1
|
Torinsson Naluai Å, Östensson M, Fowler PC, Abrahamsson S, Andersson B, Lassesson S, Jacobsson F, Oscarsson M, Bohman A, Harandi AM, Bende M. Transcriptomics unravels molecular changes associated with cilia and COVID-19 in chronic rhinosinusitis with nasal polyps. Sci Rep 2023; 13:6592. [PMID: 37085563 PMCID: PMC10121071 DOI: 10.1038/s41598-023-32944-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 04/05/2023] [Indexed: 04/23/2023] Open
Abstract
Chronic rhinosinusitis with nasal polyps (CRSwNP) is a common upper respiratory tract complication where the pathogenesis is largely unknown. Herein, we investigated the transcriptome profile in nasal mucosa biopsies of CRSwNP patients and healthy individuals. We further integrated the transcriptomics data with genes located in chromosomal regions containing genome-wide significant gene variants for COVID-19. Among the most significantly upregulated genes in polyp mucosa were CCL18, CLEC4G, CCL13 and SLC9A3. Pathways involving "Ciliated epithelial cells" were the most differentially expressed molecular pathways when polyp mucosa and non-polyp mucosa from the same patient was compared. Natural killer T-cell (NKT) and viral pathways were the most statistically significant pathways in the mucosa of CRSwNP patients compared with those of healthy control individuals. Upregulated genes in polyp mucosa, located within the genome-wide associated regions of COVID-19, included LZTFL1, CCR9, SLC6A20, IFNAR1, IFNAR2 and IL10RB. Interestingly, the second most over-expressed gene in our study, CLEC4G, has been shown to bind directly to SARS-CoV-2 spike's N-terminal domain and mediate its entry and infection. Our results on altered expression of genes related to cilia and viruses point to the de-regulation of viral defenses in CRSwNP patients, and may give clues to future intervention strategies.
Collapse
Affiliation(s)
- Åsa Torinsson Naluai
- Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
| | - Malin Östensson
- Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Philippa C Fowler
- Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Sanna Abrahamsson
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Björn Andersson
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Stina Lassesson
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Frida Jacobsson
- Core Facilities, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Martin Oscarsson
- Department of Otorhinolaryngology, Skaraborg Hospital, Skövde, Sweden
| | - Anton Bohman
- Department of Otorhinolaryngology, Uppsala University Hospital, Uppsala, Sweden
| | - Ali M Harandi
- Department of Microbiology and Immunology, Institute of Biomedicine, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
| | - Mats Bende
- Department of Otorhinolaryngology, Skaraborg Hospital, Skövde, Sweden
| |
Collapse
|
2
|
Arora S, Rana M, Sachdev A, D’Souza JS. Appearing and disappearing acts of cilia. J Biosci 2023. [DOI: 10.1007/s12038-023-00326-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
|
3
|
Laue M, Hoffmann T, Michel J, Nitsche A. Visualization of SARS-CoV-2 particles in naso/oropharyngeal swabs by thin section electron microscopy. Virol J 2023; 20:21. [PMID: 36747188 PMCID: PMC9901382 DOI: 10.1186/s12985-023-01981-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND SARS-CoV-2 replicates efficiently in the upper airways of humans and produces high loads of virus RNA and, at least in the initial phase after infection, many infectious virus particles. Studying virus ultrastructure, such as particle integrity or presence of spike proteins, and effects on their host cells in patient samples is important to understand the pathogenicity of SARS-CoV-2. METHODS Suspensions from swab samples with a high load of virus RNA (Ct < 20) were sedimented by desktop ultracentrifugation and prepared for thin section electron microscopy using a novel method which is described in detail. Embedding was performed in Epon or in LR White resin using standard or rapid protocols. Thin sections were examined using transmission electron microscopy. RESULTS Virus particles could be regularly detected in the extracellular space, embedded in a background of heterogenous material (e.g. vesicles and needle-like crystals), and within ciliated cells. Morphology (i.e. shape, size, spike density) of virus particles in the swab samples was very similar to particle morphology in cell culture. However, in some of the samples the virus particles hardly revealed spikes. Infected ciliated cells occasionally showed replication organelles, such as double-membrane vesicles. The most common cells in all samples were keratinocytes from the mucosa and bacteria. CONCLUSIONS The new method allows the ultrastructural visualization and analysis of coronavirus particles and of infected host cells from easy to collect naso/oropharyngeal patient swab samples.
Collapse
Affiliation(s)
- Michael Laue
- Advanced Light and Electron Microscopy, Center for Biological Threats and Special Pathogens (ZBS 4), Robert Koch Institute, Seestr. 10, 13353, Berlin, Germany.
| | - Tobias Hoffmann
- grid.13652.330000 0001 0940 3744Advanced Light and Electron Microscopy, Center for Biological Threats and Special Pathogens (ZBS 4), Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany
| | - Janine Michel
- grid.13652.330000 0001 0940 3744Highly Pathogenic Viruses, Center for Biological Threats and Special Pathogens (ZBS 1), Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany
| | - Andreas Nitsche
- grid.13652.330000 0001 0940 3744Highly Pathogenic Viruses, Center for Biological Threats and Special Pathogens (ZBS 1), Robert Koch Institute, Seestr. 10, 13353 Berlin, Germany
| |
Collapse
|
4
|
Arora S, Rana M, Sachdev A, D'Souza JS. Appearing and disappearing acts of cilia. J Biosci 2023; 48:8. [PMID: 36924208 PMCID: PMC10005925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
The past few decades have seen a rise in research on vertebrate cilia and ciliopathy, with interesting collaborations between basic and clinical scientists. This work includes studies on ciliary architecture, composition, evolution, and organelle generation and its biological role. The human body has cells that harbour any of the following four types of cilia: 9+0 motile, 9+0 immotile, 9+2 motile, and 9+2 immotile. Depending on the type, cilia play an important role in cell/fluid movement, mating, sensory perception, and development. Defects in cilia are associated with a wide range of human diseases afflicting the brain, heart, kidneys, respiratory tract, and reproductive system. These are commonly known as ciliopathies and affect millions of people worldwide. Due to their complex genetic etiology, diagnosis and therapy have remained elusive. Although model organisms like Chlamydomonas reinhardtii have been a useful source for ciliary research, reports of a fascinating and rewarding translation of this research into mammalian systems, especially humans, are seen. The current review peeks into one of the complex features of this organelle, namely its birth, the common denominators across the formation of both 9+0 and 9+2 ciliary types, the molecules involved in ciliogenesis, and the steps that go towards regulating their assembly and disassembly.
Collapse
Affiliation(s)
- Shashank Arora
- School of Biological Sciences, UM-DAE Centre for Excellence in Basic Sciences, Kalina Campus, Santacruz (E), Mumbai 400098, India
| | | | | | | |
Collapse
|
5
|
Ultrastructural analysis and three-dimensional reconstruction of cellular structures involved in SARS-CoV-2 spread. Histochem Cell Biol 2022; 159:47-60. [PMID: 36175690 PMCID: PMC9521873 DOI: 10.1007/s00418-022-02152-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2022] [Indexed: 02/07/2023]
Abstract
The cytoskeleton not only deals with numerous interaction and communication mechanisms at the cellular level but also has a crucial role in the viral infection cycle. Although numerous aspects of SARS-CoV-2 virus interaction at the cellular level have been widely studied, little has been reported about the structural and functional response of the cytoskeleton. This work aims to characterize, at the ultrastructural level, the modifications in the cytoskeleton of infected cells, namely, its participation in filopodia formation, the junction of these nanostructures forming bridges, the viral surfing, and the generation of tunnel effect nanotubes (TNT) as probable structures of intracellular viral dissemination. The three-dimensional reconstruction from the obtained micrographs allowed observing viral propagation events between cells in detail for the first time. More profound knowledge about these cell-cell interaction models in the viral spread mechanisms could lead to a better understanding of the clinical manifestations of COVID-19 disease and to find new therapeutic strategies.
