhair
- Department of internal and preventive Medicine, College of Veterinary Medicine, University of Al-Qadisiyah, Iraq
| | - Ahmed Majeed Al-Shammari
- Experimental Therapy Department, Iraqi Center for Cancer and Medical Genetic Research, Mustansiriyah University, Baghdad, Iraq
| | - Saleem Amin Hasso
- Department of internal and preventive Medicine, College of Veterinary Medicine, University of Baghdad, Iraq
| | - Nahi Yaseen
- Experimental Therapy Department, Iraqi Center for Cancer and Medical Genetic Research, Mustansiriyah University, Baghdad, Iraq
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3
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Lima EDS, Blagitz MG, Batista CF, Alves AJ, Fernandes ACDC, Ramos Sanchez EM, Frias Torres H, Diniz SA, Silva MX, Della Libera AMMP, de Souza FN. Milk Macrophage Function in Bovine Leukemia Virus-Infected Dairy Cows. Front Vet Sci 2021; 8:650021. [PMID: 34222393 PMCID: PMC8245700 DOI: 10.3389/fvets.2021.650021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/29/2021] [Indexed: 12/14/2022] Open
Abstract
The implications of bovine leukemia virus (BLV) on innate and adaptive immune responses have been widely investigated; however, the effects of BLV on mammary gland immunity require further investigation. The present study investigated the viability, phagocytic capacity, and intracellular production of reactive oxygen and nitrogen species (RONS) by macrophages in milk samples from dairy cows naturally infected with BLV with or without persistent lymphocytosis (PL). No effect of BLV infection in the overall number of macrophages per milliliter and in the percentage of viable macrophages among overall milk viable cells was found. Furthermore, BLV-infected dairy cows had a higher frequency of viable milk macrophages, while healthy animals had a tendency toward a higher percentage of apoptotic milk macrophages. The percentage of milk macrophages that phagocytosed Staphylococcus aureus in seronegative animals was higher than that in BLV-infected dairy cows. No effect of BLV infection on the intracellular RONS production and the intensity of phagocytosis by milk macrophages was observed. Thus, this study provides new insights into the implications of BLV infections in the bovine mammary gland.
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Affiliation(s)
- Ewerton de Souza Lima
- Núcleo Aplicado à Produção e Sanidade da Glândula Mamária, Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil.,Programa de Pós-Graduação em Ciência Animal, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil
| | - Maiara Garcia Blagitz
- Veterinary Clinical Immunology Research Group, Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil.,Programa de Pós-Graduação em Saúde, Bem-estar e Produção Animal Sustentável na Fronteira Sul, Universidade Federal da Fronteira Sul, Avenida Edmundo Gaievski 1000, Realeza, Brazil
| | - Camila Freitas Batista
- Veterinary Clinical Immunology Research Group, Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Alexandre José Alves
- Núcleo Aplicado à Produção e Sanidade da Glândula Mamária, Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil
| | - Artur Cezar de Carvalho Fernandes
- Núcleo Aplicado à Produção e Sanidade da Glândula Mamária, Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil.,Programa de Pós-Graduação em Ciência Animal, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil
| | - Eduardo Milton Ramos Sanchez
- Department of Public Health, School of Health Sciences, National University Toribio Rodriguez de Mendonza of Amazonas, Chachapoyas, Peru.,Laboratório de Sorologia e Imunobiologia, Instituto de Medicina Tropical, Universidade de São Paulo, São Paulo, Brazil
| | - Hugo Frias Torres
- Parasitic and Infectious Diseases Laboratory, Animal Husbandry and Biotechnology Research Institute, Universidad Nacional Toribio Rodríguez de Mendoza, Chachapoyas, Peru
| | - Soraia Araújo Diniz
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marcos Xavier Silva
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Alice Maria Melville Paiva Della Libera
- Veterinary Clinical Immunology Research Group, Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
| | - Fernando Nogueira de Souza
