ArticleFrontiers in molecular neuroscience2025
Endoglin alleviates neuropathic pain by protecting the blood-spinal cord barrier through the TGF-β/Smad2 signaling pathway.
Article in Frontiers in molecular neuroscience, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Not yet cited in PubMed.
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11 authors.
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Abstract
Introduction: Central neuroinflammation is pivotal in neuropathic pain pathogenesis, with blood-spinal cord barrier (BSCB) dysfunction recognized as a trigger for neuroinflammation and pain, though molecular mechanisms remain poorly understood. Methods: Through comparative clinical studies measuring serum endoglin in postherpetic neuralgia (PHN) patients versus healthy controls, and animal investigations using spared nerve injury (SNI) rat models with recombinant endoglin intervention, we assessed mechanical/thermal hyperalgesia, microglial activation, inflammatory cytokines, BSCB permeability, and TGF-βRI/Smad2/NR2B phosphorylation. Results: PHN patients exhibited lower serum endoglin versus controls; SNI rats showed reduced spinal endoglin compared to sham controls. Recombinant endoglin alleviated hyperalgesia while reversing microglial activation, inflammation, BSCB impairment, and NR2B phosphorylation. SNI decreased spinal TGF-βRI expression and Smad2 phosphorylation. Discussion: These findings demonstrate that endoglin reduction disrupts BSCB integrity via TGF-β/Smad2 pathway inhibition in endothelial cells, driving microglial activation, neuroinflammation, and NR2B phosphorylation, thereby elucidating a key pain mechanism and identifying endoglin as a therapeutic target.
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