Collapse
|
6
|
Faridl M, Mellyani K, Khoirunnisa K, Septiani P, Giri-Rachman EA, Nugrahapraja H, Rahmawati E, Alamanda CNC, Ristandi RB, Rachman RW, Robiani R, Fibriani A. RNA sequence analysis of nasopharyngeal swabs from asymptomatic and mildly symptomatic patients with COVID-19. Int J Infect Dis 2022; 122:449-460. [PMID: 35760384 PMCID: PMC9233886 DOI: 10.1016/j.ijid.2022.06.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 05/24/2022] [Accepted: 06/21/2022] [Indexed: 01/25/2023] Open
Abstract
OBJECTIVES The characterization of asymptomatic and mildly symptomatic patients with COVID-19 by observing changes in gene expression profile and possible bacterial coinfection is relevant to be investigated. We aimed to identify transcriptomic and coinfection profiles in both groups of patients. METHODS A ribonucleic acid (RNA) sequence analysis on nasopharyngeal swabs were performed using a shotgun sequencing pipeline. Differential gene analysis, viral genome assembly, and metagenomics analysis were further performed using the retrieved data. RESULTS Both groups of patients underwent a cilia modification and mRNA splicing. Modulations in macroautophagy, epigenetics, and cell cycle processes were observed specifically in the asymptomatic group. Modulation in the RNA transport was found specifically in the mildly symptomatic group. The mildly symptomatic group showed modulation in the RNA transport and upregulation of autophagy regulator genes and genes in the complement system. No link between viral variants and disease severity was found. Microbiome analysis revealed the elevation of Streptococcus pneumoniae and Veillonella parvula proportion in symptomatic patients. CONCLUSION A reduction in the autophagy influx and modification in the epigenetic profile might be involved in halting the disease progression. A global dysregulation of RNA processing and translation might cause more severe outcomes in symptomatic individuals. Coinfection by opportunistic microflora should be taken into account when assessing the possible outcome of SARS-CoV-2 infection.
Collapse
Affiliation(s)
- Miftahul Faridl
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| | - Karlina Mellyani
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| | - Karimatu Khoirunnisa
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| | - Popi Septiani
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| | | | - Husna Nugrahapraja
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| | - Ema Rahmawati
- West Java Health Laboratory, Bandung, West Java, Indonesia
| | | | | | | | - Rini Robiani
- West Java Health Laboratory, Bandung, West Java, Indonesia
| | - Azzania Fibriani
- School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia,Corresponding author at: School of Life Sciences and Technology, Bandung Institute of Technology, Bandung, West Java, Indonesia
| |
Collapse
|
7
|
Abstract
Cilium formation and regeneration requires new protein synthesis, but the underlying cytosolic translational reprogramming remains largely unknown. Using ribosome footprinting, we performed global translatome profiling during cilia regeneration in Chlamydomonas and uncovered that flagellar genes undergo an early transcriptional activation but late translational repression. This pattern guided our identification of sphingolipid metabolism enzymes, including serine palmitoyltransferase (SPT), as essential regulators for ciliogenesis. Cryo-electron tomography showed that ceramide loss abnormally increased the membrane-axoneme distance and generated bulged cilia. We found that ceramides interact with intraflagellar transport (IFT) particle proteins that IFT motors transport along axoneme microtubules (MTs), suggesting that ceramide-IFT particle-IFT motor-MT interactions connect the ciliary membrane with the axoneme to form rod-shaped cilia. SPT-deficient vertebrate cells were defective in ciliogenesis, and SPT mutations from patients with hereditary sensory neuropathy disrupted cilia, which could be restored by sphingolipid supplementation. These results reveal a conserved role of sphingolipid in cilium formation and link compromised sphingolipid production with ciliopathies.
Collapse
|
8
|
Vijaykumar K, Leung HM, Barrios A, Fernandez-Petty CM, Solomon GM, Hathorne HY, Wade JD, Monroe K, Slaten KB, Li Q, Leal SM, Moates DB, Pierce HM, Olson KR, Currier P, Foster S, Marsden D, Tearney GJ, Rowe SM. COVID-19 Causes Ciliary Dysfunction as Demonstrated by Human Intranasal Micro-Optical Coherence Tomography Imaging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2022:2022.07.08.499336. [PMID: 35860227 PMCID: PMC9298131 DOI: 10.1101/2022.07.08.499336] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Severe acute respiratory syndrome coronavirus (SARS-CoV-2), causative agent of coronavirus disease 2019 (COVID-19), binds via ACE2 receptors, highly expressed in ciliated cells of the nasal epithelium. Micro-optical coherence tomography (μOCT) is a minimally invasive intranasal imaging technique that can determine cellular and functional dynamics of respiratory epithelia at 1-μm resolution, enabling real time visualization and quantification of epithelial anatomy, ciliary motion, and mucus transport. We hypothesized that respiratory epithelial cell dysfunction in COVID-19 will manifest as reduced ciliated cell function and mucociliary abnormalities, features readily visualized by μOCT. Symptomatic outpatients with SARS-CoV-2 aged ≥ 18 years were recruited within 14 days of symptom onset. Data was interpreted for subjects with COVID-19 (n=13) in comparison to healthy controls (n=8). Significant reduction in functional cilia, diminished ciliary beat frequency, and abnormal ciliary activity were evident. Other abnormalities included denuded epithelium, presence of mucus rafts, and increased inflammatory cells. Our results indicate that subjects with mild but symptomatic COVID-19 exhibit functional abnormalities of the respiratory mucosa underscoring the importance of mucociliary health in viral illness and disease transmission. Ciliary imaging enables investigation of early pathogenic mechanisms of COVID-19 and may be useful for evaluating disease progression and therapeutic response. Graphical abstract
Collapse
|
9
|
SARS-CoV-2 Infection Dysregulates Cilia and Basal Cell Homeostasis in the Respiratory Epithelium of Hamsters. Int J Mol Sci 2022; 23:ijms23095124. [PMID: 35563514 PMCID: PMC9102945 DOI: 10.3390/ijms23095124] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 04/27/2022] [Accepted: 05/03/2022] [Indexed: 02/04/2023] Open
Abstract
Similar to many other respiratory viruses, SARS-CoV-2 targets the ciliated cells of the respiratory epithelium and compromises mucociliary clearance, thereby facilitating spread to the lungs and paving the way for secondary infections. A detailed understanding of mechanism involved in ciliary loss and subsequent regeneration is crucial to assess the possible long-term consequences of COVID-19. The aim of this study was to characterize the sequence of histological and ultrastructural changes observed in the ciliated epithelium during and after SARS-CoV-2 infection in the golden Syrian hamster model. We show that acute infection induces a severe, transient loss of cilia, which is, at least in part, caused by cilia internalization. Internalized cilia colocalize with membrane invaginations, facilitating virus entry into the cell. Infection also results in a progressive decline in cells expressing the regulator of ciliogenesis FOXJ1, which persists beyond virus clearance and the termination of inflammatory changes. Ciliary loss triggers the mobilization of p73+ and CK14+ basal cells, which ceases after regeneration of the cilia. Although ciliation is restored after two weeks despite the lack of FOXJ1, an increased frequency of cilia with ultrastructural alterations indicative of secondary ciliary dyskinesia is observed. In summary, the work provides new insights into SARS-CoV-2 pathogenesis and expands our understanding of virally induced damage to defense mechanisms in the conducting airways.
