ArticlebioRxiv : the preprint server for biology2024
Obesity-Associated Changes in Immune Cell Dynamics During Alphavirus Infection Revealed by Single Cell Transcriptomic Analysis.
Article in bioRxiv : the preprint server for biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Obesity induces diverse changes in host immunity, resulting in worse disease outcomes following infection with various pathogens, including arthritogenic alphaviruses. However, the impact of obesity on the functional landscape of immune cells during arthritogenic alphavirus infection remains unexplored. Here, we used single-cell RNA sequencing (scRNA-seq) to dissect the blood and tissue immune responses to Mayaro virus (MAYV) infection in lean and obese mice. Footpad injection of MAYV caused significant shifts in immune cell populations and induced robust expression of interferon response and proinflammatory cytokine genes and related pathways in both blood and tissue. In MAYV-infected lean mice, analysis of the local tissue response revealed a unique macrophage subset with high expression of IFN response genes that was not found in obese mice. This was associated with less severe inflammation in lean mice. These results provide evidence for a unique macrophage population that may contribute to the superior capacity of lean mice to control arthritogenic alphavirus infection.
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