European journal of pain : EJP
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We have recently reported that the spinal angiotensin (Ang) converting enzyme (ACE)/Ang II/AT1 receptor axis and downstream p38 MAPK phosphorylation are activated in streptozotocin (STZ)-induced diabetic mice and lead to tactile hypersensitivity. Moreover, our previous results suggested that the intrathecal (i.t.) administration of Ang (1-7), an N-terminal fragment of Ang II, may attenuate the Ang II-induced nociceptive behaviour through the inhibition of p38 MAPK phosphorylation via Mas receptors. Here, we investigated whether the i.t. administration of Ang (1-7) can attenuate STZ-induced diabetic neuropathic pain. ⋯ The ACE2/Ang (1-7)/Mas receptor axis was down-regulated in the spinal cord of STZ mice and the i.t. administration of Ang (1-7) attenuated the STZ-induced diabetic neuropathic pain via Mas receptors. Therefore, the activation of this axis could be an effective therapeutic target to alleviate the neuropathic pain in diabetic patients.
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Over the last decades, consumption of opioids for the treatment of pain increased steadily in the United States, Australia, and a few European countries. To date, no study has analysed time trends in opioid consumption across Europe. ⋯ This study provides an updated and comprehensive analysis of time trends and geographic variations in opioid consumption use across European countries over the last three decades.
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Review
Body movements as pain indicators in older people with cognitive impairment: A systematic review.
Pain assessment tools for cognitively impaired older people, unable to self-report pain, are commonly founded upon observation of pain behaviour, such as facial expressions, vocalizations and body movements. The scientific basis for claiming that body movements may indicate pain has not formerly been investigated in a systematic review. The objective was to explore research evidence for body movements being pain indicators in older people with cognitive impairment. ⋯ Pain assessment tools for older people with cognitive impairment or dementia should include valid pain behaviour items. Our review shows strong scientific evidence for the following body movements indicating pain: restlessness (agitation), rubbing, guarding, rigidity and physical aggression.
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Randomized Controlled Trial Comparative Study
The relative efficacy of mindfulness versus distraction: The moderating role of attentional bias.
This study investigated whether the ability to disengage quickly from pain-related stimuli moderated the relative efficacy of a mindfulness-based intervention versus distraction in response to an experimental pain task. ⋯ This study demonstrated the efficacy of a novel, exposure-based mindfulness technique for pain tolerance and showed that those who disengaged easily from pain stimuli benefited most. This brief task could be clinically useful, particularly for those who are not overly focused on their pain symptoms.
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Pain expectancies are associated with altered pain sensitivity in individuals with chronic pain. However, little is known about the processes by which pain expectancies impact pain processing. This study assessed the association between pain expectancies and temporal summation (TS) of pain, and examined whether pain catastrophizing mediated this association. ⋯ Individuals with chronic low back pain who expect higher levels of pain and catastrophize about their pain are more likely to experience altered pain sensitivity. Our results point to catastrophizing as a mechanism of action through which psychological factors may operate and lead to the development and maintenance of chronic low back pain.