1
|
Cardoso TC, Ferreira HL, Okamura LH, Giroto TP, Oliveira BRSM, Fabri CUF, Gameiro R, Flores EF. Cellular response markers and cytokine gene expression in the central nervous system of cattle naturally infected with bovine herpesvirus 5. Vet J 2016; 218:71-77. [PMID: 27938713 DOI: 10.1016/j.tvjl.2016.11.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 11/16/2016] [Accepted: 11/20/2016] [Indexed: 10/20/2022]
Abstract
The present study reports an investigation on the phenotype of inflammatory and immune cells, cytokine and viral gene expression in the brains of cattle naturally infected with bovine herpesvirus 5 (BHV5). Brain sections of 38 affected animals were analysed for the nature and extent of perivascular cuffs in the Virchow-Robin space and parenchyma. Histopathological changes were severe in the olfactory bulbs (Obs), hippocampus, piriform, frontal, temporal and parietal cortices/lobes and were characterized by inflammatory infiltrates in Virchow-Robin spaces. The histopathological changes correlated positively with the distribution of BHV5 antigens (r = 0.947; P < 0.005). Cells of CD3+ phenotype were predominant in areas with severe perivascular cuffs. Viral antigens and genomic viral DNA were detected in the Obs and piriform lobe, simultaneously (r = 0.987; P < 0.005). Similarly, pro-inflammatory cytokine genes INFG, IL2, TNF and LTBR were expressed in the same brain areas (P < 0.005). These results provide important information on the inflammatory and immunological events accompanying BHV5 neurological infections. Our findings provide the first evidence for increased immune activation followed by inflammatory cytokine expression, positively correlated with viral replication in the cranial areas of the brain. Taken together, these results suggest that the host immune response and inflammation play a crucial role in the pathogenesis of acute encephalitis by BHV5 in cattle.
Collapse
Affiliation(s)
- T C Cardoso
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil.
| | - H L Ferreira
- Department of Veterinary Medicine, FZEA-USP-University of Sao Paulo, Av. Duque de Caxias Norte, 225, Pirassununga, São Paulo 13635-900, Brazil
| | - L H Okamura
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil
| | - T P Giroto
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil
| | - B R S M Oliveira
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil
| | - C U F Fabri
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil
| | - R Gameiro
- Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Univ - Universidade Estadual Paulista, Araçatuba, São Paulo 16050-680, Brazil
| | - E F Flores
- Virology Section, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul 97115-900, Brazil
| |
Collapse
|
2
|
Cardoso TC, Rosa ACG, Ferreira HL, Okamura LH, Oliveira BRSM, Vieira FV, Silva-Frade C, Gameiro R, Flores EF. Bovine herpesviruses induce different cell death forms in neuronal and glial-derived tumor cell cultures. J Neurovirol 2016; 22:725-735. [PMID: 27311457 DOI: 10.1007/s13365-016-0444-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 03/29/2016] [Accepted: 04/04/2016] [Indexed: 12/14/2022]
Abstract
Oncolytic viruses have the ability to infect tumor cells and leave healthy cells intact. In this study, bovine herpesvirus 1 (BHV1; Los Angeles, Cooper, and SV56/90 strains) and bovine herpesvirus 5 (BHV5; SV507/99 and GU9457818 strains) were used to infect two neuronal tumor cell lineages: neuro2a (mouse neuroblastoma cells) and C6 (rat glial cells). BHV1 and BHV5 strains infected both cell lines and positively correlated with viral antigen detection (p < 0.005). When neuro2a cells were infected by Los Angeles, SV507/99, and GU9457818 strains, 40 % of infected cells were under early apoptosis and necroptosis pathways. Infected C6 cells were >40 % in necroptosis phase when infected by BHV5 (GU9457818 strain). Blocking caspase activation did not interfere with cell death. However, when necroptosis was blocked, 60-80 % of both infected cells with either virus switched to early apoptosis pathway with no interference with virus replication. Moreover, reactive oxygen species production and mitochondrial membrane dysfunction were detected at high levels in both infected cell lines. In spite of apoptosis and necroptosis blockage, tumor necrosis factor alpha (TNFA) and virus transcription were positively correlated for all viral strains studied. Thus, these results contribute to the characterization of BHV1 and BHV5 as potential oncolytic viruses for non-human cells. Nonetheless, the mechanisms underlying their oncolytic activity in human cells are still to be determined.
