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Luo J, Zhang J, Lai W, Wang S, Zhou L, Shi Y, Ba J, Hu J, Wang Y, Li L, Wu BQ. Disseminated Human Parvovirus B19 Infection Induced Multiple Organ Dysfunction Syndrome in an Adult Patient With Alcoholic Hepatitis Complicated by Hemolytic Anemia: A Case Report and Literature Review. Front Immunol 2021; 12:742990. [PMID: 34970255 PMCID: PMC8712433 DOI: 10.3389/fimmu.2021.742990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 11/22/2021] [Indexed: 11/13/2022] Open
Abstract
BackgroundHuman parvovirus B19 (B19) can cause acute hepatitis and is attributed to the high mortality of alcoholic hepatitis (AH). B19 infection is generally self-healing in previously healthy people, but it can cause fatal effects in some high-risk groups and increase its virulence and infectivity. Disseminated B19 infection-induced multiple organ dysfunction syndrome (MODS) in patients with AH has not been reported yet. Here, we described B19 viremia in an adult patient with AH accompanied by hemolytic anemia (HA), leading to disseminated infection and secondary MODS, as well as self-limiting B19 infections in seven nurses caring for him. Meanwhile, we reviewed the literature on AH and B19 infection.Case PresentationA 43-year-old male patient with AH accompanied by HA was transferred to the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China, on March 31, 2021. After supportive treatment, his transaminase and bilirubin levels were reduced, but his anemia worsened. He received a red blood cell (RBC) infusion on April 9 for hemoglobin (Hb) lower than 6 g/dl. On April 13, he suddenly had a high fever. Under empirical anti-infection, his high fever dropped and maintained at a low fever level; however, his anemia worsened. On April 25, he was transferred to the medical intensive care unit (MICU) due to severe pneumonia, acute respiratory distress syndrome (ARDS), acute aplastic crisis (AAC), and hemophagocytic syndrome (HPS), which were subsequently confirmed to be related to B19 infection. After methylprednisolone, intravenous immunoglobulin (IVIG), empirical anti-infection, and supportive treatment, the lung infection improved, but hematopoietic and liver abnormalities aggravated, and systemic B19 infection occurred. Finally, the patient developed a refractory arrhythmia, heart failure, and shock and was referred to a local hospital by his family on May 8, 2021. Unfortunately, he died the next day. Fourteen days after he was transferred to MICU, seven nurses caring for him in his first two days in the MICU developed self-limiting erythema infectiosum (EI).ConclusionsB19 infection is self-limiting in healthy people, with low virulence and infectivity; however, in AH patients with HA, it can lead to fatal consequences and high contagion.
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Affiliation(s)
- Jinmei Luo
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jingcong Zhang
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wenxing Lai
- Division of Hematology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Shaofang Wang
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Laizhi Zhou
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yunfeng Shi
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Junhui Ba
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Jiajia Hu
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanhong Wang
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Laisheng Li
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ben-Quan Wu
- Department of Internal Medicine, Medical Intensive Care Unit and Division of Respiratory Diseases, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- *Correspondence: Ben-Quan Wu,
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Walter-Weingärtner J, Bergmann M, Weber K, Truyen U, Muresan C, Hartmann K. Comparison of Eight Commercially Available Faecal Point-of-Care Tests for Detection of Canine Parvovirus Antigen. Viruses 2021; 13:v13102080. [PMID: 34696513 PMCID: PMC8540396 DOI: 10.3390/v13102080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/08/2021] [Accepted: 10/09/2021] [Indexed: 11/16/2022] Open
Abstract
A real-time polymerase chain reaction (qPCR) is considered the gold standard for the laboratory diagnosis of canine parvovirus (CPV) infection but can only be performed in specialized laboratories. Several point-of-care tests (POCT), detecting CPV antigens in faeces within minutes, are commercially available. The aim of this study was to evaluate eight POCT in comparison with qPCR. Faecal samples of 150 dogs from three groups (H: 50 client-owned, healthy dogs, not vaccinated within the last four weeks; S: 50 shelter dogs, healthy, not vaccinated within the last four weeks; p = 50 dogs with clinical signs of CPV infection) were tested with eight POCT and qPCR. Practicability, sensitivity, specificity, positive (PPV) and negative predictive values (NPV), as well as overall accuracy were determined. To assess the differences between and agreement among POCT, McNemar’s test and Cohen’s Kappa statistic were performed. Specificity and PPV were 100.0% in all POCT. Sensitivity varied from 22.9–34.3% overall and from 32.7–49.0% in group P. VetexpertRapidTestCPVAg® had the highest sensitivity (34.3% overall, 49.0% group P) and differed significantly from the 3 POCT with the lowest sensitivities (Fassisi®Parvo (27.7% overall, 36.7% group P), Primagnost®ParvoH+K (24.3% overall, 34.7% group P), FASTest®PARVOCard (22.9% overall, 32.7% group P)). The agreement among all POCT was at least substantial (kappa >0.80). A positive POCT result confirmed the infection with CPV in unvaccinated dogs, whereas a negative POCT result did not definitely exclude CPV infection due to the low sensitivity of all POCT.
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Affiliation(s)
- Julia Walter-Weingärtner
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (M.B.); (K.W.); (K.H.)
- Correspondence: ; Tel.: +49-89-218-026-50
| | - Michèle Bergmann
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (M.B.); (K.W.); (K.H.)
| | - Karin Weber
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (M.B.); (K.W.); (K.H.)
| | - Uwe Truyen
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, An den Tierkliniken 1, 04103 Leipzig, Germany;
| | - Cosmin Muresan
- Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, Str. Calea Manastur 3–5, 400372 Cluj Napoca, Romania;
| | - Katrin Hartmann
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (M.B.); (K.W.); (K.H.)
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Xu M, Perdomo MF, Mattola S, Pyöriä L, Toppinen M, Qiu J, Vihinen-Ranta M, Hedman K, Nokso-Koivisto J, Aaltonen LM, Söderlund-Venermo M. Persistence of Human Bocavirus 1 in Tonsillar Germinal Centers and Antibody-Dependent Enhancement of Infection. mBio 2021; 12:e03132-20. [PMID: 33531399 PMCID: PMC7858059 DOI: 10.1128/mbio.03132-20] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 12/08/2020] [Indexed: 12/11/2022] Open
Abstract
Human bocavirus 1 (HBoV1), a nonenveloped single-stranded DNA parvovirus, causes mild to life-threatening respiratory tract infections, acute otitis media, and encephalitis in young children. HBoV1 often persists in nasopharyngeal secretions for months, hampering diagnosis. It has also been shown to persist in pediatric palatine and adenoid tonsils, which suggests that lymphoid organs are reservoirs for virus spread; however, the tissue site and host cells remain unknown. Our aim was to determine, in healthy nonviremic children with preexisting HBoV1 immunity, the adenotonsillar persistence site(s), host cell types, and virus activity. We discovered that HBoV1 DNA persists in lymphoid germinal centers (GCs), but not in the corresponding tonsillar epithelium, and that the cell types harboring the virus are mainly naive, activated, and memory B cells and monocytes. Both viral DNA strands and both sides of the genome were detected, as well as infrequent mRNA. Moreover, we showed, in B-cell and monocyte cultures and ex vivo tonsillar B cells, that the cellular uptake of HBoV1 occurs via the Fc receptor (FcγRII) through antibody-dependent enhancement (ADE). This resulted in viral mRNA transcription, known to occur exclusively from double-stranded DNA in the nucleus, however, with no detectable productive replication. Confocal imaging with fluorescent virus-like particles moreover disclosed endocytosis. To which extent the active HBoV1 GC persistence has a role in chronic inflammation or B-cell maturation disturbances, and whether the virus can be reactivated, will be interesting topics for forthcoming studies.IMPORTANCE Human bocavirus 1 (HBoV1), a common pediatric respiratory pathogen, can persist in airway secretions for months hampering diagnosis. It also persists in tonsils, providing potential reservoirs for airway shedding, with the exact location, host cell types, and virus activity unknown. Our study provides new insights into tonsillar HBoV1 persistence. We observed HBoV1 persistence exclusively in germinal centers where immune maturation occurs, and the main host cells were B cells and monocytes. In cultured cell lines and primary tonsillar B cells, we showed the virus uptake to be significantly enhanced by HBoV1-specific antibodies, mediated by the cellular IgG receptor, leading to viral mRNA synthesis, but without detectable productive replication. Possible implications of such active viral persistence could be tonsillar inflammation, disturbances in immune maturation, reactivation, or cell death with release of virus DNA, explaining the long-lasting HBoV1 airway shedding.
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Affiliation(s)
- Man Xu
- Department of Virology, University of Helsinki, Helsinki, Finland
| | | | - Salla Mattola
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
- Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Lari Pyöriä
- Department of Virology, University of Helsinki, Helsinki, Finland
| | - Mari Toppinen
- Department of Virology, University of Helsinki, Helsinki, Finland
| | - Jianming Qiu
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Maija Vihinen-Ranta
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
- Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Klaus Hedman
- Department of Virology, University of Helsinki, Helsinki, Finland
- Helsinki University Hospital, Helsinki, Finland
| | - Johanna Nokso-Koivisto
- Department of Otorhinolaryngology-Head and Neck Surgery, Helsinki University Hospital, Helsinki, Finland
- University of Helsinki, Helsinki, Finland
| | - Leena-Maija Aaltonen
- Department of Otorhinolaryngology-Head and Neck Surgery, Helsinki University Hospital, Helsinki, Finland
- University of Helsinki, Helsinki, Finland
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Ge S, Xu L, Li B, Zhong F, Liu X, Zhang X. Canine Parvovirus is diagnosed and neutralized by chicken IgY-scFv generated against the virus capsid protein. Vet Res 2020; 51:110. [PMID: 32883344 PMCID: PMC7468180 DOI: 10.1186/s13567-020-00832-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/11/2020] [Indexed: 12/21/2022] Open
Abstract
Canine parvovirus (CPV) can cause acute and highly contagious bloody enteritis in dog. To obtain antibodies against CPV, hens were immunized with virus-like particles (VLP) of CPV-VP2. The IgY single chain fragment variables (scFv) were generated by T7 phage display system and expressed in E. coli system. The titer of the primary scFv library reached to 1.5 × 106 pfu/mL, and 95% of the phages contained the target fragments. The CPV-VLP and CPV-VP2 protein showed similar reaction values to the purified scFv in the ELISA test, and the results of ELISA analysis using IgY-scFv toward CPV clinical samples were consistent with commercial immunochromatographic assay (ICA) and PCR detection, the scFv did not show cross reactivity with canine distemper virus (CDV) and canine coronavirus (CCV). IgY-scFv was successfully expressed in CRFK cells, and in the virus suppression assay, 55% of CPV infections were eliminated within 24 h. Docking results demonstrated that the number of amino acids of the binding sides between scFv and VP2 were AA37 and AA40, respectively. This study revealed the feasibility of a novel functional antibody fragment development strategy by generating diversified avian IgY-scFv libraries towards the pathogenic target of interest for both detection and therapeutic purposes in veterinary medicine.
