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Partial nerve injury leads to peripheral neuropathic pain. This injury results in conducting/uninterrupted (also called uninjured) sensory fibres, conducting through the damaged nerve alongside axotomised/degenerating fibres. In rats seven days after L5 spinal nerve axotomy (SNA) or modified-SNA (added loose-ligation of L4 spinal nerve with neuroinflammation-inducing chromic-gut), we investigated...
In order to clarify the physiologic role of NPY in sensory processing, we obtained intracellular recordings of DRG neurons from wild type (WT) and NPY overexpressing transgenic rats (NPY-TG) before and after injury. We investigated medium and large diameter DRG neurons since upregulation of NPY peptide following the nerve injury occurs primarily in those cells. Neurons were classified as Aα/β and...
Our previous studies revealed that interleukin-2 (IL-2) exerted peripheral antinociception that was partially mediated by μ opioid receptors. No ionic explanations of this effect have yet been reported. The present study was designed to investigate effects of IL-2 on the physiological properties of capsaicin-sensitive small dorsal root ganglion (DRG) neurons, which are predominantly responsible for...
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