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The selection of outcome criteria for chronic pain, both the domain of measurement and the magnitude of change, in RCTs is largely determined by the investigators. The present study investigated patient-determined criteria for the magnitude of change necessary to achieve an ‘acceptable outcome’ (endpoint) on the brief pain inventory and two subscales of the multidimensional pain inventory. Seventy-eight...
Surgery injures both skin and deep tissue causing pain at rest and evoked pain with activities. In this study, we examined the extent of injury by incision and dorsal horn neuron (DHN) spontaneous activity (SA) in rats that underwent a sham operation, skin incision or skin plus deep tissue incision. Pain behaviors were measured 1day later followed by DHN recordings in the same rats. On postoperative...
It is widely appreciated that there is significant inter-individual variability in pain sensitivity, yet only a handful of contributing genetic variants have been identified. Computational genetic mapping and quantitative trait locus analysis suggested that variation within the gene coding for the β 3 subunit of the Na + ,K + -ATPase pump (Atp1b3) contributes to inter-strain...
The mechanisms underlying trigeminal pain conditions are incompletely understood. In vitro animal studies have elucidated various targets for pharmacological intervention; however, a lack of clinical models that allow evaluation of viable innervated human tissue has impeded successful translation of many preclinical findings into clinical therapeutics. Therefore, we developed and characterized an...
Spinal long-term potentiation (LTP) elicited by noxious stimulation enhances the responsiveness of dorsal horn nociceptive neurons to their normal input, and may represent a key mechanism of central sensitization by which acute pain could turn into a chronic pain state. This study investigated the electrophysiological and behavioral consequences of the interactions between LTP and descending oxytocinergic...
Neurotoxicity represents a major complication of oxaliplatin. This study aimed to identify early clinical markers of oxaliplatin neurotoxicity, in comparison with cisplatin, and detect predictors of chronic neuropathy. Forty-eight patients with mainly colorectal cancer were evaluated prospectively before oxaliplatin (n=28) or cisplatin (n=20) administration and then 2weeks after the third (C3), sixth...
Tibia fracture in rats initiates a syndrome resembling the complex regional pain syndrome type I. Accumulating evidence indicates that IL-1β is involved in the modulation of nociceptive information and it acts as an intermediate inflammatory mediator via up-regulation of NGF. We hypothesized that IL-1β signaling might mediate the development of the CRPS-like changes after tibial fracture, either directly...
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