Collapse
|
10
|
Pinto AL, Rai RK, Brown JC, Griffin P, Edgar JR, Shah A, Singanayagam A, Hogg C, Barclay WS, Futter CE, Burgoyne T. Ultrastructural insight into SARS-CoV-2 entry and budding in human airway epithelium. Nat Commun 2022; 13:1609. [PMID: 35338134 PMCID: PMC8956608 DOI: 10.1038/s41467-022-29255-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/03/2022] [Indexed: 12/30/2022] Open
Abstract
Ultrastructural studies of SARS-CoV-2 infected cells are crucial to better understand the mechanisms of viral entry and budding within host cells. Here, we examined human airway epithelium infected with three different isolates of SARS-CoV-2 including the B.1.1.7 variant by transmission electron microscopy and tomography. For all isolates, the virus infected ciliated but not goblet epithelial cells. Key SARS-CoV-2 entry molecules, ACE2 and TMPRSS2, were found to be localised to the plasma membrane including microvilli but excluded from cilia. Consistently, extracellular virions were seen associated with microvilli and the apical plasma membrane but rarely with ciliary membranes. Profiles indicative of viral fusion where tomography showed that the viral membrane was continuous with the apical plasma membrane and the nucleocapsids diluted, compared with unfused virus, demonstrate that the plasma membrane is one site of entry where direct fusion releasing the nucleoprotein-encapsidated genome occurs. Intact intracellular virions were found within ciliated cells in compartments with a single membrane bearing S glycoprotein. Tomography showed concentration of nucleocapsids round the periphery of profiles strongly suggestive of viral budding into these compartments and this may explain how virions gain their S glycoprotein containing envelope.
Collapse
Affiliation(s)
- Andreia L Pinto
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK
| | - Ranjit K Rai
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK
| | - Jonathan C Brown
- Department of Infectious Disease, Imperial College London, London, W2 1PG, UK
| | - Paul Griffin
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK
| | - James R Edgar
- Department of Pathology, University of Cambridge, Cambridge, CB2 1QP, UK
| | - Anand Shah
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK
- MRC Centre of Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, W2 1PG, UK
| | - Aran Singanayagam
- Department of Infectious Disease, Imperial College London, London, W2 1PG, UK
- Centre for Molecular Bacteriology and Infection, Imperial College London, London, SW7 2DD, UK
| | - Claire Hogg
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK
- Academic Health Sciences Centre, Imperial College, London, London, SW3 6LY, UK
| | - Wendy S Barclay
- Department of Infectious Disease, Imperial College London, London, W2 1PG, UK
| | - Clare E Futter
- UCL Institute of Ophthalmology, University College London, London, EC1V 9EL, UK
| | - Thomas Burgoyne
- Royal Brompton Hospital, Guy's and St Thomas' NHS Foundation Trust, London, SW3 6NP, UK.
- UCL Institute of Ophthalmology, University College London, London, EC1V 9EL, UK.
| |
Collapse
|
11
|
Ultrastructural examination of lung "cryobiopsies" from a series of fatal COVID-19 cases hardly revealed infected cells. Virchows Arch 2022; 480:967-977. [PMID: 35294603 PMCID: PMC8924574 DOI: 10.1007/s00428-022-03308-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/24/2022] [Accepted: 03/07/2022] [Indexed: 11/10/2022]
Abstract
Ultrastructural analysis of autopsy samples from COVID-19 patients usually suffers from significant structural impairment possibly caused by the rather long latency between death of the patient and an appropriate sample fixation. To improve structural preservation of the tissue, we obtained samples from ventilated patients using a trans-bronchial “cryobiopsy” within 30 min after their death and fixed them immediately for electron microscopy. Samples of six COVID-19 patients with a documented histopathology were systematically investigated by thin section electron microscopy. The different samples and areas inspected revealed the ultrastructural correlates of the different phases of diffuse alveolar damage, including detachment of the alveolar epithelium, hyperplasia of type 2 cells, exudates, and accumulation of extracellular material, such as the hyaline membranes and fibrin. Macrophages and neutrophilic granulocytes were regularly detected. Structural integrity of endothelium was intact in regions where the alveolar epithelium was already detached. Aggregates of erythrocytes, leukocytes with fibrin, and thrombocytes were not observed. Coronavirus particles were only found in and around very few cells in one of the six patient samples. The type and origin of these cells could not be assessed although the overall structural preservation of the samples allowed the identification of pulmonary cell types. Hence, the observed alveolar damage is not associated with virus presence or structural impairment due to ongoing replication at later stages of the disease in fatal cases, which implies that the lung damage in these patients is at least propagated by alternative mechanisms, perhaps, an inappropriate immune or stress response.
Collapse
|
12
|
Okada Y, Yoshimura K, Toya S, Tsuchimochi M. Pathogenesis of taste impairment and salivary dysfunction in COVID-19 patients. JAPANESE DENTAL SCIENCE REVIEW 2021; 57:111-122. [PMID: 34257762 PMCID: PMC8266517 DOI: 10.1016/j.jdsr.2021.07.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/27/2021] [Accepted: 07/05/2021] [Indexed: 12/23/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19) is a highly transmissible pandemic disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The characteristics of the disease include a broad range of symptoms from mild to serious to death, with mild pneumonia to acute respiratory distress syndrome and complications in extrapulmonary organs. Taste impairment and salivary dysfunction are common early symptoms in COVID-19 patients. The mouth is a significant entry route for SARS-COV-2, similar to the nose and eyes. The cells of the oral epithelium, taste buds, and minor and major salivary glands express cell entry factors for SARS-COV-2, such as ACE2, TMPRSS2, and Furin. We describe the occurrence of taste impairment and salivary dysfunction in COVID-19 patients and show immunohistochemical findings regarding the cell entry factors in the oral tissue. We review and describe the pathogeneses of taste impairment and salivary dysfunction. Treatment for the oral disease is also described. Recently, it was reported that some people experience persistent and prolonged taste impairment and salivary dysfunction, described as post-COVID-19 syndrome or long COVID-19, after the acute illness of the infection has healed. To resolve these problems, it is important to understand the pathogenesis of oral complications. Recently, important advances have been reported in the understanding of gustatory impairment and salivary dysfunction. Although some progress has been made, considerable effort is still required for in-depth elucidation of the pathogenesis.
Collapse
Affiliation(s)
- Yasuo Okada
- Department of Pathology, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan
| | - Ken Yoshimura
- Department of Anatomy, The Nippon Dental University School of Life Dentistry at Niigata, 1-8 Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan
| | - Shuji Toya
- Oral and Maxillofacial Surgery, The Nippon Dental University Niigata Hospital, 1-8 Hamaura-cho, Chuo-ku, Niigata 951-8580, Japan
| | - Makoto Tsuchimochi
- The Nippon Dental University (Emeritus Professor), 1-9-20 Fujimi, Chiyoda-ku, Tokyo, 102-8159, Japan
| |
Collapse
|
13
|
Buqaileh R, Saternos H, Ley S, Aranda A, Forero K, AbouAlaiwi WA. Can cilia provide an entry gateway for SARS-CoV-2 to human ciliated cells? Physiol Genomics 2021; 53:249-258. [PMID: 33855870 PMCID: PMC8213509 DOI: 10.1152/physiolgenomics.00015.2021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 12/30/2022] Open
Abstract
A worldwide coronavirus pandemic is in full swing and, at the time of writing, there are only few treatments that have been successful in clinical trials, but no effective antiviral treatment has been approved. Because of its lethality, it is important to understand the current strain's effects and mechanisms not only in the respiratory system but also in other affected organ systems as well. Past coronavirus outbreaks caused by SARS-CoV and MERS-CoV inflicted life-threatening acute kidney injuries (AKI) on their hosts leading to significant mortality rates, which went somewhat overlooked in the face of the severe respiratory effects. Recent evidence has emphasized renal involvement in SARS-CoV-2, stressing that kidneys are damaged in patients with COVID-19. The mechanism by which this virus inflicts AKI is still unclear, but evidence from other coronavirus strains may hold some clues. Two theories exist for the proposed mechanism of AKI: 1) the AKI is a secondary effect to reduced blood and oxygen levels causing hyperinflammation and 2) the AKI is due to cytotoxic effects. Kidneys express angiotensin-converting enzyme-2 (ACE2), the confirmed SARS-CoV-2 target receptor as well as collectrin, an ACE2 homologue that localizes to the primary cilium, an organelle historically targeted by coronaviruses. Although the available literature suggests that kidney damage is leading to higher mortality rates in patients with COVID-19, especially in those with preexisting kidney and cardiovascular diseases, the pathogenesis of COVID-19 is still being investigated. Here, we present brief literature review supporting our proposed hypothesis of a possible link between SARS-CoV-2 cellular infection and cilia.