- Núcleo Aplicado à Produção e Sanidade da Glândula Mamária, Departamento de Medicina Veterinária, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil.,Programa de Pós-Graduação em Ciência Animal, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, Brazil.,Veterinary Clinical Immunology Research Group, Departamento de Clínica Médica, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
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4
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Sato H, Bai L, Borjigin L, Aida Y. Overexpression of bovine leukemia virus receptor SLC7A1/CAT1 enhances cellular susceptibility to BLV infection on luminescence syncytium induction assay (LuSIA). Virol J 2020; 17:57. [PMID: 32321527 PMCID: PMC7178733 DOI: 10.1186/s12985-020-01324-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 04/08/2020] [Indexed: 11/10/2022] Open
Abstract
Bovine leukemia virus (BLV) causes enzootic bovine leukosis, the most common neoplastic disease in cattle. We previously reported the development and protocol of the luminescence syncytium induction assay (LuSIA), a method for evaluating BLV infectivity based on CC81-GREMG cells. These cells form syncytia expressing enhanced green fluorescent protein when co-cultured with BLV-infected cells. Recently, we confirmed CAT1/SLC7A1 functions as a receptor of BLV. Here, we focused on CAT1/SLC7A1 to increase the sensitivity of LuSIA. We constructed a bovine CAT1-expressing plasmid and established a new CC81-GREMG-derived reporter cell line highly expressing bovine CAT1 (CC81-GREMG-CAT1). The new LuSIA protocol using CC81-GREMG-CAT1 cells measures cell-to-cell infectivity and cell-free infectivity of BLV faster and with greater sensitivity than the previous protocol using CC81-GREMG. The new LuSIA protocol is quantitative and more sensitive than the previous assay based on CC81-GREMG cells and will facilitate the development of several new BLV assays.
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Affiliation(s)
- Hirotaka Sato
- Nakamura Laboratory, Baton Zone Program, RIKEN Cluster for Science, Technology and Innovation Hub, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.,Virus Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Lanlan Bai
- Virus Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.,Photonics Control Technology Team, RIKEN Center for Advanced Photonics, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Liushiqi Borjigin
- Nakamura Laboratory, Baton Zone Program, RIKEN Cluster for Science, Technology and Innovation Hub, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.,Virus Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Yoko Aida
- Nakamura Laboratory, Baton Zone Program, RIKEN Cluster for Science, Technology and Innovation Hub, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan. .,Virus Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
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5
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Development of a luminescence syncytium induction assay (LuSIA) for easily detecting and quantitatively measuring bovine leukemia virus infection. Arch Virol 2018; 163:1519-1530. [PMID: 29455325 DOI: 10.1007/s00705-018-3744-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 01/02/2018] [Indexed: 01/11/2023]
Abstract
Bovine leukemia virus (BLV) causes enzootic bovine leukosis and is closely related to the human T cell leukemia virus. Since BLV infection mostly occurs via cell-to-cell transmission, BLV infectivity is generally measured by culturing BLV-infected cells with reporter cells that form syncytia upon BLV infection. However, this method is time-consuming and requires skill. To visualize the infectivity of BLV, we developed a new assay called the luminescence syncytium induction assay (LuSIA) that is based on a new reporter cell line designated CC81-BLU3G. CC81-BLU3G is stably transfected with pBLU3-EGFP, which contains the BLV long terminal repeat U3 region linked to the enhanced-green fluorescence protein (EGFP) gene. CC81-BLU3G expresses the EGFP in response to BLV Tax expression specifically, and forms fluorescing syncytia when transfected with an infectious BLV plasmid or when cultured with BLV-infected cells. Compared to the conventional assay, LuSIA was more specific and detected cattle samples with low proviral loads. The fluorescing syncytia was easily detected by eye and automated scanning and LuSIA counts correlated strongly with the proviral load of infected cattle (R2 = 0.8942).
