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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Spinal nerve ligation induces transient upregulation of tumor necrosis factor receptors 1 and 2 in injured and adjacent uninjured dorsal root ganglia in the rat.

Evidence indicates a role for tumor necrosis factor-alpha (TNF) in neuropathic pain. We correlated pain behavior in response to mechanical stimulation with immunoreactivity for TNF receptor (TNFR) 1 and 2 at 6, 24, 76 and 120 h following L5 and L6 spinal nerve ligation (SNL). Allodynia began in both L4 and L5 dermatomes within 6 h following SNL, peaking by 24 h. In L5 (injured) dorsal root ganglia (DRG), TNFR1 and TNFR2 levels displayed a bimodal increase, peaking at 6 and 120 h after SNL. In L4 (uninjured) DRG, TNFR1 and TNFR2 immunoreactivity peaked at 24 h returning to basal levels by 120 h. TNFR upregulation in injured and adjacent uninjured DRG neurons may be essential for mediating enhanced TNF effects and thus contribute to the development of pain-related behavior.[1]

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