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Colazo Salbetti MB, Boggio GA, Moreno L, Adamo MP. Human bocavirus respiratory infection: Tracing the path from viral replication and virus-cell interactions to diagnostic methods. Rev Med Virol 2023; 33:e2482. [PMID: 37749807 DOI: 10.1002/rmv.2482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/27/2023]
Abstract
Human bocaviruses were first described between 2005 and 2010, identified in respiratory and enteric tract samples of children. Screening studies have shown worldwide distribution. Based on phylogenetic analysis, they were classified into four genotypes (HBoV1-4). From a clinical perspective, human bocavirus 1 (HBoV1) is considered the most relevant, since it can cause upper and lower acute respiratory tract infection, mainly in infants, including common cold, bronchiolitis, and pneumonia, as well as wheezing in susceptible patients. However, the specific processes leading to structural, biochemical, and functional changes resulting in the different clinical presentations have not been elucidated yet. This review surveys the interactions between the virus and target cells that can potentially explain disease-causing mechanisms. It also summarises the clinical phenotype of cases, stressing the role of HBoV1 as an aetiological agent of lower acute respiratory infection in infants, together with laboratory tests for detection and diagnosis. By exploring the current knowledge on the epidemiology of HBoV1, insights into the complex scenario of paediatric respiratory infections are presented, as well as the potential effects that changes in the circulation can have on the dynamics of respiratory agents, spotlighting the benefits of comprehensively increase insights into incidence, interrelationships with co-circulating agents and potential control of HBoV1.
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Affiliation(s)
- María Belén Colazo Salbetti
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Cordoba, Argentina
| | - Gabriel Amilcar Boggio
- Cátedra de Clínica Pediátrica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Cordoba, Argentina
| | - Laura Moreno
- Cátedra de Clínica Pediátrica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Cordoba, Argentina
| | - María Pilar Adamo
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Cordoba, Argentina
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Johnson K, Taleo F, Willie K, Amel E, Nanu M, Alguet M, Wass J, Rymill P, Solomon A, Ruder K, Chen C, Zhong L, Hinterwirth A, Liu D, Abraham T, Seitzman G, Lietman T, Doan T. Viruses Associated with Acute Conjunctivitis in Vanuatu. Am J Trop Med Hyg 2023; 108:595-598. [PMID: 36646076 PMCID: PMC9978563 DOI: 10.4269/ajtmh.22-0600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 11/20/2022] [Indexed: 01/18/2023] Open
Abstract
The first manifestation of a viral infection may be conjunctivitis. There are limited data on the etiology of viral conjunctivitis in Vanuatu, a country in the South Pacific Ocean. Patients presenting to one of two Vanuatu health centers with presumed infectious conjunctivitis were eligible if symptom onset was within 14 days of screening. Conjunctival and anterior nasal swabs were obtained and subjected to unbiased RNA deep sequencing (RNA-seq) to identify DNA and RNA viruses. For samples collected from May to November 2021, RNA-seq identified a viral etiology in 12/48 patients. Human adenovirus species were the most common viruses (58%) detected, followed by human herpes viruses (cytomegalovirus, varicella zoster virus, and human herpes 7 virus). Rhinovirus C, Epstein-Barr virus, and bocavirus were also detected. In summary, the etiology for viral conjunctivitis in Vanuatu appears broad. Unbiased testing may be useful for disease surveillance.
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Affiliation(s)
| | - Fasihah Taleo
- Vanuatu Country Office, World Health Organization, Port Vila, Vanuatu
| | | | | | | | | | - Jose Wass
- Ministry of Health Eye Program, Vanuatu
| | | | - Anthony Solomon
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Kevin Ruder
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - Cindi Chen
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - Lina Zhong
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - Armin Hinterwirth
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - David Liu
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - Thomas Abraham
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
| | - Gerami Seitzman
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
- Department of Ophthalmology, University of California San Francisco, San Francisco, California
| | - Thomas Lietman
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
- Department of Ophthalmology, University of California San Francisco, San Francisco, California
| | - Thuy Doan
- Francis I. Proctor Foundation, University of California San Francisco, San Francisco, California
- Department of Ophthalmology, University of California San Francisco, San Francisco, California
- Address correspondence to Thuy Doan, Francis I. Proctor Foundation, University of California San Francisco, 490 Illinois St., Fl. 2, San Francisco, CA 94158. E-mail:
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Mijač M, Ljubin-Sternak S, Ivković-Jureković I, Vraneš J. Comparison of MT-PCR with Quantitative PCR for Human Bocavirus in Respiratory Samples with Multiple Respiratory Viruses Detection. Diagnostics (Basel) 2023; 13:diagnostics13050846. [PMID: 36899990 PMCID: PMC10001063 DOI: 10.3390/diagnostics13050846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/06/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
Human bocavirus (HBoV) is an important respiratory pathogen, especially in children, but it is often found in co-detection with other respiratory viruses, which makes the diagnostic approach challenging. We compared multiplex PCR and quantitative PCR for HBoV with multiplex tandem PCR (MT-PCR) in 55 cases of co-detection of HBoV and other respiratory viruses. In addition, we investigated whether there is a connection between the severity of the disease, measured by the localization of the infection, and amount of virus detected in the respiratory secretions. No statistically significant difference was found, but children with large amount of HBoV and other respiratory virus had a longer stay in hospital.
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Affiliation(s)
- Maja Mijač
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
- Correspondence:
| | - Sunčanica Ljubin-Sternak
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Irena Ivković-Jureković
- Department of Pulmonology, Allergy, Immunology and Rheumatology, Children’s Hospital Zagreb, 10000 Zagreb, Croatia
- Faculty for Dental Medicine and Healthcare, School of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Jasmina Vraneš
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
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Saha S, Fozzard N, Lambert SB, Ware RS, Grimwood K. Human bocavirus-1 infections in Australian children aged < 2 years: a birth cohort study. Eur J Clin Microbiol Infect Dis 2023; 42:99-108. [PMID: 36434280 PMCID: PMC9702687 DOI: 10.1007/s10096-022-04529-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/14/2022] [Indexed: 11/27/2022]
Abstract
To determine human bocavirus-1 (HBoV1) infection characteristics in young Australian children. Data were from the Observational Research in Childhood Infectious Diseases (ORChID) study, a Brisbane, Australia-based birth cohort of healthy, term, newborns followed prospectively for 2 years. Parents recorded daily symptoms, maintained an illness-burden diary, and collected weekly nasal swabs, which were tested for 17 respiratory viruses, including HBoV1, by real-time polymerase chain reaction (PCR) assays. Main outcomes measured were infection incidence, risk factors, symptoms, and healthcare use. One hundred fifty-eight children in the ORChID cohort provided 11,126 weekly swabs, of which 157 swabs were HBoV1 positive involving 107 incident episodes. Co-detections were observed in 65/157 (41.4%) HBoV1-positive swabs (or 41/107 [38.3%] infection episodes), principally with rhinovirus. Shedding duration was 1 week in 64.5% of episodes. The incidence of HBoV1 infections in the first 2 years of life was 0.58 episodes per child-year (95% confidence interval [CI] 0.47-0.71), including 0.38 episodes per child-year (95% CI 0.30-0.49) associated with respiratory symptoms. Recurrent episodes occurred in 18/87 (20.7%) children following their primary infection. In the first 2 years of life, incidence of HBoV1 episodes increased with age, during winter and with childcare attendance. Overall, 64.2% of HBoV1 episodes were symptomatic, with 26.4% having healthcare contact. Viral load estimates were higher when children were symptomatic than when asymptomatic (mean difference = 3.4; 95% CI 1.0-5.7 PCR cycle threshold units). After age 6 months, HBoV1 is detected frequently in the first 2 years of life, especially during winter. Symptoms are usually mild and associated with higher viral loads.
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Affiliation(s)
- Sumanta Saha
- School of Medicine and Dentistry, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia
| | - Nicolette Fozzard
- School of Pharmacy and Medical Sciences, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia
| | - Stephen B Lambert
- UQ Centre for Clinical Research, The University of Queensland, Brisbane, Queensland, Australia
- National Centre for Immunisation Research and Surveillance of Vaccine Preventable Diseases, Sydney, NSW, Australia
| | - Robert S Ware
- School of Medicine and Dentistry, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia
- Menzies Health Institute Queensland, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia
| | - Keith Grimwood
- School of Medicine and Dentistry, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia.
- Menzies Health Institute Queensland, Griffith University, Gold Coast campus, Gold Coast, Queensland, Australia.
- Departments of Infectious Diseases and Paediatrics, Gold Coast Health, Gold Coast, Queensland, Australia.
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Colazo Salbetti MB, Boggio GA, Abbiatti G, Montañez Sandoz A, Villarreal V, Torres E, Pedranti M, Zalazar JA, Moreno L, Adamo MP. Diagnosis and clinical significance of Human bocavirus 1 in children hospitalized for lower acute respiratory infection: molecular detection in respiratory secretions and serum. J Med Microbiol 2022; 71. [DOI: 10.1099/jmm.0.001595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Introduction. Human bocavirus 1 (HBoV1) infection occurs with viral genome presence in respiratory secretions (RS) and serum, and therefore both samples can be used for diagnosis.
Gap statement. The diagnostic sensitivity of HBoV1 DNA detection in serum and the duration of DNAaemia in severe clinical cases have not been elucidated.
Aim. To determine HBoV1 DNA in serum and RS of paediatric patients hospitalized for lower acute respiratory infection (LARI) and to analyse the clinical–epidemiological features of positive cases.
Methodology. This was a prospective, transverse study. Physicians selected the clinical situations and obtained paired clinical samples (RS and serum) that were tested by PCR/qPCR for HBoV1. Positive cases were analysed considering time of specimen collection, co-detection, clinical manifestations and viral load; statistical significant level was set at α=0.05.
Results. HBoV1 was detected in 98 of 402 cases included (24 %); 18/98 (18 %) patients had the virus detectable in serum and 91/98 (93 %) in RS (P<0.001). Positivity rates were not significantly different in patients with RS and serum collected within or beyond 24 h of admission. Single HBoV1 infection was identified in 39/98 patients (40 %), three patients had HBoV1 in both clinical samples (3/39, 8 %) and 32 (32/39, 82 %) only in RS, 22 of them (69 %) with both clinical samples within 24 h of admission. Cough (P=0.001) and rhinitis (P=0.003) were significantly frequent among them and most patients were diagnosed with bronchiolitis (22/39, 56 %) and pneumonia (9/39, 23 %), which was more frequent compared to cases with co-infection (P=0.04). No significant differences were identified among patients with high, medium or low viral load of HBoV1 regarding rate of positivity in both clinical samples, the time of collection of RS and serum, co-detection, first episode of LARI, clinical manifestations, comorbidity or requirement for assisted ventilation. Intensive care unit (ICU) patients had a significantly higher frequency of detection (P<0.001) and co-detection (P=0.001) compared to patients on standard care.
Conclusions. HBoV1 is prevalent among infant patients hospitalized for LARI and including it in the standard testing can add to the aetiological diagnosis in these cases, especially for patients admitted to the ICU. HBoV1 detection in serum did not contribute significantly to the diagnosis as compared to detection in respiratory secretions.
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Affiliation(s)
- Maria Belen Colazo Salbetti
- Instituto de Virología “Dr. J. M. Vanella”, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Gabriel Amilcar Boggio
- Clínica Privada Vélez Sársfield, Córdoba, Argentina
- Hospital de Niños de la Santísima Trinidad de Córdoba, Argentina
- Cátedra de Clínica Pediátrica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | | | | | | | - Erika Torres
- Hospital de Niños de la Santísima Trinidad de Córdoba, Argentina
| | - Mauro Pedranti
- Instituto de Virología “Dr. J. M. Vanella”, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | | | - Laura Moreno
- Cátedra de Clínica Pediátrica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Maria Pilar Adamo
- Instituto de Virología “Dr. J. M. Vanella”, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Sui H, Xu X, Su Y, Gong Z, Yao M, Liu X, Zhang T, Jiang Z, Bai T, Wang J, Zhang J, Xu C, Luo M. Gene therapy for cystic fibrosis: Challenges and prospects. Front Pharmacol 2022; 13:1015926. [PMID: 36304167 PMCID: PMC9592762 DOI: 10.3389/fphar.2022.1015926] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 09/29/2022] [Indexed: 11/25/2022] Open
Abstract
Cystic fibrosis (CF) is a life-threatening autosomal-recessive disease caused by mutations in a single gene encoding cystic fibrosis transmembrane conductance regulator (CFTR). CF effects multiple organs, and lung disease is the primary cause of mortality. The median age at death from CF is in the early forties. CF was one of the first diseases to be considered for gene therapy, and efforts focused on treating CF lung disease began shortly after the CFTR gene was identified in 1989. However, despite the quickly established proof-of-concept for CFTR gene transfer in vitro and in clinical trials in 1990s, to date, 36 CF gene therapy clinical trials involving ∼600 patients with CF have yet to achieve their desired outcomes. The long journey to pursue gene therapy as a cure for CF encountered more difficulties than originally anticipated, but immense progress has been made in the past decade in the developments of next generation airway transduction viral vectors and CF animal models that reproduced human CF disease phenotypes. In this review, we look back at the history for the lessons learned from previous clinical trials and summarize the recent advances in the research for CF gene therapy, including the emerging CRISPR-based gene editing strategies. We also discuss the airway transduction vectors, large animal CF models, the complexity of CF pathogenesis and heterogeneity of CFTR expression in airway epithelium, which are the major challenges to the implementation of a successful CF gene therapy, and highlight the future opportunities and prospects.
