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Vimentin regulates mitochondrial ROS production and inflammatory responses of neutrophils. | LitMetric

AI Article Synopsis

  • Vimentin, an intermediate filament in immune cells, plays a complex role in neutrophil functions, affecting cytokine production, phagocytosis, and reactive oxygen species (ROS) levels.
  • In a study using an immortalized neutrophil model, researchers found that vimentin limits proinflammatory responses and enhances phagocytosis but is not required for processes like NET formation or degranulation.
  • Gene expression analysis revealed that vimentin impacts mitochondrial function and ROS production, suggesting it regulates neutrophil antimicrobial activities through mitochondrial activity modulation.

Article Abstract

The intermediate filament vimentin is present in immune cells and is implicated in proinflammatory immune responses. Whether and how it supports antimicrobial activities of neutrophils is not well established. Here, we developed an immortalized neutrophil model to examine the requirement of vimentin. We demonstrate that vimentin restricts the production of proinflammatory cytokines and reactive oxygen species (ROS), but enhances phagocytosis and swarming. We observe that vimentin is dispensable for neutrophil extracellular trap (NET) formation, degranulation, and inflammasome activation. Moreover, gene expression analysis demonstrated that the presence of vimentin was associated with changes in expression of multiple genes required for mitochondrial function and ROS overproduction. Treatment of wild-type cells with rotenone, an inhibitor for complex I of the electron transport chain, increases the ROS levels. Likewise, treatment with mitoTEMPO, a SOD mimetic, rescues the ROS production in cells lacking vimentin. Together, these data show vimentin regulates neutrophil antimicrobial functions and alters ROS levels through regulation of mitochondrial activity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11042233PMC
http://dx.doi.org/10.1101/2024.04.11.589146DOI Listing

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