Collapse
Affiliation(s)
- Raghad Buqaileh
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| | - Hannah Saternos
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| | - Sidney Ley
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| | - Arianna Aranda
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| | - Kathleen Forero
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| | - Wissam A AbouAlaiwi
- Department of Pharmacology and Experimental Therapeutics, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, Ohio
| |
Collapse
|
14
|
Xie C, Martens JR. Potential Therapeutic Targets for Olfactory Dysfunction in Ciliopathies Beyond Single-Gene Replacement. Chem Senses 2021; 46:6159785. [PMID: 33690843 DOI: 10.1093/chemse/bjab010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Olfactory dysfunction is a common disorder in the general population. There are multiple causes, one of which being ciliopathies, an emerging class of human hereditary genetic disorders characterized by multiple symptoms due to defects in ciliary biogenesis, maintenance, and/or function. Mutations/deletions in a wide spectrum of ciliary genes have been identified to cause ciliopathies. Currently, besides symptomatic therapy, there is no available therapeutic treatment option for olfactory dysfunction caused by ciliopathies. Multiple studies have demonstrated that targeted gene replacement can restore the morphology and function of olfactory cilia in olfactory sensory neurons and further re-establish the odor-guided behaviors in animals. Therefore, targeted gene replacement could be potentially used to treat olfactory dysfunction in ciliopathies. However, due to the potential limitations of single-gene therapy for polygenic mutation-induced diseases, alternative therapeutic targets for broader curative measures need to be developed for olfactory dysfunction, and also for other symptoms in ciliopathies. Here we review the current understanding of ciliogenesis and maintenance of olfactory cilia. Furthermore, we emphasize signaling mechanisms that may be involved in the regulation of olfactory ciliary length and highlight potential alternative therapeutic targets for the treatment of ciliopathy-induced dysfunction in the olfactory system and even in other ciliated organ systems.
Collapse
Affiliation(s)
- Chao Xie
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, 1200 Newell Drive, Gainesville, FL 32610, USA.,Center for Smell and Taste, University of Florida College of Medicine, 1149 Newell Drive, Gainesville, FL 32610, USA
| | - Jeffrey R Martens
- Department of Pharmacology and Therapeutics, University of Florida College of Medicine, 1200 Newell Drive, Gainesville, FL 32610, USA.,Center for Smell and Taste, University of Florida College of Medicine, 1149 Newell Drive, Gainesville, FL 32610, USA
| |
Collapse
|
15
|
Adivitiya, Kaushik MS, Chakraborty S, Veleri S, Kateriya S. Mucociliary Respiratory Epithelium Integrity in Molecular Defense and Susceptibility to Pulmonary Viral Infections. BIOLOGY 2021; 10:95. [PMID: 33572760 PMCID: PMC7911113 DOI: 10.3390/biology10020095] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 01/08/2023]
Abstract
Mucociliary defense, mediated by the ciliated and goblet cells, is fundamental to respiratory fitness. The concerted action of ciliary movement on the respiratory epithelial surface and the pathogen entrapment function of mucus help to maintain healthy airways. Consequently, genetic or acquired defects in lung defense elicit respiratory diseases and secondary microbial infections that inflict damage on pulmonary function and may even be fatal. Individuals living with chronic and acute respiratory diseases are more susceptible to develop severe coronavirus disease-19 (COVID-19) illness and hence should be proficiently managed. In light of the prevailing pandemic, we review the current understanding of the respiratory system and its molecular components with a major focus on the pathophysiology arising due to collapsed respiratory epithelium integrity such as abnormal ciliary movement, cilia loss and dysfunction, ciliated cell destruction, and changes in mucus rheology. The review includes protein interaction networks of coronavirus infection-manifested implications on the molecular machinery that regulates mucociliary clearance. We also provide an insight into the alteration of the transcriptional networks of genes in the nasopharynx associated with the mucociliary clearance apparatus in humans upon infection by severe acute respiratory syndrome coronavirus-2.
Collapse
Affiliation(s)
- Adivitiya
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India; (A.); (M.S.K.); (S.C.)
| | - Manish Singh Kaushik
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India; (A.); (M.S.K.); (S.C.)
| | - Soura Chakraborty
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India; (A.); (M.S.K.); (S.C.)
| | - Shobi Veleri
- Drug Safety Division, ICMR-National Institute of Nutrition, Hyderabad 500007, India;
| | - Suneel Kateriya
- Laboratory of Optobiology, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India; (A.); (M.S.K.); (S.C.)
| |
Collapse
|
16
|
Akilesh S, Nicosia RF, Alpers CE, Tretiakova M, Hsiang TY, Gale M, Smith KD. Characterizing Viral Infection by Electron Microscopy: Lessons from the Coronavirus Disease 2019 Pandemic. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 191:222-227. [PMID: 33227297 PMCID: PMC7678435 DOI: 10.1016/j.ajpath.2020.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/20/2020] [Accepted: 11/03/2020] [Indexed: 12/13/2022]
Abstract
The severe acute respiratory syndrome coronavirus 2 pandemic has infected millions of individuals in the United States and caused hundreds of thousands of deaths. Direct infection of extrapulmonary tissues has been postulated, and using sensitive techniques, viral RNA has been detected in multiple organs in the body, including the kidney. However, direct infection of tissues outside of the lung has been more challenging to demonstrate. This has been in part due to misinterpretation of electron microscopy studies. In this perspective, we will discuss what is known about coronavirus infection, some of the basic ultrastructural cell biology that has been confused for coronavirus infection of cells, and rigorous criteria that should be used when identifying pathogens by electron microscopy.
Collapse
Affiliation(s)
- Shreeram Akilesh
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Roberto F Nicosia
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Charles E Alpers
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Maria Tretiakova
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Tien-Ying Hsiang
- Center for Innate Immunity and Immune Disease, Department of Immunology, University of Washington, Seattle, Washington
| | - Michael Gale
- Center for Innate Immunity and Immune Disease, Department of Immunology, University of Washington, Seattle, Washington
| | - Kelly D Smith
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington.