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Affiliation(s)
- Hongshu Sui
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
- *Correspondence: Hongshu Sui, ; Changlong Xu, ; Mingjiu Luo,
| | - Xinghua Xu
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Yanping Su
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Zhaoqing Gong
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Minhua Yao
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Xiaocui Liu
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Ting Zhang
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Ziyao Jiang
- Department of Histology and Embryology, School of Clinical and Basic Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Science, Jinan, Shandong, China
| | - Tianhao Bai
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
| | - Junzuo Wang
- The Affiliated Tai’an City Central Hospital of Qingdao University, Tai’an, Shandong, China
| | - Jingjun Zhang
- Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Tai’an, Shandong, China
| | - Changlong Xu
- The Reproductive Medical Center of Nanning Second People’s Hospital, Nanning, China
- National Center for International Research of Bio-targeting Theranostics, Guangxi Key Laboratory of Bio-targeting Theranostics, Collaborative Innovation Center for Targeting Tumor Diagnosis and Therapy, Guangxi Talent Highland of Bio-targeting Theranostics, Guangxi Medical University, Nanning, China
- *Correspondence: Hongshu Sui, ; Changlong Xu, ; Mingjiu Luo,
| | - Mingjiu Luo
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Tai’an, China
- *Correspondence: Hongshu Sui, ; Changlong Xu, ; Mingjiu Luo,
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Väisänen E, Kuisma I, Mäkinen M, Ilonen J, Veijola R, Toppari J, Hedman K, Söderlund-Venermo M. Torque Teno Virus Primary Infection Kinetics in Early Childhood. Viruses 2022; 14:v14061277. [PMID: 35746748 PMCID: PMC9231046 DOI: 10.3390/v14061277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/25/2022] [Accepted: 06/09/2022] [Indexed: 02/05/2023] Open
Abstract
Human torque teno viruses (TTVs) are a diverse group of small nonenveloped viruses with circular, single-stranded DNA genomes. These elusive anelloviruses are harbored in the blood stream of most humans and have thus been considered part of the normal flora. Whether the primary infection as a rule take(s) place before or after birth has been debated. The aim of our study was to determine the time of TTV primary infection and the viral load and strain variations during infancy and follow-up for up to 7 years. TTV DNAs were quantified in serial serum samples from 102 children by a pan-TTV quantitative PCR, and the amplicons from representative time points were cloned and sequenced to disclose the TTV strain diversity. We detected an unequivocal rise in TTV-DNA prevalence, from 39% at 4 months of age to 93% at 2 years; all children but one, 99%, became TTV-DNA positive before age 4 years. The TTV-DNA quantities ranged from 5 × 101 to 4 × 107 copies/mL, both within and between the children. In conclusion, TTV primary infections occur mainly after birth, and increase during the first two years with high intra- and interindividual variation in both DNA quantities and virus strains.
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Affiliation(s)
- Elina Väisänen
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (E.V.); (I.K.); (K.H.)
| | - Inka Kuisma
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (E.V.); (I.K.); (K.H.)
| | | | - Jorma Ilonen
- Immunogenetics Laboratory, Institute of Biomedicine, University of Turku, 20520 Turku, Finland;
| | - Riitta Veijola
- PEDEGO Research Unit, Medical Research Center, Department of Pediatrics, Oulu University Hospital and University of Oulu, 90220 Oulu, Finland;
| | - Jorma Toppari
- Centre for Population Health Research and Research Centre for Integrated Physiology and Pharmacology, Institute of Biomedicine, University of Turku, 20520 Turku, Finland;
- Department of Pediatrics, Turku University Hospital, 20520 Turku, Finland
| | - Klaus Hedman
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (E.V.); (I.K.); (K.H.)
- Helsinki University Hospital Laboratory (HUSLAB), 00290 Helsinki, Finland
| | - Maria Söderlund-Venermo
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (E.V.); (I.K.); (K.H.)
- Correspondence:
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First detection of feline bocaparvovirus 2 and feline chaphamaparvovirus in healthy cats in Turkey. Vet Res Commun 2021; 46:127-136. [PMID: 34553342 PMCID: PMC8457779 DOI: 10.1007/s11259-021-09836-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/17/2021] [Indexed: 02/06/2023]
Abstract
The pet cat’s population and the number of viruses that infect them are increasing worldwide. Recently, feline chaphamaparvovirus (FeChPV, also called fechavirus) and feline bocaparvovirus (FBoV) infections, which are novel parvovirus species, have been reported in cats from different geographic regions. Here, we investigated FBoV 1–3 and FeChPVs in healthy cats in Turkey using PCR, where nuclear phosphoprotein 1 (NP1) is targeted for FBoV and NP for FeChPV. For this purpose, oropharygeal swabs were obtained from 70 healthy cats with different housing status from June 15 to December 1, 2020. After PCR screening tests, six out of 70 cats (5/47 shelter cats; 1/23 domestic cats) were found to be positive for FBOV, while two were positive for FeChPV (1/47 shelter cats; 1/23 domestic cats). No cat was found in which both viruses were detected. The nucleotide (nt) sequence comparison in the 310 base pair (bp) NP gene of the two FeChPVs identified in this study shared a high identity with each other (95.0% nt and 99% aa identities) and with previously reported FeChPVs (92.4–97.1% nt and 98.1–99.0% aa identities), including 313R/2019/ITA, 49E/2019/ITA, VRI_849, 284R/2019/ITA, and IDEXX-1. Here, the near-full length (1489 nt, 495 amino acids-aa) of the VP2 gene of the FechaV/Tur-2020/68 isolate obtained from the study was also sequenced. The nt and aa identity ratio of this isolate with other FeChPVs was 98.0–98.5%-96–96.5%, respectively. Sequences of the 465 bp NP1 gene of the six Turkish FBoV strains shared high identities with each other (99.6–100% nt and 99.3–100% aa identities) and with those of FBoV-2 strains (97.8–99.1% nt and 98.0–100% aa identities), including 16SY0701, 17CC0505-BoV2, HFXA-6, and POR1. All FBoVs detected in this study were classified as genotype 2, similar to the study conducted in Japan and Portugal. Here, the NS1 (partial), NP1, VP1 and VP2 gene of the FBoV-2/TUR/2020–14 strain obtained from the study were also sequenced and the nt and aa sequences showed high identities to the above-mentioned FBoV-2 strain/isolates (> 96%, except for the aa ratio of strain 16SY0701). In conclusion, this study shows that FBoV and FeChPV are present in healthy cats in Turkey, and these viruses can be detected from oropharyngeal swabs. Our findings contribute to further investigation of the prevalence, genotype distribution, and genetic diversity of Turkish FBoVs and FeChPVs, adding to the molecular epidemiology of FBoV and FeChPVs worldwide.
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Ljubin-Sternak S, Slović A, Mijač M, Jurković M, Forčić D, Ivković-Jureković I, Tot T, Vraneš J. Prevalence and Molecular Characterization of Human Bocavirus Detected in Croatian Children with Respiratory Infection. Viruses 2021; 13:v13091728. [PMID: 34578309 PMCID: PMC8473146 DOI: 10.3390/v13091728] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 12/16/2022] Open
Abstract
Human bocavirus (HBoV) 1 is considered an important respiratory pathogen, while the role of HBoV2-4 in clinical disease remains somewhat controversial. Since, they are characterized by a rapid evolution, worldwide surveillance of HBoVs’ genetics is necessary. This study explored the prevalence of HBoV genotypes in pediatric patients with respiratory tract infection in Croatia and studied their phylogeny. Using multiplex PCR for 15 respiratory viruses, we investigated 957 respiratory samples of children up to 18 years of age with respiratory tract infection obtained from May 2017 to March 2021 at two different hospitals in Croatia. Amplification of HBoV near-complete genome or three overlapping fragments was performed, sequenced, and their phylogenetic inferences constructed. HBoV was detected in 7.6% children with a median age of 1.36 years. Co-infection was observed in 82.2% samples. Sequencing was successfully performed on 29 HBoV positive samples, and all belonged to HBoV1. Croatian HBoV1 sequences are closely related to strains isolated worldwide, and no phylogenetic grouping based on mono- or co-infection cases or year of isolation was observed. Calculated rates of evolution for HBoV1 were 10−4 and 10−5 substitutions per site and year. Recombination was not detected among sequences from this study.
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Affiliation(s)
- Sunčanica Ljubin-Sternak
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia; (M.M.); (J.V.)
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
- Correspondence:
| | - Anamarija Slović
- Center of Excellence for Virus Immunology and Vaccines, Center for Research and Knowledge Transfer in Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (A.S.); (M.J.); (D.F.)
| | - Maja Mijač
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia; (M.M.); (J.V.)
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
| | - Mirna Jurković
- Center of Excellence for Virus Immunology and Vaccines, Center for Research and Knowledge Transfer in Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (A.S.); (M.J.); (D.F.)
| | - Dubravko Forčić
- Center of Excellence for Virus Immunology and Vaccines, Center for Research and Knowledge Transfer in Biotechnology, University of Zagreb, 10000 Zagreb, Croatia; (A.S.); (M.J.); (D.F.)
| | - Irena Ivković-Jureković
- Department of Pulmonology, Allergy, Immunology and Rheumatology, Children’s Hospital Zagreb, 10000 Zagreb, Croatia;
- Faculty for Dental Medicine and Healthcare/School of Medicine, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia
| | - Tatjana Tot
- Microbiology Department, General hospital Karlovac, Karlovac, 47000 Karlovac, Croatia;
| | - Jasmina Vraneš
- Molecular Microbiology Department, Dr. Andrija Štampar Teaching Institute of Public Health, 10000 Zagreb, Croatia; (M.M.); (J.V.)
- Medical Microbiology Department, University of Zagreb School of Medicine, 10000 Zagreb, Croatia
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10
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Hairpin transfer-independent Parvovirus DNA Replication Produces Infectious Virus. J Virol 2021; 95:e0110821. [PMID: 34346761 DOI: 10.1128/jvi.01108-21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Parvoviruses package a linear single-stranded DNA genome with hairpin structures at both ends. It has been thought that terminal hairpin sequences are indispensable for viral DNA replication. Here, we provide evidence that the hairpin-deleted duplex genomes of human bocavirus 1 (HBoV1) replicate in human embryonic kidney (HEK) 293 cells. We propose an alternative model for HBoV1 DNA replication in which the leading strand can initiate strand-displacement without "hairpin-transfer." The transfection of the HBoV1 duplex genomes that retain a minimal replication origin at the right-end (OriR), but with extensive deletions in the right-end hairpin (REH), generated viruses in HEK293 cells at a level 10-20 times lower than the wild-type (WT) duplex genome. Importantly, these viruses that have a genome with various deletions after the OriR, but not the one retaining only the OriR, replicated in polarized human airway epithelia. We discovered that the 18-nt sequence (nt 5,403-5,420) beyond the OriR was sufficient to confer virus replication in polarized human airway epithelia, although its progeny virus production was ∼5 times lower than that of the WT virus. Thus, our study demonstrates that hairpin transfer-independent productive parvovirus DNA replication can occur. Importance Hairpin transfer-independent parvovirus replication was modeled with human bocavirus 1 (HBoV1) duplex genomes whose 5' hairpin structure was ablated by various deletions. In HEK293 cells, these duplex viral genomes with ablated 5'/hairpin sequence replicated efficiently and generated viruses that productively infected polarized human airway epithelium. Thus, for the first time, we reveal a previously unknown phenomenon that the productive parvovirus DNA replication does not depend on the hairpin sequence at REH to initiate "rolling hairpin" DNA replication. Notably, the intermediates of viral DNA replication, as revealed two-dimensional electrophoresis, from transfections of hairpin sequence-deleted duplex genome and full-length genome in HEK293 cells, as well as from virus infection of polarized human airway epithelia are similar. Thus, the establishment of the hairpin transfer-independent parvoviral DNA replication deepens our understanding in viral DNA replication and may have implications in development of parvovirus-based viral vectors with alternative properties.