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6
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Shubin AV, Demidyuk IV, Komissarov AA, Rafieva LM, Kostrov SV. Cytoplasmic vacuolization in cell death and survival. Oncotarget 2018; 7:55863-55889. [PMID: 27331412 PMCID: PMC5342458 DOI: 10.18632/oncotarget.10150] [Citation(s) in RCA: 216] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 06/06/2016] [Indexed: 12/15/2022] Open
Abstract
Cytoplasmic vacuolization (also called cytoplasmic vacuolation) is a well-known morphological phenomenon observed in mammalian cells after exposure to bacterial or viral pathogens as well as to various natural and artificial low-molecular-weight compounds. Vacuolization often accompanies cell death; however, its role in cell death processes remains unclear. This can be attributed to studying vacuolization at the level of morphology for many years. At the same time, new data on the molecular mechanisms of the vacuole formation and structure have become available. In addition, numerous examples of the association between vacuolization and previously unknown cell death types have been reported. Here, we review these data to make a deeper insight into the role of cytoplasmic vacuolization in cell death and survival.
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Affiliation(s)
- Andrey V Shubin
- Laboratory of Protein Engineering, Institute of Molecular Genetics, Moscow, Russia.,Laboratory of Chemical Carcinogenesis, N.N. Blokhin Russian Cancer Research Center, Moscow, Russia.,Laboratory of Biologically Active Nanostructures, N.F. Gamaleya Institute of Epidemiology and Microbiology, Moscow, Russia
| | - Ilya V Demidyuk
- Laboratory of Protein Engineering, Institute of Molecular Genetics, Moscow, Russia
| | - Alexey A Komissarov
- Laboratory of Protein Engineering, Institute of Molecular Genetics, Moscow, Russia
| | - Lola M Rafieva
- Laboratory of Protein Engineering, Institute of Molecular Genetics, Moscow, Russia
| | - Sergey V Kostrov
- Laboratory of Protein Engineering, Institute of Molecular Genetics, Moscow, Russia
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7
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Friedenson B. Comment on 'The incidence of leukaemia in women with BRCA1 and BRCA2 mutations: an International Prospective Cohort Study'. Br J Cancer 2016; 115:e2. [PMID: 27459694 PMCID: PMC4997539 DOI: 10.1038/bjc.2016.192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Bernard Friedenson
- Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago, Chicago, IL, USA
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8
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Zargar S, Wani TA, Jain SK. Morphological changes in vero cells postinfection with dengue virus type-2. Microsc Res Tech 2014; 74:314-9. [PMID: 20687131 DOI: 10.1002/jemt.20908] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Accepted: 06/18/2010] [Indexed: 11/09/2022]
Abstract
Although no specific antiviral tablets or injections that can kill the dengue virus are currently available, adequate care and treatment could control its morbidity. Interaction of dengue virus to target cells could be an important feature for virus propagation. Ultrastructural analysis of this interaction was studied with vero cells. Vero cells were treated with Dengue virus type-2 at different time intervals at multiplicity of infection (m.o.i) < 10, m.o.i > 10, and m.o.i = 100. It was found that m.o.i < 10 is best to study morphological changes. At an m.o.i > 10 apoptosis occurs and at m.o.i. = 100, cell necrosis occurs. While studying morphological changes, it was found that at 30 min postinfection cells have morphology very similar to that of the control cells although some have irregular outline and show cytoplasmic projections and intense cytoplasmic vacuolization. After 1-12 hours postinfection (h.p.i), the nuclei ran from normal looking to diffuse. Nuclear membrane begins to disintegrate. Some nucleoli are difficult to be seen. The cytoplasm appears as a mottled, lumps diffuse mass distributed throughout the cytosol, with dense lysosomes and myelin figures, also in the mitochondria. In later hours (24 h.p.i), the intranuclear euchromatin is dispersed and heterochromatin forms peripheral clumps. The cytoplasmic processes are short and few in numbers. A proportion of damaged mitochondria with disrupted cristae appear, suggesting that dengue virus may induce mitochondrial dysfunction and nucleus and mitochondria may be the primary organelles helping in dissemination of virus.
