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Vaccinia Virus Infection & Temporal Analysis of Virus Gene Expression: Part 1
Published on: April 8, 2009
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Spatiotemporal transcriptomics reveals pathogenesis of viral myocarditis.
Madhav Mantri1, Meleana M Hinchman2, David W McKellar1
1Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA.
Nature Cardiovascular Research
|March 27, 2023
Summary
Viral myocarditis, a cause of sudden death, was studied in mice using advanced transcriptomics. Researchers mapped heart inflammation, revealing how endothelial cells recruit T cells and undergo pyroptosis, leading to immune-mediated injury.
Area of Science:
- Cardiovascular Biology
- Immunology
- Virology
Background:
- Viral myocarditis is a significant cause of sudden cardiac death in young individuals.
- Understanding the molecular mechanisms of viral myocarditis is crucial for developing effective treatments.
Purpose of the Study:
- To create a high-resolution, spatially resolved transcriptome map of reovirus-induced myocarditis in neonatal mouse hearts.
- To elucidate the temporal, spatial, and cellular heterogeneity of host-virus interactions during myocarditis development.
Main Methods:
- Integrated single-cell and spatial transcriptomics were employed to analyze mouse heart and intestine tissues at three timepoints post-infection.
- Spatially restricted gene expression analysis was performed on myocarditic regions and border zones.
Main Results:
- A detailed transcriptome map of reovirus-induced myocarditis was generated, highlighting temporal and spatial heterogeneity.
- Inflamed endothelial cells were identified as key players, recruiting cytotoxic T cells and undergoing pyroptosis in affected heart tissue.
- Immune-mediated, cell-type-specific injury and stress responses were observed in myocarditic and border zone regions.
Conclusions:
- This study provides a comprehensive molecular and spatial understanding of viral myocarditis pathogenesis.
- The findings reveal critical cellular interactions and host-virus dynamics contributing to heart inflammation and injury.
- The research offers insights into potential therapeutic targets for viral myocarditis.
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