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11
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Predominance of Human Bocavirus Genotypes 1 and 2 in Oysters in Thailand. Appl Environ Microbiol 2021; 87:e0045621. [PMID: 34047634 DOI: 10.1128/aem.00456-21] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Human bocavirus (HBoV) has been recognized as an important pathogen that causes respiratory infection and acute gastroenteritis in young children worldwide. HBoV is most likely transmitted by the respiratory route and by fecal-oral transmission. Recently, HBoV has been detected in several types of environmental water and in bivalve shellfish. However, study of the existence of HBoV in oysters is still undocumented in Thailand. In this study, 144 oyster samples collected from different markets in Chiang Mai, Thailand, in 2017 and 2018 were investigated for the presence of HBoV by nested PCR and sequencing. HBoV was detected in 11 out of 144 samples (7.6%). Nine HBoV-positive samples (81.8%) were identified as genotype 1 (HBoV1) and two (18.2%) as HBoV2. A monthly investigation of HBoV in oyster samples from July 2017 to June 2018 showed that HBoV was sporadically detected in particular months spanning the rainy and colder season, with a peak in January. This study demonstrates the presence and genotype diversity of HBoV in oyster samples in Thailand. The findings contribute to evaluating the risk of foodborne transmission of HBoV and to monitoring outbreaks of HBoV in Thailand and in other countries. IMPORTANCE Human bocavirus is recognized as an important cause of respiratory infection and of acute gastroenteritis in children worldwide. Human bocavirus has been widely detected in many clinical specimens, as well as in several types of environmental samples. Most previous studies describe the incidence of bocavirus infection in humans, whereas few data are available for the occurrence of human bocavirus in food materials, particularly that in bivalve shellfish. Our findings provide evidence for the existence and prevalence of human bocavirus in oysters, suggesting that further monitoring of the potential risk of food- and waterborne transmission of this virus to humans should be undertaken.
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12
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Clementi N, Ghosh S, De Santis M, Castelli M, Criscuolo E, Zanoni I, Clementi M, Mancini N. Viral Respiratory Pathogens and Lung Injury. Clin Microbiol Rev 2021; 34:e00103-20. [PMID: 33789928 PMCID: PMC8142519 DOI: 10.1128/cmr.00103-20] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Several viruses target the human respiratory tract, causing different clinical manifestations spanning from mild upper airway involvement to life-threatening acute respiratory distress syndrome (ARDS). As dramatically evident in the ongoing SARS-CoV-2 pandemic, the clinical picture is not always easily predictable due to the combined effect of direct viral and indirect patient-specific immune-mediated damage. In this review, we discuss the main RNA (orthomyxoviruses, paramyxoviruses, and coronaviruses) and DNA (adenoviruses, herpesviruses, and bocaviruses) viruses with respiratory tropism and their mechanisms of direct and indirect cell damage. We analyze the thin line existing between a protective immune response, capable of limiting viral replication, and an unbalanced, dysregulated immune activation often leading to the most severe complication. Our comprehension of the molecular mechanisms involved is increasing and this should pave the way for the development and clinical use of new tailored immune-based antiviral strategies.
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Affiliation(s)
- Nicola Clementi
- Laboratory of Microbiology and Virology, Vita-Salute San Raffaele University, Milan, Italy
- Laboratory of Microbiology and Virology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Sreya Ghosh
- Harvard Medical School, Boston Children's Hospital, Division of Immunology, Boston, Massachusetts, USA
| | - Maria De Santis
- Department of Rheumatology and Clinical Immunology, Humanitas Clinical and Research Center-IRCCS, Rozzano, Italy
| | - Matteo Castelli
- Laboratory of Microbiology and Virology, Vita-Salute San Raffaele University, Milan, Italy
| | - Elena Criscuolo
- Laboratory of Microbiology and Virology, Vita-Salute San Raffaele University, Milan, Italy
| | - Ivan Zanoni
- Harvard Medical School, Boston Children's Hospital, Division of Immunology, Boston, Massachusetts, USA
- Harvard Medical School, Boston Children's Hospital, Division of Gastroenterology, Boston, Massachusetts, USA
| | - Massimo Clementi
- Laboratory of Microbiology and Virology, Vita-Salute San Raffaele University, Milan, Italy
- Laboratory of Microbiology and Virology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Nicasio Mancini
- Laboratory of Microbiology and Virology, Vita-Salute San Raffaele University, Milan, Italy
- Laboratory of Microbiology and Virology, IRCCS San Raffaele Scientific Institute, Milan, Italy
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13
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Mohanraj U, Jokinen M, Thapa RR, Paloniemi M, Vesikari T, Lappalainen M, Tarkka E, Nora-Krūkle Z, Vilmane A, Vettenranta K, Mangani C, Oikarinen S, Fan YM, Ashorn P, Väisänen E, Söderlund-Venermo M. Human Protoparvovirus DNA and IgG in Children and Adults with and without Respiratory or Gastrointestinal Infections. Viruses 2021; 13:v13030483. [PMID: 33804173 PMCID: PMC7999311 DOI: 10.3390/v13030483] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/05/2021] [Accepted: 03/12/2021] [Indexed: 01/14/2023] Open
Abstract
Three human protoparvoviruses, bufavirus (BuV), tusavirus (TuV) and cutavirus (CuV), have recently been discovered in diarrheal stool. BuV has been associated with diarrhea and CuV with cutaneous T-cell lymphoma, but there are hardly any data for TuV or CuV in stool or respiratory samples. Hence, using qPCR and IgG enzyme immunoassays, we analyzed 1072 stool, 316 respiratory and 445 serum or plasma samples from 1098 patients with and without gastroenteritis (GE) or respiratory-tract infections (RTI) from Finland, Latvia and Malawi. The overall CuV-DNA prevalences in stool samples ranged between 0-6.1% among our six patient cohorts. In Finland, CuV DNA was significantly more prevalent in GE patients above rather than below 60 years of age (5.1% vs 0.2%). CuV DNA was more prevalent in stools among Latvian and Malawian children compared with Finnish children. In 10/11 CuV DNA-positive adults and 4/6 CuV DNA-positive children with GE, no known causal pathogens were detected. Interestingly, for the first time, CuV DNA was observed in two nasopharyngeal aspirates from children with RTI and the rare TuV in diarrheal stools of two adults. Our results provide new insights on the occurrence of human protoparvoviruses in GE and RTI in different countries.
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Affiliation(s)
- Ushanandini Mohanraj
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (M.J.); (R.R.T.); (E.V.); (M.S.-V.)
- Correspondence: ; Tel.: +358-469505437
| | - Maija Jokinen
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (M.J.); (R.R.T.); (E.V.); (M.S.-V.)
| | - Rajita Rayamajhi Thapa
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (M.J.); (R.R.T.); (E.V.); (M.S.-V.)
| | - Minna Paloniemi
- Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (M.P.); (S.O.); (Y.-M.F.); (P.A.)
| | | | - Maija Lappalainen
- Helsinki University Hospital Laboratory (HUSLAB), 00290 Helsinki, Finland; (M.L.); (E.T.)
| | - Eveliina Tarkka
- Helsinki University Hospital Laboratory (HUSLAB), 00290 Helsinki, Finland; (M.L.); (E.T.)
| | - Zaiga Nora-Krūkle
- Institute of Microbiology and Virology, Rīga Stradiņš University, 1067 Riga, Latvia; (Z.N.-K.); (A.V.)
| | - Anda Vilmane
- Institute of Microbiology and Virology, Rīga Stradiņš University, 1067 Riga, Latvia; (Z.N.-K.); (A.V.)
| | | | - Charles Mangani
- College of Medicine, University of Malawi, Blantyre 3, Malawi;
| | - Sami Oikarinen
- Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (M.P.); (S.O.); (Y.-M.F.); (P.A.)
| | - Yue-Mei Fan
- Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (M.P.); (S.O.); (Y.-M.F.); (P.A.)
| | - Per Ashorn
- Faculty of Medicine and Health Technology, Tampere University, 33100 Tampere, Finland; (M.P.); (S.O.); (Y.-M.F.); (P.A.)
| | - Elina Väisänen
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (M.J.); (R.R.T.); (E.V.); (M.S.-V.)
| | - Maria Söderlund-Venermo
- Department of Virology, University of Helsinki, 00290 Helsinki, Finland; (M.J.); (R.R.T.); (E.V.); (M.S.-V.)
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14
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Al Bishawi A, Ben Abid F, Ibrahim W. Bocavirus Infection in a Young Pregnant Woman: A Case Report and Literature Review. AMERICAN JOURNAL OF CASE REPORTS 2021; 22:e928099. [PMID: 33436535 PMCID: PMC7811980 DOI: 10.12659/ajcr.928099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Human bocavirus (HBoV) is a parvovirus found primarily in children and was first identified in 2005. It usually causes mild upper- and lower-respiratory tract infections. HBoV infection seems to be rare during adulthood, probably due to high antibody titers resulting from childhood infection and seroconversion. The clinical significance, possible complications, and consequences of an adulthood infection are still unclear. Furthermore, the consequences of HBoV infection during pregnancy are seldom reported in the literature. CASE REPORT We report the case of a 22-year-old pregnant woman in her third trimester who presented with a 1-week history of fever and cough followed by progressive shortness of breath. She was treated initially as a case of severe pneumonia; however, her condition deteriorated rapidly, resulting in hypoxic respiratory failure that required intensive care support. The patient was found to have dilated cardiomyopathy on echocardiography, and her fetal ultrasound showed no fetal heart activity; subsequently, labor induction for stillbirth was performed. An extensive workup for an underlying cause was unrevealing apart from positive respiratory viral PCR assay for human bocavirus, performed twice. A provisional diagnosis of HBoV pneumonia complicated by dilated cardiomyopathy, stillbirth, and multiorgan failure was made. Fortunately, the patient had a good recovery and was discharged home in good clinical condition. CONCLUSIONS In addition to severe pneumonia, HBoV infection may result in other life-threatening complications. Although the infection is rare during adulthood, infection in a pregnant woman should be taken seriously and close monitoring of such patients is advised.
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Affiliation(s)
- Ahmad Al Bishawi
- Department of Medicine, Division of Infectious Diseases, Hamad Medical Corporation, Doha, Qatar.,Department of Medicine, Division of General Medicine, Hamad Medical Corporation, Doha, Qatar
| | - Fatma Ben Abid
- Department of Medicine, Division of Infectious Diseases, Hamad Medical Corporation, Doha, Qatar.,Weill Cornell Medical College, Doha, Qatar
| | - Wanis Ibrahim
- Department of Medicine, Division of General Medicine, Hamad Medical Corporation, Doha, Qatar.,Weill Cornell Medical College, Doha, Qatar
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15
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Ogimi C, Martin ET, Xie H, Campbell AP, Waghmare A, Jerome KR, Leisenring WM, Milano F, Englund JA, Boeckh M. Role of Human Bocavirus Respiratory Tract Infection in Hematopoietic Cell Transplant Recipients. Clin Infect Dis 2020; 73:e4392-e4399. [PMID: 32772105 DOI: 10.1093/cid/ciaa1149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/31/2020] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Limited data exist regarding the impact of human bocavirus (BoV) in hematopoietic cell transplant (HCT) recipients. METHODS In a longitudinal surveillance study among allogeneic HCT recipients, pre-HCT and weekly post-HCT nasal washes and symptom surveys were collected through day 100, then at least every 3 months through 1 year post-HCT at the Fred Hutch (2005-2010). Samples were tested by multiplex semi-quantitative PCR for 12 viruses. Plasma samples from BoV+ subjects were analyzed by PCR. Separately, we conducted a retrospective review of HCT recipients with BoV detected in lower respiratory tract specimens. RESULTS Among 51 children and 420 adults in the prospective cohort, 21 distinct BoV respiratory tract infections (RTIs) were observed by 1 year post-HCT in 19 patients. Younger age and exposure to children were risk factors for BoV acquisition. Univariable models among patients with BoV RTI showed higher peak viral load in nasal samples (p=0.04) and presence of respiratory copathogens (p=0.03) were associated with presence of respiratory symptoms but BoV plasma detection was not. Only watery eyes and rhinorrhea were associated with BoV RTI in adjusted models. With additional chart review, we identified 6 HCT recipients with BoV detected in lower respiratory tract specimens [incidence rate of 0.4% (9/2509) per sample tested]. Although all cases presented with hypoxemia, 4 had respiratory copathogens or concomitant conditions that contributed to respiratory compromise. CONCLUSIONS BoV RTI is infrequent in transplant recipients and associated with mild symptoms. Our studies did not demonstrate convincing evidence that BoV is a serious respiratory pathogen.
