Latent tuberculosis co-infection is associated with heightened levels of humoral, cytokine and acute phase responses in seropositive SARS-CoV-2 infection - 26/08/21
Highlights |
• | LTBI#x002B; and seropositive for SARS-CoV-2 infected individuals were associated with elevated IgM, IgG and IgA antibody titres. |
• | LTBI#x002B; and seropositive for SARS-CoV-2 infected individuals were associated with enhanced neutralization activity. |
• | LTBI#x002B; individuals exhibited significantly elevated plasma levels of cytokines, chemokines and acute phase responses. |
• | Our study clearly indicates the impact of LTBI on the humoral and innate immune responses in SARS-CoV-2 infection. |
Summary |
Objectives |
Latent Tuberculosis infection (LTBI) is postulated to modulate immune responses and alter disease severity in SARS-CoV-2 co-infection. However, no data exist on the effect of LTBI on the immune responses in SARS-CoV-2 co-infected individuals.
Methods |
We examined the SARS-CoV-2 specific antibody responses, plasma cytokines, chemokines, acute phase proteins and growth factor levels in LTBI positive and negative individuals with SARS-CoV-2 infection.
Results |
Our results demonstrated that individuals with LTBI (LTBI+) and seropositive for SARS-CoV-2 infection were associated with elevated SARS-CoV-2 specific IgM, IgG and IgA antibodies, as well as enhanced neutralization activity compared to those negative for LTBI (LTBI-) individuals. Our results also demonstrate that LTBI+ individuals exhibited significantly higher plasma levels of IFNγ, IL-2, TNFα, IL-1α, IL-1β, IL-6, IL-12, IL-15, IL-17, IL-3, GM-CSF, IL-10, IL-25, IL-33, CCL3 and CXCL10 compared to LTBI- individuals. Finally, our results show that LTBI+ individuals exhibit significantly higher levels of C-reactive protein, alpha-2 macroglobulin, VEGF and TGFα compared to LTBI- individuals.
Conclusions |
Thus, our data clearly demonstrates that LTBI+ individuals seropositive for SARS-CoV-2 infection exhibit heightened levels of humoral, cytokine and acute phase responses compared to LTBI- individuals. Thus, LTBI is associated with modulation of antibody and cytokine responses as well as systemic inflammation in individuals seropositive for SARS-CoV-2 infection.
Le texte complet de cet article est disponible en PDF.Keywords : LTBI, SARS-CoV-2, Seropositive SARS-CoV-2, Neutralizing antibodies, Acute phase proteins, Cytokines
Plan
Vol 83 - N° 3
P. 339-346 - septembre 2021 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.