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Pyridin-2(1H)one derivatives: A possible new class of therapeutics for mechanical allodynia

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Visseq, Alexia | Descheemaeker, Amélie | Pinto-Pardo, Nicolas | Nauton, Lionel | Thery, Vincent | Giraud, Francis | Abrunhosa-Thomas, Isabelle | Artola, Alain | Anizon, Fabrice | Dallel, Radhouane | Moreau, Pascale

Edité par CCSD ; Elsevier -

International audience. Mechanical Allodynia (MA), a frequent chronic pain symptom caused by innocuous stimuli, constitutes an unmet medical need, as treatments using analgesics available today are not always effective and can be associated with important side-effects. A series of 3,5-disubstituted pyridin-2(1H)-ones was designed, synthesized and evaluated in vivo toward a rat model of inflammatory MA. We found that the series rapidly and strongly prevented the development of MA. 3-(2-Bromophenyl)-5-(phenylamino)pyridin-2(1H)-one 69, the most active compound of the series, was also able to quickly reverse neuropathic MA in rats. Next, when 69 was evaluated toward a panel of 50 protein kinases (PK) in order to identify its potential biological target(s), we found that 69 is a p38a MAPK inhibitor, a PK known to contribute to pain hypersensitivity in animal models. 3,5-Disubstituted pyridin-2(1H)-ones thus could represent a novel class of analgesic for the treatment of MA.

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