Collapse
Affiliation(s)
- Tereza C Cardoso
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil.
| | - Ana Carolina G Rosa
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Helena L Ferreira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
- FZEA-USP, Departamento de Medicina Veterinária, Av. Duque de Caxias Norte, 225, Pirassununga, SP, CEP 13635-900, Brazil
| | - Lucas H Okamura
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Bruna R S M Oliveira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Flavia V Vieira
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Camila Silva-Frade
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Roberto Gameiro
- DAPSA Department, Laboratory of Animal Virology and Cell Culture, College of Veterinary Medicine, Universidade Estadual Paulista, Araçatuba, São Paulo, 16050-680, Brazil
| | - Eduardo F Flores
- Virology Section, Federal University of Santa Maria, Santa Maria, 97115-900, RS, Brazil
| |
Collapse
|
3
|
Marin M, Leunda M, Verna A, Morán P, Odeón A, Pérez S. Distribution of bovine herpesvirus type 1 in the nervous system of experimentally infected calves. Vet J 2016; 209:82-6. [DOI: 10.1016/j.tvjl.2015.10.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 05/16/2015] [Accepted: 10/10/2015] [Indexed: 10/22/2022]
|
4
|
NTPDase and 5'-nucleotidase activities in synaptosomes of rabbits experimentally infected with BoHV-5. J Neurovirol 2015; 21:518-24. [PMID: 26025330 DOI: 10.1007/s13365-015-0349-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 04/21/2015] [Accepted: 04/28/2015] [Indexed: 10/23/2022]
Abstract
Bovine herpesvirus type 5 (BoHV-5) is the causative agent of herpetic meningoencephalitis in cattle. The purinergic system is described as a modulator of the immune response and neuroinflammation. These functions are related to the extracellular nucleotides concentration. NTPDase and 5'-nucleotidase are enzymes responsible for controlling the extracellular concentration of adenosine triphosphate (ATP), adenosine diphosphate (ADP), adenosine monophosphate (AMP), and adenosine (ADO). The aim of this study is to determinate the ectonucleotidase activity in cortical synaptosomes and synaptosomes from the hippocampus of rabbits experimentally infected with BoHV-5. Rabbits were divided into four groups, two control groups (non-inoculated animals), and two infected groups (inoculated with BoHV-5). The infected groups received 0.5 ml of BoHV-5 suspension with 10(7.5)TCID50 of viral strain SV-507/99, per paranasal sinuses, and the control groups received 0.5 ml of minimum essential media per paranasal sinuses. Animals were submitted to euthanasia on days 7 and 12 post-inoculation (p.i.); cerebral cortex and hippocampus were collected for the synaptosomes isolation and posterior determination of the ectonucleotidase activities. The results showed a decrease (P < 0.05) in ectonucleotidase activity in synaptosomes from the cerebral cortex of infected rabbits, whereas an increased (P < 0.05) ectonucleotidase activity was observed in synaptosomes from the hippocampus. These differences may be related with the heterogeneous distribution of ectonucleotidases in the different brain regions and also with the viral infectivity. Therefore, it is possible to speculate that BoHV-5 replication results in changes in ectonucleotidase activity in the brain, which may contribute to the neurological signs commonly observed in this disease.
Collapse
|
5
|
Cheng YJ, Tsai HC, Ye SY, Sy CL, Wu KS, Chen JK, Lee SSJ, Chen YS. Elevated cerebrospinal fluid nitrite level in human immunodeficiency virus-infected patients with neurosyphilis. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2013; 47:512-7. [PMID: 24064284 DOI: 10.1016/j.jmii.2013.07.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 06/11/2013] [Accepted: 07/15/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND/PURPOSE Human immunodeficiency virus (HIV) and syphilis coinfection is a common phenomenon. A percentage of neurosyphilis cases is asymptomatic in HIV-infected patients. The diagnosis of neurosyphilis is more difficult because of the alteration of cerebrospinal fluid (CSF) presentation by the HIV itself. The CSF levels of the degradation products of nitric oxide (NO; e.g., nitrate and nitrite) are reportedly elevated in animals and patients with bacterial meningitis. We hypothesized that an elevated CSF nitrite concentration may be present in patients coinfected with HIV and neurosyphilis. METHODS This cohort study was conducted from January 2007 to June 2008. Forty patients were enrolled and included seven patients in the control group and 33 HIV-infected patients with or without syphilis. Nitrite levels in the serum and the CSF were measured by using the Griess assay. RESULTS The CSF nitrite levels were significantly higher in HIV-infected patients with neurosyphilis, compared to the control group or patients with HIV infection only or patients with HIV and syphilis coinfection (p = 0.026). The CSF nitrite levels were correlated with the CSF white blood cell counts (Spearman correlation test, r(2) = 0.324; p < 0.001). There was no significant difference between different groups in serum nitrite levels. CONCLUSION Marked elevation of CSF nitrite level was observed in HIV-infected patients with neurosyphilis.
