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Polarized Calu-3 Cells Serve as an Intermediary Model for SARS-CoV-2 Infection.
Methods Mol Biol
January 2025
Department of Infectious Diseases, University of Melbourne at the Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
Human nasal epithelium (HNE) organoid models of SARS-CoV-2 infection were adopted globally during the COVID-19 pandemic once it was recognized that the Vero cell line commonly used by virologists did not recapitulate human infection. However, the widespread use of HNE organoid infection models was hindered by the high cost of media and consumables, and the inherent limitation of basal cells as a scalable continuous source of cells. The human Calu-3 cell line, generated from a lung adenocarcinoma, was shown to largely recapitulate infection of the human epithelium and to preserve the SARS-CoV-2 genomic fidelity.
View Article and Find Full Text PDFAsymptomatic lung abscess of aspergillus in a female without previous lung diseases or immunocompromise: a case report.
BMC Infect Dis
January 2025
Department of Respiratory and Critical Care Medicine, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.
Background: Chronic pulmonary abscess usually results from bacterial or mycobacterium infection, but rarely from aspergillosis. Chronic pulmonary aspergillosis is usually found in a person with structural lung disease or immunocompromise. Here, we report a case of chronic lung abscess of aspergillosis without immunocompromise, structural lung diseases or even clinical symptoms.
View Article and Find Full Text PDFPulmonary hydatid cyst misdiagnosed as lung cancer.
IDCases
December 2024
Department of Cardiac and Thoracic Surgery, The Military Hospital of Instruction of Tunis, Tunisia.
Hydatid disease is endemic in Tunisia. Whereas uncomplicated pulmonary hydatid cysts are easily diagnosed on radiological findings, complicated and atypical forms may be misdiagnosed and confused with other pulmonary lesions, mainly lung malignancies. We report a case of a 47-year-old woman, who presented with a 3-month history of hemoptysis.
View Article and Find Full Text PDFDynamic change of polarity in spread through air spaces of pulmonary malignancies.
J Pathol
January 2025
Department of Clinical Bio-resource Research and Development, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Spread through air spaces (STAS) is a histological finding of lung tumours where tumour cells exist within the air space of the lung parenchyma beyond the margin of the main tumour. Although STAS is an important prognostic factor, the pathobiology of STAS remains unclear. Here, we investigated the mechanism of STAS by analysing the relationship between STAS and polarity switching in vivo and in vitro.
View Article and Find Full Text PDFWeakened Airway Epithelial Junctions and Enhanced Neutrophil Elastase Release Contribute to Age-Dependent Bacteremia Risk Following Pneumococcal Pneumonia.
Aging Cell
January 2025
Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA, USA.
Streptococcus pneumoniae (Sp; pneumococcus), the most common agent of community-acquired pneumonia, can spread systemically, particularly in the elderly, highlighting the need for adjunctive therapies. The airway epithelial barrier defends against bacteremia and is dependent upon apical junctional complex (AJC) proteins such as E-cadherin. After mouse lung challenge, pneumolysin (PLY), a key Sp virulence factor, stimulates epithelial secretion of an inflammatory eicosanoid, triggering the infiltration of polymorphonuclear leukocytes (PMNs) that secrete high levels of neutrophil elastase (NE), thus promoting epithelial damage and systemic infection.
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