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Abstract
Asthma is the most common chronic disease in children. Asthma is a heterogeneous disease characterized by variable, reversible airway obstruction and hyper-responsive airways. There is a high economic burden due to a child having poorly controlled asthma with one or more asthma exacerbations resulting in an emergency department visit or hospitalization in a year. Publications on diagnosis, treatment, and management of pediatric asthma are ongoing with over 2,549 papers published from January-November 2022. The intent of this paper is to summarize 8 key topics that have prompted discussions with local, regional, and national asthma experts due to a shift in clinical practice or lessons learned from the recent pandemic that may have future application.
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Affiliation(s)
- Joyce A Baker
- Breathing Institute, Children's Hospital Colorado, Aurora, Colorado.
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2
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Seifert R, Bugert JJ. cCMP and cUMP phosphodiesterases in viral infections. Trends Biochem Sci 2023; 48:835-838. [PMID: 37365086 DOI: 10.1016/j.tibs.2023.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/23/2023] [Accepted: 05/31/2023] [Indexed: 06/28/2023]
Abstract
In bacteria, cCMP and cUMP have a key role in defense against infection with bacterial viruses. Bacteriophages encode phosphodiesterases (PDEs; 'nucleases'; Apyc1), which cleave cCMP/cUMP, counteracting this defense. We propose that PDEs are of broader biological relevance, including cCMP/cUMP-cleaving PDEs of eukaryotic viruses, which may constitute new drug targets.
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Affiliation(s)
- Roland Seifert
- Institute of Pharmacology, Hannover Medical School, Carl-Neuberg-Strasse 1, D-30625 Hannover, Germany.
| | - Joachim J Bugert
- Institute of Microbiology of the Bundeswehr, Neuherbergstrasse 11, D-80937 Munich, Germany
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3
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Baumann I, Hage R, Gasche-Soccal P, Aubert JD, Schuurmans MM. Impact of SARS-CoV-2-Related Hygiene Measures on Community-Acquired Respiratory Virus Infections in Lung Transplant Recipients in Switzerland. Medicina (Kaunas) 2023; 59:1473. [PMID: 37629763 PMCID: PMC10456728 DOI: 10.3390/medicina59081473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 08/02/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023]
Abstract
Background and Objectives: Community-acquired respiratory virus (CARV) infections pose a serious risk for lung transplant recipients (LTR) as they are prone to severe complications. When the COVID-19 pandemic hit Switzerland in 2020, the government implemented hygiene measures for the general population. We investigated the impact of these measures on the transmission of CARV in lung transplant recipients in Switzerland. Materials and Methods: In this multicenter, retrospective study of lung transplant recipients, we investigated two time periods: the year before the COVID-19 pandemic (1 March 2019-29 February 2020) and the first year of the pandemic (1 March 2020-28 February 2021). Data were mainly collected from the Swiss Transplant Cohort Study (STCS) database. Descriptive statistics were used to analyze the results. Results: Data from 221 Swiss lung transplant cohort patients were evaluated. In the year before the COVID-19 pandemic, 157 infections were diagnosed compared to 71 infections in the first year of the pandemic (decline of 54%, p < 0.001). Influenza virus infections alone showed a remarkable decrease from 17 infections before COVID-19 to 2 infections after the beginning of the pandemic. No significant difference was found in testing behavior; 803 vs. 925 tests were obtained by two of the three centers during the respective periods. Conclusions: We observed a significant decline in CARV infections in the Swiss lung transplant cohort during the first year of the COVID-19 pandemic. These results suggest a relevant impact of hygiene measures when implemented in the population due to the COVID-19 pandemic on the incidence of CARV infections.
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Affiliation(s)
- Isabelle Baumann
- Faculty of Medicine, University of Zurich, 8032 Zurich, Switzerland; (I.B.)
- Division of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - René Hage
- Faculty of Medicine, University of Zurich, 8032 Zurich, Switzerland; (I.B.)
- Division of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Paola Gasche-Soccal
- Division of Pulmonology, University Hospitals Geneva, 1205 Geneva, Switzerland
| | - John-David Aubert
- Division of Pulmonology, University Hospital Lausanne, 1011 Lausanne, Switzerland
| | - Macé M. Schuurmans
- Faculty of Medicine, University of Zurich, 8032 Zurich, Switzerland; (I.B.)
- Division of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
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4
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Upham JW. Can Allergen Immunotherapy Improve Antiviral Immunity in Patients with Allergic Asthma? Am J Respir Crit Care Med 2023; 207:1112-1114. [PMID: 36812499 PMCID: PMC10161755 DOI: 10.1164/rccm.202302-0234ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Affiliation(s)
- John W Upham
- The University of Queensland, 1974, Faculty of Medicine, Brisbane, Queensland, Australia;
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5
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Lebsir N, Zoulim F, Grigorov B. Heparanase-1: From Cancer Biology to a Future Antiviral Target. Viruses 2023; 15:237. [PMID: 36680276 PMCID: PMC9860851 DOI: 10.3390/v15010237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Heparan sulfate proteoglycans (HSPGs) are a major constituent of the extracellular matrix (ECM) and are found to be implicated in viral infections, where they play a role in both cell entry and release for many viruses. The enzyme heparanase-1 is the only known endo-beta-D-glucuronidase capable of degrading heparan sulphate (HS) chains of HSPGs and is thus important for regulating ECM homeostasis. Heparanase-1 expression is tightly regulated as the uncontrolled cleavage of HS may result in abnormal cell activation and significant tissue damage. The overexpression of heparanase-1 correlates with pathological scenarios and is observed in different human malignancies, such as lymphoma, breast, colon, lung, and hepatocellular carcinomas. Interestingly, heparanase-1 has also been documented to be involved in numerous viral infections, e.g., HSV-1, HPV, DENV. Moreover, very recent reports have demonstrated a role of heparanase-1 in HCV and SARS-CoV-2 infections. Due to the undenied pro-carcinogenic role of heparanase-1, multiple inhibitors have been developed, some reaching phase II and III in clinical studies. However, the use of heparanase inhibitors as antivirals has not yet been proposed. If it can be assumed that heparanase-1 is implicated in numerous viral life cycles, its inhibition by specific heparanase-acting compounds should result in a blockage of viral infection. This review addresses the perspectives of using heparanase inhibitors, not only for cancer treatment, but also as antivirals. Eventually, the development of a novel class antivirals targeting a cellular protein could help to alleviate the resistance problems seen with some current antiretroviral therapies.