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Affiliation(s)
- Chikara Ogimi
- Pediatric Infectious Diseases Division, Seattle Children's Hospital, Seattle, WA, USA.,Department of Pediatrics, University of Washington, Seattle, WA, USA.,Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Emily T Martin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Hu Xie
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Angela P Campbell
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Alpana Waghmare
- Pediatric Infectious Diseases Division, Seattle Children's Hospital, Seattle, WA, USA.,Department of Pediatrics, University of Washington, Seattle, WA, USA.,Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Keith R Jerome
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.,Departments of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - Wendy M Leisenring
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Filippo Milano
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.,Division of Medical Oncology, University of Washington, Seattle, WA, USA
| | - Janet A Englund
- Pediatric Infectious Diseases Division, Seattle Children's Hospital, Seattle, WA, USA.,Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Michael Boeckh
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.,Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.,Department of Medicine, University of Washington, Seattle, WA, USA
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16
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Bagasi AA, Howson-Wells HC, Clark G, Tarr AW, Soo S, Irving WL, McClure CP. Human Bocavirus infection and respiratory tract disease identified in a UK patient cohort. J Clin Virol 2020; 129:104453. [PMID: 32534437 PMCID: PMC7240277 DOI: 10.1016/j.jcv.2020.104453] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 12/20/2022]
Abstract
Human Bocavirus 1 (HBoV1) was commonly detected in a survey of circa 13,000 UK respiratory samples between 2015 and 2019. Co-infection with other viruses was observed in approximately three quarters of samples. However, mono-infection was also prevalent, and associated with clinically relevant disease. Intensive care was required in 31% of HBoV1 mono-infections and ventilation in 17%. Fatal multi-organ failure was observed in an apparently HBoV1 mono-infected and otherwise healthy child.
Background Since its first isolation in 2005, Human Bocavirus (HBoV) has been repeatedly associated with acute respiratory tract infections, although its role in pathogenicity remains unclear due to high co-infection rates. Objectives To assess HBoV prevalence and associated disease in a cohort of respiratory patients in the East Midlands, UK between 2015 and 2019. Study design We initially investigated the undiagnosed burden of HBoV in a retrospective paediatric cohort sampled between 2015 and 2017 using an in-house PCR assay. HBoV was subsequently incorporated into the standard respiratory diagnostic pathway and we audited a calendar year of HBoV positive results between 2018 and 2019. Results Our retrospective PCR screening of previously routine diagnostic-negative samples from juvenile patients identified a 9% (n = 30) prevalence of HBoV type 1. These apparent HBoV1 mono-infections were frequently associated with respiratory tract symptoms, often severe requiring ventilation, oxygen and steroid intervention with 31% (n = 9) of individuals requiring intensive care. When HBoV screening was subsequently adopted into the routine respiratory diagnostic pathway, year-round infections were observed in both children and adults peaking in February. 185 of 9098 (2.03%) individuals were found to be HBoV positive with children aged 12–24 months the principally infected group. However, HBoV infection was also observed in patients aged over 60, predominantly as a mono-infection. 23% of the 185 unique patients were HBoV monoinfected and persistent low-level DNA positivity was observed in 15 individuals up to 6-months after initial presentation. Conclusion HBoV1 is a prevalent respiratory infection in the UK capable of causing serious monoinfections.
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Affiliation(s)
- Arwa A Bagasi
- King Saud University, Riyadh, 11451, Saudi Arabia; NIHR Nottingham Digestive Diseases Biomedical Research Centre and School of Life Sciences, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Hannah C Howson-Wells
- Clinical Microbiology, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - Gemma Clark
- Clinical Microbiology, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - Alexander W Tarr
- NIHR Nottingham Digestive Diseases Biomedical Research Centre and School of Life Sciences, University of Nottingham, Nottingham, NG7 2UH, UK
| | - Shiu Soo
- Clinical Microbiology, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - William L Irving
- NIHR Nottingham Digestive Diseases Biomedical Research Centre and School of Life Sciences, University of Nottingham, Nottingham, NG7 2UH, UK; Clinical Microbiology, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - C Patrick McClure
- NIHR Nottingham Digestive Diseases Biomedical Research Centre and School of Life Sciences, University of Nottingham, Nottingham, NG7 2UH, UK.
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17
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Tang Y, Yan Z, Engelhardt JF. Viral Vectors, Animal Models, and Cellular Targets for Gene Therapy of Cystic Fibrosis Lung Disease. Hum Gene Ther 2020; 31:524-537. [PMID: 32138545 PMCID: PMC7232698 DOI: 10.1089/hum.2020.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/05/2020] [Indexed: 12/14/2022] Open
Abstract
After more than two decades since clinical trials tested the first use of recombinant adeno-associated virus (rAAV) to treat cystic fibrosis (CF) lung disease, gene therapy for this disorder has undergone a tremendous resurgence. Fueling this enthusiasm has been an enhanced understanding of rAAV transduction biology and cellular processes that limit transduction of airway epithelia, the development of new rAAV serotypes and other vector systems with high-level tropism for airway epithelial cells, an improved understanding of CF lung pathogenesis and the cellular targets for gene therapy, and the development of new animal models that reproduce the human CF disease phenotype. These advances have created a preclinical path for both assessing the efficacy of gene therapies in the CF lung and interrogating the target cell types in the lung required for complementation of the CF disease state. Lessons learned from early gene therapy attempts with rAAV in the CF lung have guided thinking for the testing of next-generation vector systems. Although unknown questions still remain regarding the cellular targets in the lung that are required or sufficient to complement CF lung disease, the field is now well positioned to tackle these challenges. This review will highlight the role that next-generation CF animal models are playing in the preclinical development of gene therapies for CF lung disease and the knowledge gaps in disease pathophysiology that these models are attempting to fill.
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Affiliation(s)
- Yinghua Tang
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Ziying Yan
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - John F. Engelhardt
- Department of Anatomy and Cell Biology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
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18
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Ishiguro T, Hirota S, Kobayashi Y, Takano K, Kobayashi Y, Shimizu Y, Takayanagi N. Fatal Primary Human Bocavirus Pneumonia in an Immunocompetent Adult. Intern Med 2020; 59:421-424. [PMID: 31588085 PMCID: PMC7028423 DOI: 10.2169/internalmedicine.3583-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A 70-year-old woman was admitted to our hospital for dyspnea and a fever of 2 weeks duration. Chest imaging showed bilateral infiltration, and a rapid diagnostic test for influenza virus, Mycoplasma pneumoniae, Streptococcus pneumoniae, and Legionella spp. was negative. She was intubated and mechanically ventilated and underwent bronchoalveolar lavage. Bronchoalveolar lavage fluid yielded no significant pathogens, and the multiplex polymerase chain reaction test was positive only for human bocavirus. Specific antibodies against significant pathogens were not increased in paired sera, so we diagnosed her with primary human bocavirus pneumonia.
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Affiliation(s)
- Takashi Ishiguro
- Departments of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Japan
| | - Shuko Hirota
- Departments of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Japan
| | - Yasuhito Kobayashi
- Departments of Pathology, Saitama Cardiovascular and Respiratory Center, Japan
| | - Kenji Takano
- Departments of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Japan
| | - Yoichi Kobayashi
- Departments of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Japan
| | - Yoshihiko Shimizu
- Departments of Pathology, Saitama Cardiovascular and Respiratory Center, Japan
| | - Noboru Takayanagi
- Departments of Respiratory Medicine, Saitama Cardiovascular and Respiratory Center, Japan
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19
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Costa BCL, Dábilla NAS, Almeida TN, Fiaccadori FS, de Souza TT, das Dores de Paula Cardoso D, de Moraes Arantes A, Souza M. Human bocavirus detection and quantification in fecal and serum specimens from recipients of allogeneic hematopoietic stem cell transplantation: A longitudinal study. J Med Virol 2019; 94:594-600. [PMID: 30982975 DOI: 10.1002/jmv.25486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate the occurrence of human bocavirus (HBoV) and to determine viral loads in samples of patients admitted for allogeneic hematopoietic stem cell transplantation (allo-HSCT). METHODS Fecal and serum samples were collected from 19 patients, during a 24-month period. Samples were screened by quantitative polymerase chain reaction TaqMan assay, with specific probe and primers targeting the NP1 gene of all HBoVs genotypes (HBoV-1 to - 4), and viral loads were determined using serial dilutions of a recombinant plasmid. RESULTS HBoV DNA was detected in 42.1% (8 of 19) of the patients in at least one type of sample (feces and/or serum) during the study period, with 75% (6 of 8) of the patients being positive in both types of sample. Viral shedding in feces had a median of 26 days (range, 5 to 121) and viremia was detected in 87.5% (7 of 8) of the patients. The HBoV loads in fecal samples were higher than in sera and, in most cases, HBoV was detected earlier in fecal than in sera samples. In six HBoV-positive patients (6 of 8) diarrhea was observed concomitantly to viral detection in fecal samples. CONCLUSIONS A high frequency and loads of HBoV in allo-HSCT recipients was observed, especially in fecal samples. Positivity in fecal samples was an early predictor of HBoV presence.
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Affiliation(s)
- Brunno Câmara Lopes Costa
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Nathânia Alves Silva Dábilla
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Tâmera Nunes Almeida
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Fabíola Souza Fiaccadori
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Teresinha Teixeira de Souza
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | - Divina das Dores de Paula Cardoso
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
| | | | - Menira Souza
- Laboratory of Virology and Cell Culture, Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
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Christensen A, Kesti O, Elenius V, Eskola AL, Døllner H, Altunbulakli C, Akdis CA, Söderlund-Venermo M, Jartti T. Human bocaviruses and paediatric infections. THE LANCET CHILD & ADOLESCENT HEALTH 2019; 3:418-426. [PMID: 30948251 DOI: 10.1016/s2352-4642(19)30057-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/14/2019] [Accepted: 02/15/2019] [Indexed: 12/16/2022]
Abstract
Human bocavirus 1 (HBoV1), belonging to the Parvoviridae family, was discovered in 2005, in nasopharyngeal samples from children with respiratory tract infections. Three additional bocaviruses, HBoV2-4, were discovered in 2009-10. These viruses have mainly been found in faecal samples and their role in human diseases is still uncertain. HBoV1 causes a wide spectrum of respiratory diseases in children, including common cold, acute otitis media, pneumonia, bronchiolitis, and asthma exacerbations. HBoV1 DNA can persist in airway secretions for months after an acute infection. Consequently, acute HBoV1 infection cannot be diagnosed with standard DNA PCR; quantitative PCR and serology are better diagnostic approaches. Because of their high clinical specificity, diagnostic developments such as HBoV1 mRNA and antigen detection have shown promising results. This Review summarises the knowledge on human bocaviruses, with a special focus on HBoV1.
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Affiliation(s)
- Andreas Christensen
- Department of Medical Microbiology, St Olavs Hospital, Trondheim, Norway; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway.
| | - Olli Kesti
- Department of Paediatrics, Turku University Hospital and University of Turku, Turku, Finland
| | - Varpu Elenius
- Department of Paediatrics, Turku University Hospital and University of Turku, Turku, Finland
| | - Anna L Eskola
- Department of Education, University of Turku, Turku, Finland
| | - Henrik Døllner
- Department of Pediatrics, St Olavs Hospital, Trondheim, Norway; Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway
| | - Can Altunbulakli
- Swiss Institute of Allergy and Asthma Research, University of Zürich and Christine Kühne-Center for Allergy Research and Education, Davos, Switzerland
| | - Cezmi A Akdis
- Swiss Institute of Allergy and Asthma Research, University of Zürich and Christine Kühne-Center for Allergy Research and Education, Davos, Switzerland
| | | | - Tuomas Jartti
- Department of Paediatrics, Turku University Hospital and University of Turku, Turku, Finland
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21
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Yan Z, Zou W, Feng Z, Shen W, Park SY, Deng X, Qiu J, Engelhardt JF. Establishment of a High-Yield Recombinant Adeno-Associated Virus/Human Bocavirus Vector Production System Independent of Bocavirus Nonstructural Proteins. Hum Gene Ther 2019; 30:556-570. [PMID: 30398383 DOI: 10.1089/hum.2018.173] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The genome of recombinant adeno-associated virus 2 (rAAV2) remains a promising candidate for gene therapy for cystic fibrosis (CF) lung disease, but due to limitations in the packaging capacity and the tropism of this virus with respect to the airways, strategies have evolved for packaging an rAAV2 genome (up to 5.8 kb) into the capsid of human bocavirus 1 (HBoV1) to produce a chimeric rAAV2/HBoV1 vector. Although a replication-incompetent HBoV1 genome has been established as a trans helper for capsid complementation, this system remains suboptimal with respect to virion yield. Here, a streamlined production system is described based on knowledge of the involvement of HBoV1 nonstructural (NS) proteins NS1, NS2, NS3, NS4, and NP1 in the process of virion production. The analyses reveal that NS1 and NS2 negatively impact virion production, NP1 is required to prevent premature termination of transcription of the cap mRNA from the native genome, and silent mutations within the polyadenylation sites of the cap coding sequence can eliminate this requirement for NP1. It is further shown that preventing the expression of all NS proteins significantly increases virion yield. Whereas the expression of capsid proteins VP1, VP2, and VP3 from a codon-optimized cap mRNA was highly efficient, optimal virion assembly, and thus potency, required enhanced VP1 expression, entailing a separate VP1 expression cassette. The final NS protein-free production system uses three-plasmid co-transfection of HEK293 cells, with one trans helper plasmid encoding VP1 and the AAV2 Rep proteins, and another encoding VP2-3 and components from adenovirus. This system yielded >16-fold more virions than the prototypic system, without reducing transduction potency. This increase in virion production is expected to facilitate greatly both research on the biology of rAAV2/HBoV1 and preclinical studies testing the effectiveness of this vector for gene therapy of CF lung disease in large animal models.