Collapse
Affiliation(s)
- Yu-Jung Cheng
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Hung-Chin Tsai
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shin-Yu Ye
- Department of Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Cheng-Len Sy
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuan-Sheng Wu
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Jui-Kuang Chen
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Susan Shin-Jung Lee
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yao-Shen Chen
- Section of Infectious Diseases, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan; Graduate Institute of Science Education and Environmental Education, National Kaohsiung Normal University, Kaohsiung, Taiwan.
| |
Collapse
|
6
|
Dezengrini R, Silva SCD, Weiss M, Kreutz LC, Weiblen R, Flores EF. Atividade de três drogas antivirais sobre os herpesvírus bovino tipos 1, 2 e 5 em cultivo celular. PESQUISA VETERINARIA BRASILEIRA 2010. [DOI: 10.1590/s0100-736x2010001000008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A atividade de três fármacos antivirais (Aciclovir [ACV], Ganciclovir [GCV] e Foscarnet [PFA]) foi testada in vitro frente aos herpesvírus bovino tipos 1 (BoHV-1), 2 (BoHV-2) e 5 (BoHV-5). Para isso, utilizou-se o teste de reducao de placas virais em cultivo celular, testando-se diferentes concentracoes dos farmacos frente a 100 doses infectantes para 50% dos cultivos celulares (DICC50) dos respectivos virus. Pelo teste de MTT (3-(4,5-Dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide), verificou-se que concentracoes inferiores a 200ƒÊg/mL dos tres antivirais resultaram em indices de viabilidade de celulas MDBK e Hep2 superiores a 80%. Com base na concentracao citotoxica para 50% das celulas (CC50) e na concentracao dos farmacos efetiva para inibir em 50% o numero de placas virais (EC50), calculou-se o indice de seletividade (IS) dos antivirais para os tres herpesvirus. Assim, o ACV demonstrou ser moderadamente ativo frente ao BoHV-1 (EC50: 112,9ƒÊg/mL e IS: 4,5), ao BoHV-2 (EC50: 114,2 ƒÊg/mL e IS: 4,5) e BoHV-5 (EC50: 96,9ƒÊg/mL e IS: 5,3). O GCV apresentou atividade moderada frente ao BoHV-2 (EC50: 33,5ƒÊg/mL e IS: 16,6) e, em menor grau, contra o BoHV-5 (EC50: 123,2ƒÊg/mL e IS: 4,5), sendo ineficaz frente ao BoHV-1 (EC50: 335,8ƒÊg/mL e IS: 1,7). O PFA apresentou atividade antiviral mais pronunciada, sendo o unico farmaco que, na concentracao de 100ƒÊg/mL, inibiu completamente a producao de placas pelos tres virus testados. O PFA foi o mais efetivo in vitro frente ao BoHV-1 (EC50: 29,5ƒÊg/mL e IS: 42,2), ao BoHV-2 (EC50: 45,2ƒÊg/mL e IS: 27,6) e ao BoHV-5 (EC50: 7,8ƒÊg/mL e IS: 160,6). Portanto, os resultados obtidos indicam que o PFA pode se constituir em um candidato para terapia experimental de infeccoes pelos herpesvirus de bovinos in vivo.
Collapse
Affiliation(s)
| | | | - Marcelo Weiss
- Universidade Federal de Santa Maria (UFSM),, Brasil; Plum Island Animal Disease Center, USA
| | | | | | | |
Collapse
|
7
|
Silva SC, Brum MCS, Weiblen R, Flores EF, Chowdhury SI. A bovine herpesvirus 5 recombinant defective in the thymidine kinase (TK) gene and a double mutant lacking TK and the glycoprotein E gene are fully attenuated for rabbits. Braz J Med Biol Res 2009; 43:150-9. [PMID: 20027480 DOI: 10.1590/s0100-879x2009007500030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 12/10/2009] [Indexed: 05/26/2023] Open
Abstract
Bovine herpesvirus 5 (BoHV-5), the agent of herpetic meningoencephalitis in cattle, is an important pathogen of cattle in South America and several efforts have been made to produce safer and more effective vaccines. In the present study, we investigated in rabbits the virulence of three recombinant viruses constructed from a neurovirulent Brazilian BoHV-5 strain (SV507/99). The recombinants are defective in glycoprotein E (BoHV-5gEDelta), thymidine kinase (BoHV-5TKDelta) and both proteins (BoHV-5gEDeltaTKDelta). Rabbits inoculated with the parental virus (N = 8) developed neurological disease and died or were euthanized in extremis between days 7 and 13 post-infection (pi). Infectivity was detected in several areas of their brains. Three of 8 rabbits inoculated with the recombinant BoHV-5gEDelta developed neurological signs between days 10 and 15 pi and were also euthanized. A more restricted virus distribution was detected in the brain of these animals. Rabbits inoculated with the recombinants BoHV-5TKDelta (N = 8) or BoHV-5gEDeltaTKDelta (N = 8) remained healthy throughout the experiment in spite of variable levels of virus replication in the nose. Dexamethasone (Dx) administration to rabbits inoculated with the three recombinants at day 42 pi did not result in viral reactivation, as demonstrated by absence of virus shedding and/or increase in virus neutralizing titers. Nevertheless, viral DNA was detected in the trigeminal ganglia or olfactory bulbs of all animals at day 28 post-Dx, demonstrating they were latently infected. These results show that recombinants BoHV-5TKDelta and BoHV-5gEDeltaTKDelta are attenuated for rabbits and constitute potential vaccine candidates upon the confirmation of this phenotype in cattle.
Collapse
Affiliation(s)
- S C Silva
- Setor de Virologia, Departamento de Microbiologia e Parasitologia and Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
| | | | | | | | | |
Collapse
|