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Chronic use of tramadol after acute pain episode: cohort study.

To determine the risk of prolonged opioid use in patients receiving tramadol compared with other short acting opioids.

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Effects of intensity of electroacupuncture on chronic pain in patients with knee osteoarthritis: a randomized controlled trial.

Conditioned pain modulation (CPM) is impaired in people with chronic pain such as knee osteoarthritis (KOA). The purpose of this randomized, controlled clinical trial was to investigate whether strong electroacupuncture (EA) was more effective on chronic pain by strengthening the CPM function than weak EA or sham EA in patients with KOA.

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Erenumab in chronic migraine with medication overuse: Subgroup analysis of a randomized trial.

To determine the effect of erenumab, a human anti-calcitonin gene-related peptide receptor monoclonal antibody, in patients with chronic migraine and medication overuse.

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PI3K/Akt Signaling Pathway may be involved in MCP-1-induced P2X4R Expression in cultured microglia and Cancer-induced Bone Pain Rats.

P2X4 receptor (P2X4R), a subtype of P2 purinergic receptors, is an ATP-gated receptor through which activity of spinal microglia instigates pain hypersensitivity in various pain conditions. Accumulating evidence indicates that monocyte chemoattractant protein-1 (MCP-1) plays an important role in chronic pain facilitation, and it could stimulate microglia activation and involve in regulating P2X4R expression. However, the mechanism of MCP-1 in regulating the expression of P2X4R in microglia is poorly understood, and whether MCP-1 can aggravate pain via up-regulating spinal P2X4R expression in Cancer-induced Bone Pain (CIBP) remains unclear. In this study, we observed that Iba-1 and P2X4R expression is increased in microglia treated with MCP-1, and blockade with a selective CCR2 antagonist RS-504393 suppressed microglia activation and reduced P2X4R expression in cultured microglia. In response to MCP-1, the expression level of p-Akt was also increased and RS-504393 inhibited the increase. Besides, PI3K inhibitor LY 294002 could attenuate MCP-1-induced P2X4R expression in cultured microglia. MCP-1 was found to be associated with P2X4R expression and mechanical allodynia induced by CIBP in vivo since the expression of MCP-1 was increased in CIBP and RS-504393 alleviated the P2X4R expression and mechanical allodynia in CIBP. Moreover, RS-504393 also reduced the increase of p-Akt induced by CIBP. Inhibition of PI3K/Akt pathway may partly reduce MCP-1/CCR2-induced expression of P2X4R and mechanical allodynia in CIBP rats.

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Effects of microencapsulated olfactory ensheathing cell transplantation on neuropathic pain and P2X7 receptor expression in the L4-5 spinal cord segment.

The aim of this study was to determine the role of microencapsulated olfactory ensheathing cell (MC-OEC) transplantation in rats with sciatic nerve injury-induced pain, and its relationship with P2 × 7 receptor expression in the L4-5 spinal cord segment.

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TRESK background K+ channel deletion selectively uncovers enhanced mechanical and cold sensitivity.

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Traditional and Novel Migraine Therapy in the Aging Population.

Migraine is a common disabling disorder that affects 36 million Americans. The clinical features of migraine are less typical in the people above age 60, making the diagnosis and treatment difficult in this group. In this review, we will discuss migraine-specific drugs and their use in populations about age 60 who suffer from migraine. This discussion will include an overview of traditional treatments for the acute and preventive treatment of migraine, and considerations for their use in patient populations above age 60. In addition, we will discuss newer agents that show a more promising safety profile.

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A role for peripheral GDNF signaling in ischemic myalgia development.

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Inflammatory biomarkers do not distinguish between patients with sciatica and referred leg pain within a primary care population: results from a nested study within the ATLAS cohort.

There is increasing interest in the role of pro-inflammatory cytokines in the pathogenesis of sciatica and whether these could be potential targets for treatment. We sought to investigate serum biomarker levels in patients with low back-related leg pain, including sciatica.

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Telephone cognitive behavioural therapy to prevent the development of chronic widespread pain: a qualitative study of patient perspectives and treatment acceptability.

Telephone cognitive behavioural therapy (tCBT) is an acceptable and effective treatment for patients with chronic widespread pain (CWP). Preventing the onset of CWP offers considerable benefits to the individual and society and the MAmMOTH study is the first aimed at CWP prevention. The study is a two-arm randomised trial testing a course of tCBT against usual care for prevention of CWP. This nested qualitative study explores patients' treatment experiences, with a view to understanding their potential influences on acceptability of the intervention.

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