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Affiliation(s)
- Nadjet Lebsir
- Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69434 Lyon, France
- Confluence: Sciences et Humanités (EA 1598), UCLy, 10 Place des Archives, 69002 Lyon, France
| | - Fabien Zoulim
- Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69434 Lyon, France
- Hospices Civils de Lyon, 69002 Lyon, France
| | - Boyan Grigorov
- Université Claude Bernard Lyon 1, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, 69434 Lyon, France
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6
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Liang Y, Fang D, Gao X, Deng X, Chen N, Wu J, Zeng M, Luo M. Circulating microRNAs as emerging regulators of COVID-19. Theranostics 2023; 13:125-147. [PMID: 36593971 PMCID: PMC9800721 DOI: 10.7150/thno.78164] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/06/2022] [Indexed: 12/03/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19), an infectious disease caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is a global pandemic that has high incidence rates, spreads rapidly, and has caused more than 6.5 million deaths globally to date. Currently, several drugs have been used in the clinical treatment of COVID-19, including antivirals (e.g., molnupiravir, baricitinib, and remdesivir), monoclonal antibodies (e.g., etesevimab and tocilizumab), protease inhibitors (e.g., paxlovid), and glucocorticoids (e.g., dexamethasone). Increasing evidence suggests that circulating microRNAs (miRNAs) are important regulators of viral infection and antiviral immune responses, including the biological processes involved in regulating COVID-19 infection and subsequent complications. During viral infection, both viral genes and host cytokines regulate transcriptional and posttranscriptional steps affecting viral replication. Virus-encoded miRNAs are a component of the immune evasion repertoire and function by directly targeting immune functions. Moreover, several host circulating miRNAs can contribute to viral immune escape and play an antiviral role by not only promoting nonstructural protein (nsp) 10 expression in SARS coronavirus, but among others inhibiting NOD-like receptor pyrin domain-containing (NLRP) 3 and IL-1β transcription. Consequently, understanding the expression and mechanism of action of circulating miRNAs during SARS-CoV-2 infection will provide unexpected insights into circulating miRNA-based studies. In this review, we examined the recent progress of circulating miRNAs in the regulation of severe inflammatory response, immune dysfunction, and thrombosis caused by SARS-CoV-2 infection, discussed the mechanisms of action, and highlighted the therapeutic challenges involving miRNA and future research directions in the treatment of COVID-19.
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Affiliation(s)
- Yu Liang
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,College of Integrated Traditional Chinese and Western Medicine, Affiliated Hospital of Traditional Chinese Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Dan Fang
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Xiaojun Gao
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Xin Deng
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Ni Chen
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Jianbo Wu
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China
| | - Min Zeng
- Department of Pharmacy, the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China.,✉ Corresponding authors: Mao Luo and Min Zeng, Postal address: Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center of Southwest Medical University and Department of Pharmacy of the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China. E-mail addresses: (M. LUO), (M. Zeng)
| | - Mao Luo
- Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center, Southwest Medical University, Luzhou, China.,College of Integrated Traditional Chinese and Western Medicine, Affiliated Hospital of Traditional Chinese Medicine, Southwest Medical University, Luzhou, Sichuan, China.,Laboratory for Cardiovascular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China.,✉ Corresponding authors: Mao Luo and Min Zeng, Postal address: Key Laboratory of Medical Electrophysiology, Ministry of Education, Drug Discovery Research Center of Southwest Medical University and Department of Pharmacy of the Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China. E-mail addresses: (M. LUO), (M. Zeng)
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7
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Armero G, Penela-Sánchez D, Belmonte J, Gómez-Barroso D, Larrauri A, Henares D, Vallejo V, Jordan I, Muñoz-Almagro C, Brotons P, Launes C. Concentrations of nitrogen compounds are related to severe rhinovirus infection in infants. A time-series analysis from the reference area of a pediatric university hospital in Barcelona. Pediatr Pulmonol 2022; 57:2180-2188. [PMID: 35652447 PMCID: PMC9543680 DOI: 10.1002/ppul.26021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/17/2022] [Accepted: 05/29/2022] [Indexed: 11/14/2022]
Abstract
BACKGROUND There is scarce information focused on the effect of weather conditions and air pollution on specific acute viral respiratory infections, such as rhinovirus (RV), with a wide clinical spectrum of severity. OBJECTIVE The aim of this study was to analyze the association between episodes of severe respiratory tract infection by RV and air pollutant concentrations (NOx and SO2 ) in the reference area of a pediatric university hospital. METHODS An analysis of temporal series of daily values of NOx and SO2 , weather variables, circulating pollen and mold spores, and daily number of admissions in the pediatric intensive care unit (PICU) with severe respiratory RV infection (RVi) in children between 6 months and 18 years was performed. Lagged variables for 0-5 days were considered. The study spanned from 2010 to 2018. Patients with comorbidities were excluded. RESULTS One hundred and fifty patients were admitted to the PICU. Median age was 19 months old (interquartile range [IQR]: 11-47). No relationship between RV-PICU admissions and temperature, relative humidity, cumulative rainfall, or wind speed was found. Several logistic regression models with one pollutant and two pollutants were constructed but the best model was that which included average daily NOx concentrations. Average daily NOx concentrations were related with the presence of PICU admissions 3 days later (odds ratio per IQR-unit increase: 1.64, 95% confidence interval: 1.20-2.25)). CONCLUSIONS This study has shown a positive correlation between NOx concentrations at Lag 3 and children's PICU admissions with severe RV respiratory infection. Air pollutant data should be taken into consideration when we try to understand the severity of RVis.