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Affiliation(s)
- Ziying Yan
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa.,2 Center for Gene Therapy, University of Iowa, Iowa City, Iowa
| | - Wei Zou
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas
| | - Zehua Feng
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
| | - Weiran Shen
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas
| | - Soo Yeun Park
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa
| | - Xuefeng Deng
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas
| | - Jianming Qiu
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, Kansas
| | - John F Engelhardt
- 1 Department of Anatomy and Cell Biology, University of Iowa, Iowa City, Iowa.,2 Center for Gene Therapy, University of Iowa, Iowa City, Iowa
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22
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The Human Bocavirus 1 NP1 Protein Is a Multifunctional Regulator of Viral RNA Processing. J Virol 2018; 92:JVI.01187-18. [PMID: 30135129 DOI: 10.1128/jvi.01187-18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/16/2018] [Indexed: 12/12/2022] Open
Abstract
Human bocavirus 1 (HBoV1) encodes a genus-specific protein, NP1, which regulates viral alternative pre-mRNA processing. Similar to NP1 of the related bocavirus minute virus of canine (MVC), HBoV1 NP1 suppressed cleavage and polyadenylation of RNAs at the viral internal polyadenylation site (pA)p. HBoV1 (pA)p is a complex region. It contains 5 significant cleavage and polyadenylation sites, and NP1 was found to regulate only the three of these sites that are governed by canonical AAUAAA hexamer signals. HBoV1 NP1 also facilitated splicing of the upstream intron adjacent to (pA)p. Alternative polyadenylation and splicing of the upstream intron were independent of each other, functioned efficiently within an isolated transcription unit, and were responsive independent of NP1. Characterization of HBoV1 NP1 generalizes its function within the genus Bocaparvovirus, uncovers important differences, and provides important comparisons with MVC NP1 for mechanistic and evolutionary considerations.IMPORTANCE The Parvovirinae are small nonenveloped icosahedral viruses that are important pathogens in many animal species, including humans. The NP1 protein of human bocavirus 1 (HBoV1), similar to NP1 of the bocavirus minute virus of canine (MVC), regulates viral alternative RNA processing by both suppressing polyadenylation at an internal site, (pA)p, and facilitating splicing of an upstream adjacent intron. These effects allow both extension into the capsid gene and splicing of the viral pre-mRNA that correctly registers the capsid gene open reading frame. Characterization of HBoV1 NP1 generalizes this central mode of parvovirus gene regulation to another member of the bocavirus genus and uncovers both important similarities and differences in function compared to MVC NP1 that will be important for future comparative studies.
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Tang YW, Stratton CW. The Role of the Human Bocavirus (HBoV) in Respiratory Infections. ADVANCED TECHNIQUES IN DIAGNOSTIC MICROBIOLOGY 2018. [PMCID: PMC7120174 DOI: 10.1007/978-3-319-95111-9_12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The human bocavirus is one of the most common respiratory viruses and occurs in all age groups. Because Koch’s postulates have been fulfilled unintendedly, it is currently accepted that the virus is a real pathogen associated with upper and lower respiratory tract infections causing clinical symptoms ranging from a mild common cold to life-threatening respiratory diseases. In order to exclude a viremia, serological analysis should be included during laboratory diagnostics, as acute and chronic infections cannot be differentiated by detection of viral nucleic acids in respiratory specimen alone due to prolonged viral shedding. Besides its ability to persist, the virus appears to trigger chronic lung disease and increases clinical symptoms by causing fibrotic lung diseases. Due to the lack of an animal model, clinical trials remain the major method for studying the long-term effects of HBoV infections.
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Affiliation(s)
- Yi-Wei Tang
- Departments of Laboratory Medicine and Internal Medicine, Memorial Sloan Kettering Cancer Center, New York, NY USA
| | - Charles W. Stratton
- Department of Pathology, Microbiology and Immunology and Medicine, Vanderbilt University Medical Center, Nashville, TN USA
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24
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Nascimento-Carvalho AC, Vilas-Boas AL, Fontoura MSH, Xu M, Vuorinen T, Söderlund-Venermo M, Ruuskanen O, Nascimento-Carvalho CM. Serologically diagnosed acute human bocavirus 1 infection in childhood community-acquired pneumonia. Pediatr Pulmonol 2018; 53:88-94. [PMID: 29028159 PMCID: PMC7167785 DOI: 10.1002/ppul.23891] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/14/2017] [Indexed: 01/07/2023]
Abstract
AIM To assess the role of human bocavirus 1 (HBoV1) as a causative agent of non-severe community-acquired pneumonia (CAP) in children. METHODS Patients aged 2-59 months with non-severe CAP (respiratory complaints and radiographic pulmonary infiltrate/consolidation) attending a University Hospital in Salvador, Brazil were enrolled in a prospective cohort. From 820 recruited children in a clinical trial (ClinicalTrials.gov NCT01200706), nasopharyngeal aspirate (NPA), and acute and convalescent serum samples were obtained from 759 (92.6%) patients. NPAs were tested for 16 respiratory viruses by PCR. Acute HBoV1 infection was confirmed by measuring specific IgM and IgG responses in paired serum samples. RESULTS Respiratory viruses were detected in 693 (91.3%; 95%CI: 89.1-93.2) CAP cases by PCR. HBoV1-DNA was detected in 159 (20.9%; 95%CI: 18.2-24.0) cases. Of these 159 PCR positive cases, acute HBoV1 infection was confirmed serologically in 38 cases (23.9%; 95%CI: 17.8-31.0). Overall, acute HBoV1 infection was confirmed in 5.0% (38/759) of non-severe CAP patients. HBoV1 was detected in 151 cases with at least one other virus making 31.7% of all multiple virus (n = 477) detections. Among all 759 cases, 216 had one respiratory virus detected, and sole HBoV1 was detected in only 8 (3.7%). Acute HBoV1 infection was serologically diagnosed in 34 (22.5%) HBoV1-DNA-positive cases with another virus, compared to 4 (50.0%) cases with sole virus detection (p = 0.09). CONCLUSION HBoV1 was detected by PCR in one fifth of the children with non-severe CAP and acute HBoV1 infection was serologically confirmed in one quarter of these cases.
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Affiliation(s)
| | - Ana-Luisa Vilas-Boas
- Department of Pediatrics, Federal University of Bahia School of Medicine, Salvador, Brazil
| | | | - Man Xu
- Department of Virology, University of Helsinki, Helsinki, Finland
| | - Tytti Vuorinen
- Department of Clinical Virology Turku University Hospital and Department of Virology, University of Turku, Turku, Finland
| | | | - Olli Ruuskanen
- Department of Pediatrics, University of Turku, Turku, Finland
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- Department of Pediatrics, Federal University of Bahia School of Medicine, Salvador, Brazil
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25
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Andrade DC, Borges IC, Ekström N, Jartti T, Puhakka T, Barral A, Kayhty H, Ruuskanen O, Nascimento-Carvalho CM. Determination of avidity of IgG against protein antigens from Streptococcus pneumoniae: assay development and preliminary application in clinical settings. Eur J Clin Microbiol Infect Dis 2017; 37:77-89. [PMID: 29027028 DOI: 10.1007/s10096-017-3103-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/04/2017] [Indexed: 11/27/2022]
Abstract
The measurement of antibody levels is a common test for the diagnosis of Streptococcus pneumoniae infection in research. However, the quality of antibody response, reflected by avidity, has not been adequately evaluated. We aimed to evaluate the role of avidity of IgG against eight pneumococcal proteins in etiologic diagnosis. Eight pneumococcal proteins (Ply, CbpA, PspA1 and 2, PcpA, PhtD, StkP-C, and PcsB-N) were used to develop a multiplex bead-based avidity immunoassay. The assay was tested for effects of the chaotropic agent, multiplexing, and repeatability. The developed assay was applied to paired samples from children with or without pneumococcal disease (n = 38 for each group), determined by either serology, polymerase chain reaction (PCR), or blood culture. We found a good correlation between singleplex and multiplex assays, with r ≥ 0.94.The assay was reproducible, with mean inter-assay variation ≤ 9% and intra-assay variation < 6%. Children with pneumococcal disease had lower median avidity indexes in the acute phase of disease for PspA1 and 2 (p = 0.042), PcpA (p = 0.002), PhtD (p = 0.014), and StkP-C (p < 0.001). When the use of IgG avidity as a diagnostic tool for pneumococcal infection was evaluated, the highest discriminative power was found for StkP-C, followed by PcpA (area under the curve [95% confidence interval, CI]: 0.868 [0.759-0.977] and 0.743 [0.607-879], respectively). The developed assay was robust and had no deleterious influence from multiplexing. Children with pneumococcal disease had lower median avidity against five pneumococcal proteins in the acute phase of disease compared to children without disease.
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Affiliation(s)
- D C Andrade
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil.
| | - I C Borges
- Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
| | - N Ekström
- National Institute for Health and Welfare, Helsinki, Finland
| | - T Jartti
- Department of Paediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - T Puhakka
- Department of Otorhinolaryngology, University of Turku and Turku University Hospital, Turku, Finland
- Department of Otorhinolaryngology, Satakunta Central Hospital, Pori, Finland
| | - A Barral
- Pathology Department and Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine and Centro de Pesquisa Gonçalo Muniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil
| | - H Kayhty
- National Institute for Health and Welfare, Helsinki, Finland
| | - O Ruuskanen
- Department of Paediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - C M Nascimento-Carvalho
- Department of Pediatrics and Postgraduate Programme in Health Sciences, Federal University of Bahia School of Medicine, Salvador, Bahia, Brazil
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26
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Schlaberg R, Ampofo K, Tardif KD, Stockmann C, Simmon KE, Hymas W, Flygare S, Kennedy B, Blaschke A, Eilbeck K, Yandell M, McCullers JA, Williams DJ, Edwards K, Arnold SR, Bramley A, Jain S, Pavia AT. Human Bocavirus Capsid Messenger RNA Detection in Children With Pneumonia. J Infect Dis 2017; 216:688-696. [PMID: 28934425 PMCID: PMC5853397 DOI: 10.1093/infdis/jix352] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/19/2017] [Indexed: 12/14/2022] Open
Abstract
Background The role of human bocavirus (HBoV) in respiratory illness is uncertain. HBoV genomic DNA is frequently detected in both ill and healthy children. We hypothesized that spliced viral capsid messenger RNA (mRNA) produced during active replication might be a better marker for acute infection. Methods As part of the Etiology of Pneumonia in the Community (EPIC) study, children aged <18 years who were hospitalized with community-acquired pneumonia (CAP) and children asymptomatic at the time of elective outpatient surgery (controls) were enrolled. Nasopharyngeal/oropharyngeal specimens were tested for HBoV mRNA and genomic DNA by quantitative polymerase chain reaction. Results HBoV DNA was detected in 10.4% of 1295 patients with CAP and 7.5% of 721 controls (odds ratio [OR], 1.4 [95% confidence interval {CI}, 1.0–2.0]); HBoV mRNA was detected in 2.1% and 0.4%, respectively (OR, 5.1 [95% CI, 1.6–26]). When adjusted for age, enrollment month, and detection of other respiratory viruses, HBoV mRNA detection (adjusted OR, 7.6 [95% CI, 1.5–38.4]) but not DNA (adjusted OR, 1.2 [95% CI, .6–2.4]) was associated with CAP. Among children with no other pathogens detected, HBoV mRNA (OR, 9.6 [95% CI, 1.9–82]) was strongly associated with CAP. Conclusions Detection of HBoV mRNA but not DNA was associated with CAP, supporting a pathogenic role for HBoV in CAP. HBoV mRNA could be a useful target for diagnostic testing.
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Affiliation(s)
- Robert Schlaberg
- Department of Pathology.,ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, Utah
| | | | - Keith D Tardif
- ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, Utah
| | | | | | - Weston Hymas
- ARUP Institute for Clinical and Experimental Pathology, Salt Lake City, Utah
| | | | | | | | | | - Mark Yandell
- Department of Human Genetics, University of Utah
| | - Jon A McCullers
- Department of Pediatrics, University of Tennessee Health Sciences Center.,Nashville and Le Bonheur Children's Hospital.,St. Jude Children's Research Hospital, Memphis
| | - Derek J Williams
- Vanderbilt University School of Medicine.,Division of Infectious Diseases, Department of Pediatrics, Monroe Carell Jr. Children's Hospital, Vanderbilt University.,Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Kathryn Edwards
- Division of Infectious Diseases, Department of Pediatrics, Monroe Carell Jr. Children's Hospital, Vanderbilt University.,Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Sandra R Arnold
- Department of Pediatrics, University of Tennessee Health Sciences Center.,Nashville and Le Bonheur Children's Hospital
| | - Anna Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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27
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Kang HJ, Kim SH, Chung JK, Lee SW, Choi SB, Eom HE, Park O, Kim K, Kim SS. Viral etiology of sporadic cases of parotitis among children in Korea during 2013-2014. J Med Virol 2017; 90:61-66. [PMID: 28876460 DOI: 10.1002/jmv.24935] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 08/01/2017] [Indexed: 12/28/2022]
Abstract
Recent years have seen a high incidence of mumps, which is generally diagnosed based on clinical features, especially parotitis, without laboratory confirmation in Korea. To better understand the epidemiology of mumps in Korean children, we investigated sporadic suspected mumps cases with parotitis. In total, 237 buccal swabs or throat swabs collected from children with parotitis who had been clinically diagnosed with mumps were tested using real-time PCR for the detection of six viruses (Epstein-Barr virus, Human herpesvirus 6, Mumps virus, Human parainfluenza virus-1, -2, -3, Human adenovirus, Human bocavirus). Among 237 parotitis cases, 87 (36.7%) were positive for at least one virus; a single infection was observed in 73 (83.9%) cases, and co-infections were detected in 14 (16.1%) cases. Epstein-Barr virus was most frequent (20.7%), followed by human herpesvirus 6 (8.0%), mumps virus (5.5%), human parainfluenza virus-3 (4.6%), human adenovirus (4.2%), and human bocavirus (0.4%). These data suggested that the sporadic suspected mumps in the children might be related to other respiratory viruses rather than to the mumps virus. Our findings also indicate the limitation of clinical diagnosis without laboratory confirmation for mumps and thus highlight the importance of laboratory testing in suspected mumps cases.
