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Updated: Nov 8, 2025
05:23
Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization
Published on: December 23, 2020
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Linkage of Lambda Interferons in Protection Against Severe COVID-19
Mehdi Shahbazi1,2, Parviz Amri Maleh3, Mojgan Bagherzadeh2
1Department of Immunology, School of Medicine, Babol University of Medical Sciences, Babol, Iran.
Summary
Higher levels of type III interferons (IFN-λs) correlate with milder COVID-19 symptoms. These findings suggest IFN-λs could be a potential therapy for severe coronavirus disease-2019.
Area of Science:
- Immunology
- Virology
- Infectious Diseases
Background:
- Type III interferons (IFN-λs) are crucial in antiviral defense at mucosal barriers.
- IFN-λs are implicated in the immune response to viral infections, including respiratory viruses.
Purpose of the Study:
- To investigate serum levels of IFN-λ1 and IFN-λ2 in patients with COVID-19.
- To compare IFN-λ levels between COVID-19 patients with varying disease severity and healthy controls.
Main Methods:
- Serum samples were collected from 64 COVID-19 patients (ICU and non-ICU groups) and 14 healthy controls.
- Enzyme-linked immunosorbent assay (ELISA) kits were used to quantify serum concentrations of IFN-λ1 and IFN-λ2.
Main Results:
- Non-ICU COVID-19 patients exhibited significantly higher serum levels of IFN-λ1 and IFN-λ2 compared to ICU patients and healthy controls.
- No significant difference in IFN-λ levels was observed between ICU patients and healthy controls.
- Elevated IFN-λ levels in non-ICU patients suggest a correlation with less severe clinical manifestations.
Conclusions:
- Higher serum concentrations of type III interferons (IFN-λs) are associated with milder COVID-19.
- IFN-λs may represent a promising therapeutic strategy to mitigate severe outcomes of COVID-19.
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