| |
Collapse
|
17
|
Buja LM, Wolf DA, Zhao B, Akkanti B, McDonald M, Lelenwa L, Reilly N, Ottaviani G, Elghetany MT, Trujillo DO, Aisenberg GM, Madjid M, Kar B. The emerging spectrum of cardiopulmonary pathology of the coronavirus disease 2019 (COVID-19): Report of 3 autopsies from Houston, Texas, and review of autopsy findings from other United States cities. Cardiovasc Pathol 2020; 48:107233. [PMID: 32434133 PMCID: PMC7204762 DOI: 10.1016/j.carpath.2020.107233] [Citation(s) in RCA: 272] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 04/27/2020] [Accepted: 04/28/2020] [Indexed: 02/06/2023] Open
Abstract
This paper collates the pathological findings from initial published autopsy reports on 23 patients with coronavirus disease 2019 (COVID-19) from 5 centers in the United States of America, including 3 cases from Houston, Texas. Findings confirm that COVID-19 is a systemic disease with major involvement of the lungs and heart. Acute COVID-19 pneumonia has features of a distinctive acute interstitial pneumonia with a diffuse alveolar damage component, coupled with microvascular involvement with intra- and extravascular fibrin deposition and intravascular trapping of neutrophils, and, frequently, with formation of microthombi in arterioles. Major pulmonary thromboemboli with pulmonary infarcts and/or hemorrhage occurred in 5 of the 23 patients. Two of the Houston cases had interstitial pneumonia with diffuse alveolar damage pattern. One of the Houston cases had multiple bilateral segmental pulmonary thromboemboli with infarcts and hemorrhages coupled with, in nonhemorrhagic areas, a distinctive interstitial lymphocytic pneumonitis with intra-alveolar fibrin deposits and no hyaline membranes, possibly representing a transition form to acute fibrinous and organizing pneumonia. Multifocal acute injury of cardiac myocytes was frequently observed. Lymphocytic myocarditis was reported in 1 case. In addition to major pulmonary pathology, the 3 Houston cases had evidence of lymphocytic pericarditis, multifocal acute injury of cardiomyocytes without inflammatory cellular infiltrates, depletion of splenic white pulp, focal hepatocellular degeneration and rare glomerular capillary thrombosis. Each had evidence of chronic cardiac disease: hypertensive left ventricular hypertrophy (420 g heart), dilated cardiomyopathy (1070 g heart), and hypertrophic cardiomyopathy (670 g heart). All 3 subjects were obese (BMIs of 33.8, 51.65, and 35.2 Kg/m2). Overall, the autopsy findings support the concept that the pathogenesis of severe COVID-19 disease involves direct viral-induced injury of multiple organs, including heart and lungs, coupled with the consequences of a procoagulant state with coagulopathy.
Collapse
Affiliation(s)
- Louis Maximilian Buja
- Departments of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA.
| | - Dwayne A Wolf
- Harris County Institute of Forensic Sciences, Houston, Texas, USA
| | - Bihong Zhao
- Departments of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Bindu Akkanti
- Internal Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA; Center for Advanced Cardiopulmonary Therapies and Transplantation, McGovern Medical School and Memorial Hermann Hospital-Texas Medical Center, Houston, Texas, USA
| | - Michelle McDonald
- Departments of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Laura Lelenwa
- Departments of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Noah Reilly
- Departments of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Giulia Ottaviani
- "Lino Rossi" Research Center for the Study and Prevention of Unexpected Perinatal Death and Sudden Infant Death Syndrome, Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
| | - M Tarek Elghetany
- Department of Pathology, Baylor College of Medicine and Texas Childrens Hospital, Houston, Texas, USA
| | - Daniel Ocazionez Trujillo
- Diagnostic and Interventional Imaging, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Gabriel M Aisenberg
- Internal Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA; Lyndon B. Johnson General Hospital, Harris Health, Houston, Texas, USA
| | - Mohammad Madjid
- Internal Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Biswajit Kar
- Internal Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA; Center for Advanced Cardiopulmonary Therapies and Transplantation, McGovern Medical School and Memorial Hermann Hospital-Texas Medical Center, Houston, Texas, USA
| |
Collapse
|
18
|
Li W, Li M, Ou G. COVID-19, cilia, and smell. FEBS J 2020; 287:3672-3676. [PMID: 32692465 PMCID: PMC7426555 DOI: 10.1111/febs.15491] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/26/2020] [Accepted: 07/17/2020] [Indexed: 12/17/2022]
Abstract
The novel coronavirus SARS‐CoV‐2 is the causative agent of the global coronavirus disease 2019 (COVID‐19) outbreak. In addition to pneumonia, other COVID‐19‐associated symptoms have been reported, including loss of smell (anosmia). However, the connection between infection with coronavirus and anosmia remains enigmatic. It has been reported that defects in olfactory cilia lead to anosmia. In this Viewpoint, we summarize transmission electron microscopic studies of cilia in virus‐infected cells. In the human nasal epithelium, coronavirus infects the ciliated cells and causes deciliation. Research has shown that viruses such as influenza and Sendai attach to the ciliary membrane. The Sendai virus enters cilia by fusing its viral membrane with the ciliary membrane. A recent study on SARS‐CoV‐2–human protein–protein interactions revealed that the viral nonstructural protein Nsp13 interacts with the centrosome components, providing a potential molecular link. The mucociliary escalator removes inhaled pathogenic particles and functions as the first line of protection mechanism against viral infection in the human airway. Thus, future investigation into the virus–cilium interface will help further the battle against COVID‐19.
Collapse
Affiliation(s)
- Wei Li
- School of Medicine, Tsinghua University, Beijing, China
| | - Ming Li
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, McGovern Institute for Brain Research, School of Life Sciences, MOE Key Laboratory for Protein Science, Tsinghua University, Beijing, China
| | - Guangshuo Ou
- Tsinghua-Peking Center for Life Sciences, Beijing Frontier Research Center for Biological Structure, McGovern Institute for Brain Research, School of Life Sciences, MOE Key Laboratory for Protein Science, Tsinghua University, Beijing, China
| |
Collapse
|
19
|
Pizzorno A, Padey B, Julien T, Trouillet-Assant S, Traversier A, Errazuriz-Cerda E, Fouret J, Dubois J, Gaymard A, Lescure FX, Dulière V, Brun P, Constant S, Poissy J, Lina B, Yazdanpanah Y, Terrier O, Rosa-Calatrava M. Characterization and Treatment of SARS-CoV-2 in Nasal and Bronchial Human Airway Epithelia. Cell Rep Med 2020; 1:100059. [PMID: 32835306 DOI: 10.1101/2020.03.31.017889] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/01/2020] [Accepted: 06/26/2020] [Indexed: 05/20/2023]
Abstract
In the current COVID-19 pandemic context, proposing and validating effective treatments represents a major challenge. However, the scarcity of biologically relevant pre-clinical models of SARS-CoV-2 infection imposes a significant barrier for scientific and medical progress, including the rapid transition of potentially effective treatments to the clinical setting. We use reconstituted human airway epithelia to isolate and then characterize the viral infection kinetics, tissue-level remodeling of the cellular ultrastructure, and transcriptional early immune signatures induced by SARS-CoV-2 in a physiologically relevant model. Our results emphasize distinctive transcriptional immune signatures between nasal and bronchial HAE, both in terms of kinetics and intensity, hence suggesting putative intrinsic differences in the early response to SARS-CoV-2 infection. Most important, we provide evidence in human-derived tissues on the antiviral efficacy of remdesivir monotherapy and explore the potential of the remdesivir-diltiazem combination as an option worthy of further investigation to respond to the still-unmet COVID-19 medical need.