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Affiliation(s)
- Hae J Kang
- Division of Respiratory Viruses, Center for Infectious Diseases, National Institutes of Health, Korea Centers for Disease Control & Prevention, Cheongju-si, Chungbuk, Korea
| | - Sun H Kim
- Health and Environment Institute of Gwangju, Gwangju, Korea
| | - Jae K Chung
- Health and Environment Institute of Gwangju, Gwangju, Korea
| | - Soon W Lee
- Gangwon Institute of Health and Environment, Gangwon, Korea
| | - Seung B Choi
- Gangwon Institute of Health and Environment, Gangwon, Korea
| | - Hye E Eom
- Divison of Vaccine-Preventable Diseases Control and National Immunization Program, Centers for Disease Prevention, Korea Centers for Disease Control & Prevention, Cheongju-si, Chungbuk, Korea
| | - Ok Park
- Divison of Risk Assessment & International Cooperation, Centers for Emergency Operations, Korea Centers for Disease Control & Prevention, Cheongju-si, Chungbuk, Korea
| | - Kisoon Kim
- Division of Influenza Viruses, Center for Infectious Diseases, National Institutes of Health, Korea Centers for Disease Control & Prevention, Cheongju-si, Chungbuk, Korea
| | - Sung S Kim
- Division of Respiratory Viruses, Center for Infectious Diseases, National Institutes of Health, Korea Centers for Disease Control & Prevention, Cheongju-si, Chungbuk, Korea
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28
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Zhang J, Bai Y, Zhu B, Hao S, Chen Z, Wang H, Guan W. Mutations in the C-terminus of HBoV NS1 affect the function of NP1. Sci Rep 2017; 7:7407. [PMID: 28785044 PMCID: PMC5547040 DOI: 10.1038/s41598-017-06513-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 06/13/2017] [Indexed: 02/07/2023] Open
Abstract
Human bocavirus 1 (HBoV1) is an autonomous parvovirus in the Bocaparvovirus genus. The multifunctional nuclear protein NP1 is involved in viral replication. In the present study, we found that the mutations in the C-terminus of NS1 affected NP1 function in viral replication. Knocking out NP1 expression in the recombinant infectious clone, on which the C-terminus of NS1 was mutated based on the clinical samples from nasopharyngeal aspirates, resulted in different degrees of decreased replication. The result suggested that NP1 facilitated the replication of viral genome but was not necessary, which is different from the minute virus of canines, where NP1 is essential for viral replication. Further studies showed that clinical mutations in the NP1 region did not affect viral genome replication, and UP1 promoted viral DNA replication. Our results suggested that the C-terminus of NS1 is important for viral replication and may be a target for regulating the replication of the viral genome.
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Affiliation(s)
- Junmei Zhang
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yan Bai
- Pediatric department of Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Bing Zhu
- Center Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou, 510120, P. R. China
| | - Sujuan Hao
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhen Chen
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China
| | - Hanzhong Wang
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China
| | - Wuxiang Guan
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei, 430071, China.
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29
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Ghietto LM, Toigo D'Angelo AP, Viale FA, Adamo MP. Human bocavirus 1 infection of CACO-2 cell line cultures. Virology 2017; 510:273-280. [PMID: 28777951 PMCID: PMC7172243 DOI: 10.1016/j.virol.2017.07.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 02/07/2023]
Abstract
Human bocavirus 1 (HBoV1) is a parvovirus associated with pneumonia in infants. It has been detected in different tissues, including colorectal tumors. In this study, we investigated whether Caco-2 cell line, derived from human colon cancer, can be utilized as a model for HBoV1 replication. We demonstrate HBoV1 replication in Caco-2 cultures supplemented with DEAE-dextran after inoculation with respiratory material from infected patients presenting with acute respiratory infection. A viral cycle of rapid development is displayed. However, in spite of HBoV1 DNA 4-fold increment in the supernatants and monolayers by day 1, evidencing that the system allows the virus genome replication after the entry occurred, infectious progeny particles were not produced. These results are consistent with an infection that is limited to a single growth cycle, which can be associated to mutations in the NS1 and VP1/VP2 regions of HBoV1 genome. Further research will contribute to fully elucidate these observations. HBoV1 replicates within 24 h in standard and differentiated Caco-2 cells. DNA is detected in attached cell and supernatant medium. Immunofluorescence tests evidences HBoV1 infection. DNA replication occurred but infectious progeny particles were not produced. The viral genome presents deleterious mutations at NS1 and VP1/VP2 regions.
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Affiliation(s)
- Lucía María Ghietto
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Ana Paola Toigo D'Angelo
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - Franco Agustin Viale
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina
| | - María Pilar Adamo
- Instituto de Virología "Dr. J. M. Vanella", Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina.
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30
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Yan Z, Feng Z, Sun X, Zhang Y, Zou W, Wang Z, Jensen-Cody C, Liang B, Park SY, Qiu J, Engelhardt JF. Human Bocavirus Type-1 Capsid Facilitates the Transduction of Ferret Airways by Adeno-Associated Virus Genomes. Hum Gene Ther 2017; 28:612-625. [PMID: 28490200 DOI: 10.1089/hum.2017.060] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Human bocavirus type-1 (HBoV1) has a high tropism for the apical membrane of human airway epithelia. The packaging of a recombinant adeno-associated virus 2 (rAAV2) genome into HBoV1 capsid produces a chimeric vector (rAAV2/HBoV1) that also efficiently transduces human airway epithelia. As such, this vector is attractive for use in gene therapies to treat lung diseases such as cystic fibrosis. However, preclinical development of rAAV2/HBoV1 vectors has been hindered by the fact that humans are the only known host for HBoV1 infection. This study reports that rAAV2/HBoV1 vector is capable of efficiently transducing the lungs of both newborn (3- to 7-day-old) and juvenile (29-day-old) ferrets, predominantly in the distal airways. Analyses of in vivo, ex vivo, and in vitro models of the ferret proximal airway demonstrate that infection of this particular region is less effective than it is in humans. Studies of vector binding and endocytosis in polarized ferret proximal airway epithelial cultures revealed that a lack of effective vector endocytosis is the main cause of inefficient transduction in vitro. While transgene expression declined proportionally with growth of the ferrets following infection at 7 days of age, reinfection of ferrets with rAAV2/HBoV1 at 29 days gave rise to approximately 5-fold higher levels of transduction than observed in naive infected 29-day-old animals. The findings presented here lay the foundation for clinical development of HBoV1 capsid-based vectors for lung gene therapy in cystic fibrosis using ferret models.
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Affiliation(s)
- Ziying Yan
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa.,2 Center for Gene Therapy, University of Iowa , Iowa City, Iowa
| | - Zehua Feng
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa
| | - Xingshen Sun
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa
| | - Yulong Zhang
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa
| | - Wei Zou
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center , Kansas City, Kansas
| | - Zekun Wang
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center , Kansas City, Kansas
| | | | - Bo Liang
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa
| | - Soo-Yeun Park
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa
| | - Jianming Qiu
- 3 Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center , Kansas City, Kansas
| | - John F Engelhardt
- 1 Department of Anatomy and Cell Biology, University of Iowa , Iowa City, Iowa.,2 Center for Gene Therapy, University of Iowa , Iowa City, Iowa
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Storch G. Powerful Diagnostic Methods Applied to a Unique Specimen Collection. J Infect Dis 2017; 215:1349-1351. [DOI: 10.1093/infdis/jix151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 03/20/2017] [Indexed: 11/13/2022] Open
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Barenkamp SJ, Chonmaitree T, Hakansson AP, Heikkinen T, King S, Nokso-Koivisto J, Novotny LA, Patel JA, Pettigrew M, Swords WE. Panel 4: Report of the Microbiology Panel. Otolaryngol Head Neck Surg 2017; 156:S51-S62. [PMID: 28372529 PMCID: PMC5490388 DOI: 10.1177/0194599816639028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 02/24/2016] [Indexed: 12/12/2022]
Abstract
Objective To perform a comprehensive review of the literature from July 2011 until June 2015 on the virology and bacteriology of otitis media in children. Data Sources PubMed database of the National Library of Medicine. Review Methods Two subpanels comprising experts in the virology and bacteriology of otitis media were created. Each panel reviewed the relevant literature in the fields of virology and bacteriology and generated draft reviews. These initial reviews were distributed to all panel members prior to meeting together at the Post-symposium Research Conference of the 18th International Symposium on Recent Advances in Otitis Media, National Harbor, Maryland, in June 2015. A final draft was created, circulated, and approved by all panel members. Conclusions Excellent progress has been made in the past 4 years in advancing our understanding of the microbiology of otitis media. Numerous advances were made in basic laboratory studies, in animal models of otitis media, in better understanding the epidemiology of disease, and in clinical practice. Implications for Practice (1) Many viruses cause acute otitis media without bacterial coinfection, and such cases do not require antibiotic treatment. (2) When respiratory syncytial virus, metapneumovirus, and influenza virus peak in the community, practitioners can expect to see an increase in clinical otitis media cases. (3) Biomarkers that predict which children with upper respiratory tract infections will develop otitis media may be available in the future. (4) Compounds that target newly identified bacterial virulence determinants may be available as future treatment options for children with otitis media.
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Affiliation(s)
- Stephen J. Barenkamp
- Department of Pediatrics, St Louis University School of Medicine, St Louis, Missouri, USA
| | - Tasnee Chonmaitree
- Department of Pediatrics, University of Texas Medical Branch, Galveston, Texas, USA
| | | | - Terho Heikkinen
- Department of Pediatrics, University of Turku and Turku University Hospital, Turku, Finland
| | - Samantha King
- The Research Institute at Nationwide Children’s Hospital and Ohio State University, Columbus, Ohio, USA
| | - Johanna Nokso-Koivisto
- Department of Otorhinolaryngology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Laura A. Novotny
- The Research Institute at Nationwide Children’s Hospital and Ohio State University, Columbus, Ohio, USA
| | - Janak A. Patel
- Department of Pediatrics, University of Texas Medical Branch, Galveston, Texas, USA
| | - Melinda Pettigrew
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - W. Edward Swords
- Department of Microbiology and Immunology, Wake Forest University, Winston-Salem, North Carolina, USA
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Abdel-Moneim AS, Kamel MM, Hassan NM. Evolutionary and genetic analysis of human bocavirus genotype-1 strains reveals an evidence of intragenomic recombination. J Med Microbiol 2017; 66:245-254. [PMID: 28086073 DOI: 10.1099/jmm.0.000432] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
PURPOSE Human bocavirus (HBoV) exsits in four genotypes: 1 to 4, with HBoV-1 being the most prevalent genotype. The aim of the current study was to genetically analyze the full-length genome of the HBoV-1 of recently detected Egyptian strains. METHODOLOGY Seven overlapping sets of primers were developed to amplify an almost complete HBoV-1 genome from the clinical samples. The primer sets were tested on three recently identified Egyptian HBoV-1 strains with viral loads ≥105 ml-1. Sequencing was conducted using the same sets of primers. HBoV-1 virus strains were genetically analyzed based on the sequences of their complete genomes and the individual ORFs. RESULTS The new sets of primers successfully amplified the three tested strains. Sequence analysis of the full-length genome of the HBoV-1 revealed a considerable level of genetic heterogenicity between different strains. Based on the full genome and VP1 ORF, HBoV-1 viruses were clustered into three main lineages, A to C, and lineage A was further subdivided into three sublineages, A1-A3. The Egyptian strains were clustered within two sublineages, A1 and A2. New amino acid substitutions were detected in NS1 and VP1/VP2 proteins. Both inter- and intragenomic recombination events were detected among the Egyptian strains. CONCLUSION The existence of both intragenomic recombination event and multiple amino acid substitutions in the examined Egyptian HBoV-1 strains elucidates considerable level of genetic alterations among bocaviruses. Their possible effects on the virus virulence and multiplication efficiency need to be investigated.