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Affiliation(s)
- Shikun Ge
- Chinese-German Joint Laboratory for Natural Product Research, Key Laboratory of Biological Resources and Ecological Environment of Qinba Areas, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
- Department of Biology, Centre of Molecular and Environmental Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Long Xu
- Chinese-German Joint Laboratory for Natural Product Research, Key Laboratory of Biological Resources and Ecological Environment of Qinba Areas, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
- Department of Biology, Centre of Molecular and Environmental Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Ben Li
- Chinese-German Joint Laboratory for Natural Product Research, Key Laboratory of Biological Resources and Ecological Environment of Qinba Areas, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
| | - Fagang Zhong
- State Key Laboratory for Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, China
| | - Xiang Liu
- Chinese-German Joint Laboratory for Natural Product Research, Key Laboratory of Biological Resources and Ecological Environment of Qinba Areas, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
| | - Xiaoying Zhang
- Chinese-German Joint Laboratory for Natural Product Research, Key Laboratory of Biological Resources and Ecological Environment of Qinba Areas, School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, China
- Department of Biology, Centre of Molecular and Environmental Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON Canada
- State Key Laboratory for Sheep Genetic Improvement and Healthy Production, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, China
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Chang D, Liu Y, Chen Y, Hu X, Burov A, Puzyr A, Bondar V, Yao L. Study of the immunogenicity of the VP2 protein of canine parvovirus produced using an improved Baculovirus expression system. BMC Vet Res 2020; 16:202. [PMID: 32552679 PMCID: PMC7301529 DOI: 10.1186/s12917-020-02422-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 06/09/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Canine parvovirus (CPV) is now recognized as a serious threat to the dog breeding industry worldwide. Currently used CPV vaccines all have their specific drawbacks, prompting a search for alternative safe and effective vaccination strategies such as subunit vaccine. VP2 protein is the major antigen targeted for developing CPV subunit vaccine, however, its production in baculovirus expression system remains challenging due to the insufficient yield. Therefore, our study aims to increase the VP2 protein production by using an improved baculovirus expression system and to evaluate the immunogenicity of the purified VP2 protein in mice. RESULTS The results showed that high-level expression of the full length VP2 protein was achieved using our modified baculovirus expression system. The recombinant virus carrying two copies of VP2 gene showed the highest expression level, with a productivity of 186 mg/L, which is about 1.4-1.6 fold that of the recombinant viruses carrying only one copy. The purified protein reacted with Mouse anti-His tag monoclonal antibody and Rabbit anti-VP2 polyclonal antibody. BALB/c mice were intramuscularly immunized with purified VP2 protein twice at 2 week intervals. After vaccination, VP2 protein could induce the mice produce high level of hemagglutination inhibition antibodies. CONCLUSIONS Full length CPV VP2 protein was expressed at high level and purified efficiently. Moreover, it stimulated mice to produce high level of antibodies with hemmaglutination inhibition properties. The VP2 protein expressed in this study could be used as a putative economic and efficient subunit vaccine against CPV infection.
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Affiliation(s)
- Dao Chang
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yangkun Liu
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yangyang Chen
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Xiaomin Hu
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Andrey Burov
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Alexey Puzyr
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Vladimir Bondar
- Institute of Biophysics, Siberian Branch of Russian Academy of Science, Federal Research Center "Krasnoyarsk Science Center SB RAS", 660036, Krasnoyarsk, Russia
| | - Lunguang Yao
- Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry; Key Laboratory of Ecological Security and Collaborative Innovation Centre of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project of Henan Province, School of Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China.
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Alves F, Prata S, Nunes T, Gomes J, Aguiar S, Aires da Silva F, Tavares L, Almeida V, Gil S. Canine parvovirus: a predicting canine model for sepsis. BMC Vet Res 2020; 16:199. [PMID: 32539830 PMCID: PMC7294767 DOI: 10.1186/s12917-020-02417-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 06/08/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Sepsis is a severe condition associated with high prevalence and mortality rates. Parvovirus enteritis is a predisposing factor for sepsis, as it promotes intestinal bacterial translocation and severe immunosuppression. This makes dogs infected by parvovirus a suitable study population as far as sepsis is concerned. The main objective of the present study was to evaluate the differences between two sets of SIRS (Systemic Inflammatory Response Syndrome) criteria in outcome prediction: SIRS 1991 and SIRS 2001. The possibility of stratifying and classifying septic dogs was assessed using a proposed animal adapted PIRO (Predisposition, Infection, Response and Organ dysfunction) scoring system. RESULTS The 72 dogs enrolled in this study were scored for each of the PIRO elements, except for Infection, as all were considered to have the same infection score, and subjected to two sets of SIRS criteria, in order to measure their correlation with the outcome. Concerning SIRS criteria, it was found that the proposed alterations on SIRS 2001 (capillary refill time or mucous membrane colour alteration) were significantly associated with the outcome (OR = 4.09, p < 0.05), contrasting with the 1991 SIRS criteria (p = 0.352) that did not correlate with the outcome. No significant statistical association was found between Predisposition (p = 1), Response (p = 0.1135), Organ dysfunction (p = 0.1135), total PIRO score (p = 0.093) and outcome. To explore the possibility of using the SIRS criteria as a fast decision-making tool, a Fast-and-Frugal tree (FFT) was created with a sensitivity of 92% and a specificity of 29%. CONCLUSION These results suggest that increasing the SIRS criteria specificity may improve their prognostic value and their clinical usefulness. In order to improve the proposed PIRO scoring system outcome prediction ability, more specific criteria should be added, mainly inflammatory and organ dysfunction biomarkers.
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Affiliation(s)
- F. Alves
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - S. Prata
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- Veterinary Teaching Hospital, Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - T. Nunes
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - J. Gomes
- Veterinary Teaching Hospital, Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - S. Aguiar
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - F. Aires da Silva
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - L. Tavares
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - V. Almeida
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
| | - S. Gil
- Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- Veterinary Teaching Hospital, Faculty of Veterinary Medicine, ULisboa, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
- CIISA - Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisboa, Portugal
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7
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Wang X, Zhang J, Huo S, Zhang Y, Wu F, Cui D, Yu H, Zhong F. Development of a monoclonal antibody against canine parvovirus NS1 protein and investigation of NS1 dynamics and localization in CPV-infected cells. Protein Expr Purif 2020; 174:105682. [PMID: 32502709 DOI: 10.1016/j.pep.2020.105682] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 05/20/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023]
Abstract
Canine parvovirus (CPV) non-structural protein-1 (NS1) plays crucial roles in CPV replication and transcription, as well as pathogenic effects to the host. However, the mechanism was not fully understood. Lack of NS1 antibody is one of the restricting factors for NS1 function investigation. To prepare NS1 monoclonal antibody (mAb), the NS1 epitope (AA461 ~ AA650) gene was amplified by PCR, and inserted into pGEX-4T-1vector to construct the prokaryotic expression vector of GST-tag-fused NS1 epitope gene. The NS1 fusion protein was expressed in E. coli, and purified with GSH-magnetic beads, and then used to immunize BALB/c mice. The mouse splenic lymphocytes were isolated and fused with myeloma cells (SP 2/0) to generate hybridoma cells. After several rounds of screening by ELISA, a hybridoma cell clone (1B8) stably expressing NS1 mAb was developed. A large amount of NS1 mAb was prepared from mouse ascites fluid. The isotype of NS1 mAb was identified as IgG1, which can specifically bind NS1 protein in either CPV-infected cells or NS1 vector-transfected cells, indicating the NS1 mAb is effective in detecting NS1 protein. Meanwhile, we used the NS1 mAb to investigate NS1 dynamic changes by qRT-PCR and location by confocal imaging in CPV-infected host cells and showed that NS1 began to appear in the cells at 12 h after CPV infection and reached the highest level at 42 h, NS1 protein was mainly located in nucleus of the cells. This study provided a necessary condition for further investigation on molecular mechanism of NS1 function and pathogenicity.
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MESH Headings
- Animals
- Antibodies, Monoclonal, Murine-Derived/chemistry
- Antibodies, Monoclonal, Murine-Derived/immunology
- Antibodies, Viral/chemistry
- Antibodies, Viral/immunology
- Cell Line
- Epitopes/chemistry
- Epitopes/genetics
- Epitopes/immunology
- Epitopes/metabolism
- Female
- Mice
- Mice, Inbred BALB C
- Parvoviridae Infections/immunology
- Parvoviridae Infections/metabolism
- Parvovirus, Canine/chemistry
- Parvovirus, Canine/genetics
- Parvovirus, Canine/immunology
- Parvovirus, Canine/metabolism
- Recombinant Proteins/chemistry
- Recombinant Proteins/genetics
- Recombinant Proteins/immunology
- Viral Nonstructural Proteins/chemistry
- Viral Nonstructural Proteins/genetics
- Viral Nonstructural Proteins/immunology
- Viral Nonstructural Proteins/metabolism
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Affiliation(s)
- Xing Wang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China; Rinpu (Baoding) Biological Pharmaceutical Co., LTD, Baoding, 071004, China
| | - Jianlou Zhang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China
| | - Shanshan Huo
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China; College of Animal Science and Technology, Hebei Agricultural University, Baoding, 071000, China
| | - Yonghong Zhang
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China
| | - Fengyang Wu
- College of Animal Science and Technology, Hebei Agricultural University, Baoding, 071000, China
| | - Dan Cui
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China
| | - Hongwei Yu
- Rinpu (Baoding) Biological Pharmaceutical Co., LTD, Baoding, 071004, China.
| | - Fei Zhong
- Laboratory of Molecular Virology and Immunology, College of Veterinary Medicine, Hebei Agricultural University, Hebei Veterinary Biotechnology Innovation Center, Baoding, 071000, China; College of Animal Science and Technology, Hebei Agricultural University, Baoding, 071000, China.
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8
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Ashaka OS, Salu OB, James AB, Oyefolu AOB, Anjorin AA, Oke BO, Orenolu MR, Omilabu SA. Parvovirus B19 DNA detection in treatment-naïve HIV anemic patients in Lagos, Nigeria: a case control study. Afr Health Sci 2020; 20:219-226. [PMID: 33402910 PMCID: PMC7750054 DOI: 10.4314/ahs.v20i1.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Parvovirus B19 (B19) has tropism for cells of the erythroid lineage, which may lead to transient inhibition of erythropoiesis. Several studies and case reports suggested that B19 infection may contribute significantly to severe chronic anemia in HIV infected persons. OBJECTIVE To detect parvovirus B19 DNA in treatment-naïve HIV patients. METHODS This was a case control retrospective study. One hundred nineteen anemic and 81 non-anemic treatment-naïve HIV infected patients participated in the study at the Lagos University Teaching Hospital, Lagos, Nigeria. Polymerase chain reaction was used to detect B19 DNA. RESULTS Out of 200 patients analysed, 13(6.5%) had parvovirus B19 DNA. Eight HIV patients with anemia had B19 DNA while five non-anemic HIV patients had B19 DNA. This suggests that the presence of B19 DNA in the blood of HIV positive individuals may contribute to anemia because the majority (61.5%) who were positive for B19 DNA had anemia as compared to the non-anemic control group (38.5%). CONCLUSION This study shows that the presence of B19 DNA in anemic HIV infected patients is not associated with chronic anaemia in HIV infection because no significant association exist.
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Affiliation(s)
- Oluwaseyi Sedowhe Ashaka
- Medical Microbiology and Parasitology, College of Health Sciences, University of Ilorin, Ilorin, Nigeria
| | - Olumuyiwa Babalola Salu
- College of Medicine of the University of Lagos, Medical Microbiology and Parasitology P.M.B. 12003, Idi-Araba, Surulere Lagos, Nigeria
- College of Medicine of the University of Lagos, Centre for Human and Zoonotic Virology (CHAZVY) P.M.B. 12003, Idi-Araba Surulere Lagos, Nigeria
| | - Ayorinde Babatunde James
- College of Medicine of the University of Lagos, Centre for Human and Zoonotic Virology (CHAZVY) P.M.B. 12003, Idi-Araba Surulere Lagos, Nigeria
- Department of Biochemistry and Nutrition, Nigerian Institute of Medical Research, Yaba, Lagos, Nigeria
| | | | | | | | - Mercy Remilekun Orenolu
- College of Medicine of the University of Lagos, Centre for Human and Zoonotic Virology (CHAZVY) P.M.B. 12003, Idi-Araba Surulere Lagos, Nigeria
| | - Sunday Aremu Omilabu
- College of Medicine of the University of Lagos, Medical Microbiology and Parasitology P.M.B. 12003, Idi-Araba, Surulere Lagos, Nigeria
- College of Medicine of the University of Lagos, Centre for Human and Zoonotic Virology (CHAZVY) P.M.B. 12003, Idi-Araba Surulere Lagos, Nigeria
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9
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Chiang SR, Lin CY, Chen DY, Tsai HF, Lin XC, Hsu TC, Tzang BS. The effects of human parvovirus VP1 unique region in a mouse model of allergic asthma. PLoS One 2019; 14:e0216799. [PMID: 31086415 PMCID: PMC6516678 DOI: 10.1371/journal.pone.0216799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 04/29/2019] [Indexed: 01/22/2023] Open
Abstract
Evidence has indicated that viral infection increases the risk of developing asthma. Although the association of human parvovirus B19 (B19V) or human bocavirus (HBoV) with respiratory diseases has been reported, little is known about the influence of the B19V-VP1u and HBoV-VP1u proteins on the symptoms of asthma. Herein, we investigated the systemic influence of subcutaneously injected B19V-VP1u and HBoV-VP1u recombinant proteins in an OVA-sensitized asthmatic mouse model. A significantly higher Penh ratio and IgE level were detected in the serum, bronchoalveolar lavage fluid (BALF) and the supernatant of a lymphocyte culture from mice treated with HBoV-VP1u or B19V-VP1u than in a lymphocyte culture from OVA-sensitized mice. Significantly higher levels of serum and BALF IgE, total IgG, IgG1, OVA-specific IgE and OVA-specific IgG1 were detected in mice treated with HBoV-VP1u or B19V-VP1u than in OVA-sensitized mice. Conversely, a significantly lower IgG2a level was detected in mice from the HBoV-VP1u or B19V-VP1u groups than in mice from the OVA group. The mice treated with HBoV-VP1u or B19V-VP1u exhibited more significant lung inflammatory indices, including elevated serum and BALF IL-4, IL-5, IL-10 and IL-13 levels; BALF lymphocyte, neutrophil and eosinophil counts, MMP-9 and MMP-2 activity; and the amount of lymphocyte infiltration, relative to those in the control mice or in those sensitized with OVA. These findings demonstrate that the subcutaneous injection of HBoV-VP1u or B19V-VP1u proteins in OVA-sensitized mice result in elevated asthmatic indices and suggest that human parvoviruses may increase the risk of developing airway inflammation in a mouse model of asthma.
