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- W2323271314 abstract "Neuroinflammation triggered by macrophage infiltration into sites of peripheral nerve injury may result in neuropathic pain. Peroxisome proliferator-activated receptor (PPAR)γ signaling regulates the properties of macrophages. However, the macrophage-mediated effects of PPARγ signaling on neuropathic pain triggered by peripheral inflammation have not been investigated.To evaluate the peripheral effects of PPARγ signaling on tactile allodynia, we administered the blood-brain barrier-impermeant PPARγ agonist, rosiglitazone, after partial sciatic nerve ligation (PSNL) as (1) systemic treatment during different phases of neuropathic pain development, (2) local injection to the PSNL site in the early phase, or (3) peritoneal macrophages pretreated with rosiglitazone transplanted into the PSNL site. In addition, the direct effect of rosiglitazone was evaluated in peritoneal macrophages activated with interferon-γ.Systemic rosiglitazone treatment early in the course of progressive inflammation ameliorated tactile allodynia, macrophage infiltration, and production of proinflammatory mediators including cyclooxygenase-2, inducible nitric oxide synthase, and matrix metalloprotease 9 at the PSNL site. Local injection of rosiglitazone and transplantation of rosiglitazone-treated peritoneal macrophages at the ligation site significantly improved tactile allodynia. In peritoneal macrophages, rosiglitazone down-regulated interferon-γ-induced gene expression of cyclooxygenase-2 and inducible nitric oxide synthase and attenuated the chemotactic response to monocyte chemotactic protein-1.Rosiglitazone treatment in the early phase of neuropathic pain significantly alleviated the development of tactile allodynia by regulating macrophage infiltration and production of proinflammatory molecules at the inflamed site. Our results indicate that the activation of PPARγ signaling in macrophages during the early phase may suppress neuropathic pain development." @default.
- W2323271314 created "2016-06-24" @default.
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- W2323271314 date "2011-08-01" @default.
- W2323271314 modified "2023-10-16" @default.
- W2323271314 title "The Macrophage-Mediated Effects of the Peroxisome Proliferator-Activated Receptor-Gamma Agonist Rosiglitazone Attenuate Tactile Allodynia in the Early Phase of Neuropathic Pain Development" @default.
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- W2323271314 doi "https://doi.org/10.1213/ane.0b013e31821b220c" @default.
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