European journal of pain : EJP
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The objective was to evaluate a supposed clinical interdependency of myofascial trigger points and migraine in children. Such interdependency would support an interaction of spinal and trigeminal afferences in the trigemino-cervical complex as a contributing factor in migraine. ⋯ In children with migraine headache can often be induced by pressure to myofascial trigger points, but not by pressure to non-trigger points in the trapezius muscle. This supports the hypothesis of a trigemino-cervical-complex in the pathophysiology of migraine, which might have implications for innovative therapies in children with migraine.
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Review
Assessment and manifestation of central sensitisation across different chronic pain conditions.
Different neuroplastic processes can occur along the nociceptive pathways and may be important in the transition from acute to chronic pain and for diagnosis and development of optimal management strategies. The neuroplastic processes may result in gain (sensitisation) or loss (desensitisation) of function in relation to the incoming nociceptive signals. Such processes play important roles in chronic pain, and although the clinical manifestations differ across condition processes, they share some common mechanistic features. ⋯ The aims of this paper are to introduce and discuss (1) some common fundamental central pain mechanisms, (2) how they may translate into the clinical signs and symptoms across different chronic pain conditions, (3) how to evaluate gain and loss of function using quantitative pain assessment tools, and (4) the implications for optimising prevention and management of pain. The chronic pain conditions selected for the paper are neuropathic pain in general, musculoskeletal pain (chronic low back pain and osteoarthritic pain in particular), and visceral pain (irritable bowel syndrome in particular). The translational mechanisms addressed are local and widespread sensitisation, central summation, and descending pain modulation.
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Following nerve injury, down-regulation of astroglial glutamate transporters (GluTs) with subsequent extracellular glutamate accumulation is a key factor contributing to hyperexcitability within the spinal dorsal horn. Some β-lactam antibiotics can up-regulate GluTs, one of which, ceftriaxone, displays analgesic effects in rodent chronic pain models. ⋯ Chronic dosing of clavulanic acid alleviates neuropathic pain in rats and up-regulates glutamate transporters both in vitro and in vivo. Crucially, a similar up-regulation of glutamate transporters in human spinal astrocytes by clavulanic acid supports the development of novel β-lactam-based analgesics, devoid of antibacterial activity, for the clinical treatment of chronic pain.
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Review Meta Analysis
Efficacy, acceptability and safety of cognitive behavioural therapies in fibromyalgia syndrome - A systematic review and meta-analysis of randomized controlled trials.
This updated systematic review aimed at evaluating the efficacy, acceptability and safety of cognitive behavioural therapies (CBTs) in fibromyalgia syndrome (FMS). Clinicaltrials.gov, Cochrane Library, MEDLINE, PsycINFO and SCOPUS were searched from September 2013 to May 2017. Randomized controlled trials (RCTs) comparing CBTs with controls were analysed. Primary outcomes were ≥50% pain relief, ≥20% improvement of health-related quality of life (HRQoL), negative mood, fatigue, disability, acceptability and safety at end of therapy and at 6 months follow-up. Effects were summarized by a random effects model using risk differences (RD) or standardized mean differences (SMD) with 95% confidence intervals (CI). 29 RCTs with 2509 subjects were included. CBTs were superior to controls (waiting list, attention control, treatment as usual, other active non-pharmacological therapies) in pain relief of 50% or greater (RD 0.05 [95% CI 0.02-0.07] (high-quality evidence), improvement of HRQoL of 20% or greater (RD 0.13 [95% CI 0.00-0.26], (moderate quality evidence), and in reducing negative mood (SMD -0.43 [95% CI -0.62 to -0.24]) (high-quality evidence), disability (SMD -0.30 [95% CI -0.52 to -0.08]) (high-quality evidence) and fatigue (SMD - 0-27 [95% CI -0.50 to -0.03]) (high-quality evidence). There were no statistically significant differences between CBTs and controls in acceptability and safety (high-quality evidence). The update did not change the major findings of the previous review. CBTs provided a clinically relevant benefit over control interventions in reducing some key symptoms of FMS and disability at the end of treatment. ⋯ This updated systematic review with meta-analysis on cognitive behavioural therapies (CBTs) including acceptance-based CBTs endorse the efficacy and tolerability of CBTs in reducing key symptoms and disability in FMS in the short- and long-term if compared to waiting list, treatment as usual, attention controls and active non-pharmacological therapies. CBTs did not differ in efficacy except superiority for coping with pain and tolerability from recommended drug therapy (pregabalin and/or duloxetine).
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Review
The research gap in chronic paediatric pain: A systematic review of randomised controlled trials.
Chronic pain is associated with significant functional and social impairment. The objective of this review was to assess the characteristics and quality of randomized controlled trials (RCTs) evaluating pain management interventions in children and adolescents with chronic pain. ⋯ There is a substantial research gap regarding analgesic interventions for children and adolescents with chronic pain. Most clinical trials in the field focus on the evaluation of non-pharmacological interventions and are of low methodological quality. There is also a specific lack of trials involving infants and children and adolescents with long-lasting diseases.