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Affiliation(s)
- Shyh-Ren Chiang
- Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan, R.O.C
- Department of General Science, Chia Nan University of Pharmacy and Science, Tainan, Taiwan, R.O.C
| | - Chia-Yun Lin
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan, R.O.C
| | - Der-Yuan Chen
- Rheumatology and Immunology Center, China Medical University Hospital, Taichung, Taiwan, R.O.C
- Rheumatic Diseases Research Center, Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, R.O.C
- School of Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Hui-Fang Tsai
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taiwan, R.O.C
| | - Xin-Ci Lin
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan, R.O.C
| | - Tsai-Ching Hsu
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan, R.O.C
- Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan, R.O.C
- Immunology Research Center, Chung Shan Medical University, Taichung, Taiwan, R.O.C
- * E-mail: (BST); (TCH)
| | - Bor-Show Tzang
- Institute of Biochemistry, Microbiology and Immunology, Chung Shan Medical University, Taichung, Taiwan, R.O.C
- Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan, R.O.C
- Immunology Research Center, Chung Shan Medical University, Taichung, Taiwan, R.O.C
- Department of Biochemistry, School of Medicine, Chung Shan Medical University, Taichung, Taiwan, R.O.C
- * E-mail: (BST); (TCH)
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10
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Väisänen E, Mohanraj U, Kinnunen PM, Jokelainen P, Al-Hello H, Barakat AM, Sadeghi M, Jalilian FA, Majlesi A, Masika M, Mwaengo D, Anzala O, Delwart E, Vapalahti O, Hedman K, Söderlund-Venermo M. Global Distribution of Human Protoparvoviruses. Emerg Infect Dis 2019; 24:1292-1299. [PMID: 29912685 PMCID: PMC6038761 DOI: 10.3201/eid2407.172128] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Development of next-generation sequencing and metagenomics has revolutionized detection of novel viruses. Among these viruses are 3 human protoparvoviruses: bufavirus, tusavirus, and cutavirus. These viruses have been detected in feces of children with diarrhea. In addition, cutavirus has been detected in skin biopsy specimens of cutaneous T-cell lymphoma patients in France and in 1 melanoma patient in Denmark. We studied seroprevalences of IgG against bufavirus, tusavirus, and cutavirus in various populations (n = 840), and found a striking geographic difference in prevalence of bufavirus IgG. Although prevalence was low in adult populations in Finland (1.9%) and the United States (3.6%), bufavirus IgG was highly prevalent in populations in Iraq (84.8%), Iran (56.1%), and Kenya (72.3%). Conversely, cutavirus IgG showed evenly low prevalences (0%–5.6%) in all cohorts, and tusavirus IgG was not detected. These results provide new insights on the global distribution and endemic areas of protoparvoviruses.
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11
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Armenise A, Trerotoli P, Cirone F, De Nitto A, De Sario C, Bertazzolo W, Pratelli A, Decaro N. Use of recombinant canine granulocyte-colony stimulating factor to increase leukocyte count in dogs naturally infected by canine parvovirus. Vet Microbiol 2019; 231:177-182. [PMID: 30955806 DOI: 10.1016/j.vetmic.2019.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/11/2019] [Accepted: 03/12/2019] [Indexed: 11/18/2022]
Abstract
Canine parvovirus (CPV) is one of the most important cause of mortality in young dogs and no specific treatment exists. Since prolonged leukopenia greatly increases the risk of death in infected pups, strategies to counteract this decline were investigated. The outcomes of CPV naturally infected pups treated with the recombinant canine granulocyte-colony stimulating factor (rcG-CSF), in combination with the routine therapy, were compared with similarly-managed infected pups not treated with rcG-CSF. A non-randomized prospective clinical trial was performed on 62 CPV infected pups with WBC counts <3000 cells/μL and two different groups were selected based on a non-randomized approach. Group A dogs (31/62) received 5 μg/Kg of rcG-CSF daily from the hospitalization day until WBC reached the reference range (3-5 days) and group B (31/62) received 1 ml of placebo injection. All dogs in group A recovered, while five dogs in group B died. The rcG-CSF treatment demonstrated a statistically significant effect on WBC counts (p < 0.0001) and, surprisingly, also on lymphocytes and monocytes counts (p < 0.0001). There was no significant effect of treatment on neutrophil count (p = 0.5502). Although lymphocytes and monocytes are not a specific target for rcG-CSF, our study highlights that rcG-CSF is able to improve haematological parameters compared to untreated dogs and a clear increase in their number was detected, as previously described for humans treated with the homologous molecule.
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Affiliation(s)
- Andrea Armenise
- "Santa Fara" Veterinary Hospital, Via G.N. Bellomo 91 bis, 70124, Bari, Italy
| | - Paolo Trerotoli
- Department of Biomedical Science and Human Oncology, University of Bari "Aldo Moro", P.zza G. Cesare 11, 70124, Bari, Italy
| | - Francesco Cirone
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima km 3, 70010, Valenzano, Bari, Italy
| | - Anna De Nitto
- "Santa Fara" Veterinary Hospital, Via G.N. Bellomo 91 bis, 70124, Bari, Italy
| | - Costantina De Sario
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima km 3, 70010, Valenzano, Bari, Italy
| | - Walter Bertazzolo
- "Città di Pavia" Veterinary Hospital, Viale Cremona 179, 27100, Pavia, Italy
| | - Annamaria Pratelli
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima km 3, 70010, Valenzano, Bari, Italy.
| | - Nicola Decaro
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima km 3, 70010, Valenzano, Bari, Italy
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12
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Sierra-Delgado JA, Bautista-Nino PK, Vargas-Castellanos CI, Serrano Diaz NC, Rincon MY. [Immune response and gene therapy with adenoassociated viral vectors]. Medicina (B Aires) 2019; 79:493-501. [PMID: 31829952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Abstract
In recent years, gene therapy has been positioned as a real and safe option in the development of therapeutic alternatives for the cure and prevention of different diseases. It consists in the insertion of genetic material in a defective tissue or cell, through the use of a vector. There are several considerations for selecting the most appropriate vector, including the potential for binding and entry to the target cell, the ability of the genetic material to transfer to the nucleus, the ability to express the insert, and the absence of toxicity. In the current scenario, the most commonly used viral vectors are those derived from adeno-associated viruses (AAV). Characteristics such as biosafety, low toxicity and selective tropism have enabled its evaluation as a therapeutic option in many monogenic or complex diseases. Despite their advantages, AAV vectors have drawbacks, the most important being the patient's immune response to the vector, especially the response mediated by neutralizing antibodies (NAb). NAbs decrease the transduction of the vector and prevent the expression of the gene it transports, limiting its clinical application. Therefore, identifying and quantifying the presence and activity of NAbs is the first step in any gene therapy protocol with AAV vectors. The presence of NAbs depends mainly on exposure to the virus in nature and varies drastically according to age, geographic location and health status of the person evaluated.
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Affiliation(s)
- Julieth A Sierra-Delgado
- Universidad Industrial de Santander, Bucaramanga, Santander, Colombia
- Dirección de Investigaciones, Fundación Cardiovascular de Colombia, Floridablanca, Santander, Colombia
| | - Paula K Bautista-Nino
- Dirección de Investigaciones, Fundación Cardiovascular de Colombia, Floridablanca, Santander, Colombia
| | | | - Norma C Serrano Diaz
- Dirección de Investigaciones, Fundación Cardiovascular de Colombia, Floridablanca, Santander, Colombia
- Hospital Internacional de Colombia, Piedecuesta, Santander, Colombia
| | - Melvin Y Rincon
- Dirección de Investigaciones, Fundación Cardiovascular de Colombia, Floridablanca, Santander, Colombia. E-mail:
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13
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Tian W, Qiu Z, Cui Y, Zhang J, Ma X, Cui S, Zheng S. Comparison of immune responses induced by porcine parvovirus virus-like particles and inactivated vaccine. Pak J Pharm Sci 2019; 32:377-382. [PMID: 30852473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Laboratory-prepared inactivated porcine parvovirus (PPV) vaccines and VP2 virus-like particles (VLPs) were utilized to immunize gilts. PPV BQ strain and SP2/0 cells were used. Hemagglutination-inhibiting (HI) antibody titers were measured in the immunized gilts and the differences in cytokine production of interferon gamma (IFN-γ, IL-2 and IL-4) were compared. CD4+ and CD8+ T cells proliferation were compared by flow cytometry. The variation between the immune response level induced by inactivated PPV vaccine and VP2 VLPs were determined. The results showed that all vaccinated gilts had HI antibody titers reaching 1:256 for at least one month post immunization and the peak level of antibody could be sustained for one month; further, PPV antibodies could be detected in the second week post immunization with VP2 VLPs. We also found that the level of cytokines (IFN-γ, IL-2 and IL-4) were all increased post immunization and continued to rise after the booster immunization; the level of increase in IFN-γ and IL-2 were significantly higher than IL-4. The flow cytometry results showed that the numbers of the CD4+ and CD8+ T cells subsets were significantly higher in the groups immunized with inactivated PPV vaccine or VP2 VLPs than those of negative control group (p<0.01); additionally, the number of CD4+ cells in the gilts that received VP2 VLP immunization was significantly higher than the inactivated vaccine group (p<0.01). In summary, the inactivated PPV vaccine and PPV VP2 VLPs were both able to induce humoral and cellular immunity, but the VP2 VLPs lead to better cellular immune responses in gilts compared to those of the inactivated vaccine..
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Affiliation(s)
- Wei Tian
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, No.59 Mucai street, Harbin, People's Republic of China / State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Zheng Qiu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Yuchao Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Jing Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Xingjie Ma
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Shangjin Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Haping Street, Harbin, People's Republic of China
| | - Shimin Zheng
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, No.59 Mucai street, Harbin, People's Republic of China
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14
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Tu M, Liu P, Liu F, Wang M, Jia R, Zhu D, Liu M, Sun K, Yang Q, Wu Y, Chen X, Cheng A, Chen S. Construction of expression vectors of capsid proteins from goose parvovirus and investigation of the immunogenicity. Acta Virol 2018; 62:415-423. [PMID: 30472872 DOI: 10.4149/av_2018_410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Goose parvovirus (GPV) is a highly contagious and lethal disease in goslings and Muscovy ducklings, and is of concern to the waterfowl industry. With the aim of comparing the cellular immunogenicity of three capsid proteins of GPV, plasmids of pcDNA3.1(+)-VP1, pcDNA3.1(+)-VP2, and pcDNA3.1(+)-VP3 were constructed, and the recombinant protein VPs were expressed using an eukaryotic expression system. We detected the levels of immune-related genes (CD4, CD8α, IL-1β, IL-6, IFNα, IFNγ, and IFNλ) in both goose embryo fibroblasts (GEF) and goose peripheral blood mononuclear cells (PBMCs) cellular models. The immune response conferred by a VP2 DNA vaccine in vivo was observed in a time course. Our data suggested that the cellular immune response to VP2 and VP3 was stronger than that to VP1, while VP2 and VP3 shared similar cellular immune reactivity. In addition, vaccination with VP2 plasmid can induce high level of IgY antibody that continued to increase through 28 days post vaccination. Therefore, our findings shed light on the host cellular immune response against GPV capsid proteins. Keywords: GPV; capsid proteins; cellular immune response; humoral immunity.