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Affiliation(s)
- Georgina Armero
- Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain.,Pediatrics Intensive Care Unit, Hospital Sant Joan de Déu, Barcelona, Spain
| | | | - Jordina Belmonte
- Botanic Unit of Animal Biology, Vegetal Biology and Ecology Department, Science and Ambiental Technology Institute, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Diana Gómez-Barroso
- Centro Nacional de Epidemiología, Instituto de Salud Carlos III, Madrid, Spain.,Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Amparo Larrauri
- Centro Nacional de Epidemiología, Instituto de Salud Carlos III, Madrid, Spain.,Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain
| | - Desiree Henares
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Grupo de investigación en enfermedades infecciosas pediátricas, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain
| | - Violeta Vallejo
- Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Iolanda Jordan
- Pediatrics Intensive Care Unit, Hospital Sant Joan de Déu, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Grupo de investigación en enfermedades infecciosas pediátricas, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain.,Departament de Cirurgia i Especialitats Medicoquirúrgiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain
| | - Carmen Muñoz-Almagro
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Grupo de investigación en enfermedades infecciosas pediátricas, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain.,Molecular Microbiology Department, Hospital Sant Joan de Déu, Barcelona, Spain.,Department of Medicine, School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Pedro Brotons
- Grupo de investigación en enfermedades infecciosas pediátricas, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain.,Department of Medicine, School of Medicine, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Cristian Launes
- Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.,Grupo de investigación en enfermedades infecciosas pediátricas, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Spain.,Departament de Cirurgia i Especialitats Medicoquirúrgiques, Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona, Barcelona, Spain
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8
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Saifulazmi NF, Rohani ER, Harun S, Bunawan H, Hamezah HS, Nor Muhammad NA, Azizan KA, Ahmed QU, Fakurazi S, Mediani A, Sarian MN. A Review with Updated Perspectives on the Antiviral Potentials of Traditional Medicinal Plants and Their Prospects in Antiviral Therapy. Life (Basel) 2022; 12:1287. [PMID: 36013466 DOI: 10.3390/life12081287] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/14/2022] [Accepted: 08/16/2022] [Indexed: 02/06/2023]
Abstract
Exploration of the traditional medicinal plants is essential for drug discovery and development for various pharmacological targets. Various phytochemicals derived from medicinal plants were extensively studied for antiviral activity. This review aims to highlight the role of medicinal plants against viral infections that remains to be the leading cause of human death globally. Antiviral properties of phytoconstituents isolated from 45 plants were discussed for five different types of viral infections. The ability of the plants’ active compounds with antiviral effects was highlighted as well as their mechanism of action, pharmacological studies, and toxicological data on a variety of cell lines. The experimental values, such as IC50, EC50, CC50, ED50, TD50, MIC100, and SI of the active compounds, were compiled and discussed to determine their potential. Among the plants mentioned, 11 plants showed the most promising medicinal plants against viral infections. Sambucus nigra and Clinacanthus nutans manifested antiviral activity against three different types of viral infections. Echinacea purpurea, Echinacea augustofolia, Echinacea pallida, Plantago major, Glycyrrhiza uralensis, Phyllanthus emblica, Camellia sinensis, and Cistus incanus exhibited antiviral activity against two different types of viral infections. Interestingly, Nicotiana benthamiana showed antiviral effects against mosquito-borne infections. The importance of phenolic acids, alkamides, alkylamides, glycyrrhizin, epicatechin gallate (ECG), epigallocatechin gallate (EGCG), epigallocatechin (EGC), protein-based plant-produced ZIKV Envelope (PzE), and anti-CHIKV monoclonal antibody was also reviewed. An exploratory approach to the published literature was conducted using a variety of books and online databases, including Scopus, Google Scholar, ScienceDirect, Web of Science, and PubMed Central, with the goal of obtaining, compiling, and reconstructing information on a variety of fundamental aspects, especially regarding medicinal plants. This evaluation gathered important information from all available library databases and Internet searches from 1992 to 2022.
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9
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Guyot G, Sayah S, Guernouti S, Mélois A. Role of ventilation on the transmission of viruses in buildings, from a single zone to a multizone approach. Indoor Air 2022; 32:e13097. [PMID: 36040282 PMCID: PMC9541182 DOI: 10.1111/ina.13097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 07/07/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
In a virus pandemic context, buildings ventilation has been recognized as a solution for preventing transmission of the virus in aerosolized form. The impact of the widespread recommendation of window opening and sealing door on ventilation circuits needs to be considered with a multizone approach. We modeled the airflow distribution in a building where people are isolating in a pandemic context, including one infected person. We analyzed the impact of opening the window and sealing the door in the quarantine room on exposures and probability of infection for occupants of the flat and of adjacent flats. In order to study the sensitivity of the results, we tested three ventilation systems: balanced, exhaust-only, and humidity-based demand-controlled, and several window- and door-opening strategies. When the door of the quarantine room is sealed, we observe that opening the window in the quarantine room always results in increased exposure and probability of infection for at least one other occupant, including in neighbors' apartments. When all internal doors are opened, we observe moderate impacts, with rather an increase of exposure of the occupants of the same apartments and of their probability of infection, and a decrease for the occupants located in other apartments. Based on the analysis on the airflows distribution in this case study, we conclude that sealing the internal door has more influence than opening the window of the quarantine room, whatever the ventilation system. We observe that this widespread recommendation to open the window of a quarantine room and to seal the door is based on the consideration of a single zone model. We illustrate the importance of moving from such a single zone approach to a multizone approach for quantifying ventilation and airing impacts in multizone buildings as residences in order to prevent epidemics of viruses such as SARS-CoV-2. It highlights the need of air leakage databases.
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Affiliation(s)
- Gaëlle Guyot
- CeremaBPE Research TeamNantesFrance
- University of Savoie Mont Blanc, CNRS, LOCIEChambéryFrance
| | | | - Sihem Guernouti
- CeremaBPE Research TeamNantesFrance
- University of Savoie Mont Blanc, CNRS, LOCIEChambéryFrance
| | - Adeline Mélois
- CeremaBPE Research TeamNantesFrance
- University of Savoie Mont Blanc, CNRS, LOCIEChambéryFrance
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10
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Sharma NR, Zheng ZM. RNA Granules in Antiviral Innate Immunity: A Kaposi's Sarcoma-Associated Herpesvirus Journey. Front Microbiol 2022; 12:794431. [PMID: 35069491 PMCID: PMC8767106 DOI: 10.3389/fmicb.2021.794431] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/02/2021] [Indexed: 11/18/2022] Open
Abstract
RNA granules are cytoplasmic, non-membranous ribonucleoprotein compartments that form ubiquitously and are often referred to as foci for post-transcriptional gene regulation. Recent research on RNA processing bodies (PB) and stress granules (SG) has shown wide implications of these cytoplasmic RNA granules and their components in suppression of RNA translation as host intracellular innate immunity against infecting viruses. Many RNA viruses either counteract or co-opt these RNA granules; however, many fundamental questions about DNA viruses with respect to their interaction with these two RNA granules remain elusive. Kaposi’s sarcoma-associated herpesvirus (KSHV), a tumor-causing DNA virus, exhibits two distinct phases of infection and encodes ∼90 viral gene products during the lytic phase of infection compared to only a few (∼5) during the latent phase. Thus, productive KSHV infection relies heavily on the host cell translational machinery, which often links to the formation of PB and SG. One major question is how KSHV counteracts the hostile environment of RNA granules for its productive infection. Recent studies demonstrated that KSHV copes with the translational suppression by cellular RNA granules, PB and SG, by expressing ORF57, a viral RNA-binding protein, during KSHV lytic infection. ORF57 interacts with Ago2 and GW182, two major components of PB, and prevents the scaffolding activity of GW182 at the initial stage of PB formation in the infected cells. ORF57 also interacts with protein kinase R (PKR) and PKR-activating protein (PACT) to block PKR dimerization and kinase activation, and thus inhibits eIF2α phosphorylation and SG formation. The homologous immediate-early regulatory protein ICP27 of herpes simplex virus type 1 (HSV-1), but not the EB2 protein of Epstein-Barr virus (EBV), shares this conserved inhibitory function with KSHV ORF57 on PB and SG. Through KSHV ORF57 studies, we have learned much about how a DNA virus in the infected cells is equipped to evade host antiviral immunity for its replication and productive infection. KSHV ORF57 would be an excellent viral target for development of anti-KSHV-specific therapy.
