Baricitinib attenuates the proinflammatory phase of COVID-19 driven by lung-infiltrating monocytes.

Brian Dobosh, Keivan Zandi, Diego Moncada Giraldo, Shu Ling Goh, Kathryn Musall, Milagros Aldeco, Julia LeCher, Vincent D Giacalone, Junkai Yang, Devon J Eddins, Manoj Bhasin, Eliver Ghosn, Vikas Sukhatme, Raymond F Schinazi, Rabindra Tirouvanziam
Author Information
  1. Brian Dobosh: Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Center for CF and Airways Disease Research, Children's Healthcare of Atlanta, Atlanta, GA, USA.
  2. Keivan Zandi: Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.
  3. Diego Moncada Giraldo: Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Center for CF and Airways Disease Research, Children's Healthcare of Atlanta, Atlanta, GA, USA.
  4. Shu Ling Goh: Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.
  5. Kathryn Musall: Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.
  6. Milagros Aldeco: Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Center for CF and Airways Disease Research, Children's Healthcare of Atlanta, Atlanta, GA, USA.
  7. Julia LeCher: Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.
  8. Vincent D Giacalone: Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Center for CF and Airways Disease Research, Children's Healthcare of Atlanta, Atlanta, GA, USA.
  9. Junkai Yang: Lowance Center for Human Immunology, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.
  10. Devon J Eddins: Lowance Center for Human Immunology, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.
  11. Manoj Bhasin: Department of Pediatrics and Department of Biomedical Bioinformatics, Emory University School of Medicine, Atlanta, GA, USA.
  12. Eliver Ghosn: Lowance Center for Human Immunology, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.
  13. Vikas Sukhatme: Department of Medicine and the Morningside Center for Innovative and Affordable Medicine, Emory University School of Medicine, Atlanta, GA, USA.
  14. Raymond F Schinazi: Laboratory of Biochemical Pharmacology, Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA.
  15. Rabindra Tirouvanziam: Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, USA; Center for CF and Airways Disease Research, Children's Healthcare of Atlanta, Atlanta, GA, USA. Electronic address: tirouvanziam@emory.edu.

Abstract

SARS-CoV-2-infected subjects are generally asymptomatic during initial viral replication but may suffer severe immunopathology after the virus has receded and monocytes have infiltrated the airways. In bronchoalveolar lavage fluid from severe COVID-19 patients, monocytes express mRNA encoding inflammatory mediators and contain SARS-CoV-2 transcripts. We leverage a human small airway model of infection and inflammation, whereby primary blood monocytes transmigrate across SARS-CoV-2-infected lung epithelium to characterize viral burden, gene expression, and inflammatory mediator secretion by epithelial cells and monocytes. In this model, lung-infiltrating monocytes acquire SARS-CoV-2 from the epithelium and upregulate expression and secretion of inflammatory mediators, mirroring in vivo data. Combined use of baricitinib (Janus kinase inhibitor) and remdesivir (nucleoside analog) enhances antiviral signaling and viral clearance by SARS-CoV-2-positive monocytes while decreasing secretion of proneutrophilic mediators associated with acute respiratory distress syndrome. These findings highlight the role of lung-infiltrating monocytes in COVID-19 pathogenesis and their importance as a therapeutic target.

Keywords

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Grants

  1. R01 AI123126/NIAID NIH HHS
  2. R01 MH116695/NIMH NIH HHS

MeSH Term

Azetidines
Humans
Inflammation Mediators
Lung
Monocytes
Purines
Pyrazoles
SARS-CoV-2
Sulfonamides
COVID-19 Drug Treatment

Chemicals

Azetidines
Inflammation Mediators
Purines
Pyrazoles
Sulfonamides
baricitinib