Ongoing pain in the MIA model of osteoarthritis.
Ongoing pain in the MIA model of osteoarthritis.
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DOI:
10.1016/j.neulet.2011.01.027
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发表时间:
2011-04-15
影响因子:
2.5
通讯作者:
Porreca F
中科院分区:
文献类型:
--
作者:
Liu P;Okun A;Ren J;Guo RC;Ossipov MH;Xie J;King T;Porreca F
Osteoarthritis (OA) isa chronic pain condition characterized by pain during joint useas well aspain at rest (i.e., ongoing pain). Although injection of monosodium iodoacetate (MIA)into the intra-articular space of the rodent knee is a well established model of OA pain that is characterized by changes in weight bearing and hypersensitivity to tactile and thermal stimuli, it is not known if this procedure elicits ongoing pain. Further, the time-course and possible underlying mechanisms of these components of pain remain poorly understood. In these studies, we demonstrated the presence ofongoing painin addition to changes in weight bearing and evoked hypersensitivity. Twenty-eight days following MIA injection, spinal clonidine blockedchanges in weight bearing and thermal hypersensitivityand produced place preference indicating that MIA induces ongoing and evoked pain.These findings demonstrate the presence of ongoing pain in this model that is present at a late-time point after MIA allowing for mechanistic investigation.
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