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Affiliation(s)
- Nishi R Sharma
- Department of Molecular Medicine, School of Interdisciplinary Studies, Jamia Hamdard University, New Delhi, India
| | - Zhi-Ming Zheng
- Tumor Virus RNA Biology Section, HIV Dynamics and Replication Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, United States
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11
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Abstract
Zinc is well-known to have a central role in human inflammation and immunity and is itself an anti-inflammatory and antiviral agent. Despite its massively documented role in such processes, the underlying chemistry of zinc in relation to specific proteins and pathways of the immune system has not received much focus. This short review provides an overview of this topic, with emphasis on the structures of key proteins, zinc coordination chemistry, and probable mechanisms involved in zinc-based immunity, with some focus points for future chemical and biological research.
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Affiliation(s)
- Kasper Planeta Kepp
- DTU Chemistry, Technical University of Denmark, Building 206, 2800, Kongens Lyngby, Denmark
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12
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Abstract
Coronavirus disease 2019 (COVID-19), which has high incidence rates with rapid rate of transmission, is a pandemic that spread across the world, resulting in more than 3,000,000 deaths globally. Currently, several drugs have been used for the clinical treatment of COVID-19, such as antivirals (radecivir, baritinib), monoclonal antibodies (tocilizumab), and glucocorticoids (dexamethasone). Accumulating evidence indicates that long noncoding RNAs (lncRNAs) are essential regulators of virus infections and antiviral immune responses including biological processes that are involved in the regulation of COVID-19 and subsequent disease states. Upon viral infections, cellular lncRNAs directly regulate viral genes and influence viral replication and pathology through virus-mediated changes in the host transcriptome. Additionally, several host lncRNAs could help the occurrence of viral immune escape by inhibiting type I interferons (IFN-1), while others could up-regulate IFN-1 production to play an antiviral role. Consequently, understanding the expression and function of lncRNAs during severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection will provide insights into the development of lncRNA-based methods. In this review, we summarized the current findings of lncRNAs in the regulation of the strong inflammatory response, immune dysfunction and thrombosis induced by SARS-CoV-2 infection, discussed the underlying mechanisms, and highlighted the therapeutic challenges of COVID-19 treatment and its future research directions.
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Affiliation(s)
- Qinzhi Yang
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Fang Lin
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Yanan Wang
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Min Zeng
- Department of Pharmacy, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Mao Luo
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
- Department of Pharmacy, The Affiliated Hospital of Southwest Medical University, Luzhou, China
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13
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Palacios-Pedrero MÁ, Osterhaus ADME, Becker T, Elbahesh H, Rimmelzwaan GF, Saletti G. Aging and Options to Halt Declining Immunity to Virus Infections. Front Immunol 2021; 12:681449. [PMID: 34054872 PMCID: PMC8149791 DOI: 10.3389/fimmu.2021.681449] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 04/26/2021] [Indexed: 12/15/2022] Open
Abstract
Immunosenescence is a process associated with aging that leads to dysregulation of cells of innate and adaptive immunity, which may become dysfunctional. Consequently, older adults show increased severity of viral and bacterial infections and impaired responses to vaccinations. A better understanding of the process of immunosenescence will aid the development of novel strategies to boost the immune system in older adults. In this review, we focus on major alterations of the immune system triggered by aging, and address the effect of chronic viral infections, effectiveness of vaccination of older adults and strategies to improve immune function in this vulnerable age group.
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Affiliation(s)
| | - Albert D M E Osterhaus
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Tanja Becker
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Husni Elbahesh
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Guus F Rimmelzwaan
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Giulietta Saletti
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Hannover, Germany
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14
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Abstract
Coronavirus disease 2019 (COVID-19) has caused a global pandemic associated with substantial morbidity and mortality. Nasopharyngeal swabs and sputum samples are generally collected for serial viral load screening of respiratory contagions, but temporal profiles of these samples are not completely clear in patients with COVID-19. We performed an observational cohort study at Renmin Hospital of Wuhan University, which involved 31 patients with confirmed COVID-19 with or without underlying diseases. We obtained samples from each patient, and serial viral load was measured by real-time quantitative polymerase chain reaction. We found that the viral load in the sputum was inclined to be higher than samples obtained from the nasopharyngeal swab at disease presentation. Moreover, the viral load in the sputum decreased more slowly over time than in the nasopharyngeal group as the disease progressed. Interestingly, even when samples in the nasopharyngeal swab turned negative, it was commonly observed that patients with underlying diseases, especially hypertension and diabetes, remained positive for COVID-19 and required a longer period for the sputum samples to turn negative. These combined findings emphasize the importance of tracking sputum samples even in patients with negative tests from nasopharyngeal swabs, especially for those with underlying conditions. In conclusion, this work reinforces the importance of sputum samples for SARS-CoV-2 detection to minimize transmission of COVID-19 within the community.
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Affiliation(s)
- R Liu
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - S Yi
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - J Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Z Lv
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - C Zhu
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China.,State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan, China
| | - Y Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
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15
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Cuypers M, Schalk BWM, Koks‐Leensen MCJ, Nägele ME, Bakker‐van Gijssel EJ, Naaldenberg J, Leusink GL. Mortality of people with intellectual disabilities during the 2017/2018 influenza epidemic in the Netherlands: potential implications for the COVID-19 pandemic. J Intellect Disabil Res 2020; 64:482-488. [PMID: 32458565 PMCID: PMC7283786 DOI: 10.1111/jir.12739] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 04/30/2020] [Accepted: 05/01/2020] [Indexed: 05/28/2023]
Abstract
BACKGROUND Data on the development of Covid-19 among people with intellectual disabilities (IDs) are scarce and it is uncertain to what extent general population data applies to people with ID. To give an indication of possible implications, this study investigated excess mortality patterns during a previous influenza epidemic. METHODS Using Dutch population and mortality registers, a historical cohort study was designed to compare mortality during the 2017-2018 influenza epidemic with mortality in the same period in the three previous years. People with ID were identified by entitlements to residential ID-care services as retrieved from a national database. RESULTS Data covered the entire adult Dutch population (12.6 million; GenPop), of which 91 064 individuals were identified with an ID. During the influenza epidemic, mortality among people with ID increased almost three times as much than in the GenPop (15.2% vs. 5.4%), and more among male individuals with ID (+19.5%) than among female individuals with ID (+10.6%), as compared with baseline. In both cohorts, comparable increases in mortality within older age groups and due to respiratory causes were seen. Particularly in the ID-cohort, excess deaths also occurred in younger age groups, due to endocrine diseases and ID-specific causes. CONCLUSIONS During the 2017-2018 influenza epidemic, excess mortality among people with ID was three times higher than in the general Dutch population, appeared more often at young age and with a broader range of underlying causes. These findings suggest that a pandemic may disproportionally affect people with ID while population data may not immediately raise warnings. Early detection of diverging patterns and faster implementation of tailored strategies therefore require collection of good quality data.
