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A High-Throughput Multiplexed Screening for Type 1 Diabetes, Celiac Diseases, and COVID-19
Published on: July 5, 2022
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Bidirectional causal associations between type 2 diabetes and COVID-19
Hongbao Cao1, Ancha Baranova1,2, Xuejuan Wei3
1School of Systems Biology, George Mason University, Manassas, Virginia, USA.
Journal of Medical Virology
|August 27, 2022
Summary
Type 2 diabetes (T2D) causally increases the risk for severe COVID-19 outcomes, including hospitalization and critical illness. Conversely, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection liability may increase the risk for developing T2D.
Area of Science:
- Genetics
- Epidemiology
- Immunology
Background:
- Observational studies suggest a strong link between type 2 diabetes (T2D) and severe COVID-19.
- The causal relationship between T2D and COVID-19 requires further validation.
Purpose of the Study:
- To investigate the bidirectional causal associations between T2D and COVID-19 using genetic analyses.
- To explore potential molecular mechanisms linking T2D and COVID-19 severity.
Main Methods:
- Genetic correlation analyses were performed to assess genetic overlap between T2D and COVID-19 outcomes.
- Mendelian randomization (MR) analyses were employed to infer causal effects.
- Molecular pathway analysis was used to identify mediating genes.
Main Results:
- Significant genetic overlap was found between T2D and severe COVID-19 outcomes (genetic correlations 0.21-0.28).
- MR analyses revealed that genetic liability to T2D causally increases the risk for COVID-19 hospitalization and critical illness.
- Genetic liability to SARS-CoV-2 infection showed a causal effect on T2D risk, with suggestive evidence for bidirectional associations.
Conclusions:
- This study provides robust evidence for bidirectional causal links between T2D and COVID-19.
- T2D may exacerbate COVID-19 severity, while COVID-19 infection liability might increase T2D risk.
- Immunity-related genes may play a role in mediating the molecular connections between T2D and COVID-19.
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