Collapse
Affiliation(s)
- Andrés Pizzorno
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | - Blandine Padey
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Signia Therapeutics SAS, Lyon, France
| | - Thomas Julien
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Sophie Trouillet-Assant
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire Commun de Recherche HCL-bioMérieux, Centre Hospitalier Lyon-Sud, Pierre-Bénite, France
| | - Aurélien Traversier
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | | | | | - Julia Dubois
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | - Alexandre Gaymard
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire de Virologie, Centre National de Référence des Virus Influenza Sud, Institut des Agents Infectieux, Groupement Hospitalier Nord, Hospices Civils de Lyon, Lyon, France
| | - François-Xavier Lescure
- AP-HP, Infectious and Tropical Diseases Department, Bichat-Claude Bernard University Hospital, Paris, France
- University of Paris, French Institute for Health and Medical Research (INSERM), IAME U1137, Team DesCID, Paris, France
| | - Victoria Dulière
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Pauline Brun
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | | | - Julien Poissy
- Pôle de Réanimation, Hôpital Roger Salengro, Centre Hospitalier Régional et Universitaire de Lille, Université de Lille 2, Lille, France
| | - Bruno Lina
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire de Virologie, Centre National de Référence des Virus Influenza Sud, Institut des Agents Infectieux, Groupement Hospitalier Nord, Hospices Civils de Lyon, Lyon, France
| | - Yazdan Yazdanpanah
- AP-HP, Infectious and Tropical Diseases Department, Bichat-Claude Bernard University Hospital, Paris, France
- University of Paris, French Institute for Health and Medical Research (INSERM), IAME U1137, Team DesCID, Paris, France
| | - Olivier Terrier
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | - Manuel Rosa-Calatrava
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| |
Collapse
|
20
|
Pizzorno A, Padey B, Julien T, Trouillet-Assant S, Traversier A, Errazuriz-Cerda E, Fouret J, Dubois J, Gaymard A, Lescure FX, Dulière V, Brun P, Constant S, Poissy J, Lina B, Yazdanpanah Y, Terrier O, Rosa-Calatrava M. Characterization and Treatment of SARS-CoV-2 in Nasal and Bronchial Human Airway Epithelia. CELL REPORTS MEDICINE 2020; 1:100059. [PMID: 32835306 PMCID: PMC7373044 DOI: 10.1016/j.xcrm.2020.100059] [Citation(s) in RCA: 139] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/01/2020] [Accepted: 06/26/2020] [Indexed: 02/06/2023]
Abstract
In the current COVID-19 pandemic context, proposing and validating effective treatments represents a major challenge. However, the scarcity of biologically relevant pre-clinical models of SARS-CoV-2 infection imposes a significant barrier for scientific and medical progress, including the rapid transition of potentially effective treatments to the clinical setting. We use reconstituted human airway epithelia to isolate and then characterize the viral infection kinetics, tissue-level remodeling of the cellular ultrastructure, and transcriptional early immune signatures induced by SARS-CoV-2 in a physiologically relevant model. Our results emphasize distinctive transcriptional immune signatures between nasal and bronchial HAE, both in terms of kinetics and intensity, hence suggesting putative intrinsic differences in the early response to SARS-CoV-2 infection. Most important, we provide evidence in human-derived tissues on the antiviral efficacy of remdesivir monotherapy and explore the potential of the remdesivir-diltiazem combination as an option worthy of further investigation to respond to the still-unmet COVID-19 medical need. We use reconstituted human airway epithelia to characterize SARS-CoV-2 infection kinetics SARS-CoV-2 induces characteristic remodeling of the respiratory epithelium cellular ultrastructure SARS-CoV-2 induces differential early immune responses in nasal and bronchial HAE We evaluate the antiviral activity of remdesivir and remdesivir-diltiazem in both Vero E6 and HAE models
Collapse
Affiliation(s)
- Andrés Pizzorno
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | - Blandine Padey
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Signia Therapeutics SAS, Lyon, France
| | - Thomas Julien
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Sophie Trouillet-Assant
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire Commun de Recherche HCL-bioMérieux, Centre Hospitalier Lyon-Sud, Pierre-Bénite, France
| | - Aurélien Traversier
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | | | | | - Julia Dubois
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
| | - Alexandre Gaymard
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire de Virologie, Centre National de Référence des Virus Influenza Sud, Institut des Agents Infectieux, Groupement Hospitalier Nord, Hospices Civils de Lyon, Lyon, France
| | - François-Xavier Lescure
- AP-HP, Infectious and Tropical Diseases Department, Bichat-Claude Bernard University Hospital, Paris, France
- University of Paris, French Institute for Health and Medical Research (INSERM), IAME U1137, Team DesCID, Paris, France
| | - Victoria Dulière
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Pauline Brun
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | | | - Julien Poissy
- Pôle de Réanimation, Hôpital Roger Salengro, Centre Hospitalier Régional et Universitaire de Lille, Université de Lille 2, Lille, France
| | - Bruno Lina
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Laboratoire de Virologie, Centre National de Référence des Virus Influenza Sud, Institut des Agents Infectieux, Groupement Hospitalier Nord, Hospices Civils de Lyon, Lyon, France
| | - Yazdan Yazdanpanah
- AP-HP, Infectious and Tropical Diseases Department, Bichat-Claude Bernard University Hospital, Paris, France
- University of Paris, French Institute for Health and Medical Research (INSERM), IAME U1137, Team DesCID, Paris, France
| | - Olivier Terrier
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- Corresponding author
| | - Manuel Rosa-Calatrava
- CIRI, Centre International de Recherche en Infectiologie, (Team VirPath), Université de Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, 69007 Lyon, France
- VirNext, Faculté de Médecine RTH Laennec, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
- Corresponding author
| |
Collapse
|
21
|
|
22
|
Experimental infection of dromedaries with Middle East respiratory syndrome-Coronavirus is accompanied by massive ciliary loss and depletion of the cell surface receptor dipeptidyl peptidase 4. Sci Rep 2018; 8:9778. [PMID: 29950581 PMCID: PMC6021449 DOI: 10.1038/s41598-018-28109-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 06/15/2018] [Indexed: 12/13/2022] Open
Abstract
Middle East respiratory syndrome (MERS) represents an important respiratory disease accompanied by lethal outcome in one-third of human patients. Recent data indicate that dromedaries represent an important source of infection, although information regarding viral cell tropism and pathogenesis is sparse. In the current study, tissues of eight dromedaries receiving inoculation of MERS-Coronavirus (MERS-CoV) after recombinant Modified-Vaccinia-Virus-Ankara (MVA-S)-vaccination (n = 4), MVA-vaccination (mock vaccination, n = 2) and PBS application (mock vaccination, n = 2), respectively, were investigated. Tissues were analyzed by histology, immunohistochemistry, immunofluorescence, and scanning electron microscopy. MERS-CoV infection in mock-vaccinated dromedaries revealed high numbers of MERS-CoV-nucleocapsid positive cells, T cells, and macrophages within nasal turbinates and trachea at day four post infection. Double immunolabeling demonstrated cytokeratin (CK) 18 expressing epithelial cells to be the prevailing target cell of MERS-CoV, while CK5/6 and CK14 expressing cells did not co-localize with virus. In addition, virus was occasionally detected in macrophages. The acute disease was further accompanied by ciliary loss along with a lack of dipeptidyl peptidase 4 (DPP4), known to mediate virus entry. DPP4 was mainly expressed by human lymphocytes and dromedary monocytes, but overall the expression level was lower in dromedaries. The present study underlines significant species-specific manifestations of MERS and highlights ciliary loss as an important finding in dromedaries. The obtained results promote a better understanding of coronavirus infections, which pose major health challenges.
Collapse
|
23
|
Böttcher-Friebertshäuser E, Garten W, Klenk HD. Priming Time: How Cellular Proteases Arm Coronavirus Spike Proteins. ACTIVATION OF VIRUSES BY HOST PROTEASES 2018. [PMCID: PMC7122371 DOI: 10.1007/978-3-319-75474-1_4] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Coronaviruses are enveloped RNA viruses that infect mammals and birds. Infection of humans with globally circulating human coronaviruses is associated with the common cold. In contrast, transmission of animal coronaviruses to humans can result in severe disease: The severe acute respiratory syndrome (SARS) and the Middle East respiratory syndrome (MERS) are responsible for hundreds of deaths in Asia and the Middle East, respectively, and are both caused by members of the genus Betacoronavirus, SARS-CoV, and MERS-CoV that were zoonotically transmitted from an animal host to humans. At present, neither vaccines nor specific treatment is available to combat coronavirus infection in humans, and novel antiviral strategies are urgently sought. The viral spike protein (S) mediates the first essential step in coronavirus infection, viral entry into target cells. For this, the S protein critically depends on priming by host cell proteases, and the responsible enzymes are potential targets for antiviral intervention. Recent studies revealed that the endosomal cysteine protease cathepsin L and the serine proteases furin and TMPRSS2 prime the S proteins of SARS-CoV and MERS-CoV and provided evidence that successive S protein cleavage at two sites is required for S protein priming. Moreover, mechanisms that control protease choice were unraveled, and insights were obtained into which enzyme promotes viral spread in the host. Here, we will provide basic information on S protein function and proteolytic priming, and we will then discuss recent progress in our understanding of the priming of the S proteins of SARS-CoV and MERS-CoV.