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Affiliation(s)
- M. Cuypers
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - B. W. M. Schalk
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - M. C. J. Koks‐Leensen
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - M. E. Nägele
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - E. J. Bakker‐van Gijssel
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - J. Naaldenberg
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
| | - G. L. Leusink
- Radboud Institute for Health Sciences, Department of Primary and Community CareRadboud University Medical CenterNijmegenThe Netherlands
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16
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Affiliation(s)
- L Pascolo
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - L Zupin
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - M Melato
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - P M Tricarico
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - S Crovella
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy.,Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
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17
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Su HC, Jing H, Angelus P, Freeman AF. Insights into immunity from clinical and basic science studies of DOCK8 immunodeficiency syndrome. Immunol Rev 2019; 287:9-19. [PMID: 30565250 DOI: 10.1111/imr.12723] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 10/15/2018] [Indexed: 12/29/2022]
Abstract
DOCK8 immunodeficiency syndrome (DIDS) is a progressive combined immunodeficiency that can be distinguished from other combined immunodeficiencies or hyperimmunoglobulinemia E syndromes in featuring (a) profound susceptibility to virus infections of the skin, with associated skin cancers, and (b) severe food allergies. The DOCK8 locus has many repetitive sequence elements that predispose to the generation of large germline deletions as well as recombination-mediated somatic DNA repair. Residual DOCK8 protein contributes to the variable disease phenotype. The severe virus infections of the skin, and probably also VZV-associated vasculopathy, reflect an important function of DOCK8, which is normally required to maintain lymphocyte shape integrity as the cells migrate through dense tissues. Loss of DOCK8 also causes immune deficits through other mechanisms including a milder generalized cell survival defect and skewing of T helper cell subsets. Recent work has uncovered the roles for DOCK8 in dendritic cell responses that can also help explain the virus susceptibility, as well as in regulatory T cells that might help explain autoimmunity in a minority of patients. Fortunately, hematopoietic stem cell transplantation cures the eczema and infection susceptibility of DIDS, but not necessarily the other disease manifestations including food allergies.
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Affiliation(s)
- Helen C Su
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Huie Jing
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Pam Angelus
- Clinical Monitoring Research Program Directorate, Frederick National Laboratory for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland
| | - Alexandra F Freeman
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
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18
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Chang YJ, Zhao XY, Huang XJ. Granulocyte Colony-Stimulating Factor-Primed Unmanipulated Haploidentical Blood and Marrow Transplantation. Front Immunol 2019; 10:2516. [PMID: 31749802 PMCID: PMC6842971 DOI: 10.3389/fimmu.2019.02516] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 10/09/2019] [Indexed: 12/25/2022] Open
Abstract
Granulocyte colony-stimulating factor (G-CSF), a growth factor for neutrophils, has been successfully used for stem cell mobilization and T cell immune tolerance induction. The establishment of G-CSF-primed unmanipulated haploidentical blood and marrow transplantation (The Beijing Protocol) has achieved outcomes for the treatment of acute leukemia, myelodysplastic syndrome, and severe aplastic anemia with haploidentical allografts comparable to those of human leukocyte antigen (HLA)-matched sibling donor transplantation. Currently, G-CSF-mobilized bone marrow and/or peripheral blood stem cell sources have been widely used in unmanipulated haploidentical transplant settings. In this review, we summarize the roles of G-CSF in inducing T cell immune tolerance. We discuss the recent advances in the Beijing Protocol, mainly focusing on strategies that have been used to improve transplant outcomes in cases of poor graft function, virus infections, and relapse. The application of G-CSF-primed allografts in other haploidentical modalities is also discussed.
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Affiliation(s)
- Ying-Jun Chang
- Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, National Clinical Research Center for Hematologic Disease, Peking University Institute of Hematology, Peking University People's Hospital, Beijing, China
| | - Xiang-Yu Zhao
- Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, National Clinical Research Center for Hematologic Disease, Peking University Institute of Hematology, Peking University People's Hospital, Beijing, China
| | - Xiao-Jun Huang
- Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, National Clinical Research Center for Hematologic Disease, Peking University Institute of Hematology, Peking University People's Hospital, Beijing, China.,Peking-Tsinghua Center for Life Sciences, Beijing, China
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19
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Tian J, Wei YX. [Advances in etiology and pathogenic mechanisms of postviral olfactory dysfunction]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:477-480. [PMID: 31163565 DOI: 10.13201/j.issn.1001-1781.2019.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Indexed: 11/12/2022]
Abstract
Postviral olfactory disorders(PVOD) are one of the most commonly identified causes of olfactory dysfunction. However, its causative agent has yet been identified even though techniques of virus detection have been improved rapidly. It has been reported that some kinds of viruses are able to infect the olfactory neurons directly and result in the infection of central nervous system via olfactory pathway, which suggest the complexity of the pathogenic mechanism of PVOD. In the article, we review the advance in virus identification and pathogenesis of PVOD, which might be helpful to the diagnosis and treatment.
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20
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Soudani N, Caniza MA, Assaf-Casals A, Shaker R, Lteif M, Su Y, Tang L, Akel I, Muwakkit S, Chmaisse A, Homsi M, Dbaibo G, Zaraket H. Prevalence and characteristics of acute respiratory virus infections in pediatric cancer patients. J Med Virol 2019; 91:1191-1201. [PMID: 30763464 PMCID: PMC7166696 DOI: 10.1002/jmv.25432] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/30/2019] [Accepted: 02/12/2019] [Indexed: 01/09/2023]
Abstract
Background Patients with pediatric cancer have a higher risk of morbidity and mortality because of respiratory viral infections than other patient populations. Objectives To investigate the causative viruses of respiratory infections and their burden among patients with pediatric cancer in Lebanon. Study design Nasopharyngeal swabs along with clinical and demographic data were collected from patients with pediatric cancer presenting febrile episodes with upper respiratory tract symptoms. Total nucleic acid was extracted from specimens followed by the real‐time PCR analysis targeting 14 respiratory viruses to estimate the frequency of infections. Results We obtained 89 nasopharyngeal swabs from patients with pediatric cancer (mean age, 5.8 ± 4.2 years). Real‐time PCR confirmed viral infection in 77 swabs (86.5%). Among these, 151 respiratory viruses were detected. Several viruses cocirculated within the same period; respiratory syncytial virus (RSV) being the most common (45.45%), followed by parainfluenza virus (PIV; 26%), influenza type B (26%), human metapneumovirus (24.6%), and human coronavirus (HCoV; 24.6%). Coinfections were detected in 55% of the subjects, and most of them involved RSV with one or more other viruses. A strong correlation was found between PIV, Flu (influenza of any type), RSV, and HCoV with the incidence of coinfections. RSV was associated with lower respiratory tract infections, nasal congestion, bronchitis, and bacteremia. HCoV was associated with bronchiolitis; rhinovirus was associated with hospital admission. Conclusion Patients with pediatric cancer have a high burden of respiratory viral infections and a high incidence of coinfections. Molecular diagnostics can improve management of febrile episodes and reduce antibiotic use. Respiratory viruses are leading cause of ARTI in pediatric cancer patients. Coinfections are common among febrile pediatric cancer patients. RSV was the most common in mono‐ and coinfections among pediatric cancer patients. RSV, PIV, Flu, HCoV are associated with coinfections. Molecular diagnostics permit rapid and sensitive diagnostics and limit antibiotic abuse.
