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Updated: Sep 20, 2025

Author Spotlight: Unveiling the Polyfunctionality and Heterogeneity in Immune Responses
Published on: March 8, 2024
[Fibrinolytic factors: novel molecular targets for cytokine storm-associated diseases]
Koichi Hattori1,2, Hiroshi Shimazu3, Satoshi Takahashi4
1Center for Genomic & Regenerative Medicine, Juntendo University Graduate School of Medicine.
Insights
Understanding the cytokine storm in severe COVID-19 reveals the fibrinolytic system
Area of Science:
- Immunology
- Pathophysiology
- Vascular Biology
Background:
- The severe coronavirus disease 2019 (COVID-19) has caused millions of deaths globally.
- The "cytokine storm," driven by the coagulation/fibrinolytic system, significantly contributes to COVID-19 pathology.
- Endothelial cells play a crucial role in modulating inflammatory and coagulation factors.
Purpose of the Study:
- To elucidate the role of the fibrinolytic system in inflammatory diseases, particularly COVID-19.
- To explore potential therapeutic targets within the angiocrine and fibrinolytic systems for managing inflammatory conditions.
Main Methods:
- Review of existing research on the pathophysiology of COVID-19.
- Focus on the mechanisms of the cytokine storm and vascular endothelial damage.
- Analysis of the fibrinolytic system's involvement in inflammatory disease progression.
Main Results:
- The coagulation/fibrinolytic system is central to the "cytokine storm" observed in severe COVID-19.
- Vascular endothelial damage destabilizes the angiocrine system, exacerbating inflammation.
- Imbalanced angiocrine factors and cytokines are key contributors to COVID-19 complications.
Conclusions:
- The fibrinolytic system is a significant factor in the pathophysiology of inflammatory diseases like COVID-19.
- Targeting angiocrine and fibrinolytic factors presents a promising avenue for novel therapeutic strategies.
- Further research into these pathways could lead to effective treatments for severe COVID-19 and related inflammatory conditions.
Abstract:
The mortality rate due to coronavirus disease 2019 (COVID-19) reached 5.3 million. However, identifying the novel treatment targets that ultimately reduce or prevent disease aggravation will be possible by understanding the mechanism and pathophysiology underlying the COVID-19 aggravation. Authors of previous studies have identified the "cytokine storm" that constitutes the secretion of inflammatory cytokines driven by the coagulation/fibrinolytic system as an inflammatory cytodynamic control mechanism that contributes to the aggravated COVID-19 pathology and the pathophysiology of related diseases. Vasculature-lining endothelial cells are bioreactors that produce or contribute to the modulation status of cytokines and coagulation and fibrinolytic system factors. The key steps in the pathophysiology of organ damage include the destabilization of the angiocrine system triggered by vascular endothelial damage during severe COVID-19. Overproduced or imbalanced angiocrine factors and inflammatory cytokines contribute to major COVID-19 complications. Within its scope, this study outlines the significance of the fibrinolytic system in the pathophysiology of inflammatory diseases, focusing on the research results. The possibility of molecular that target these angiocrine and fibrinolytic factors for inflammatory diseases as novel treatment approaches for inflammatory diseases, such as COVID-19, was discussed.
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