Intestinal barrier compromise, viral persistence, and immune dysregulation converge on neurological sequelae in Long COVID
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ID: 310011
2026
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Abstract
Long COVID (LC) is a multisystem, post-infectious conditions diagnosed ≥3 months after acute SARS-CoV-2 infection and marked by relapsing, persistent, or progressive symptoms, especially fatigue, post-exertional symptom exacerbation and neuropsychiatric syndromes. We synthesized evidence suggesting that LC arises from intersecting pathways including viral persistence, intestinal dysbiosis and barrier compromise with microbial translocation, innate immune activation with neutrophil extracellular traps (NET) and thromboinflammation, and immune dysregulation with features of exhaustion and autoimmunity. These processes adversely impact blood-brain barrier (BBB) function and lead to neuroinflammation. We propose a mechanistic model in which viral antigens and translocated microbial products amplify pro-inflammatory networks promoting immunothrombosis and tissue hypoperfusion. Hematogenous and gut-brain pathways may then deliver inflammatory mediators to the central nervous system (CNS), resulting in BBB disruption and glial activation that underpin nervous system disorders in LC. Treatment regimens aimed at lowering antigen load, restoring mucosal barrier integrity and modulating myeloid/coagulation pathways may warrant investigation as novel therapeutic strategies to treat LC.
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imported_1768911300_696f71c4938d1
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| Authors | Falcone, Emilia Liana |
| Journal | Frontiers in surgery |
| Year | 2026 |
| DOI |
10.3389/fnagi.2025.1744415
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| URL | |
| Keywords | Keywords not found |
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