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Affiliation(s)
- Seema Zargar
- Department of Genetics, King Faisal Hospital and Research Centre, Riyadh 11211, Saudi Arabia.
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9
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Rola-Łuszczak M, Materniak M, Pluta A, Hulst M, Kuźmak J. Transcriptomic microarray analysis of BoMac cells after infection with bovine foamy virus. Arch Virol 2014; 159:1515-9. [PMID: 24380972 DOI: 10.1007/s00705-013-1959-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Accepted: 11/18/2013] [Indexed: 12/22/2022]
Abstract
Bovine foamy virus (BFV) infections are highly prevalent among cattle worldwide. However, relatively little is known about the impact of this virus on the host immune system. In our study, we focused on a bovine macrophage cell line (BoMac) and examined changes in the BoMac transcriptome after in vitro infection with BFV using bovine BLOPlus oligo microarrays. One hundred twenty-four genes showed significant changes in expression level. The biological process categories found to be enriched include metabolic processes, cell communication, transport, immune system processes, and response to extracellular stimuli. RT-qPCR was applied to confirm the results obtained for representative genes.
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Affiliation(s)
- Marzena Rola-Łuszczak
- Department of Biochemistry, National Veterinary Research Institute, Partyzantów 57, 24-100, Pulawy, Poland,
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10
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Azedo M, Blagitz M, Souza F, Benesi F, Della Libera A. Avaliação funcional de monócitos de bovinos naturalmente infectados pelo vírus da leucose bovina. ARQ BRAS MED VET ZOO 2011. [DOI: 10.1590/s0102-09352011000500013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Para a avaliação funcional de monócitos de bovinos infectados pelo vírus da leucose enzoótica bovina (LEB), foram coletadas amostras de sangue de 10 vacas com sorodiagnóstico negativo (SN), 10 com sorodiagnóstico positivo e que manifestavam linfocitose persistente (LP), e 10 com sorodiagnóstico positivo alinfocitóticas (AL). Os monócitos foram separados por gradiente de densidade e aderência em placa, submetidos aos testes de viabilidade por exclusão do azul de tripan, fagocitose de partículas de Zymosan, espraiamento em lamínula de vidro e quantificação da liberação de peróxido de hidrogênio (H2O2) e de óxido nítrico (ON). Monócitos de animais com LP apresentaram os menores índices de viabilidade (P<0,001), de fagocitose (P<0,001) e de espraiamento (P=0,006). Também apresentaram maior produção de H2O2 sem prévio estímulo (P=0,001) e após estímulo in vitro com 12-miristato 13-acetato de forbol (P=0,006) do que monócitos de animais SN e AL. O aumento da produção de H2O2 proporcionado pelo estímulo foi menor (P=0,015) nos monócitos de fêmeas que manifestaram LP. Não houve diferença na produção de ON pelos monócitos segundo os grupos. Os resultados indicam que o vírus da LEB, apesar de infectar linfócitos B, altera funcionalmente os monócitos circulantes em bovinos que manifestam LP.
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Lavanya M, Kinet S, Montel-Hagen A, Mongellaz C, Battini JL, Sitbon M, Taylor N. Cell Surface Expression of the Bovine Leukemia Virus-Binding Receptor on B and T Lymphocytes Is Induced by Receptor Engagement. THE JOURNAL OF IMMUNOLOGY 2008; 181:891-8. [DOI: 10.4049/jimmunol.181.2.891] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Gillet N, Florins A, Boxus M, Burteau C, Nigro A, Vandermeers F, Balon H, Bouzar AB, Defoiche J, Burny A, Reichert M, Kettmann R, Willems L. Mechanisms of leukemogenesis induced by bovine leukemia virus: prospects for novel anti-retroviral therapies in human. Retrovirology 2007; 4:18. [PMID: 17362524 PMCID: PMC1839114 DOI: 10.1186/1742-4690-4-18] [Citation(s) in RCA: 242] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Accepted: 03/16/2007] [Indexed: 12/15/2022] Open
Abstract
In 1871, the observation of yellowish nodules in the enlarged spleen of a cow was considered to be the first reported case of bovine leukemia. The etiological agent of this lymphoproliferative disease, bovine leukemia virus (BLV), belongs to the deltaretrovirus genus which also includes the related human T-lymphotropic virus type 1 (HTLV-1). This review summarizes current knowledge of this viral system, which is important as a model for leukemogenesis. Recently, the BLV model has also cast light onto novel prospects for therapies of HTLV induced diseases, for which no satisfactory treatment exists so far.