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Affiliation(s)
- Nadia Soudani
- Department of Experimental Pathology, Immunology and Microbiology, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Biology, Faculty of Sciences, EDST, Lebanese University, Lebanon
| | - Miguela A Caniza
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, Tennessee.,Department of Global Pediatric Medicine, St Jude Children's Research Hospital, Memphis, Tennessee
| | - Aia Assaf-Casals
- Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Rouba Shaker
- Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Mireille Lteif
- Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Yin Su
- Department of Biostatistics, St Jude Children's Research Hospital, Memphis, Tennessee
| | - Li Tang
- Department of Biostatistics, St Jude Children's Research Hospital, Memphis, Tennessee
| | - Imad Akel
- Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Samar Muwakkit
- Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Children's Cancer Center of Lebanon, American University of Beirut, Beirut, Lebanon
| | - Ahmad Chmaisse
- Department of Experimental Pathology, Immunology and Microbiology, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Maysam Homsi
- Department of Global Pediatric Medicine, St Jude Children's Research Hospital, Memphis, Tennessee
| | - Ghassan Dbaibo
- Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Department of Pediatrics and Adolescent Medicine, American University of Beirut Faculty of Medicine, Beirut, Lebanon
| | - Hassan Zaraket
- Department of Experimental Pathology, Immunology and Microbiology, American University of Beirut Faculty of Medicine, Beirut, Lebanon.,Center for Infectious Diseases Research, American University of Beirut Faculty of Medicine, Beirut, Lebanon
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21
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Abstract
This chapter is the first one to introduce the detection of viral RNA splicing as a new tool for clinical diagnosis of virus infections. These include various infections caused by influenza viruses, human immunodeficiency viruses (HIV), human T-cell leukemia viruses (HTLV), Torque teno viruses (TTV), parvoviruses, adenoviruses, hepatitis B virus, polyomaviruses, herpesviruses, and papillomaviruses. Detection of viral RNA splicing for active viral gene expression in a clinical sample is a nucleic acid-based detection. The interpretation of the detected viral RNA splicing results is straightforward without concern for carry-over DNA contamination, because the spliced RNA is smaller than its corresponding DNA template. Although many methods can be used, a simple method to detect viral RNA splicing is reverse transcription-polymerase chain reaction (RT-PCR). In principle, the detection of spliced RNA transcripts by RT-PCR depends on amplicon selection and primer design. The most common approach is the amplification over the intron regions by a set of primers in flanking exons. A larger product than the predicted size of smaller, spliced RNA is in general an unspliced RNA or contaminating viral genomic DNA. A spliced mRNA always gives a smaller RT-PCR product than its unspliced RNA due to removal of intron sequences by RNA splicing. The contaminating viral DNA can be determined by a minus RT amplification (PCR). Alternatively, specific amplification of a spliced RNA can be obtained by using an exon-exon junction primer because the sequence at exon-exon junction is not present in the unspliced RNA nor in viral genomic DNA.
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22
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Hellesen A, Bratland E. The potential role for infections in the pathogenesis of autoimmune Addison's disease. Clin Exp Immunol 2018; 195:52-63. [PMID: 30144040 DOI: 10.1111/cei.13207] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/02/2018] [Accepted: 08/10/2018] [Indexed: 12/21/2022] Open
Abstract
Autoimmune Addison's disease (AAD), or primary adrenocortical insufficiency, is a classical organ-specific autoimmune disease with 160 years of history. AAD is remarkably homogeneous with one major dominant self-antigen, the cytochrome P450 21-hydroxylase enzyme, which is targeted by both autoantibodies and autoreactive T cells. Like most autoimmune diseases, AAD is thought to be caused by an unfortunate combination of genetic and environmental factors. While the number of genetic associations with AAD is increasing, almost nothing is known about environmental factors. A major environmental factor commonly proposed for autoimmune diseases, based partly on experimental and clinical data and partly on shared pathways between anti-viral immunity and autoimmunity, is viral infections. However, there are few reports associating viral infections to AAD, and it has proved difficult to establish which immunological processes that could link any viral infection with the initiation or progression of AAD. In this review, we will summarize the current knowledge on the underlying mechanisms of AAD and take a closer look on the potential involvement of viruses.
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Affiliation(s)
- A Hellesen
- Department of Clinical Science, University of Bergen, Bergen, Norway.,K.G. Jebsen Senter for Autoimmune Sykdommer, University of Bergen, Bergen, Norway
| | - E Bratland
- Department of Clinical Science, University of Bergen, Bergen, Norway.,K.G. Jebsen Senter for Autoimmune Sykdommer, University of Bergen, Bergen, Norway
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23
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Hirche C, Frenz T, Haas SF, Döring M, Borst K, Tegtmeyer PK, Brizic I, Jordan S, Keyser K, Chhatbar C, Pronk E, Lin S, Messerle M, Jonjic S, Falk CS, Trumpp A, Essers MAG, Kalinke U. Systemic Virus Infections Differentially Modulate Cell Cycle State and Functionality of Long-Term Hematopoietic Stem Cells In Vivo. Cell Rep 2018; 19:2345-2356. [PMID: 28614719 DOI: 10.1016/j.celrep.2017.05.063] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 04/25/2017] [Accepted: 05/18/2017] [Indexed: 02/08/2023] Open
Abstract
Quiescent long-term hematopoietic stem cells (LT-HSCs) are efficiently activated by type I interferon (IFN-I). However, this effect remains poorly investigated in the context of IFN-I-inducing virus infections. Here we report that both vesicular stomatitis virus (VSV) and murine cytomegalovirus (MCMV) infection induce LT-HSC activation that substantially differs from the effects triggered upon injection of synthetic IFN-I-inducing agents. In both infections, inflammatory responses had to exceed local thresholds within the bone marrow to confer LT-HSC cell cycle entry, and IFN-I receptor triggering was not critical for this activation. After resolution of acute MCMV infection, LT-HSCs returned to phenotypic quiescence. However, non-acute MCMV infection induced a sustained inflammatory milieu within the bone marrow that was associated with long-lasting impairment of LT-HSC function. In conclusion, our results show that systemic virus infections fundamentally affect LT-HSCs and that also non-acute inflammatory stimuli in bone marrow donors can affect the reconstitution potential of bone marrow transplants.
