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COVID-19 Lung Pathogenesis in SARS-CoV-2 Autopsy Cases.
Valdebenito, Silvana; Bessis, Simon; Annane, Djillali; Lorin de la Grandmaison, Geoffroy; Cramer-Bordé, Elisabeth; Prideaux, Brendan; Eugenin, Eliseo A; Bomsel, Morgane.
  • Valdebenito S; Department of Neuroscience, Cell Biology and Anatomy, University of Texas Medical Branch (UTMB), Galveston, TX, United States.
  • Bessis S; Service des Maladies Infectieuses, Centre Hospitalier Universitaire Raymond Poincaré, AP-HP, Garches, France.
  • Annane D; Intensive Care Unit, Raymond Poincaré Hospital (AP-HP), Paris, France.
  • Lorin de la Grandmaison G; Simone Veil School of Medicine, Université of Versailles, Versailles, France.
  • Cramer-Bordé E; University Paris Saclay, Garches, France.
  • Prideaux B; Department of Forensic Medicine and Pathology, Versailles Saint-Quentin Université, AP-HP, Raymond Poincaré Hospital, Garches, France.
  • Eugenin EA; University of Versailles Saint Quentin en Yveline, Versailles, France.
  • Bomsel M; Department of Neuroscience, Cell Biology and Anatomy, University of Texas Medical Branch (UTMB), Galveston, TX, United States.
Front Immunol ; 12: 735922, 2021.
Article in English | MEDLINE | ID: covidwho-1477823
ABSTRACT
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a major public health issue. COVID-19 is considered an airway/multi-systemic disease, and demise has been associated with an uncontrolled immune response and a cytokine storm in response to the virus. However, the lung pathology, immune response, and tissue damage associated with COVID-19 demise are poorly described and understood due to safety concerns. Using post-mortem lung tissues from uninfected and COVID-19 deadly cases as well as an unbiased combined analysis of histology, multi-viral and host markers staining, correlative microscopy, confocal, and image analysis, we identified three distinct phenotypes of COVID-19-induced lung damage. First, a COVID-19-induced hemorrhage characterized by minimal immune infiltration and large thrombus; Second, a COVID-19-induced immune infiltration with excessive immune cell infiltration but no hemorrhagic events. The third phenotype correspond to the combination of the two previous ones. We observed the loss of alveolar wall integrity, detachment of lung tissue pieces, fibroblast proliferation, and extensive fibrosis in all three phenotypes. Although lung tissues studied were from lethal COVID-19, a strong immune response was observed in all cases analyzed with significant B cell and poor T cell infiltrations, suggesting an exhausted or compromised immune cellular response in these patients. Overall, our data show that SARS-CoV-2-induced lung damage is highly heterogeneous. These individual differences need to be considered to understand the acute and long-term COVID-19 consequences.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Pulmonary Alveoli / Pulmonary Fibrosis / Lung Injury / COVID-19 Type of study: Prognostic study Topics: Long Covid Limits: Aged / Female / Humans / Male / Middle aged Language: English Journal: Front Immunol Year: 2021 Document Type: Article Affiliation country: Fimmu.2021.735922

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Pulmonary Alveoli / Pulmonary Fibrosis / Lung Injury / COVID-19 Type of study: Prognostic study Topics: Long Covid Limits: Aged / Female / Humans / Male / Middle aged Language: English Journal: Front Immunol Year: 2021 Document Type: Article Affiliation country: Fimmu.2021.735922