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Affiliation(s)
- Ahmed S Abdel-Moneim
- Virology Department, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef 62511, Egypt.,Microbiology Department, College of Medicine, Taif University, Al-Taif 21944, Saudi Arabia
| | - Mahmoud M Kamel
- Clinical Pathology Department, National Cancer Institute, Cairo University, Giza, Egypt
| | - Naglaa M Hassan
- Clinical Pathology Department, National Cancer Institute, Cairo University, Giza, Egypt
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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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Natural Development of Antibodies against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis Protein Antigens during the First 13 Years of Life. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2016; 23:878-883. [PMID: 27581439 DOI: 10.1128/cvi.00341-16] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 08/26/2016] [Indexed: 12/27/2022]
Abstract
Conserved protein antigens have been investigated as vaccine candidates against respiratory pathogens. We evaluated the natural development of antibodies against Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis proteins during childhood. Serum samples were collected from 50 healthy children from their first months to age 13 years (median sampling interval, 6 months). We also analyzed serum samples from 24 adults. Serum IgG antibodies against eight pneumococcal proteins (Ply, CbpA, PspA 1 and 2, PcpA, PhtD, StkP-C, and PcsB-N), three H. influenzae proteins, and five M. catarrhalis proteins were measured using a multiplexed bead-based immunoassay. Antibody levels were analyzed using multilevel mixed-effects regression and Spearman's correlation. Antibody levels against pneumococcal proteins peaked at 3 to 5 years of age and then reached a plateau. Antibody levels against H. influenzae proteins peaked during the second year and then stabilized. Antibody levels against M. catarrhalis proteins peaked during the first year and then slowly decreased. Peak antibody levels during childhood were higher than those of adults. Correlations among pneumococcal antibody levels were highest among anti-CbpA, anti-PcpA, and anti-PhtD antibodies (r = 0.71 to 0.75; P < 0.001). The children presented 854 symptomatic respiratory infections on 586 occasions. Symptomatic respiratory infections did not improve prediction of antibody levels in the regression model. The maturation of immune responses against the investigated pneumococcal proteins shares similarities, especially among CbpA, PcpA, and PhtD. Antibody production against H. influenzae and M. catarrhalis proteins starts early in life and reaches peak levels earlier than antibody production against the pneumococcal proteins. Basal antibody levels are not related to the occurrence of symptomatic respiratory infections.
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Meriluoto M, Hedman L, Tanner L, Simell V, Mäkinen M, Simell S, Mykkänen J, Korpelainen J, Ruuskanen O, Ilonen J, Knip M, Simell O, Hedman K, Söderlund-Venermo M. Correction: Vol. 18, No. 2. Emerg Infect Dis 2016; 22:1695. [PMID: 27390872 PMCID: PMC4994360 DOI: 10.3201/eid2209.c12209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Liu Q, Zhang Z, Zheng Z, Zheng C, Liu Y, Hu Q, Ke X, Wang H. Human Bocavirus NS1 and NS1-70 Proteins Inhibit TNF-α-Mediated Activation of NF-κB by targeting p65. Sci Rep 2016; 6:28481. [PMID: 27329558 PMCID: PMC4916443 DOI: 10.1038/srep28481] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 06/03/2016] [Indexed: 12/25/2022] Open
Abstract
Human bocavirus (HBoV), a parvovirus, is a single-stranded DNA etiologic agent causing lower respiratory tract infections in young children worldwide. Nuclear factor kappa B (NF-κB) transcription factors play crucial roles in clearance of invading viruses through activation of many physiological processes. Previous investigation showed that HBoV infection could significantly upregulate the level of TNF-α which is a strong NF-κB stimulator. Here we investigated whether HBoV proteins modulate TNF-α–mediated activation of the NF-κB signaling pathway. We showed that HBoV NS1 and NS1-70 proteins blocked NF-κB activation in response to TNF-α. Overexpression of TNF receptor-associated factor 2 (TRAF2)-, IκB kinase alpha (IKKα)-, IκB kinase beta (IKKβ)-, constitutively active mutant of IKKβ (IKKβ SS/EE)-, or p65-induced NF-κB activation was inhibited by NS1 and NS1-70. Furthermore, NS1 and NS1-70 didn’t interfere with TNF-α-mediated IκBα phosphorylation and degradation, nor p65 nuclear translocation. Coimmunoprecipitation assays confirmed the interaction of both NS1 and NS1-70 with p65. Of note, NS1 but not NS1-70 inhibited TNF-α-mediated p65 phosphorylation at ser536. Our findings together indicate that HBoV NS1 and NS1-70 inhibit NF-κB activation. This is the first time that HBoV has been shown to inhibit NF-κB activation, revealing a potential immune-evasion mechanism that is likely important for HBoV pathogenesis.
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Affiliation(s)
- Qingshi Liu
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenfeng Zhang
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Zhenhua Zheng
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Caishang Zheng
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Yan Liu
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Qinxue Hu
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Xianliang Ke
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Hanzhong Wang
- Key Laboratory of Special Pathogens and Biosafety, Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
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Abstract
BACKGROUND Although human bocavirus type 1 (HBoV1) is a respiratory pathogen, presence of HBoV-DNA in secretions of asymptomatic children raised the question on the significance of HBoV-positive results. METHODS Archived specimens from a prospective, longitudinal study were tested for HBoV. A total of 94 children (aged 6-36 months) were HBoV(+) during 172 upper respiratory tract infection (URI) and/or acute otitis media (AOM) episodes. We used pyrosequencing of NP1, VP1 and VP2 genes to type HBoV and subtype HBoV1 in these specimens. RESULTS Of the specimens tested, HBoV-DNA were successfully sequenced in 128 (74%) samples from 70 children; all were HBoV type 1. Subtypes identified (n = 108) were LWK/TW (63%), LWK/BJ (20%), Bonn/BJ (16%) and LWK/KU3 (1%). Of 46 children for whom shedding pattern could be determined, viral clearance within 30 days (13-29 days) occurred in 28%; another 22% of children had no recurrence after 32-267 days. Prolonged virus presence of >30 days (34-181 days+) occurred in 22%; intermittent detection (61+ to 170+ days) in 20%. Infection with the same HBoV1 subtype after 4-5 negative samples (244 and 265 days interval) occurred in 4%. Infection with 2 different HBoV1 subtypes (29 and 87 days apart) occurred in only 4%. Newly acquired HBoV1-URI resulted in AOM in 53% of cases. CONCLUSIONS Children with HBoV1 infection commonly shed for a prolonged period leading to repeated viral DNA detection. Recurrence after 8-9 months suggests possible persistence and reactivation. Infections with 2 different HBoV1 subtypes within 1-year period are uncommon. Newly acquired HBoV1-URI is often complicated by AOM.
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Mapping Antigenic Epitopes on the Human Bocavirus Capsid. J Virol 2016; 90:4670-4680. [PMID: 26912619 DOI: 10.1128/jvi.02998-15] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 02/18/2016] [Indexed: 02/06/2023] Open
Abstract
UNLABELLED Human bocaviruses (HBoV1 to -4) are emerging pathogens associated with pneumonia and/or diarrhea in young children. Currently, there is no treatment or vaccination, so there is a need to study these pathogens to understand their disease mechanisms on a molecular and structural level for the development of control strategies. Here, we report the structures of six HBoV monoclonal antibody (MAb) fragment complexes, HBoV1-15C6, HBoV2-15C6, HBoV4-15C6, HBoV1-4C2, HBoV1-9G12, and HBoV1-12C1, determined by cryo-electron microscopy and three-dimensional image reconstruction to 18.0- to 8.5-Å resolution. Of these, the 15C6 MAb cross-reacted with HBoV1, HBoV2, and HBoV4, while the 4C2, 12C1, and 9G12 MAbs recognized only HBoV1. Pseudoatomic modeling mapped the 15C6 footprint to the capsid surface DE and HI loops, at the 5-fold axis and the depression surrounding it, respectively, which are conserved motifs in Parvoviridae The footprints for 4C2, 12C1, and 9G12 span the surface loops that assemble portions of the 2-/5-fold wall (a raised surface feature between the 2-fold and 5-fold axes of symmetry) and the shoulder of the 3-fold protrusions. The MAb footprints, cross reactive and strain specific, coincide with regions with high and low sequence/structural identities, respectively, on the capsid surfaces of the HBoVs and identify potential regions for the development of peptide vaccines for these viruses. IMPORTANCE Human bocaviruses (HBoVs) may cause severe respiratory and gastrointestinal infections in young children. The nonenveloped parvovirus capsid carries determinants of host and tissue tropism, pathogenicity, genome packaging, assembly, and antigenicity important for virus infection. This information is currently unavailable for the HBoVs and other bocaparvoviruses. This study identifies three strain-specific antigenic epitopes on the HBoV1 capsid and a cross-reactive epitope on the HBoV1, HBoV2, and HBoV4 capsids using structures of capsid-antibody complexes determined using cryo-electron microscopy and image reconstruction. This is the first study to report the highly conserved parvovirus DE loop at the 5-fold axis as a determinant of antigenicity. Additionally, knowledge of the strain-specific and conserved antigenic epitopes of the bocaviruses can be instrumental in characterization of the virus life cycle, development of peptide vaccines, and generation of gene delivery vectors for cystic fibrosis given the strict tropism of HBoV1 for human airway epithelial cells.
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Replication of an Autonomous Human Parvovirus in Non-dividing Human Airway Epithelium Is Facilitated through the DNA Damage and Repair Pathways. PLoS Pathog 2016; 12:e1005399. [PMID: 26765330 PMCID: PMC4713420 DOI: 10.1371/journal.ppat.1005399] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/22/2015] [Indexed: 01/11/2023] Open
Abstract
Human bocavirus 1 (HBoV1) belongs to the genus Bocaparvovirus of the Parvoviridae family, and is an emerging human pathogenic respiratory virus. In vitro, HBoV1 infects well-differentiated/polarized primary human airway epithelium (HAE) cultured at an air-liquid interface (HAE-ALI). Although it is well known that autonomous parvovirus replication depends on the S phase of the host cells, we demonstrate here that the HBoV1 genome amplifies efficiently in mitotically quiescent airway epithelial cells of HAE-ALI cultures. Analysis of HBoV1 DNA in infected HAE-ALI revealed that HBoV1 amplifies its ssDNA genome following a typical parvovirus rolling-hairpin DNA replication mechanism. Notably, HBoV1 infection of HAE-ALI initiates a DNA damage response (DDR) with activation of all three phosphatidylinositol 3-kinase–related kinases (PI3KKs). We found that the activation of the three PI3KKs is required for HBoV1 genome amplification; and, more importantly, we identified that two Y-family DNA polymerases, Pol η and Pol κ, are involved in HBoV1 genome amplification. Overall, we have provided an example of de novo DNA synthesis (genome amplification) of an autonomous parvovirus in non-dividing cells, which is dependent on the cellular DNA damage and repair pathways. Parvovirus is unique among DNA viruses. It has a single stranded DNA genome of ~5.5 kb in length. Autonomous parvoviruses, which replicate autonomously in cells, rely on the S phase cell cycle for genome amplification. In the current study, we demonstrated that human bocavirus 1 (HBoV1), an autonomous human Bocaparvovirus, replicates its genome in well-differentiated (non-dividing) primary human airway epithelial cells. HBoV1 infection of non-dividing human airway epithelial cells induces a DNA damage response. We provide evidence that HBoV1 genome amplification in non-dividing airway epithelial cells is facilitated by the DNA damage response-mediated signaling pathways. Importantly, we discovered that two Y-family DNA repair polymerases, but not cellular DNA replication polymerases, are directly involved in HBoV1 genome amplification. Therefore, our study is innovative because it is the first to show that an autonomous parvovirus amplifies its genome in non-dividing cells, and that the DNA repair polymerases are involved in viral genome amplification.
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Schildgen O, Schildgen V. Respiratory infections of the human bocavirus. THE MICROBIOLOGY OF RESPIRATORY SYSTEM INFECTIONS 2016. [PMCID: PMC7149820 DOI: 10.1016/b978-0-12-804543-5.00005-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The human bocavirus is one of the most common respiratory viruses and occurs in all age groups. It is associated with upper and lower respiratory tract infections, and causes clinical symptoms from the mild common cold to life threatening respiratory diseases. Besides its ability to persist the virus appears to trigger chronic lung disease and increase the clinical symptoms, while being a putative trigger for fibrotic lung diseases. Laboratory diagnostics should include serological diagnostics in order to rule out a viremia because due to prolonged viral shedding acute and chronic infections cannot be differentiated on the detection of viral nucleic acids in respiratory specimen alone. Although Koch’s postulates cannot be formally fulfilled due to the lack of an animal model and the chance for clinical trials with volunteers are limited due to the long term effects of HBoV infections, there is no doubt that the virus is a serious pathogen and requires attention. The aim of the chapter is to present an overview of our current knowledge on respiratory infections with the human bocavirus, and to provide basic and essential information on clinical features, molecular diagnostics, and epidemiologic challenges arising with this pathogen.