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Affiliation(s)
- Christoph Hirche
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Theresa Frenz
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Simon F Haas
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; "Hematopoietic Stem Cells and Stress" Group, German Cancer Research Centre (DKFZ), 69121 Heidelberg, Germany
| | - Marius Döring
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Katharina Borst
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Pia-K Tegtmeyer
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Ilija Brizic
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Stefan Jordan
- Icahn School of Medicine at Mount Sinai, Department of Oncological Sciences, New York, NY 10029, USA
| | - Kirsten Keyser
- Department of Virology, Hannover Medical School, 30625 Hannover, Germany
| | - Chintan Chhatbar
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany
| | - Eline Pronk
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; "Hematopoietic Stem Cells and Stress" Group, German Cancer Research Centre (DKFZ), 69121 Heidelberg, Germany
| | - Shuiping Lin
- Molecular Medicine Division, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia
| | - Martin Messerle
- Department of Virology, Hannover Medical School, 30625 Hannover, Germany
| | - Stipan Jonjic
- Department of Histology and Embryology, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia
| | - Christine S Falk
- Institute of Transplant Immunology, IFB-Tx, Hannover Medical School, 30625 Hannover, Germany
| | - Andreas Trumpp
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; Division of Stem Cells and Cancer, German Cancer Research Centre (DKFZ), 69120 Heidelberg, Germany
| | - Marieke A G Essers
- Heidelberg Institute for Stem Cell Technology and Experimental Medicine (HI-STEM gGmbH), 69120 Heidelberg, Germany; "Hematopoietic Stem Cells and Stress" Group, German Cancer Research Centre (DKFZ), 69121 Heidelberg, Germany
| | - Ulrich Kalinke
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School and the Helmholtz Centre for Infection Research, 30625 Hannover, Germany.
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24
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Abstract
Pathogenesis encompasses all the sequence of events accompanying acute and persistent infections. It includes entry of the virus into the body, multiplication and spread, the development of tissue damage, and the production of an immune response; the latter may contribute to the pathology of an infection. It includes the appearance of clinical signs and symptoms, the eventual resolution of the infection and, in most cases, virus elimination. Understanding viral disease pathogenesis requires knowledge of each of the stages of infection and an awareness of the underlying mechanisms. There may be variation from individual to individual in the severity and/or the duration of these events, but a sound working knowledge of a typical sequence associated with each infection is crucial in both making an accurate diagnosis and recommending the appropriate treatment.
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25
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Abstract
Environmental factors play an important role in the pathogenesis of type 1 diabetes and can determine if a genetically susceptible individual develops the disease. Increasing evidence suggest that among other exogenous agents certain virus infections can contribute to the beta-cell damaging process. Possible viral etiology of type 1 diabetes has been explored extensively but the final proof for causality is still lacking. Currently, the group of enteroviruses (EVs) is considered as the strongest candidate. These viruses have been found in the pancreas of type 1 diabetic patients, and epidemiological studies have shown more EV infections in diabetic patients than in controls. Prospective studies, such as the Type 1 Diabetes Prediction and Prevention (DIPP) study in Finland, are of fundamental importance in the evaluation viral effects as they can cover all stages of the beta-cell damaging process, including those preceding the initiation of the process. DIPP study has carried out the most comprehensive virological analyses ever done in prospective cohorts. This article summarizes the findings from these analyses and discuss them in the context of the existing other knowledge and the prospects for intervention studies with EV vaccines or antiviral drugs.
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Affiliation(s)
- Heikki Hyöty
- Department of Virology, School of Medicine, University of Tampere, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
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Nuruzzaman M, Sharoni AM, Satoh K, Karim MR, Harikrishna JA, Shimizu T, Sasaya T, Omura T, Haque MA, Hasan SMZ, Ahmad A, Kikuchi S. NAC transcription factor family genes are differentially expressed in rice during infections with Rice dwarf virus, Rice black-streaked dwarf virus, Rice grassy stunt virus, Rice ragged stunt virus, and Rice transitory yellowing virus. Front Plant Sci 2015; 6:676. [PMID: 26442000 PMCID: PMC4563162 DOI: 10.3389/fpls.2015.00676] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 08/15/2015] [Indexed: 05/17/2023]
Abstract
Expression levels of the NAC gene family were studied in rice infected with Rice dwarf virus (RDV), Rice black-streaked dwarf virus (RBSDV), Rice grassy stunt virus (RGSV), Rice ragged stunt virus (RRSV), and Rice transitory yellowing virus (RTYV). Microarray analysis showed that 75 (68%) OsNAC genes were differentially regulated during infection with RDV, RBSDV, RGSV, and RRSV compared with the control. The number of OsNAC genes up-regulated was highest during RGSV infection, while the lowest number was found during RTYV infection. These phenomena correlate with the severity of the syndromes induced by the virus infections. Most of the genes in the NAC subgroups NAC22, SND, ONAC2, ANAC34, and ONAC3 were down-regulated for all virus infections. These OsNAC genes might be related to the health stage maintenance of the host plants. Interestingly, most of the genes in the subgroups TIP and SNAC were more highly expressed during RBSDV and RGSV infections. These results suggested that OsNAC genes might be related to the responses induced by the virus infection. All of the genes assigned to the TIP subgroups were highly expressed during RGSV infection when compared with the control. For RDV infection, the number of activated genes was greatest during infection with the S-strain, followed by the D84-strain and the O-strain, with seven OsNAC genes up-regulated during infection by all three strains. The Os12g03050 and Os11g05614 genes showed higher expression during infection with four of the five viruses, and Os11g03310, Os11g03370, and Os07g37920 genes showed high expression during at least three viral infections. We identified some duplicate genes that are classified as neofunctional and subfunctional according to their expression levels in different viral infections. A number of putative cis-elements were identified, which may help to clarify the function of these key genes in network pathways.