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Affiliation(s)
- Nicolas Gillet
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Arnaud Florins
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Mathieu Boxus
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Catherine Burteau
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Annamaria Nigro
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Fabian Vandermeers
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Hervé Balon
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Amel-Baya Bouzar
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Julien Defoiche
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Arsène Burny
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | | | - Richard Kettmann
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
| | - Luc Willems
- Molecular and Cellular Biology, Faculté Universitaire des Sciences Agronomiques, Gembloux, Belgium
- Luc Willems, National fund for Scientific Research, Molecular and Cellular Biology laboratory, 13 avenue Maréchal Juin, 5030 Gembloux, Belgium
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13
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Mosquera JA, Hernandez JP, Valero N, Espina LM, Añez GJ. Ultrastructural studies on dengue virus type 2 infection of cultured human monocytes. Virol J 2005; 2:26. [PMID: 15801983 PMCID: PMC1082913 DOI: 10.1186/1743-422x-2-26] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2005] [Accepted: 03/31/2005] [Indexed: 12/04/2022] Open
Abstract
Background Early interaction of dengue virus and monocyte/macrophages could be an important feature for virus dissemination after its initial entry via the mosquito vector. Since ultrastructural analysis of this interaction has not been reported, dengue type 2 (DEN2) virus-infected human monocyte cultures were studied at 1, 2, 4 and 6 hours after infection. Results Typical dengue particles and fuzzy coated viral particles were 35 to 42 nm and 74 to 85 nm respectively. Viruses were engulfed by phagocytosis and macropicnocytosis leading to huge vacuoles and phagosomes inside the monocytes. Interaction of monocytes with DEN2 virus induced apoptosis, characterized by nuclear condensation and fragmentation, cellular shrinkage, blebbing and budding phenomena and phagocytosis of apoptotic cells by neighboring monocytes. This finding was confirmed by TUNEL. Ultrastructural features associated to DEN2 virus replication were not observed. Conclusion These data suggest that clearance of the virus by monocytes and cellular death are the main features during the initial interaction of DEN2 virus and monocytes and this could be important in the rapid elimination of the virus after infection by mosquito vector.
