Gut Microbiota Plays Crucial Role in COVID-19 Pathogenesis

Strategic Insights -

Research has highlighted the complex interplay between the gut microbiota and systemic immune responses in the COVID-19 pandemic. A study published in the journal Microorganisms found that disruptions in gut microbial diversity and function, commonly referred to as dysbiosis, contribute to the pathogenesis of SARS-CoV-2 infection. The study, conducted by researchers from Sao Paulo State University (UNESP), assessed the gut bacteriome and permeability in SARS-CoV-2-infected patients using 16S sequencing and ELISA assays.

Key Takeaways:

  • The study found significant alterations in alpha and beta diversity metrics in patients with COVID-19 and those with post-COVID-19 condition compared to controls.
  • Differential abundance and taxonomic analyses revealed distinct microbial profiles in the infected groups.
  • Increased plasma levels of IL-2, IL-6, IL-17A, IFN-g, and zonulin were detected in patient samples, indicating compromised intestinal barrier function.
  • Some genera were elevated during acute infection, which was positively correlated with C-reactive protein.
  • The study concluded that gut dysbiosis may contribute to bacterial translocation and systemic inflammation.
  • Modulating the gut microbiota could support immune regulation in SARS-CoV-2 infection.
  • The research was supported by CoordenacaO De Aperfeicoamento De Pessoal De Nivel Superior-brasil, SaO Paulo Research Foundation, Brazilian National Council For Scientific And Technological Development, and The Covenant Between Unesp And The Brazilian Ministry of Health.

Statistics:

  • 79 patients with COVID-19
  • 141 patients with post-COVID-19 condition
  • 97 controls
  • Increased plasma levels of IL-2, IL-6, IL-17A, IFN-g, and zonulin
  • Some genera elevated during acute infection
  • Correlated with C-reactive protein
  • Zonulin levels associated with increased levels of * * Enterobacteriaceae* * and * * Escherichia-Shigella* *

Sources:

  • Bacteriome Signature in SARS-CoV-2-Infected Patients Correlates with Increased Gut Permeability and Systemic Inflammatory Cytokines. Microorganisms, 2025,13(6):1407. (Microorganisms - http://www.mdpi.com/journal/microorganisms).
  • CoordenacaO De Aperfeicoamento De Pessoal De Nivel Superior-brasil
  • SaO Paulo Research Foundation
  • Brazilian National Council For Scientific And Technological Development
  • The Covenant Between Unesp And The Brazilian Ministry of Health