{"id":1387,"date":"2026-03-15T10:46:18","date_gmt":"2026-03-15T10:46:18","guid":{"rendered":"https:\/\/perfusfind.com\/ic\/?p=1387"},"modified":"2026-03-15T10:46:18","modified_gmt":"2026-03-15T10:46:18","slug":"crosstalk-between-lung-and-extrapulmonary-organs-in-sepsis-related-acute-lung-injury-acute-respiratory-distress-syndrome","status":"publish","type":"post","link":"https:\/\/perfusfind.com\/ic\/index.php\/2026\/03\/15\/crosstalk-between-lung-and-extrapulmonary-organs-in-sepsis-related-acute-lung-injury-acute-respiratory-distress-syndrome\/","title":{"rendered":"Crosstalk between lung and extrapulmonary organs in sepsis-related acute lung injury\/acute respiratory distress syndrome"},"content":{"rendered":"

Organ Crosstalk in Sepsis-Related ALI\/ARDS: New Insights into Lung\u2013System Interactions<\/p>\n

Abstract:<\/strong> Sepsis-related ALI\/ARDS remains highly lethal (>30% mortality), and most research has historically focused only on the lung. This review highlights organ crosstalk<\/strong> as a central mechanism in sepsis pathophysiology. The authors differentiate pulmonary sepsis-associated ALI\/ARDS (PSA)<\/strong> from extrapulmonary sepsis-associated ALI\/ARDS (ESA)<\/strong>, outline systemic inflammation, microbiome dynamics, and cell-death cascades, and emphasize extracellular vesicles (EVs)<\/strong> as key mediators and potential therapeutic targets.<\/p>\n

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Key Insights<\/h3>\n
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  1. PSA vs ESA distinctions:<\/strong> PSA arises from lung infections, leading to epithelial injury and consolidation, while ESA results from extrapulmonary infections, causing endothelial injury, interstitial changes, and ground-glass opacities.<\/li>\n
  2. Systemic inflammation:<\/strong> Shared mechanism involves cytokines (TNF-\u03b1, IL-6), endothelial activation, coagulation, microthrombosis, and hypoperfusion; but organ-specific responses (liver detoxification loss, neuroendocrine signaling, splenic cytokine release) amplify crosstalk.<\/li>\n
  3. Microbiome roles:<\/strong> Dysbiosis and barrier failure enable gut\u2013lung microbial translocation, while lung microbiota can affect the brain and distant organs. Metabolites (e.g., butyrate, LPS) regulate immunity and barrier integrity.<\/li>\n
  4. Cascade of cell injury:<\/strong> Cell death modes (necrosis, necroptosis, apoptosis, pyroptosis, NETosis) propagate damage across organs via EVs, ROS, and DAMPs. Domino-like injury cascades may explain multi-organ persistence post-sepsis.<\/li>\n
  5. Lung\u2013brain axis:<\/strong> BBB disruption, microbial translocation, microglia activation, and TRPV1+ sensory neurons mediate neurological complications post-ARDS, including depression and cognitive decline.<\/li>\n
  6. Lung\u2013kidney axis:<\/strong> Pneumonia can induce AKI via platelet-mediated injury; mechanical ventilation increases AKI risk through hemodynamics and inflammation. Conversely, AKI triggers osteopontin-CD44 signaling, damaging lung endothelium.<\/li>\n
  7. Lung\u2013gut axis:<\/strong> Pneumonia induces gut epithelial apoptosis and barrier dysfunction, which in turn worsens pulmonary inflammation through bacterial translocation and reduced Tregs\/SCFAs.<\/li>\n
  8. Lung\u2013liver axis:<\/strong> Viral invasion, Kupffer cell dysfunction, and acute-phase protein release enhance systemic inflammation; dysregulated hepatopulmonary signaling aggravates ALI\/ARDS.<\/li>\n
  9. Lung\u2013heart axis:<\/strong> Pathogens can directly invade myocardium; inflammation and mitochondrial dysfunction drive cardiopulmonary injury.<\/li>\n
  10. Extracellular vesicles (EVs):<\/strong> EVs mediate immunity, barrier dysfunction, metabolism, and coagulation in crosstalk. Higher circulating EVs correlate with sepsis severity and mortality, highlighting their promise as biomarkers and therapeutic targets.<\/li>\n<\/ol>\n

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    Why This Matters<\/h3>\n

    Viewing sepsis-related ALI\/ARDS through the lens of multi-organ communication<\/strong> shifts the paradigm from isolated lung injury to systemic interplay. This could open doors for multi-targeted therapies<\/strong>\u2014not just ventilatory or anti-inflammatory interventions, but microbiome modulation, EV-targeting, and organ-protective strategies.<\/p>\n

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    Conclusion<\/h3>\n

    Crosstalk between the lungs and other organs is central to sepsis-related ALI\/ARDS. While challenges remain\u2014heterogeneity, limited animal models, and trial feasibility\u2014emerging omics, organ-on-chip systems, and 3D organoids<\/strong> promise better mechanistic insights and future therapeutic breakthroughs.<\/p>\n

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    Take-Home for Clinicians<\/h3>\n