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AMPK phosphorylation modulates pain by activation of NLRP3 inflammasome

AutorBullón, Pedro; Alcocer-Gómez, Elísabet; Carrión Rodríguez, Ángel Manuel ; Marín-Aguilar, Fabiola; Garrido-Maraver, Juan; Román-Malo, Lourdes; Battino, Maurizio; Sánchez-Alcázar, José Antonio ; Cordero, Mario D.
Fecha de publicación2016
EditorMary Ann Liebert
CitaciónAntioxidants and Redox Signaling 24(3): 157-170 (2016)
Resumen[Aims]: Impairment in adenosine monophosphate-activated protein kinase (AMPK) activity and NOD-like receptor family, pyrin domain containing 3 (NLRP3) inflammasome activation are associated with several metabolic and inflammatory diseases. In this study, we investigated the role of AMPK/NLRP3 inflammasome axis in the molecular mechanism underlying pain perception. [Results]: Impairment in AMPK activation induced by compound C or sunitinib, two AMPK inhibitors, provoked hyperalgesia in mice (p<0.001) associated with marked NLRP3 inflammasome protein activation and increased serum levels of interleukin-1β (IL-1β) (24.56±0.82 pg/ml) and IL-18 (23.83±1.882 pg/ml) compared with vehicle groups (IL-1β: 8.15±0.44; IL-18: 4.92±0.4). This effect was rescued by increasing AMPK phosphorylation via metformin treatment (p<0.001), caloric restriction diet (p<0.001), or NLRP3 inflammasome genetic inactivation using NLRP3 knockout (nlrp3) mice (p<0.001). Deficient AMPK activation and overactivation of NLRP3 inflammasome axis were also observed in blood cells from patients with fibromyalgia (FM), a prevalent human chronic pain disease. In addition, metformin treatment (200 mg/daily), which increased AMPK activation, restored all biochemical alterations examined by us in blood cells and significantly improved clinical symptoms, such as, pain, fatigue, depression, disturbed sleep, and tender points, in patients with FM. [Innovation and Conclusions]: These data suggest that AMPK/NLRP3 inflammasome axis participates in chronic pain and that NLRP3 inflammasome inhibition by AMPK modulation may be a novel therapeutic target to fight against chronic pain and inflammatory diseases as FM. Antioxid. Redox Signal. 24, 157-170.
Descripciónet al.
URIhttp://hdl.handle.net/10261/163157
Identificadoresdoi: 10.1089/ars.2014.6120
e-issn: 1557-7716
issn: 1523-0864
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