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15
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Vila Nova B, Cunha E, Sepúlveda N, Oliveira M, São Braz B, Tavares L, Almeida V, Gil S. Evaluation of the humoral immune response induced by vaccination for canine distemper and parvovirus: a pilot study. BMC Vet Res 2018; 14:348. [PMID: 30445957 PMCID: PMC6240190 DOI: 10.1186/s12917-018-1673-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 10/25/2018] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Canine Distemper Virus (CDV) and Canine Parvovirus (CPV) lead to infections with high mortality rates in dogs. These viruses affect unvaccinated dogs or dogs with incomplete vaccination protocols. Vaccination plays an important role in reducing death rates, preventing clinical cases and controlling the spread of virus However, the efficacy of vaccination might be affected by different factors including vaccine scheduling and the neutralization of the vaccine targets by maternal antibodies. In face of these factors, the main goals of this study are (i) to investigate the antibody responses of puppies undergoing different primary vaccination protocols against CPV and CDV and (ii) to estimate the time until seroreversion in adult dogs unvaccinated for at least 3 years. RESULTS Antibody protection against CDV and CPV was evaluated in a total of 20 dogs: 5 puppies that initiated immunization at 6 weeks after birth (group A), 8 animals that started vaccination between 8 and 12 weeks of age (group B), and 7 adult dogs that have not been vaccinated for at least 3 years (group C). Blood samples were collected from each animal, with 3 to 4 weeks apart. Antibody responses were measured using indirect ELISA. In the second immunization point, no significant differences were found between the seroconversion of groups A and B for each viral infection (p = 0.81 and 0.20 for CDV and CPV, respectively). In the third immunization, there was evidence for a shorter time to achieve a protective titer against CPV in group B when compared to group A (p = 0.015). Similar evidence was not found for CDV (p-value = 0.41). In Group C, the average time until seroveversion was estimated at 2.86 years and 7.63 years for CDV and CPV, respectively. CONCLUSION Vaccine response to CDV and CPV is specific in each individual. Effective immune protection in primary vaccination depends mainly on the initial titer of maternal antibodies acquired by the neonate. Other factors such as environmental exposure, immunization schedules and immune system activity influence the duration of immunity in adult dogs. The variability found reinforces the need to determine individual humoral immunity levels in order to assess vaccine efficacy.
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Affiliation(s)
- Beatriz Vila Nova
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Eva Cunha
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Nuno Sepúlveda
- London School of Hygiene and Tropical Medicine, London, UK
- Centro de Estatística e Aplicações da Universidade de Lisboa, Lisbon, Portugal
| | - Manuela Oliveira
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Berta São Braz
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Luis Tavares
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Virgílio Almeida
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
| | - Solange Gil
- Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
- CIISA- Centre for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, Av. Universidade Técnica, 1300-477 Lisbon, Portugal
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16
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Pakkyara A, Jha A, Al Salmi I, Siddiqi WA, Al Rahbi N, Kurkulasurya AP, Mohsin J. Persistent anemia in a kidney transplant recipient with parvovirus B19 infection. Saudi J Kidney Dis Transpl 2017; 28:1447-1450. [PMID: 29265066 DOI: 10.4103/1319-2442.220846] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Anemia after kidney transplant is not uncommon. This paper reports a case of unexplained anemia in a kidney transplant recipient that persisted for more than two months, and that did not respond to recombinant human erythropoietin treatment but was successfully treated after diagnosing Parvovirus B19 (ParvoV B19) infection. A middle-aged male underwent living-unrelated kidney transplantation from Pakistan in April 2015. He was on triple immuno-suppression therapy consisting of prednisolone, tacrolimus, and mycophenolate mofetil. He presented with anemia which persisted for more than two months that did not improve with Darbepoetin alpha and required blood transfusions. A bone marrow biopsy demonstrated pure erythroid hypoplasia and occasional giant pronormoblasts characteristic of a ParvoV B19 infection. The serum was highly positive for ParvoV B19 DNA polymerase chain reaction. The anemia resolved completely three weeks after the administration of intravenous immunoglobulin. ParvoV B19 infection should be considered in the differential diagnosis of kidney transplant recipients who present with anemia associated with a low reticulocyte count.
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Affiliation(s)
| | - Amitabh Jha
- Department of Nephrology, Royal Hospital, Muscat, Oman
| | - Issa Al Salmi
- Department of Nephrology, Royal Hospital, Muscat, Oman
| | | | | | | | - Jalila Mohsin
- Department of Microbiology, Royal Hospital, Muscat, Oman
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17
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Thomas J, Singh M, Goswami TK, Glora P, Chakravarti S, Chander V, Upmanyu V, Verma S, Sharma C, Mahendran K. Determination of immune status in dogs against CPV-2 by recombinant protein based latex agglutination test. Biologicals 2017; 49:51-56. [PMID: 28689674 DOI: 10.1016/j.biologicals.2017.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 06/24/2017] [Accepted: 06/27/2017] [Indexed: 11/19/2022] Open
Abstract
Canine parvoviral enteritis is a highly contagious viral illness caused by canine parvovirus-2 (CPV-2) which affects puppies of mainly 6-20 weeks of age. Vaccination is pivotal in preventing and controlling CPV-2 infection. Determination of antibody status is a critical determinant for successful vaccination. The hemagglutination inhibition (HI) test is 'gold standard' test for quantification of antibodies specific to CPV-2, although the execution of this test is not feasible under field conditions. The present study was undertaken to develop a point of care testing to determine immune status prior to CPV-2 vaccination or to detect seroconversion in immunized dogs by latex agglutination test (LAT) using recombinant antigen. Truncated portion of VP2 protein (tVP2) of CPV-2 was selected on the basis of antigenic indices, overexpressed the recombinant protein in E. coli system and was subsequently used in development of LAT. A total of 59 serum samples obtained from vaccinated (n = 54) and healthy unvaccinated (n = 5) dogs were tested. The positivity was observed in 85% (46/54) of these dogs with varying agglutination pattern. The overall sensitivity and specificity of latex agglutination test in comparison to HI test was recorded as 90% and 88% respectively with an agreement value of 90% (CI = 95%).
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Affiliation(s)
- Jobin Thomas
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Mithilesh Singh
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India.
| | - T K Goswami
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Philma Glora
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Soumendu Chakravarti
- Biological Product Division, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Vishal Chander
- CADRAD, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Vikramaditya Upmanyu
- Biological Standardization Division, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Suman Verma
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - Chhavi Sharma
- Immunology Section, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
| | - K Mahendran
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar Bareilly, 243122, India
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18
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Abstract
Parvovirus B19 (B19V) and human bocavirus 1 (HBoV1), members of the large Parvoviridae family, are human pathogens responsible for a variety of diseases. For B19V in particular, host features determine disease manifestations. These viruses are prevalent worldwide and are culturable in vitro, and serological and molecular assays are available but require careful interpretation of results. Additional human parvoviruses, including HBoV2 to -4, human parvovirus 4 (PARV4), and human bufavirus (BuV) are also reviewed. The full spectrum of parvovirus disease in humans has yet to be established. Candidate recombinant B19V vaccines have been developed but may not be commercially feasible. We review relevant features of the molecular and cellular biology of these viruses, and the human immune response that they elicit, which have allowed a deep understanding of pathophysiology.
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Affiliation(s)
- Jianming Qiu
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | | | - Neal S Young
- Hematology Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
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19
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Abstract
Pure red cell aplasia (PRCA) is a syndrome defined by a normocytic normochromic anemia with severe reticulocytopenia and marked reduction or absence of erythroid precursors from the bone marrow. Diamond-Blackfan anemia is a congenital form of PRCA. Acquired PRCA may be either a primary disorder or secondary to some other disorder or agent. Primary acquired PRCA is an autoimmune disorder that is frequently antibody-mediated. Myelodysplastic syndromes may also present with the morphologic appearance of PRCA. Secondary acquired PRCA may be associated with collagen vascular/autoimmune disorders such as systemic lupus erythematosus; lymphoproliferative disorders such as chronic lymphocytic leukemia or large granular lymphocyte leukemia; infections, particularly B19 parvovirus; thymoma and other solid tumors; or a variety of other disorders, drugs, or toxic agents. The therapeutic approach to PRCA typically involves immunosuppression, but specific pathogenic subtypes are associated with specific therapeutic approaches. Cyclosporine A, with or without concurrent corticosteroids, appears to be the single most effective immunosuppressive agent.
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MESH Headings
- Adrenal Cortex Hormones/therapeutic use
- Anemia, Diamond-Blackfan/drug therapy
- Anemia, Diamond-Blackfan/immunology
- Anemia, Diamond-Blackfan/pathology
- Autoimmune Diseases/drug therapy
- Autoimmune Diseases/immunology
- Autoimmune Diseases/pathology
- Cyclosporine/therapeutic use
- Humans
- Immunosuppressive Agents/therapeutic use
- Leukemia, Large Granular Lymphocytic/drug therapy
- Leukemia, Large Granular Lymphocytic/immunology
- Leukemia, Large Granular Lymphocytic/pathology
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Myelodysplastic Syndromes/drug therapy
- Myelodysplastic Syndromes/etiology
- Myelodysplastic Syndromes/immunology
- Myelodysplastic Syndromes/pathology
- Parvoviridae Infections/drug therapy
- Parvoviridae Infections/immunology
- Parvoviridae Infections/pathology
- Parvovirus B19, Human/immunology
- Thymoma/drug therapy
- Thymoma/immunology
- Thymoma/pathology
- Vasculitis/drug therapy
- Vasculitis/immunology
- Vasculitis/pathology
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Affiliation(s)
- Robert T Means
- Office of the Dean, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, TN
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20
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Waner T, Mazar S, Keren-Kornblatt E. Application of a Dot Enzyme-Linked Immunosorbent Assay for Evaluation of the Immune Status to Canine Parvovirus and Distemper Virus in Adult Dogs before Revaccination. J Vet Diagn Invest 2016; 18:267-70. [PMID: 16789715 DOI: 10.1177/104063870601800306] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A growing body of literature has been published indicating that the current practice of annual vaccination of dogs may not be beneficial and in some cases may even be harmful. A number of publications have proposed assessing the immune status of dogs before annual revaccination. In this study the usefulness of a commercially available dot-ELISA kit was evaluated to determine the duration IgG antibody titers to canine parvovirus (CPV) and canine distemper virus (CDV) in 158 dogs vaccinated at least one year ago. Overall, the percentage of dogs with protective antibody titers to both CPV and CDV was 84%. The percentage of dogs with borderline antibody titers was 11% for CPV and 10% for CDV. Four percent of the dogs had no detectable antibody to CPV and 6% had no antibody to CDV. The results reported here are in good agreement with other studies measuring IgG antibody levels. It is concluded that the kit offers veterinarians the opportunity of determining antibody titers and revaccinating only those pets whose antibody titers to specific diseases have waned.
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Affiliation(s)
- Trevor Waner
- Israel Institute for Biological Research, P.O. Box 19, Ness Ziona, 70400, Israel.
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21
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Kendall LV, Allaband C, Henderson KS. Pre-Natal Exposure to Mouse Parvovirus at Day 5 and 12 Gestation Does Not Induce Immune Tolerance. PLoS One 2016; 11:e0156248. [PMID: 27219540 PMCID: PMC4878799 DOI: 10.1371/journal.pone.0156248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 05/11/2016] [Indexed: 11/24/2022] Open
Abstract
Parvoviruses have a predilection for rapidly dividing cells such as occurs during embryonic development. Potentially, in utero exposure could lead to immune tolerance in progeny mice. To determine if MPV infection in utero results in immune tolerance, pregnant mice were inoculated by oral gavage with 50 ID50 MPV1e or sham inoculated with phosphate buffered saline at day 5 and 12 gestation. Offspring were fostered to MPV-negative recipient dams prior to development of a milk spot. After confirming the offspring were seronegative for MPV by serology and not shedding by fecal PCR, they were challenged with 50 ID50 MPV1e by oral gavage at weaning or sham inoculated. At 4 weeks post inoculation, all weanlings exposed in utero developed antibodies to MPV, and MPV was detected by fecal PCR. Similarly, all weanlings from sham-inoculated dams challenged with MPV developed antibodies and MPV was detected by fecal PCR. None of the sham inoculated weanling mice from MPV infected dams or sham infected dams developed antibodies to MPV nor was MPV detected by fecal PCR. These results demonstrate that in utero exposure to MPV1e via oral gavage was insufficient to induce immune tolerance and provides greater confidence that rederivation techniques may successfully eliminate colonies of MPV. Furthermore, our findings do not provide evidence that MPV tolerance may contribute to hidden infections in mouse colonies.