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Affiliation(s)
- Jesus A Mosquera
- Seccion de Inmunologia y Biologia Celular, Instituto de Investigaciones Clinicas "Dr. Americo Negrette". Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Juan Pablo Hernandez
- Instituto de Investigaciones Biologicas. Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Nereida Valero
- Seccion de Virologia, Instituto de Investigaciones Clinicas "Dr. Americo Negrette". Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Luz Marina Espina
- Seccion de Virologia, Instituto de Investigaciones Clinicas "Dr. Americo Negrette". Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - German J Añez
- Seccion de Virologia, Instituto de Investigaciones Clinicas "Dr. Americo Negrette". Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
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14
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Nagaoka K, Sakai A, Nojima H, Suda Y, Yokomizo Y, Imakawa K, Sakai S, Christenson RK. A chemokine, interferon (IFN)-gamma-inducible protein 10 kDa, is stimulated by IFN-tau and recruits immune cells in the ovine endometrium. Biol Reprod 2003; 68:1413-21. [PMID: 12606423 DOI: 10.1095/biolreprod.102.008912] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Proper distribution of immune cells in the uterus is a prerequisite for successful implantation and subsequent placentation, but biochemical signals that govern such events have not been well characterized. In the present study, the cDNA of a chemokine, interferon (IFN)-gamma-inducible protein 10 kDa (IP-10), was identified from a cDNA subtraction study between uterine endometrial tissues from Day 17 pregnant and Day 15 cyclic ewes. The effect of IFN-tau on IP-10 expression and the involvement of IP-10 in the recruitment of immune cells were then investigated. Northern blot analysis revealed that large amounts of IP-10 mRNA were present during conceptus attachment to maternal endometrium and early placentation. IP-10 mRNA was localized to monocytes distributed in the subepithelial stroma of pregnant but not cyclic uteri. This finding was supported by the discovery of IP-10 mRNA expression in monocytes but not in lymphocytes, uterine epithelial cells, or stromal cells. Moreover, the expression of IP-10 mRNA by the monocytes was stimulated by IFN-alpha, IFN-gamma, and IFN-tau in a dose-dependent manner, but the expression of IP-10 mRNA by the endometrial explants was most stimulated by IFN-tau. In a chemotaxis assay, migration of peripheral blood mononuclear cells was stimulated by the addition of IFN-tau stimulated-endometrial culture medium, and the effect was significantly reduced by neutralization with an anti-IP-10 antibody. These results suggest that endometrial IP-10 regulated by conceptus IFN-tau regulates recruitment and/or distribution of immune cells seen in the early pregnant uterus.
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Affiliation(s)
- Kentaro Nagaoka
- Laboratory of Animal Breeding, Faculty of Agriculture, University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
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15
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Llames L, Goyache J, Domenech A, Montaña AV, Suarez G, Gomez-Lucia E. Cellular distribution of bovine leukemia virus proteins gp51SU, Pr72(env), and Pr66(gag-pro) in persistently infected cells. Virus Res 2001; 79:47-57. [PMID: 11551645 DOI: 10.1016/s0168-1702(01)00291-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Monoclonal antibodies (mAbs) against bovine leukemia virus (BLV) mature proteins and precursors were used to map the localization of these proteins in persistently infected non-lymphocytic cell lines using immunofluorescence assay (IFA) and immuno-electron microscopy. IFA staining was observed in the basolateral surface of live FLK-BLV cells. When using a mAb against Pr66(gag-pro), mottled pinpoint fluorescence was seen in the cell surface of polarized cells, but no reaction was observed in cells undergoing mitosis. However, a mAb against Pr72(env) stained only mitotic cells and cellular fragments. Additionally, in these dividing cells, this envelope (Env) precursor polyprotein was not evenly distributed but concentrated predominantly in only one daughter cell. To the best of our knowledge, this observation has not been reported previously, either for BLV or for other retroviruses. The results of immunogold electron microscopy confirmed the specificity of the mAbs in the intracellular level. In infected cells, Pr72(env) and gp51SU were seen in proximity at the plasma membrane in incipient budding sites. Additionally, the mAb against Pr72(env) also reacted with Env precursor polyproteins in the mitochondria of BLV-bat(2) ultrathin sections. These mAbs may be used as a tool for mapping virus excretion sites in the cell surface of naturally or in vitro infected cells in the different stages of the cell cycle.