Collapse
Affiliation(s)
| | - Wolfgang Garten
- Institut für Virologie, Philipps Universität, Marburg, Germany
| | | |
Collapse
|
24
|
Coronaviruses, Including Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS). MANDELL, DOUGLAS, AND BENNETT'S PRINCIPLES AND PRACTICE OF INFECTIOUS DISEASES 2015. [PMCID: PMC7151770 DOI: 10.1016/b978-1-4557-4801-3.00157-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
25
|
Roy Y, Sivathanu V, Das SK. Effect of bunching of cilia and their interplay on muco-ciliary transport. Comput Biol Med 2013; 43:1758-72. [PMID: 24209922 PMCID: PMC7094451 DOI: 10.1016/j.compbiomed.2013.08.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Revised: 07/09/2013] [Accepted: 08/18/2013] [Indexed: 12/04/2022]
Abstract
Cilia are hair-like organelles projecting from a eukaryotic cell, used either for locomotion or as sensors. Cilia commonly occur in patches. To take this into consideration, we represent cilia in multiple patches, instead of the conventional ‘dense mat’ representation. We focus on the combined action and interplay of these patches. The effects of varying the frequency, spacing and phase lag of the beating of one cilia bunch with respect to the beating of adjacent patches are studied. We model the Airway Surface Liquid (ASL) as a three-layer structure. The possibility of an optimum frequency of beating is noted and the change of mucous flow under different spacing and phase differences are observed.
Collapse
Affiliation(s)
- Yagnaseni Roy
- Department of Mechanical Engineering, SRM University, Chennai 603203, India
| | | | | |
Collapse
|
26
|
Chan RWY, Chan MCW, Agnihothram S, Chan LLY, Kuok DIT, Fong JHM, Guan Y, Poon LLM, Baric RS, Nicholls JM, Peiris JSM. Tropism of and innate immune responses to the novel human betacoronavirus lineage C virus in human ex vivo respiratory organ cultures. J Virol 2013; 87:6604-14. [PMID: 23552422 PMCID: PMC3676115 DOI: 10.1128/jvi.00009-13] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Accepted: 03/12/2013] [Indexed: 01/11/2023] Open
Abstract
Since April 2012, there have been 17 laboratory-confirmed human cases of respiratory disease associated with newly recognized human betacoronavirus lineage C virus EMC (HCoV-EMC), and 7 of them were fatal. The transmissibility and pathogenesis of HCoV-EMC remain poorly understood, and elucidating its cellular tropism in human respiratory tissues will provide mechanistic insights into the key cellular targets for virus propagation and spread. We utilized ex vivo cultures of human bronchial and lung tissue specimens to investigate the tissue tropism and virus replication kinetics following experimental infection with HCoV-EMC compared with those following infection with human coronavirus 229E (HCoV-229E) and severe acute respiratory syndrome coronavirus (SARS-CoV). The innate immune responses elicited by HCoV-EMC were also investigated. HCoV-EMC productively replicated in human bronchial and lung ex vivo organ cultures. While SARS-CoV productively replicated in lung tissue, replication in human bronchial tissue was limited. Immunohistochemistry revealed that HCoV-EMC infected nonciliated bronchial epithelium, bronchiolar epithelial cells, alveolar epithelial cells, and endothelial cells. Transmission electron microscopy showed virions within the cytoplasm of bronchial epithelial cells and budding virions from alveolar epithelial cells (type II). In contrast, there was minimal HCoV-229E infection in these tissues. HCoV-EMC failed to elicit strong type I or III interferon (IFN) or proinflammatory innate immune responses in ex vivo respiratory tissue cultures. Treatment of human lung tissue ex vivo organ cultures with type I IFNs (alpha and beta IFNs) at 1 h postinfection reduced the replication of HCoV-EMC, suggesting a potential therapeutic use of IFNs for treatment of human infection.
Collapse
Affiliation(s)
- Renee W. Y. Chan
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong SAR, China
| | - Michael C. W. Chan
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Sudhakar Agnihothram
- Departments of Epidemiology and Microbiology and Immunology, Gillings School of Global Public Health, and School of Medicine, The University of North Carolina, Chapel Hill, North Carolina, USA
| | - Louisa L. Y. Chan
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Denise I. T. Kuok
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Joanne H. M. Fong
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Y. Guan
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- State Key Laboratory of Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Leo L. M. Poon
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- State Key Laboratory of Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ralph S. Baric
- Departments of Epidemiology and Microbiology and Immunology, Gillings School of Global Public Health, and School of Medicine, The University of North Carolina, Chapel Hill, North Carolina, USA
| | - John M. Nicholls
- Department of Pathology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong SAR, China
| | - J. S. Malik Peiris
- Centre of Influenza Research and School of Public Health, LKS Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
- State Key Laboratory of Emerging Infectious Diseases, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| |
Collapse
|
27
|
The transmembrane domain of the severe acute respiratory syndrome coronavirus ORF7b protein is necessary and sufficient for its retention in the Golgi complex. J Virol 2008; 82:9477-91. [PMID: 18632859 DOI: 10.1128/jvi.00784-08] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The severe acute respiratory syndrome coronavirus (SARS-CoV) ORF7b (also called 7b) protein is an integral membrane protein that is translated from a bicistronic open reading frame encoded within subgenomic RNA 7. When expressed independently or during virus infection, ORF7b accumulates in the Golgi compartment, colocalizing with both cis- and trans-Golgi markers. To identify the domains of this protein that are responsible for Golgi localization, we have generated a set of mutant proteins and analyzed their subcellular localizations by indirect immunofluorescence confocal microscopy. The N- and C-terminal sequences are dispensable, but the ORF7b transmembrane domain (TMD) is essential for Golgi compartment localization. When the TMD of human CD4 was replaced with the ORF7b TMD, the resulting chimeric protein localized to the Golgi complex. Scanning alanine mutagenesis identified two regions in the carboxy-terminal portion of the TMD that eliminated the Golgi complex localization of the chimeric CD4 proteins or ORF7b protein. Collectively, these data demonstrate that the Golgi complex retention signal of the ORF7b protein resides solely within the TMD.
Collapse
|
28
|
Chan PKS, Tang JW, Hui DSC. SARS: clinical presentation, transmission, pathogenesis and treatment options. Clin Sci (Lond) 2006; 110:193-204. [PMID: 16411895 DOI: 10.1042/cs20050188] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
SARS (severe acute respiratory syndrome) appeared as the first emerging infectious disease of this century. It is fortunate that the culprit virus can be grown without much difficulty from a commonly used cell line, allowing an unlimited supply of isolates for further molecular studies and leading to the development of sensitive diagnostic assays. How the virus has successfully jumped the species barrier is still a mystery. The superspreading events that occurred within hospital, hotel and high-density housing estate opens a new chapter in the mechanisms and routes of virus transmission. The old practice of quarantine proved to be still useful in controlling the global outbreak. Despite all the available sophisticated tests, alertness with early recognition by healthcare workers and prompt isolation of suspected cases is still the most important step for containing the spread of the infection. Although the rapidly evolving outbreak did not allow the conducting of systematic clinical trails to evaluate treatment options, the accumulated experience on managing SARS patients will improve the clinical outcome should SARS return. Although SARS led to more than 700 deaths worldwide, the lessons learnt have prepared healthcare systems worldwide to face future emerging and re-emerging infections.
