ArticleCNS neuroscience & therapeutics2026
Hypoxia Upregulates RIPK1 via the HIF-1α-JAK-STAT Pathway Leading to Astrocyte Necroptosis to Promote Cavitation After Spinal Cord Injury.
Article in CNS neuroscience & therapeutics, 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
backgroundThe pathological mechanisms after spinal cord injury (SCI) are complex, making SCI repair a major clinical challenge for clinical treatment. Currently, there is no effective method to effectively improve the prognosis of patients. A deeper understanding of post-SCI pathology may reveal new targets and strategies for clinical intervention.
methodsA rat SCI model was constructed, and HE staining, immunohistochemistry, and tissue immunofluorescence double staining were used to detect the pathological changes and cell death in injured tissue. Human astrocytes were subjected to hypoxic conditions, and necroptosis and apoptosis mechanisms were investigated using CCK8, immunofluorescence, Western blot, transmission electron microscopy, and related assays.
resultsIn vivo animal experiments demonstrated that after SCI, rats exhibited the formation of damage cavities and increased astrocyte apoptosis in the lesion area, along with significantly elevated expression of key proteins in the HIF-1α pathway and necroptosis. In vitro cellular experiments showed that hypoxia induced the elevation of the expression of key factors of human astrocytes HIF1α and JAK/STAT, necroptosis, and the conversion of the cells to an A1-type phenotype with the use of the necroptosis inhibitors, JAK/STAT inhibitors or knockdown of HIF1α or knockdown of RIP1 expression could reverse the hypoxia-induced effects.
conclusionIn conclusion, hypoxia promotes COI formation after SCI by activating the HIF-1α-JAK-STAT pathway, which in turn leads to necroptosis of astrocytes.
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