ArticleRespiratory research2026
Targeting inflammation and coagulation: MMP-9 deficiency exacerbates sepsis induced acute lung injury through fibrinogen-driven inflammation.
Article in Respiratory research, 2026. 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
Sepsis is caused by a dysregulated host response to infection, characterized by multiorgan failure in which the lung is the primary target. Although matrix metalloproteinase-9 (MMP9), a macrophage-derived protease, is known to degrade extracellular matrix proteins during inflammation, its specific role in sepsis-induced lung injury (SALI) remains to be elucidated. This study elucidates the protective function of MMP9 in SALI and validated its translational potential as an early diagnostic biomarker that integrates coagulation-inflammation crosstalk. First, we integrated human blood bulk RNA-seq data and an in-house LPS-induced murine ALI model to extract coagulation-related sepsis DEGs (Cos-Gs), constructed a PPI network, and applied two-sample Mendelian randomization (MR), which identified MMP9 as a causal protection gene. Additionally, we performed molecular docking using the ZDOCK server and 100 ns molecular dynamics simulations with Gromacs to explore the interaction between MMP9 and fibrinogen. Next, in vivo studies using CLP-operated MMP9
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