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Affiliation(s)
- Lon V. Kendall
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
- * E-mail:
| | - Celeste Allaband
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
| | - Kenneth S. Henderson
- Charles River Laboratories International, Wilmington, Massachusetts, United States of America
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22
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Palermo CI, Costanzo CM, Franchina C, Castiglione G, Giuliano L, Russo R, Conti A, Sofia V, Scalia G. Focal epilepsy as a long term sequela of Parvovirus B19 encephalitis. J Clin Virol 2016; 80:20-3. [PMID: 27130981 DOI: 10.1016/j.jcv.2016.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/19/2022]
Abstract
Human Parvovirus B19 (PVB19), the etiological agent of the fifth disease, is associated with a large spectrum of pathologies, among which is encephalitis. Since it has been detected from the central nervous system in children or in immunocompromised patients, its causative role in serious neurological manifestations is still unclear. Here we report the case of an 18-year-old healthy boy who developed encephalitis complicated by prolonged status epilepticus. The detection of PVB19 DNA in his serum and, subsequently, in his cerebrospinal fluid supports the hypothesis that this virus could potentially play a role in the pathogenesis of neurological complications. In addition, the detection of viral DNA and the presence of specific IgM and IgG antibodies in serum, together with clinical findings such as skin rash, support the presence of a disseminated viral infection. In the presence of neurological disorders, especially when there are no specific signs, but seizures and rash are present, it is important to search for PVB19 both in immunocompromised and immunocompetent patients. Moreover, the introduction of the PVB19 DNA test into diagnostic protocols of neuropathies, especially those undiagnosed, could clarify the etiological agent that otherwise could remain unrecognized.
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Affiliation(s)
- Concetta Ilenia Palermo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy; O.U. Central Laboratory, Clinical Virology Unit, A.O.U Policlinico-Vittorio Emanuele, O.P "Gaspare Rodolico", Catania, Italy.
| | - Carmela Maria Costanzo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy; O.U. Central Laboratory, Clinical Virology Unit, A.O.U Policlinico-Vittorio Emanuele, O.P "Gaspare Rodolico", Catania, Italy
| | - Concetta Franchina
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy; O.U. Central Laboratory, Clinical Virology Unit, A.O.U Policlinico-Vittorio Emanuele, O.P "Gaspare Rodolico", Catania, Italy
| | - Giacomo Castiglione
- O.U. Intensive Care, A.O.U Policlinico-Vittorio Emanuele, O.P "Vittorio Emanuele II", Catania, Italy
| | - Loretta Giuliano
- Department "G. F. Ingrassia", Section of Neurosciences, University of Catania, Italy
| | - Raffaela Russo
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy; O.U. Central Laboratory, Clinical Virology Unit, A.O.U Policlinico-Vittorio Emanuele, O.P "Gaspare Rodolico", Catania, Italy
| | - Alessandro Conti
- O.U. Intensive Care, A.O.U Policlinico-Vittorio Emanuele, O.P "Vittorio Emanuele II", Catania, Italy
| | - Vito Sofia
- Department "G. F. Ingrassia", Section of Neurosciences, University of Catania, Italy
| | - Guido Scalia
- Department of Biomedical and Biotechnological Sciences, University of Catania, Italy; O.U. Central Laboratory, Clinical Virology Unit, A.O.U Policlinico-Vittorio Emanuele, O.P "Gaspare Rodolico", Catania, Italy
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23
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Cságola A, Zádori Z, Mészáros I, Tuboly T. Detection of Porcine Parvovirus 2 (Ungulate Tetraparvovirus 3) Specific Antibodies and Examination of the Serological Profile of an Infected Swine Herd. PLoS One 2016; 11:e0151036. [PMID: 26974825 PMCID: PMC4790921 DOI: 10.1371/journal.pone.0151036] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 02/22/2016] [Indexed: 01/15/2023] Open
Abstract
Porcine parvovirus 2 (PPV2) is a member of a recently discovered group of swine parvoviruses occurring worldwide. It is frequently detected in lung samples suggesting some pathological role of the virus in diseases. To study this possibility an indirect ELISA was developed to detect PPV2 specific antibodies and to examine the serological profile of an infected swine herd where 185 serum samples collected from different age groups including sows were analyzed. According to the results maternal antibody levels decreased until 14 days of age and PPV2 specific antibodies started to rise between 28 to 43 days of age when respiratory signs were also observed in the examined swine herd. At 57 days of age the clinical signs disappeared and a rapid increase of PPV2 specific antibody levels could be measured simultaneously, peaking at 57 days of age. The viraemic status of different age groups was determined by qPCR using serum samples. At least a low level of viraemia was measured in every age group, but higher copy number of PPV2 was only detected at 57 days of age and the level decreased in older age groups. The changes in virus load and antibody levels together with the onset and decrease of clinical signs suggested that PPV2 had a role in the development of respiratory signs.
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Affiliation(s)
- Attila Cságola
- Department of Microbiology and Infectious Diseases, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
- * E-mail:
| | - Zoltán Zádori
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, Hungary
| | - István Mészáros
- Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, Budapest, Hungary
| | - Tamás Tuboly
- Department of Microbiology and Infectious Diseases, Faculty of Veterinary Science, Szent István University, Budapest, Hungary
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24
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Iida T, Satoh S, Nakagaki S, Shimizu H, Kaneto H. Autoimmune Hemolytic Anemia Triggered by Infection with Human Parvovirus B19 after Total Abdominal Colectomy for Ulcerative Colitis. Intern Med 2016; 55:677-81. [PMID: 26984090 DOI: 10.2169/internalmedicine.55.5657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 50-year-old man was admitted to our hospital for an adhesive ileus 14 years after total abdominal colectomy for ulcerative colitis (UC). The ileus decreased with conservative treatment, however, autoimmune hemolytic anemia (AIHA) was diagnosed due to worsening anemia, a positive direct Coombs test, low haptoglobin, high lactase dehydrogenase, reticulocytosis, and an increase in the erythroblastic series in a bone-marrow examination. Human parvovirus B19 (PV-B19) IgM and PV-B19 DNA were present, indicating the development of AIHA triggered by an infection with PV-B19. The patient is currently being monitored after spontaneous remission. This is the first report of UC after total abdominal colectomy complicated by AIHA triggered by PV-B19 infection.
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Affiliation(s)
- Tomoya Iida
- Department of Gastroenterology, Muroran City General Hospital, Japan
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25
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Matthews PC, Sharp CP, Malik A, Gregory WF, Adland E, Jooste P, Goulder PJR, Simmonds P, Klenerman P. Human parvovirus 4 infection among mothers and children in South Africa. Emerg Infect Dis 2015; 21:713-5. [PMID: 25812109 PMCID: PMC4378500 DOI: 10.3201/eid2104.141545] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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26
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Abstract
Apolipoprotein B editing complex 3 family members are cytidine deaminases that play important roles in intrinsic responses to infection by retroviruses and have been implicated in the control of other viruses, such as parvoviruses, herpesviruses, papillomaviruses, hepatitis B virus, and retrotransposons. Although their direct effect on modification of viral DNA has been clearly demonstrated, whether they play additional roles in innate and adaptive immunity to viruses is less clear. We review the data regarding the various steps in the innate and adaptive immune response to virus infection in which apolipoprotein B editing complex 3 proteins have been implicated.
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Affiliation(s)
- Spyridon Stavrou
- Department of Microbiology, Abramson Cancer Center, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6142
| | - Susan R Ross
- Department of Microbiology, Abramson Cancer Center, Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6142
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27
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Kantola K, Hedman L, Tanner L, Simell V, Mäkinen M, Partanen J, Sadeghi M, Veijola R, Knip M, Ilonen J, Hyöty H, Toppari J, Simell O, Hedman K, Söderlund-Venermo M. B-Cell Responses to Human Bocaviruses 1-4: New Insights from a Childhood Follow-Up Study. PLoS One 2015; 10:e0139096. [PMID: 26418064 PMCID: PMC4587975 DOI: 10.1371/journal.pone.0139096] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 09/08/2015] [Indexed: 01/04/2023] Open
Abstract
Human bocaviruses (HBoVs) 1-4 are recently discovered, antigenically similar parvoviruses. We examined the hypothesis that the antigenic similarity of these viruses could give rise to clinically and diagnostically important immunological interactions. IgG and IgM EIAs as well as qPCR were used to study ~2000 sera collected from infancy to early adolescence at 3-6-month intervals from 109 children whose symptoms were recorded. We found that HBoV1-4-specific seroprevalences at age 6 years were 80%, 48%, 10%, and 0%, respectively. HBoV1 infections resulted in significantly weaker IgG responses among children who had pre-existing HBoV2 IgG, and vice versa. Furthermore, we documented a complete absence of virus type-specific immune responses in six viremic children who had pre-existing IgG for another bocavirus, indicating that not all HBoV infections can be diagnosed serologically. Our results strongly indicate that interactions between consecutive HBoV infections affect HBoV immunity via a phenomenon called "original antigenic sin", cross-protection, or both; however, without evident clinical consequences but with important ramifications for the serodiagnosis of HBoV infections. Serological data is likely to underestimate human exposure to these viruses.
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Affiliation(s)
- Kalle Kantola
- University of Helsinki, Department of Virology, Helsinki, Finland
- * E-mail:
| | - Lea Hedman
- University of Helsinki, Department of Virology, Helsinki, Finland
- Helsinki University Hospital Laboratory Services, Helsinki, Finland
| | - Laura Tanner
- Turku University Hospital, Department of Pediatrics, Turku, Finland
| | | | | | - Juulia Partanen
- University of Helsinki, Department of Virology, Helsinki, Finland
| | | | - Riitta Veijola
- University of Oulu, Department of Pediatrics, Oulu, Finland
| | - Mikael Knip
- University of Helsinki and Helsinki University Hospital, Children's Hospital and Research Programs Unit, Diabetes and Obesity, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
- Tampere University Hospital, Tampere Center for Child Health Research, Tampere, Finland
| | - Jorma Ilonen
- Turku University Hospital, Department of Pediatrics, Turku, Finland
- Medicity, University of Turku, Turku, Finland
- University of Eastern Finland, Department of Clinical Microbiology, Kuopio, Finland
- University of Turku, Immunogenetics Laboratory, Turku, Finland
| | - Heikki Hyöty
- University of Tampere, Department of Virology, Tampere, Finland
| | - Jorma Toppari
- Turku University Hospital, Department of Pediatrics, Turku, Finland
- Medicity, University of Turku, Turku, Finland
| | - Olli Simell
- Medicity, University of Turku, Turku, Finland
| | - Klaus Hedman
- University of Helsinki, Department of Virology, Helsinki, Finland
- Helsinki University Hospital Laboratory Services, Helsinki, Finland
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28
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Bondarenko NP, Lakatosh VP, Lakatosh PV, Malanchuk OB, Poladich IV. [DIAGNOSTIC VALUE OF COMBINED USE OF COMBINED METHOD OF ENZYME IMMUNOASSAY AND POLYMERASE CHAIN REACTION TO DETECT OF INTRAUTERINE FETAL INFECTION BY PARVOVIRUS B19]. Lik Sprava 2015:121-128. [PMID: 26827452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The combined method of diagnosis parvovirus infection during pregnancy by maternal serum enzyme immunoassay and deoxyribonucleic acid isolation parvovirus B19 polymerase chain reaction in amnniotic fluid and fetal cord blood newborns, can diagnose vertical transmission and anticipate a negative effect on the fetus parvovirus. Lack of maternal IgM antibodies in serum due to parvovirus seroconversion during pregnancy does not exclude the persistence of the virus in the fetus. To analyze the diagnostic value of the method for determining the LHP parvovirus B19 DNA in the amniotic fluid, umbilical cord blood of newborns to determine vertical transmission of parvovirus infection when infected mothers B19 during pregnancy.