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Affiliation(s)
- L Llames
- Dpto Patología Animal I, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040, Madrid, Spain
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16
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Altreuther G, Llames L, Neuenschwander S, Langhans W, Werling D. Morphologic and functional changes in bovine monocytes infected in vitro with the bovine leukaemia virus. Scand J Immunol 2001; 54:459-69. [PMID: 11696197 DOI: 10.1046/j.1365-3083.2001.00994.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Experiments on the host cell spectrum of bovine leukaemia virus (BLV), a retrovirus closely related to the human T-cell leukaemia virus (HTLV), have yielded conflicting data. Currently, BLV is known to infect B cells, whereas its ability to infect other cell types, e.g. monocytes/macrophages, is doubtful. As monocytes/macrophages may have profound effects on the diversity of the T-cell response, we studied the possibility of in vitro infection, using bovine monocytes and SV40-transformed bovine macrophages. Proviral DNA was detected by nested polymerase chain reaction (PCR) from day 1 until the end of the experiments at either day 5 or day 80, depending on the quantity of virus used for infection. In addition, the infection was associated with morphological changes in infected cells as revealed by electron microscopy. The in vitro infection did not significantly change either the expression of surface antigens (CD11b, CD32, and major histocompatibility complex (MHC) class II) or the amounts of cytokine transcripts (interleukin (IL)-1beta, tumour necrosis factor (TNF)-alpha, IL-6 and IL-12p40) with or without lipopolysaccharide (LPS) stimulation. The data suggest that BLV can infect monocytes, but the infection does not seem to influence the function or the phenotype of these cells. Infected monocytes may, however, play a role as a viral reservoir in vivo.
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Affiliation(s)
- G Altreuther
- Physiology and Animal Husbandry, Institute of Animal Sciences, Swiss Federal Institute of Technology Zürich, Schorenstrasse 16, CH-8603 Schwerzenbach, Switzerland
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17
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Martin D, Arjona A, Soto I, Barquero N, Viana M, Gómez-Lucía E. Comparative study of PCR as a direct assay and ELISA and AGID as indirect assays for the detection of bovine leukaemia virus. JOURNAL OF VETERINARY MEDICINE. B, INFECTIOUS DISEASES AND VETERINARY PUBLIC HEALTH 2001; 48:97-106. [PMID: 11315529 DOI: 10.1046/j.1439-0450.2001.00424.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The choice of a diagnostic method depends on the characteristics of the herd to be analysed. Two herds with different prevalences of enzootic bovine leukaemia were chosen to study the concordance between agar gel immunodiffusion (AGID), enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR) methods. PCR, an increasingly used virological method, was performed with four sets of primers, amplifying different genomic regions (env, pol and tax), from DNA extracted either from peripheral blood monocytes (PBMCs) or milk leucocytes. The highest percentage of positive animals was obtained using PCR performed with DNA extracted from PBMCs using primers which amplified either env or pol, followed by PCR using PBMCs and primers which hybridized with tax, then ELISA using serum and finally AGID. The results of PCR were more consistent with PBMCs than when milk leucocytes were used.
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Affiliation(s)
- D Martin
- Departamento Patología Animal I, Facultad de Veterinaria, Universidad Complutense, 28040 Madrid, Spain
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18
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Stone DM, Norton LK, Chambers JC, Meek WJ. CD4 T lymphocyte activation in BLV-induced persistent B lymphocytosis in cattle. Clin Immunol 2000; 96:280-8. [PMID: 10964547 DOI: 10.1006/clim.2000.4900] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bovine leukemia virus (BLV) is an oncogenic retrovirus in the human T cell leukemia virus family. BLV infects B lymphocytes and induces a nonmalignant persistent lymphocytosis (PL) and leukemia/lymphoma in cattle. There is evidence that CD4 T lymphocytes are activated during BLV infection and promote the development of PL. How CD4 T lymphocytes are activated by BLV infection is not known. We observed that CD4 T lymphocytes from PL cattle proliferated in the presence of autologous, irradiated peripheral blood mononuclear cells (PBMC), whereas no proliferation occurred in cell cultures from BLV-infected non-PL cattle. Proliferation required direct contact with metabolically active irradiated PBMC but was not associated with viral protein expression or inhibited by antibodies to BLV. Unexpectedly, B lymphocytes alone failed to account for the irradiated PBMC stimulation of CD4 T lymphocytes. These observations and the magnitude of the proliferative response suggest that activation is polyclonal and involves mechanisms other than BLV antigen-specific stimulation.
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Affiliation(s)
- D M Stone
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, 99164-7040, USA
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