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García‐Arroyo L, Prim N, Martí N, Roig MC, Navarro F, Rabella N. Benefits and drawbacks of molecular techniques for diagnosis of viral respiratory infections. Experience with two multiplex PCR assays. J Med Virol 2016; 88:45-50. [PMID: 26100363 PMCID: PMC7166422 DOI: 10.1002/jmv.24298] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2015] [Indexed: 11/08/2022]
Abstract
Molecular techniques have represented a major step forward in the diagnosis of viral respiratory infections. They are considered highly sensitive and specific compared to conventional techniques. In this study two nucleic acid amplification tests (NAATs) were compared to conventional methods (immunofluorescence and viral culture). The aim of this work was to discuss the clinical interpretation of the results obtained by NAATs on the basis of the two-decade experience of our group and the literature. Eighty nasopharyngeal aspirates were collected from children under six years attended for acute respiratory illness at the pediatric emergency room of a third level Hospital. Both NAATs tested (Seeplex(®) and Clart(®)) showed an overall higher performance regarding sensitivity (76% and 90%, respectively). Compared to Seeplex(®), the Clart(®) system tripled the number of multiple detections (8 by Seeplex(®) vs. 25 by Clart(®)). In some specimens both NAATs detected different viruses. Given these discrepancies and the fact that detection of viral nucleic acids is not necessarily related to the current clinical syndrome, the interpretation of molecular results may not always be so straightforward. The pros and cons of NAATs should always be taken into account when giving a result.
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Affiliation(s)
| | - Núria Prim
- Servei de Microbiologia, Hospital de la Santa Creu i Sant PauBarcelonaSpain
| | - Neus Martí
- Servei de Microbiologia, Hospital de la Santa Creu i Sant PauBarcelonaSpain
| | - Maria Carme Roig
- Servei de Microbiologia, Hospital de la Santa Creu i Sant PauBarcelonaSpain
| | - Ferran Navarro
- Servei de Microbiologia, Hospital de la Santa Creu i Sant PauBarcelonaSpain
- Departament de Genètica i de MicrobiologiaUniversitat Autònoma de BarcelonaBarcelonaSpain
| | - Núria Rabella
- Servei de Microbiologia, Hospital de la Santa Creu i Sant PauBarcelonaSpain
- Departament de Genètica i de MicrobiologiaUniversitat Autònoma de BarcelonaBarcelonaSpain
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A novel primer set for improved direct gene sequencing of human bocavirus genotype-1 from clinical samples. J Virol Methods 2015; 228:108-13. [PMID: 26658621 DOI: 10.1016/j.jviromet.2015.11.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 11/27/2015] [Accepted: 11/29/2015] [Indexed: 02/07/2023]
Abstract
Human bocavirus genotype (HBoV-1) is a parvovirus associated with respiratory tract infections in children with different degrees of severity. The current study intended to improve the direct gene sequencing of the HBoV-1 using a newly developed primer set. Screening the presence of human bocavirus infection among in-patients children suffering from lower respiratory tract infections was another aim of the current study. Nasopharyngeal swab samples from in-patients children suffering from lower respiratory tract infections were examined. The real-time polymerase chain reaction was used for the initial screening as a highly sensitive method to detect the HBoV. Genotyping of real-time positive samples was attempted by direct sequencing of PCR amplicons using NP, VP1/2 and the newly developed VP/NC primers. HBoV-1 was present in 56.8% of the examined children. The newly developed primer set successfully amplified all real-time PCR positive samples, however, the other primer pairs did not reliably detect real-time PCR positive samples. The gene sequences of the detected HBoV-1 showed conserved sequences to each other with a low rate of discrepancies. The high rate of infection and the similarity between the detected strains strongly suggest nosocomial infections.
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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: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [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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45
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Broccolo F, Falcone V, Esposito S, Toniolo A. Human bocaviruses: Possible etiologic role in respiratory infection. J Clin Virol 2015; 72:75-81. [PMID: 26441386 DOI: 10.1016/j.jcv.2015.09.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 09/16/2015] [Accepted: 09/22/2015] [Indexed: 12/24/2022]
Abstract
Four species of human bocaviruses (HBoV) are currently included in the Bocavirus genus. There is satisfactory evidence demonstrating an association between HBoV1 and respiratory disease in children, and there is evidence that HBoV2 (and possibly the HBoV3 and HBoV4 species) are associated with gastroenteritis. In particular, HBoV1 has been associated with a prolonged period of persistence in the mucosa of the respiratory tract. Virus persistence does play a role in the high frequency of co-infections with proper pathogens of the upper and lower respiratory tracts. The high detection rate of multiple respiratory viruses in up to 83% of respiratory specimens and the presence of asymptomatic HBoV1 infections complicate the elucidation of the pathogenic role of the agent. Overall, a large amount of data are available concerning HBoV1, whereas little information is available about other bocavirus species. High viral loads are often associated with symptoms, and viremia may be associated with systemic manifestations such as encephalopathy. The effects and mechanisms of latency, persistence, reactivation, and reinfection are poorly understood. Thus, particularly in co-infections, the pathogenic contribution of the detected bocavirus species cannot be accurately stated. This review summarizes the current knowledge of HBoV species and provides perspectives for future clinical studies.
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Affiliation(s)
- Francesco Broccolo
- Department of Health Sciences, University of Milano-Bicocca, Milano, Italy.
| | - Valeria Falcone
- Department of Virology, Freiburg University Medical Center, Hermann-Herder-Strasse 11, 79104 Freiburg, Germany
| | - Susanna Esposito
- Pediatric Highly Intensive Care Unit, Department of Pathophysiology and Transplantation, Università Degli Studi di Milano, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Antonio Toniolo
- Laboratory of Clinical Microbiology, Ospedale di Circolo e Fondazione Macchi, University of Insubria, Varese, Italy
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Abstract
UNLABELLED Human bocavirus 1 (HBoV1) is a single-stranded DNA parvovirus that causes lower respiratory tract infections in young children worldwide. In this study, we identified novel splice acceptor and donor sites, namely, A1' and D1', in the large nonstructural protein (NS1)-encoding region of the HBoV1 precursor mRNA. The novel small NS proteins (NS2, NS3, and NS4) were confirmed to be expressed following transfection of an HBoV1 infectious proviral plasmid and viral infection of polarized human airway epithelium cultured at an air-liquid interface (HAE-ALI). We constructed mutant pIHBoV1 infectious plasmids which harbor silent mutations (sm) smA1' and smD1' at the A1' and D1' splice sites, respectively. The mutant infectious plasmids maintained production of HBoV1 progeny virions at levels less than five times lower than that of the wild-type plasmid. Importantly, the smA1' mutant virus that does not express NS3 and NS4 replicated in HAE-ALI as effectively as the wild-type virus; however, the smD1' mutant virus that does not express NS2 and NS4 underwent an abortive infection in HAE-ALI. Thus, our study identified three novel NS proteins, NS2, NS3, and NS4, and suggests an important function of the NS2 protein in HBoV1 replication in HAE-ALI. IMPORTANCE Human bocavirus 1 infection causes respiratory diseases, including acute wheezing in infants, of which life-threatening cases have been reported. In vitro, human bocavirus 1 infects polarized human bronchial airway epithelium cultured at an air-liquid interface that mimics the environment of human lower respiratory airways. Viral nonstructural proteins are often important for virus replication and pathogenesis in infected tissues or cells. In this report, we identified three new nonstructural proteins of human bocavirus 1 that are expressed during infection of polarized human bronchial airway epithelium. Among them, we proved that one nonstructural protein is critical to the replication of the virus in polarized human bronchial airway epithelium. The creation of nonreplicating infectious HBoV1 mutants may have particular utility in vaccine development for this virus.
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47
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Bubshait DK, Albuali WH, Yousef AA, Obeid OE, Alkharsah KR, Hassan MI, Vatte C, Alzahrani AJ, Bukhari H. Clinical description of human bocavirus viremia in children with LRTI, Eastern Province, Saudi Arabia. Ann Thorac Med 2015; 10:146-9. [PMID: 25829968 PMCID: PMC4375745 DOI: 10.4103/1817-1737.151437] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Accepted: 07/22/2014] [Indexed: 11/04/2022] Open
Abstract
Human bocavirus (HBoV) is a major etiology of lower respiratory tract infection (LRTI) in young children. We tested 149 patients admitted to King Fahd Hospital of the University with diagnosis of LRTI. Viremia caused by the different studied viruses was detected in 31.5% of the total cases by Real-time Polymerase chain reaction. We report five patients who were positive for HBoV in serum samples. Clinical presentation ranged from mild to severe disease as one of them required admission to intensive care unit. Wheezing was a striking feature in most of our patients, but fever was not a consistent finding.
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Affiliation(s)
- Dalal K Bubshait
- Department of Pediatrics, University of Dammam, Dammam, Saudi Arabia
| | | | - Abdullah A Yousef
- Department of Pediatrics, University of Dammam, Dammam, Saudi Arabia
| | | | - Khaled R Alkharsah
- Prince Mohammed Bin Fahd Center for Research and Consultation Studies, University of Dammam, Dammam, Saudi Arabia
| | | | - Chittibabu Vatte
- Prince Mohammed Bin Fahd Center for Research and Consultation Studies, University of Dammam, Dammam, Saudi Arabia
| | - Alhusain J Alzahrani
- Department of Clinical Laboratory Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Huda Bukhari
- Department of Medicine, University of Dammam, Dammam, Saudi Arabia
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48
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Abstract
PURPOSE OF REVIEW Acute otitis media occurs as a complication of viral upper respiratory tract infection. Bacterial otopathogens and respiratory viruses interact and play important roles in acute otitis media development. A better understanding of viral and bacterial interactions may lead to innovative ways to lessen the burden of this common childhood disease. RECENT FINDINGS There has been increasing evidence that acute otitis media occurs during upper respiratory infection, even in the absence of nasopharyngeal bacterial colonization. Among the types of viruses associated with acute otitis media, respiratory syncytial virus continues to be the most commonly detected. It is still unclear whether viral load plays an important role in acute otitis media development, but symptomatic upper respiratory tract infection (as opposed to asymptomatic viral infection) is crucial. Widespread use of bacterial and viral vaccines in young children, including pneumococcal conjugate and influenza vaccines, has led to the reduction in otitis media-related healthcare use between 2001 and 2011. There has been no new vaccine against respiratory viruses other than influenza. SUMMARY Progress has been made toward the reduction of the burden of acute otitis media in the last decade. Success in reducing acute otitis media incidence will rely mainly on prevention of nasopharyngeal otopathogen colonization, as well as reduction in the incidence of viral upper respiratory tract infection.
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49
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Pellett PE. Indictment by Association: Once Is Not Enough. J Infect Dis 2015; 212:509-12. [PMID: 25632040 PMCID: PMC4512607 DOI: 10.1093/infdis/jiv045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 01/22/2015] [Indexed: 01/11/2023] Open
Affiliation(s)
- Philip E Pellett
- Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, Michigan
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50
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Martin ET, Kuypers J, McRoberts JP, Englund JA, Zerr DM. Human Bocavirus 1 Primary Infection and Shedding in Infants. J Infect Dis 2015; 212:516-24. [PMID: 25632039 DOI: 10.1093/infdis/jiv044] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 12/09/2014] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Human bocavirus 1 (HBoV-1) is frequently detected in young children. The role of HBoV-1 in respiratory illness is unclear, owing to frequent detection in asymptomatic children. METHODS Weekly oral fluid samples from a longitudinal cohort of infants were tested by quantitative polymerase chain reaction for HBoV-1 DNA. Symptoms during HBoV-1 primary shedding events were compared to those during 14-day control periods occurring 1 month prior to and following the primary event. Eight single-nucleotide polymorphisms were analyzed to assess HBoV-1 variants. RESULTS Sixty-six of 87 children (76%), followed for at least 18 months from birth, had a primary HBoV-1 infection. HBoV-1 was consistently detected for >1 month (maximum duration, 402 days) following 42 of 66 primary shedding events. Children were more likely to experience new cough symptoms (odds ratio [OR], 2.7; 95% confidence interval [CI], 1.4-5.5) and to visit a healthcare provider (OR, 2.8; 95% CI, 1.02-7.7) during the 14 days surrounding the time of initial detection of HBoV-1. Recurrent HBoV-1 shedding events were found in 33 children (50%). Twelve of 48 children with HBoV-1 variant data had multiple viral allelic patterns over time. CONCLUSIONS HBoV-1 primary shedding events are associated with mild respiratory illness with subsequent prolonged detection of HBoV-1 DNA for up to a year. HBoV-1 reinfection contributes to long-term shedding.
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Affiliation(s)
| | | | | | - Janet A Englund
- University of Washington Seattle Children's Research Institute, Washington
| | - Danielle M Zerr
- University of Washington Seattle Children's Research Institute, Washington
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