Collapse
Affiliation(s)
- Paul K S Chan
- Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, People's Republic of China.
| | | | | |
Collapse
|
29
|
Bellodi S, Tosca MA, Pulvirenti G, Petecchia L, Serpero L, Silvestri M, Sabatini F, Battistini E, Rossi GA. Activity of budesonide on nasal neutrophilic inflammation and obstruction in children with recurrent upper airway infections. A preliminary investigation. Int J Pediatr Otorhinolaryngol 2006; 70:445-52. [PMID: 16140398 DOI: 10.1016/j.ijporl.2005.07.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2005] [Accepted: 07/24/2005] [Indexed: 11/28/2022]
Abstract
OBJECTIVE While it is widely accepted that inhaled glucocorticosteroids represent an effective treatment for allergic rhinitis, little is known on the specific effects of this therapeutic approach in other upper airway disorders of childhood. The aim of the study was to evaluate the improvement of clinical symptoms and changes in local cellular inflammatory reaction induced by budesonide inhalation suspension in children with recurrent nasal infections using budesonide inhalation suspension delivered by Rinowash, a nebulizer designed to treat upper airway structures. METHODS In a randomized, controlled-open study, 14 children (5.88+/-0.56 years of age) with recurrent upper airway infections and chronic nasal obstruction were enrolled and randomly treated for 7-10 days either with budesonide inhalation suspension (250 microg/bidie) (nine patients) or with saline solution (five patients). Before and after treatment, inflammatory cells in nasal brushing and nasal symptom score were evaluated. RESULTS Out of the nine patients treated with budesonide, two were excluded from the analysis because of acute respiratory infections requiring systemic antibiotic treatment. A significant decrease in nasal brushing neutrophil percentage was observed after treatment with budesonide (P=0.016) but not after saline solution treatment (P=1.00). No significant changes in nasal brushing mononuclear cell or eosinophil proportions were observed after treatment with budesonide inhalation suspension or saline solution (P=NS, each comparison). Treatment with budesonide, but not with saline solution, was associated with a significant reduction in nasal obstruction (P=0.016). CONCLUSIONS These preliminary data indicate that short-term treatment with budesonide inhalation suspension, used for an indication out of label, may significantly reduce local neutrophilic inflammation and nasal obstruction in children with recurrent upper airway infections.
Collapse
Affiliation(s)
- Simona Bellodi
- U.O.C. di Pneumologia, I.R.C.C.S. G. Gaslini, Istituto G. Gaslini, Largo G. Gaslini, 5, 16147 Genoa, Italy
| | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
This chapter describes the interactions between the different structural components of the viruses and discusses their relevance for the process of virion formation. Two key factors determine the efficiency of the assembly process: intracellular transport and molecular interactions. Many viruses have evolved elaborate strategies to ensure the swift and accurate delivery of the virion components to the cellular compartment(s) where they must meet and form (sub) structures. Assembly of viruses starts in the nucleus by the encapsidation of viral DNA, using cytoplasmically synthesized capsid proteins; nucleocapsids then migrate to the cytosol, by budding at the inner nuclear membrane followed by deenvelopment, to pick up the tegument proteins.
Collapse
Affiliation(s)
- Cornelis A M de Haan
- Virology Division, Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584 CL Utrecht, The Netherlands
| | | |
Collapse
|
31
|
Roberts A, Vogel L, Guarner J, Hayes N, Murphy B, Zaki S, Subbarao K. Severe acute respiratory syndrome coronavirus infection of golden Syrian hamsters. J Virol 2005; 79:503-11. [PMID: 15596843 PMCID: PMC538722 DOI: 10.1128/jvi.79.1.503-511.2005] [Citation(s) in RCA: 225] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Small animal models are needed in order to evaluate the efficacy of candidate vaccines and antivirals directed against the severe acute respiratory syndrome coronavirus (SARS CoV). We investigated the ability of SARS CoV to infect 5-week-old Golden Syrian hamsters. When administered intranasally, SARS CoV replicates to high titers in the lungs and nasal turbinates. Peak replication in the lower respiratory tract was noted on day 2 postinfection (p.i.) and was cleared by day 7 p.i. Low levels of virus were present in the nasal turbinates of a few hamsters at 14 days p.i. Viral replication in epithelial cells of the respiratory tract was accompanied by cellular necrosis early in infection, followed by an inflammatory response coincident with viral clearance, focal consolidation in pulmonary tissue, and eventual pulmonary tissue repair. Despite high levels of virus replication and associated pathology in the respiratory tract, the hamsters showed no evidence of disease. Neutralizing antibodies were detected in sera at day 7 p.i., and mean titers at day 28 p.i. exceeded 1:400. Hamsters challenged with SARS CoV at day 28 p.i. were completely protected from virus replication and accompanying pathology in the respiratory tract. Comparing these data to the mouse model, SARS CoV replicates to a higher titer and for a longer duration in the respiratory tract of hamsters and is accompanied by significant pathology that is absent in mice. Viremia and extrapulmonary spread of SARS CoV to liver and spleen, which are seen in hamsters, were not detected in mice. The hamster, therefore, is superior to the mouse as a model for the evaluation of antiviral agents and candidate vaccines against SARS CoV replication.
Collapse
Affiliation(s)
- Anjeanette Roberts
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Disease, Bethesda, Maryland 20892, USA.
| | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
There are at least eight categories of cilia in the human body and malfunctioning of any one or several of them will have different consequences for the patient. A genetic error of the respiratory cilia (9 + 2) is the cause of the airways disease named immotile-cilia syndrome (or PCD), whereas defective ependymal cilia (9 + 2) carries an increased risk of hydrocephalus. When the so-called nodal cilia (9 + 0) of the early embryo are malfunctioning, there is a random determination of asymmetry of the heart and visceral organs ('a 50% risk of situs inversus'). Some genes are responsible for the synthesis, transport, and assembly of the cilia, and mutations in these genes may lead to progressive degeneration of ciliary structures, such as the connecting cilium (9 + 0) of the photoreceptor cells-this is the cause of retinitis pigmentosa. Ciliary malfunctions due to genetic errors tend to be systemic and life-long, whereas acquired diseases are local and may be temporary only.
Collapse
Affiliation(s)
- B A Afzelius
- Department of Zoophysiology, Arrhenius Laboratories F3, Stockholm University, SE-106 91 Stockholm, Sweden.
| |
Collapse
|
33
|
Bousquet J, Van Cauwenberge P, Khaltaev N. Allergic rhinitis and its impact on asthma. J Allergy Clin Immunol 2001; 108:S147-334. [PMID: 11707753 DOI: 10.1067/mai.2001.118891] [Citation(s) in RCA: 2090] [Impact Index Per Article: 90.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- J Bousquet
- Department of Allergy and Respiratory Diseases, University Hospital and INSERM, Montpellier, France
| | | | | |
Collapse
|
34
|
Affiliation(s)
- N Mygind
- Department of Respiratory Diseases, University Hospital of Aarhus, Denmark
| | | | | | | |
Collapse
|
35
|
Abstract
Epithelial cells are the first host cells to be infected by incoming c oronaviruses. Recent observations in vitro show that coronaviruses are released from a specific side of these polarized cells, and this polarized release might be important for the spread of the infection in vivo. Mechanisms for the directional sorting of coronaviruses might be similar to those governing the polar release of secretory proteins.
Collapse
Affiliation(s)
- J W Rossen
- Virology Division of the Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, The Netherlands
| | | | | |
Collapse
|