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MESH Headings
- Adult
- Amniotic Fluid/chemistry
- Antibodies, Viral/biosynthesis
- DNA, Viral/analysis
- DNA, Viral/genetics
- Female
- Fetal Blood/chemistry
- Fetal Diseases/diagnosis
- Fetal Diseases/immunology
- Fetal Diseases/mortality
- Fetus
- Humans
- Immunoenzyme Techniques
- Immunoglobulin M/biosynthesis
- Infant, Newborn
- Infectious Disease Transmission, Vertical
- Parvoviridae Infections/diagnosis
- Parvoviridae Infections/immunology
- Parvoviridae Infections/mortality
- Parvoviridae Infections/transmission
- Parvovirus B19, Human/genetics
- Parvovirus B19, Human/immunology
- Polymerase Chain Reaction
- Pregnancy
- Pregnancy Complications, Infectious/diagnosis
- Pregnancy Complications, Infectious/immunology
- Pregnancy Complications, Infectious/virology
- Seroconversion
- Survival Analysis
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29
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Geletneky K, Leoni AL, Pohlmeyer-Esch G, Loebhard S, Baetz A, Leuchs B, Roscher M, Hoefer C, Jochims K, Dahm M, Huber B, Rommelaere J, Krebs O, Hajda J. Pathology, organ distribution, and immune response after single and repeated intravenous injection of rats with clinical-grade parvovirus H1. Comp Med 2015; 65:23-35. [PMID: 25730754 PMCID: PMC4396926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/24/2013] [Accepted: 03/19/2014] [Indexed: 06/04/2023]
Abstract
Parvovirus H1 (H1PV) is an autonomous parvovirus that is transmitted in rodent populations. Its natural host is rats. H1PV infection is nonpathogenic except in rat and hamster fetuses and newborns. H1PV infection of human cancer cells caused strong oncolytic effects in preclinical models. For a clinical trial of H1PV in patients with brain tumors, clinical-grade H1PV was produced according to Good Manufacturing Practices. This report focuses on results obtained after a single high-dose intravenous injection of highly purified H1PV in 30 rats and multiple (n = 17) intravenous injections at 3 dose levels in 223 rats. In both studies, no virus-related mortality or macroscopic organ changes related to H1PV occurred. Histopathology after multiple virus injections revealed minimal diffuse bile duct hyperplasia in livers of animals of the highest dose group and germinal center development in spleens of animals from the high-dose group. Liver changes were reversible within a 2-wk recovery period after the last injection. Hematology, blood chemistry, and coagulation analyses did not reveal significant toxicologic changes due to H1PV. Virus injection stimulated the production of IgG antibodies but did not alter mononuclear cell function or induce cytokine release. PCR analysis showed dose-dependent levels of viral genomes in all organs tested. The virus was excreted primarily through feces. These data provide important information regarding H1PV infection in its natural host. Due to the confirmation of the favorable safety profile of H1PV in a permissive animal model, a phase I/IIa clinical trial of H1PV in brain tumor patients could be initiated.
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Affiliation(s)
- Karsten Geletneky
- Department of Neurosurgery, University Hospital, Heidelberg, Germany; Department of Applied Tumor Virology, German Cancer Research Center, Heidelberg, Germany.
| | - Anne-Laure Leoni
- BSL BIOSERVICE Scientific Laboratories GmbH, Planegg, Munich, Germany
| | | | | | - Andrea Baetz
- BSL BIOSERVICE Scientific Laboratories GmbH, Planegg, Munich, Germany
| | - Barbara Leuchs
- Department of Applied Tumor Virology, German Cancer Research Center, Heidelberg, Germany
| | - Mandy Roscher
- Department of Applied Tumor Virology, German Cancer Research Center, Heidelberg, Germany
| | | | | | | | | | - Jean Rommelaere
- Department of Applied Tumor Virology, German Cancer Research Center, Heidelberg, Germany
| | | | - Jacek Hajda
- Coordination Center for Clinical Trials, University Hospital, Heidelberg, Germany
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30
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Hirose Y, Hamada H, Wakui T, Ogawa T, Terai M. Characteristic systemic cytokine responses in children with human bocavirus-positive lower respiratory tract infection. Microbiol Immunol 2014; 58:215-8. [PMID: 24593186 DOI: 10.1111/1348-0421.12145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To investigate systemic cytokine responses in human bocavirus (HBoV)-associated lower respiratory tract infection, serum cytokine profiles were analyzed in HBoV positive-children (n=14) using multiplex immunoassay. Concentrations of TNF-a, IL-2, IL-5 and IL-8 on admission were significantly different from those of respiratory syncytial virus-positive children (n=28). This unique cytokine response might partly explain some characteristic clinical features of HBoV-associated respiratory infection.
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31
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O'Grady JS. Fifth and sixth diseases: more than a fever and a rash. J Fam Pract 2014; 63:E1-E5. [PMID: 25343159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
While most parvovirus B19 or HHV-6 infections resolve without sequelae, rheumatologic and hemolytic complications and seizures can develop.
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Affiliation(s)
- Jason S O'Grady
- Department of Family Medicine, Mayo Clinic, Rochester, MN, USA.
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32
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Sekiguchi Y, Shimada A, Imai H, Wakabayashi M, Sugimoto K, Nakamura N, Sawada T, Komatsu N, Noguchi M. A case of recurrent autoimmune hemolytic anemia during remission associated with acute pure red cell aplasia and hemophagocytic syndrome due to human parvovirus B19 infection successfully treated by steroid pulse therapy with a review of the literature. Int J Clin Exp Pathol 2014; 7:2624-2635. [PMID: 24966977 PMCID: PMC4069955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 04/10/2014] [Indexed: 06/03/2023]
Abstract
The patient was a 47-year-old man diagnosed as having autoimmune hemolytic anemia (AIHA) in April 2011. He also had a congenital chromosomal abnormality, a balanced translocation. Treatment with prednisolone (PSL) 60 mg/day resulted in resolution of the AIHA, and the treatment was completed in November 2011. While the patient no longer had anemia, the direct and indirect Coombs tests remained positive. In May 2013, he developed recurrent AIHA associated with acute pure red cell aplasia (PRCA) and hemophagocytic syndrome (HPS) caused by human parvovirus B19 (HPV B19) infection. Tests for anti-erythropoietin and anti-erythropoietin receptor antibodies were positive. Steroid pulse therapy resulted in resolution of the AIHA, PRCA, as well as HPS. The serum test for anti-erythropoietin antibodies also became negative after the treatment. However, although the serum was positive for anti-HPV B19 IgG antibodies, the patient continued to have a low CD4 lymphocyte count (CD4, <300/μL) and persistent HPV B19 infection (HPV B19 DNA remained positive), suggesting the risk of recurrence and bone marrow failure.
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MESH Headings
- Acute Disease
- Adolescent
- Adult
- Aged
- Anemia, Hemolytic, Autoimmune/blood
- Anemia, Hemolytic, Autoimmune/diagnosis
- Anemia, Hemolytic, Autoimmune/drug therapy
- Anemia, Hemolytic, Autoimmune/immunology
- Anemia, Hemolytic, Autoimmune/virology
- Biomarkers/blood
- Bone Marrow Examination
- CD4 Lymphocyte Count
- Child
- Female
- Glucocorticoids/administration & dosage
- Humans
- Infant
- Lymphohistiocytosis, Hemophagocytic/blood
- Lymphohistiocytosis, Hemophagocytic/diagnosis
- Lymphohistiocytosis, Hemophagocytic/drug therapy
- Lymphohistiocytosis, Hemophagocytic/immunology
- Lymphohistiocytosis, Hemophagocytic/virology
- Male
- Middle Aged
- Parvoviridae Infections/blood
- Parvoviridae Infections/diagnosis
- Parvoviridae Infections/drug therapy
- Parvoviridae Infections/immunology
- Parvoviridae Infections/virology
- Parvovirus B19, Human/immunology
- Parvovirus B19, Human/pathogenicity
- Prednisolone/administration & dosage
- Pulse Therapy, Drug
- Recurrence
- Red-Cell Aplasia, Pure/blood
- Red-Cell Aplasia, Pure/diagnosis
- Red-Cell Aplasia, Pure/drug therapy
- Red-Cell Aplasia, Pure/immunology
- Red-Cell Aplasia, Pure/virology
- Remission Induction
- Serologic Tests
- Time Factors
- Tomography, X-Ray Computed
- Treatment Outcome
- Young Adult
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Affiliation(s)
| | - Asami Shimada
- Department of Hematology, Juntendo University Urayasu HospitalJapan
| | | | | | - Keiji Sugimoto
- Department of Hematology, Juntendo University Urayasu HospitalJapan
| | - Noriko Nakamura
- Department of Clinical Laboratory, Juntendo University Urayasu HospitalJapan
| | - Tomohiro Sawada
- Department of Clinical Laboratory, Juntendo University Urayasu HospitalJapan
| | - Norio Komatsu
- Department of Hematology, Juntendo University HospitalJapan
| | - Masaaki Noguchi
- Department of Hematology, Juntendo University Urayasu HospitalJapan
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Jupatanakul N, Sim S, Dimopoulos G. Aedes aegypti ML and Niemann-Pick type C family members are agonists of dengue virus infection. Dev Comp Immunol 2014; 43:1-9. [PMID: 24135719 PMCID: PMC3935818 DOI: 10.1016/j.dci.2013.10.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/02/2013] [Accepted: 10/03/2013] [Indexed: 05/07/2023]
Abstract
Upon exposure to dengue virus, the Aedes aegypti mosquito vector mounts an anti-viral immune defense by activating the Toll, JAK/STAT, and RNAi pathways, thereby limiting infection. While these pathways and several other factors have been identified as dengue virus antagonists, our knowledge of factors that facilitate dengue virus infection is limited. Previous dengue virus infection-responsive transcriptome analyses have revealed an increased mRNA abundance of members of the myeloid differentiation 2-related lipid recognition protein (ML) and the Niemann Pick-type C1 (NPC1) families upon dengue virus infection. These genes encode lipid-binding proteins that have been shown to play a role in host-pathogen interactions in other organisms. RNAi-mediated gene silencing of a ML and a NPC1 gene family member in both laboratory strain and field-derived Ae. aegypti mosquitoes resulted in significantly elevated resistance to dengue virus in mosquito midguts, suggesting that these genes play roles as dengue virus agonists. In addition to their possible roles in virus cell entry and replication, gene expression analyses suggested that ML and NPC1 family members also facilitate viral infection by modulating the mosquito's immune competence. Our study suggests that the dengue virus influences the expression of these genes to facilitate its infection of the mosquito host.
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Affiliation(s)
- Natapong Jupatanakul
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe St., Baltimore, MD 21205, USA
| | - Shuzhen Sim
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe St., Baltimore, MD 21205, USA
| | - George Dimopoulos
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, 615 N. Wolfe St., Baltimore, MD 21205, USA.
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Berrevoets MAH, van der Post RS, Schaap N. A patient with pure red cell aplasia after allogenic stem-cell transplantation. Parvo B19 infection. Neth J Med 2013; 71:370-374. [PMID: 24038564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- M A H Berrevoets
- Department of Haematology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands
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35
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Macy JD, Paturzo FX, Compton SR. Effect of immunodeficiency on MPV shedding and transmission. J Am Assoc Lab Anim Sci 2013; 52:467-74. [PMID: 23849445 PMCID: PMC3725932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 02/22/2013] [Accepted: 03/09/2013] [Indexed: 06/02/2023]
Abstract
C57BL/6 (B6) mice briefly shed low levels of MPV, and transmission is inefficient. To determine whether deficits in B or T cells or in interferon γ on a B6 background increased the duration of MPV shedding or transmission, B-cell-deficient (Igh), interferon-γ-deficient (Ifnγ), B- and T-cell-deficient (Rag), and B6 mice were inoculated with MPV. At 1 and 2 wk postinoculation (wpi), 11% to 94% of mice shed MPV. From 4 to 18 wpi, 80% to 100% of Rag mice and 0% of B6 and Ifnγ mice shed MPV; Igh mice sporadically shed MPV through 20 wpi. MPV was transmitted from B6 mice and Ifnγ mice at 2 to 4 wpi. Rag and Igh mice transmitted MPV to sentinels at all or most time points, respectively, between 2 to 16 wpi. Once transmission ceased from B6, Ifnγ, and Igh mice, breeding trios were setup and showed that MPV was transmitted to offspring in only one cage of Igh mice. In another experiment, MPV shedding ceased from B6, CD8-deficient (CD8), CD4-deficient (CD4), and T-cell-receptor-deficient (TCR) mice by 2, 6, 8, and 8 wpi, respectively. MPV was transmitted to sentinels only at 1 to 4 wpi. Mesenteric lymph nodes collected from 61% to 100% of B6, Ifnγ, TCR, CD4, CD8, and Rag mice were MPV DNA-positive. In conclusion, MPV transmission did not differ between mice deficient in T cell functions or Ifnγ and B6 mice. In contrast, B-cell deficiency posed an increased risk for MPV transmission in mice.