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Affiliation(s)
- Mohammed Nuruzzaman
- Plant Genome Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
- Faculty of Science, Centre for Research for Biotechnology for Agriculture, Institute of Biological Sciences, University of MalayaKuala Lumpur, Malaysia
- Post Harvest Technology, School of Food Science and Technology, University Malaysia TerengganuKuala Terengganu, Malaysia
- Department of Agronomy and Agricultural Extension, Faculty of Agriculture, University of RajshahiRajshahi, Bangladesh
| | - Akhter M. Sharoni
- Plant Genome Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
| | - Kouji Satoh
- Plant Genome Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
- Research Team for Vector-Borne Plant Pathogens, National Agricultural Research CenterTsukuba, Japan
| | - Mohammad Rezaul Karim
- Faculty of Science, Centre for Research for Biotechnology for Agriculture, Institute of Biological Sciences, University of MalayaKuala Lumpur, Malaysia
| | - Jennifer A. Harikrishna
- Faculty of Science, Centre for Research for Biotechnology for Agriculture, Institute of Biological Sciences, University of MalayaKuala Lumpur, Malaysia
| | - Takumi Shimizu
- Research Team for Vector-Borne Plant Pathogens, National Agricultural Research CenterTsukuba, Japan
| | - Takahide Sasaya
- Research Team for Vector-Borne Plant Pathogens, National Agricultural Research CenterTsukuba, Japan
| | - Toshihiro Omura
- Research Team for Vector-Borne Plant Pathogens, National Agricultural Research CenterTsukuba, Japan
| | - Mohammad A. Haque
- Department of Agronomy and Agricultural Extension, Faculty of Agriculture, University of RajshahiRajshahi, Bangladesh
| | - Sayed M. Z. Hasan
- Post Harvest Technology, School of Food Science and Technology, University Malaysia TerengganuKuala Terengganu, Malaysia
| | - Aziz Ahmad
- Centre for Fundamental and Liberal Education, School of Science and Food Technology, Universiti Malaysia TerengganuKuala Terengganu, Malaysia
| | - Shoshi Kikuchi
- Plant Genome Research Unit, Agrogenomics Research Center, National Institute of Agrobiological SciencesTsukuba, Japan
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Rashid H, Shafi S, Haworth E, El Bashir H, Memish ZA, Sudhanva M, Smith M, Auburn H, Booy R. Viral respiratory infections at the Hajj: comparison between UK and Saudi pilgrims. Clin Microbiol Infect 2008; 14:569-74. [PMID: 18373688 PMCID: PMC7129001 DOI: 10.1111/j.1469-0691.2008.01987.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A high incidence of respiratory infection, including influenza, has been reported at the Hajj in Mecca, Saudi Arabia. Reported rates of influenza have been higher among UK than among domestic pilgrims, but this could be explained by methodological differences among studies. Accordingly, the present study compared the frequencies of respiratory viruses among UK and Saudi pilgrims using the same study design. Pilgrims with upper respiratory tract symptoms were recruited from Mecca and the neighbouring valley Mina during the Hajj 2006. Nasal swabs were used for point-of-care influenza testing and real-time RT-PCR (rtRT-PCR) tests for influenza virus, rhinovirus, parainfluenza virus, adenovirus, human metapneumovirus and respiratory syncytial virus. Of 260 pilgrims investigated, 150 were from the UK and 110 were Saudi; of these, 38 (25%) UK pilgrims and 14 (13%) Saudi pilgrims had respiratory infections detectable by rtRT-PCR (p 0.01). In the UK group, there were 19 (13%) cases of rhinovirus infection, 15 (10%) cases of influenza virus infection, two (1%) cases of dual infections with influenza virus and rhinovirus, one (3%) case of parainfluenza virus infection, and one (1%) case of respiratory syncytial virus infection. Fifty-six (37%) UK pilgrims had been vaccinated against influenza virus, with the rates of influenza in the vaccinated and unvaccinated group being 7% and 14%, respectively (p 0.19). In the Saudi group, there were three (3%) cases of rhinovirus infection and 11 (10%) cases of influenza. Only four (4%) Saudi pilgrims had been vaccinated against influenza virus, and none of these was infected with influenza virus. Overall, a significantly higher proportion of the UK pilgrims had detectable respiratory infections (25% vs. 13%, p 0.01). Influenza rates were similar in both groups, but the reported rates of influenza vaccination differed.
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Affiliation(s)
- H. Rashid
- Academic Unit of Child Health, Barts and the London Queen Mary’s School of Medicine and Dentistry
| | - S. Shafi
- Clinical Microbiology & HPA Collaborating Laboratory, North West London Hospitals NHS Trust
| | - E. Haworth
- Health Protection Agency South East, London, UK
| | - H. El Bashir
- Academic Unit of Child Health, Barts and the London Queen Mary’s School of Medicine and Dentistry
| | - Z. A. Memish
- Departments of Medicine, Infection Prevention and Control, King Abdulaziz Medical City, National Guard Health Affairs, Riyadh, Saudi Arabia
| | - M. Sudhanva
- South London Specialist Virology Centre, Health Protection Agency London Regional Laboratory, Kings College NHS Foundation Trust, London, UK
| | - M. Smith
- South London Specialist Virology Centre, Health Protection Agency London Regional Laboratory, Kings College NHS Foundation Trust, London, UK
| | - H. Auburn
- South London Specialist Virology Centre, Health Protection Agency London Regional Laboratory, Kings College NHS Foundation Trust, London, UK
| | - R. Booy
- Academic Unit of Child Health, Barts and the London Queen Mary’s School of Medicine and Dentistry
- National Centre for Immunisation Research and Surveillance of Vaccine Preventable Diseases, The Children’s Hospital at Westmead and The University of Sydney, New South Wales, Australia
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Abstract
The respiratory tract is a frequent site of infection with a wide range of viruses. Each family of viruses can cause differing clinical syndromes depending on the age of the patient and the immune response. As a corollary, different clinical syndromes can be caused by different families of viruses.
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Affiliation(s)
- Alison M Kesson
- Department of Infectious Diseases and Microbiology, The Children's Hospital at Westmead, Discipline of Paediatrics and Child Health, University of Sydney, LMB 4001, Westmead NSW 2145, Australia.
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Nokso-Koivisto J, Hovi T, Pitkäranta A. Viral upper respiratory tract infections in young children with emphasis on acute otitis media. Int J Pediatr Otorhinolaryngol 2006; 70:1333-42. [PMID: 16564578 PMCID: PMC7112939 DOI: 10.1016/j.ijporl.2006.01.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Revised: 01/29/2006] [Accepted: 01/30/2006] [Indexed: 11/24/2022]
Abstract
Viral upper respiratory infection is the most common reason for seeking medical care for children. Recurrent viral respiratory infections and subsequent complications (e.g. acute otitis media (AOM)) are a burden for children, their families and society. Over the past decade, our knowledge on the significance of respiratory viruses has broadened remarkably. Viruses cause large variety of respiratory diseases and cause alone diseases, which previously have been assumed to be bacterial only (e.g. AOM and pneumonia). Methods for detection analysis of respiratory viruses are developing making both the diagnosis and epidemiological investigations of respiratory infections easier. Accurate diagnosis of respiratory infections and awareness of possible viral etiology could reduce the use of antibiotics. Etiologic studies of viral infections are becoming increasingly important, with the emergence of new antiviral drugs and vaccines.
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Affiliation(s)
- Johanna Nokso-Koivisto
- Department of Virology and Immunology, National Public Health Institute, Mannerheimintie 166, 00300 Helsinki, Finland.
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