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Key Words
- b6, c57bl/6j mice
- cd4, b6.129s2-cd4tm1mak/j mice
- cd8, b6.129s2-cd8atm1mak/j mice
- igh, b6.129s2-ighmtm1cgn/j mice
- ifnγ , b6.129s7-ifngtm1ts/j mice
- mln, mesenteric lymph nodes
- mpv, mouse parvovirus
- rag, b6.129s7-rag1tm1mom/j mice
- tcr, b6.129p2-tcrbtm1mom/j mice
- wpi, weeks post-inoculation
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Affiliation(s)
- James D Macy
- Section of Comparative Medicine, School of Medicine, Yale University, New Haven, CT, USA.
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36
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Moroncini G, Mori S, Tonnini C, Gabrielli A. Role of viral infections in the etiopathogenesis of systemic sclerosis. Clin Exp Rheumatol 2013; 31:3-7. [PMID: 23910606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 06/26/2013] [Indexed: 06/02/2023]
Abstract
Systemic sclerosis or scleroderma (SSc) is a clinically heterogeneous disease of the connective tissue characterised by vascular, immune/inflammatory and fibrotic manifestations. Despite extensive investigations, the key pathogenic links between these disease hallmarks remain obscure, as well as the etiology underlying the beginning of this complex disorder. As for other diseases characterised by prominent autoimmune phenomena, the search for infectious agents responsible for immune tolerance breaks or molecular mimicry events has been a long-pursued issue. In this review, we summarise the current knowledge regarding the association of different viral infections with SSc, focusing mainly on those reports describing a mechanistic interplay between the viral agents and the pathogenesis of SSc. Moreover, we speculate on how viral infections may trigger additional pathogenic mechanisms recently proposed to contributing to SSc phenotype.
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Affiliation(s)
- Gianluca Moroncini
- Dipartimento di Scienze Cliniche e Molecolari, Università Politecnica delle Marche, and Clinica Medica, Ospedali Riuniti, Ancona, Italy.
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Thammasri K, Rauhamäki S, Wang L, Filippou A, Kivovich V, Marjomäki V, Naides SJ, Gilbert L. Human parvovirus B19 induced apoptotic bodies contain altered self-antigens that are phagocytosed by antigen presenting cells. PLoS One 2013; 8:e67179. [PMID: 23776709 PMCID: PMC3680405 DOI: 10.1371/journal.pone.0067179] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 05/15/2013] [Indexed: 12/03/2022] Open
Abstract
Human parvovirus B19 (B19V) from the erythrovirus genus is known to be a pathogenic virus in humans. Prevalence of B19V infection has been reported worldwide in all seasons, with a high incidence in the spring. B19V is responsible for erythema infectiosum (fifth disease) commonly seen in children. Its other clinical presentations include arthralgia, arthritis, transient aplastic crisis, chronic anemia, congenital anemia, and hydrops fetalis. In addition, B19V infection has been reported to trigger autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. However, the mechanisms of B19V participation in autoimmunity are not fully understood. B19V induced chronic disease and persistent infection suggests B19V can serve as a model for viral host interactions and the role of viruses in the pathogenesis of autoimmune diseases. Here we investigate the involvement of B19V in the breakdown of immune tolerance. Previously, we demonstrated that the non-structural protein 1 (NS 1) of B19V induces apoptosis in non-permissive cells lines and that this protein can cleave host DNA as well as form NS1-DNA adducts. Here we provide evidence that through programmed cell death, apoptotic bodies (ApoBods) are generated by B19V NS1 expression in a non-permissive cell line. Characterization of purified ApoBods identified potential self-antigens within them. In particular, signature self-antigens such as Smith, ApoH, DNA, histone H4 and phosphatidylserine associated with autoimmunity were present in these ApoBods. In addition, when purified ApoBods were introduced to differentiated macrophages, recognition, engulfment and uptake occurred. This suggests that B19V can produce a source of self-antigens for immune cell processing. The results support our hypothesis that B19V NS1-DNA adducts, and nucleosomal and lysosomal antigens present in ApoBods created in non-permissive cell lines, are a source of self-antigens.
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Affiliation(s)
- Kanoktip Thammasri
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Sanna Rauhamäki
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Liping Wang
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Artemis Filippou
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Violetta Kivovich
- Pennsylvania State College of Medicine/Milton S. Hershey Medical Center, Hershey, Pennsylvania, United States of America
| | - Varpu Marjomäki
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Stanley J. Naides
- Quest Diagnostics Nichols Institute, San Juan Capistrano, California, United States of America
| | - Leona Gilbert
- Department of Biological and Environmental Sciences and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
- * E-mail:
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Narushima R, Ogawa T, Shimazaki T. Endogenous feline retrovirus RD-114 does not elicit neutralizing antibodies in dogs. Acta Virol 2012; 56:343-4. [PMID: 23237091 DOI: 10.4149/av_2012_04_343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lin W, Qiu Z, Liu Q, Cui S. Interferon induction and suppression in swine testicle cells by porcine parvovirus and its proteins. Vet Microbiol 2012; 163:157-61. [PMID: 23333362 DOI: 10.1016/j.vetmic.2012.11.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 11/21/2012] [Accepted: 11/22/2012] [Indexed: 12/25/2022]
Abstract
Porcine parvovirus (PPV) is a major causative agent of reproductive failure in swine, which currently affects the swine industry worldwide. Although PPV was identified several years ago, little is known about how it overcomes host innate immunity. In this study, we used quantitative real-time PCR and a luciferase reporter assay to determine whether PPV infection induces type I interferon (IFN-α and IFN-β) and whether PPV infection blocks dsRNA-induced IFN-β promoter activation in cell cultures. The results indicate that PPV does not induce type I interferon and that the NS2 protein of PPV could blocks dsRNA-induced IFN-β promoter activation.
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Affiliation(s)
- Wencheng Lin
- Division of Swine Infectious Diseases, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, 427 Maduan Street, Nangang District, Harbin 150001 Heilongjiang, China
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40
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Chen H, Zhong F, Li X, Wang L, Sun Y, Neng C, Zhang K, Li W, Wen J. [Effects of canine IL-2 and IL-7 genes on enhancing immunogenicity of canine parvovirus VP2 gene vaccine in mice]. Wei Sheng Wu Xue Bao 2012; 52:1392-1399. [PMID: 23383511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To investigate the effects of canine interleukin-2 (cIL-2) and cIL-7 genes on enhancing the immunogenicity of canine parvovirus (CPV) VP2 DNA vaccine. METHODS The bicistronic vectors of cIL-2 and cIL-7 genes were constructed using the eukaryotic expression vector containing internal ribosome entry site (IRES). The cIL-2/ cIL-7 dicistronic vector plus previously constructed vectors, including CPV VP2 DNA vaccine vector, cIL-2 vector and cIL-7 vector, were used to co-immunize mice with different combinations, consisting of VP2 alone, VP2 + cIL-2, VP2 + cIL-7 and VP2 + cIL-2/cIL-7. The VP2-specific antibody levels in immunized mice were measured by ELISA at different time post-immunization. The proliferation indices and interferon-gamma expression were measured by lymphocyte proliferation assay and ELISA, respectively. RESULTS The cIL-2/cIL-7 bicistronic vector was correct and could mediate cIL-2 and cIL-7 gene expression in eukaryotic cells. Immunization results revealed that the antibody titers and the neutralizing antibody levels of the mice co-immunized with VP2 + cIL-7/cIL-2 vectors were significantly higher than that with either VP2 + cIL-2 vectors or VP2 + cIL-7 vectors (P < 0.05). The lymphocyte proliferation indices of VP2 + cIL-7/cIL-2 vector-immunized mice were also higher than that of other two groups although not statistically significant. However, the IFN-gamma expression levels of VP2 + cIL-7/cIL-2 vector-immunized mice were significantly higher than other immunized mice (P < 0.05). CONCLUSION The cIL-2 and cIL-7 genes showed the significant synergic effects on enhancing the immunogenecity of CPV VP2 DNA vaccine.
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Affiliation(s)
- Huihui Chen
- Department of Basic Veterinary Medicine, College of Animal Science and Technology, Agricultural University of Hebei, North China Research Center of Animal Epidemic Pathogen Biology, Ministry of Agriculture of China, Baoding 071001, China.
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Zhang K, Jin H, Zhong F, Li X, Neng C, Chen H, Li W, Wen J. [Adenovirus-mediated canine interferon-gamma expression and its antiviral activity against canine parvovirus]. Wei Sheng Wu Xue Bao 2012; 52:1400-1407. [PMID: 23383512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To construct recombinant adenovirus containing canine interferon-gamma (cIFN-gamma) gene and to investigate its antiviral activity against canine parvovirus in Madin-Darby canine kidney cells (MDCK). [Methods] The cIFN-gamma gene was inserted into adenovirus shuttle plasmid to construct pShuttle3-cIFN-gamma expression vector, from which the cIFN-gamma expression cassette was transferred into the adenovirus genomic plasmid pAdeno-X by specific restriction sites to generate recombinant adenovirus genomic plasmid pAd-cIFN-gamma. The pAd-cIFN-gamma plasmid was linearized by digestion and transfected into human embryonic kidney (HEK) 293T cells to generate the replication-defective cIFN-gamma recombinant adenovirus (Ad-cIFN-gamma). To analyze its anti-canine parvovirus activity, the MDCK cells were pre-infected by Ad-cIFN-gamma recombinant adenovirus, and then infected by canine parvovirus. The antiviral activity of the Ad-cIFN-gamma recombinant adenovirus against parvovirus was analyzed. RESULTS The recombinant adenovirus containing cIFN-gamma gene was constructed by the ligation method. The recombinant adenovirus could mediates recombinant cIFN-gamma secretory expression in MDCK cells. The Ad-cIFN-gamma recombinant adenovirus could significantly inhibit canine parvovirus replication in MDCK cells pre-infected with the recombinant adenovirus. These results indicate that the Ad-cIFN-gamma recombinant adenovirus has the potent antiviral activity against canine parvovirus. CONCLUSION The Ad-cIFN-gamma recombinant adenovirus was successfully constructed by the ligation method and possessed a powerful antiviral activity against canine parvovirus.
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Affiliation(s)
- Kao Zhang
- Department of Basic Veterinary Medicine, College of Veterinary Medicine, Agricultural University of Hebei, North China Research Center of Animal Epidemic Pathogen Biology, China Agriculture Ministry, Baoding 071001, China.
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Ma H, Zhao XY, Bian CZ. [Eukaryotic expression of NS1 major antigen region of PPV and development of an indirect ELISA based on the expressed protein]. Bing Du Xue Bao 2012; 28:628-632. [PMID: 23367561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
To construct secretory expression vector of PPV NS1 gene, the fragment of PPV NS1 gene coding for major antigen region of the NS1 protein was amplified by PCR and inserted into multiple clone site of eukaryotic expression vector pPICZalpha-A. The recombinant pPICZalpha-A-NS1 plasmid was transferred into P. pastoris strain GS115 mediated by electro transform. Recombinant P. pastoris strain GS115 was induced to express the fusion protein by methanol. The expressed and purified protein was analyzed by SDS-PAGE and Western Blot. The recombinant protein was highly-expressed and showed a good immunoreactivity. The indirect ELISA method was developed for detecting antibodies against PPV by checkerboard titration assay. The result showed that the optimal concentration of coated antigen was 3.2 microg/mL and the best dilution of serum was 1 : 80. The positive cut-off value of the ELISA assay was OD450 > 0.4 and OD450 positive serum/OD450 negative serum > 2.0. Compared with HI and commercial ELISA kits, the assay revealed 94.2% and 92.1% agreement respectively. The assay demonstrates good specificity and sensitivity, and can be applied in the detection of porcine parvovirus.
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Affiliation(s)
- Hui Ma
- Zhengzhou College of Animal Husbandry and Veterinary, Zhengzhou 450011, China
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Arockiaraj J, Avin FA, Vanaraja P, Easwvaran S, Singh A, Othman RY, Bhassu S. Immune role of MrNFκBI-α, an IκB family member characterized in prawn M. rosenbergii. Fish Shellfish Immunol 2012; 33:619-625. [PMID: 22750025 DOI: 10.1016/j.fsi.2012.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 06/06/2012] [Accepted: 06/15/2012] [Indexed: 06/01/2023]
Abstract
NF kappa B inhibitor alpha (MrNFκBI-α) was sequenced from a freshwater prawn Macrobrachium rosenbergii. The MrNFκBI-α protein contains a long ankyrin repeat region circular domain between 193 and 413 along with its 6 repeats (ankyrin repeat 1,2,3,4,5 and 6). An IκB degradation motif and a putative PEST motif is present at 37-64 and 418-471 of the N- and C-terminal regions of MrNFκBI-α respectively. The gene expressions of MrNFκBI-α in healthy and infectious hematopoietic and hypodermal necrosis virus (IHHNV), poly I:C, Aeromonas hydrophila and Enterococcus faecium injected M. rosenbergii were examined using quantitative real time PCR. The MrNFκBI-α is expressed in all the tissues taken for examination and the highest is observed in hemocytes. The MrNFκBI-α gene expression is strongly up-regulated in hemocytes of prawn after IHHNV, poly I:C, A. hydrophila and E. faecium infection. This result indicates an important role of MrNFκBI-α in M. rosenbergii immune system. This, however, remains to be verified by further studies.
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Affiliation(s)
- Jesu Arockiaraj
- Department of Biotechnology, Faculty of Science and Humanities, SRM University, SRM Nagar, Kattankulathur 603203, Chennai, Tamil Nadu, India.
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Gross O, Tschernatsch M, Bräu ME, Hempelmann G, Birklein F, Kaps M, Madlener K, Blaes F. Increased seroprevalence of parvovirus B 19 IgG in complex regional pain syndrome is not associated with antiendothelial autoimmunity. Eur J Pain 2012; 11:237-40. [PMID: 16545972 DOI: 10.1016/j.ejpain.2006.01.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2005] [Revised: 11/01/2005] [Accepted: 01/27/2006] [Indexed: 11/18/2022]
Abstract
The etiology of complex regional pain syndrome (CRPS) is unclear yet. Recently autoantibodies and antecedent viral infections have been discussed to be involved in the pathogenesis of CRPS. We investigated sera from 39 CRPS patients and healthy controls for parvovirus B19 IgG and the occurrence of antiendothelial autoantibodies (AECA). CRPS patients showed a higher seroprevalence of parvovirus B19 IgG than controls (p < 0.01). All CRPS 2 patients were positive. 10.2% of the CRPS patients and 10.0% of the controls had AECA (n.s.) and AECA were not associated with parvovirus B19 seropositivity. Our findings suggest the involvement of parvovirus B19, but not autoantibody-mediated endothelial cell damage, in the pathogenesis of CRPS.
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Affiliation(s)
- Oliver Gross
- Department of Neurology, Justus-Liebig-University, Am Steg 14, 35385 Giessen, Germany
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[Monitoring of implementation of international programs of poliomyelitis eradication and measles and rubella elimination in the Republic of Belarus]. Zh Mikrobiol Epidemiol Immunobiol 2012;:21-30. [PMID: 22442967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
AIM Monitoring of implementation of international programs of poliomyelitis eradication, and measles and rubella elimination in the Republic of Belarus based on results of molecular-epidemiologic studies of 2009 - 2010. MATERIALS AND METHODS 271 viral agents isolated from children with acute flaccid paralysis syndrome, other diseases, healthy children and from sewage water within the framework of poliomyelitis control implementation were identified by serological and molecular methods. Blood sera of 528 patients with fever and rash were examined for the presence of IgM to measles and rubella virus, 418 - for the presence of IgM to parvovirus B19 and parvovirus DNA. Blood sera of 33 pregnant women and 64 children with signs of intrauterine infection were studied for IgM and IgG antibodies to rubella virus. Measles virus was isolated, N-gene sequence and phylogenetic analysis carried out. RESULTS The studies performed confirmed that indigenous wild polioviruses in the country do not circulate, imported wild or vaccine-related polioviruses were also not detected. Measles and rubella morbidity in the Republic of Belarus was less than 1 in 1 000 000. 2 cases of rubella (2009) and 1 case of measles (2010) was detected during adequate control level: the rate of detection of patients with fever and rash, in whom measles and rubella diagnosis was excluded by the results of laboratory examination, was more than 2 in 100 000 of the population. The etiologic agent in more than 20% of diseases with fever and rash was parvovirus B19. A single case of measles was caused by genotype D8 virus imported from India. CONCLUSION The data obtained give evidence to conformance of the poliomyelitis, measles, rubella, innate rubella syndrome control implemented in the Republic of Belarus to WHO recommendations; maintenance of status of country as free from poliomyelitis and achievement of main criteria of elimination of both measles and rubella by 2010.
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Abstract
BACKGROUND Rat models of diabetes have emerged as a powerful experimental tool for addressing the role of microbial pathogens in the mechanism of autoimmune diabetes. We have used the biobreeding diabetes resistant and LEW1.WR1 rat models to identify the role of virus-induced innate immunity in the mechanism of type 1 diabetes. METHODS Groups of rats 21-25 days of age were left untreated, injected i.p. with 1×10(7) PFU of Kilham rat virus (KRV) only, or with 1-3 µg/g body-weight-purified toll-like receptor agonists on three consecutive days and infected with 1×10(7) PFU of KRV on the following day. Spleens and pancreatic lymph nodes were recovered 5 days after infection and used for gene array analysis. To test the role of inflammation in diabetes, rats injected with KRV only or Poly(I:C) plus KRV were also administered with 2 or 0.2 µg/g body weight of dexamethasone and followed for diabetes for 40 days. RESULTS KRV induced the expression of a vast array of proinflammatory genes in pancreatic lymph nodes on day 5 following infection. Brief dexamethasone therapy downmodulated inflammation and completely blocked diabetes. CONCLUSIONS Our data suggest a strong association between early virus-induced proinflammatory responses and islet destruction and raise the possibility that targeting innate immune pathways in the early stages of diabetes may be a useful strategy for disease prevention.
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Affiliation(s)
- Danny Zipris
- Barbara Davis Center for Childhood Diabetes, University of Colorado Denver, Aurora, CO 80045, USA.
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Larsen L. [Parvovirus B19 acute hepatitis in an immunocompetent adult]. Ugeskr Laeger 2011; 173:2719-2720. [PMID: 22027228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This article describes a case of acute hepatitis in an adult person without subsequent complications caused by parvovirus B19 (PVB19). The diagnosis was made by detection of PVB19 IgM and IgG antibody in the blood using ELISA. There was not made any affirmative polymerase chain reaction for DNA in the blood.
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MESH Headings
- Antibodies, Viral/blood
- Diagnosis, Differential
- Hepatitis, Viral, Human/complications
- Hepatitis, Viral, Human/immunology
- Hepatitis, Viral, Human/virology
- Humans
- Immunoglobulin G/blood
- Immunoglobulin M/blood
- Male
- Middle Aged
- Parvoviridae Infections/complications
- Parvoviridae Infections/immunology
- Parvoviridae Infections/virology
- Parvovirus B19, Human/immunology
- Parvovirus B19, Human/ultrastructure
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Affiliation(s)
- Lykke Larsen
- Infektionsmedicinsk Afdeling Q, Odense Universitetshospital, 5000 Odense, Denmark.
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48
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Streck AF, Gava D, Souza CK, Gonçalves KR, Bortolozzo FP, Wentz I, Canal CW. Presence of porcine parvovirus in sera from pigs is independent of antibody titers. Berl Munch Tierarztl Wochenschr 2011; 124:242-246. [PMID: 22059296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Porcine parvovirus (PPV) is a widespread DNA virus that causes reproductive failure in swine. The aim of the present study was to investigate the presence of PPV in sera of nursery piglets (healthy n = 191 and wasting n = 132) and regularly vaccinated sows (with different parity rank [PR] n = 129), collected from different herds. Altogether, 452 animals were sampled in 27 herds owned by five companies. All sera were analyzed for the presence of PPV DNA by nested-PCR. The samples from sows were in addition tested for the presence of antibodies by Hemagglutination Inhibition (HI). PPV DNA was detected in healthy piglets (15.7%), wasting piglets (18.2%) and sows (17.8%). 25 herds had at least one positive sample and four companies had positive animals. The serology revealed that 84.7% of the sows had detectable antibodies and the fourth PR sows had the highest mean PPV antibody titers. Thirteen sows (19.1%) were found to be positive for DNA detection in the presence of high levels of antibody titers (> 512). This finding indicates that PPV DNA can be detected in different swine production categories irrespective of antibody titers.
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Affiliation(s)
- André F Streck
- Institute for Animal Hygiene and Veterinary Public Health, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
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49
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Yang SJ, Hung CC, Chang SY, Lee KL, Chen MY. Immunoglobulin G and M antibodies to human parvovirus 4 (PARV4) are frequently detected in patients with HIV-1 infection. J Clin Virol 2011; 51:64-7. [PMID: 21353629 DOI: 10.1016/j.jcv.2011.01.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 01/16/2011] [Accepted: 01/20/2011] [Indexed: 11/18/2022]
Abstract
BACKGROUND The transmission routes of PARV4 are not completely understood. The first PARV4 serological study suggested that PARV4 is transmitted predominantly through parenteral route. OBJECTIVES To set up an immunoblot system for studying the epidemiology of PARV4 infection in HIV-1 infected patients in Taiwan. STUDY DESIGN Recombinant fusion proteins SUMOVP2 (a.a. 272-630 of PARV4 open reading frame 2) and SUMOVP3 (a.a. 604-914) were made and used as antigens in immunoblot. Plasma samples were from HIV-1 infected intravenous drug users IDU (69), homosexuals (66) and heterosexuals (68). RESULTS PARV4 IgG seropositive rate was 73.9%, 71.2% and 58.8%; IgM seropositive rate was 40.5%, 16.7% and 17.6% in IDUs, homosexuals and heterosexuals, respectively. Longitudinal samples were available from two homosexuals positive for IgM anti-PARV4, persistent IgM response was found over a period of 9 and 21 months, respectively. CONCLUSIONS PARV4 is a common viral infection in HIV-1 infected homosexuals and heterosexuals in Taiwan. The detection of IgM anti-PARV4 does not always suggest recent PARV4 infection.
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Affiliation(s)
- Shiu-Ju Yang
- Department of Internal Medicine, National Taiwan University Hospital, No. 7, Chung Shan South Road, 100 Taipei, Taiwan
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50
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Abstract
Natural killer (NK) cells play a vital role in the rejection of tumors. Pancreatic ductal adenocarcinoma (PDAC), however, remains a poor prognosis malignancy, due to its resistance to radio- and chemotherapy, and low immunogenicity. We demonstrate here that IL-2-activated human NK cells are able to kill PDAC cells. Currently, novel strategies are being pursued to combat PDAC. In this regard, oncolytic viruses, in addition to killing tumor cells, may also have the potential to augment antitumor immune responses. We found that, besides having an intrinsic oncolytic activity, parvovirus H-1PV is able to enhance NK cell-mediated killing of PDAC cells. Our results show that H-1PV infection of Panc-1 cells increases NK cell capacity to release IFN-γ, TNF-α and MIP-1α/β. Multiple activating receptors are involved in the NK cell-mediated killing of Panc-1 cells. Indeed, blocking of the natural cytotoxicity receptors-NKp30, 44 and 46 in combination, and NKG2D and DNAM1 alone inhibit the killing of Panc-1 cells. Interestingly, H-1PV infection of Panc-1 cells overcomes the part of inhibitory effects suggesting that parvovirus may induce additional NK cell ligands on Panc-1 cells. The enhanced sensitivity of H-1PV-infected PDAC cells to NK cell-dependent killing could be traced back to the upregulation of the DNAM-1 ligand, CD155 and to the downregulation of MHC class I expression. Our data suggests that NK cells display antitumor potential against PDAC and that H-1PV-based oncolytic immunotherapy could further boost NK cell-mediated immune responses and help to develop a combinatorial therapeutic approach against PDAC.
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Affiliation(s)
- Rauf Bhat
- Division of Tumor Virology, F010, German Cancer Research Center, Heidelberg, Germany.
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