Blockade of the Sigma-1 Receptor Relieves Cognitive and Emotional Impairments Associated to Chronic Osteoarthritis Pain

In this study, we evaluated the involvement of sigma-1 receptor (σ1R) on the nociceptive, cognitive and emotional alterations associated with chronic osteoarthritis pain. Monosodium iodoacetate (MIA) was injected into the knee of Swiss-albino CD1 mice to induce osteoarthritis pain, which then received a repeated treatment with the σ1R antagonist E-52862 or its vehicle. Nociceptive responses and motor performance were assessed with the von Frey and the Catwalk gait tests. Cognitive alterations were evaluated using the novel object recognition task, anxiety-like behaviour with the elevated plus maze and the zero-maze tests, whereas depressive-like responses were determined using the forced swimming test. We also studied the local effect of the σ1R antagonist on cartilage degradation, and its central effects on microglial reactivity in the medial prefrontal cortex. MIA induced mechanical allodynia and gait abnormalities that were prevented by the chronic treatment with the σ1R antagonist. E-52862 also reduced the memory impairment and the depressive-like behaviour associated to osteoarthritis pain. Interestingly, the effect of E-52862 on depressive-like behaviour was not accompanied by a modification of anxiety-like behaviour. The pain-relieving effects of the σ1R antagonist were not due to a local effect on the articular cartilage, since E-52862 treatment did not modify the histological alterations of the knee joints. However, E-52862 induced centr...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research

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Conclusion: These findings support the hypothesis that in FM a deteriorated function of cortical inhibition, indexed by a higher SICI parameter, a lower function of the DPMS, together with a higher level of BDNF indicate that FM has different pathological substrates from depression. They suggest that an up-regulation phenomenon of intracortical inhibitory networks associated with a disruption of the DPMS function occurs in FM. Introduction Major depressive disorder (MDD) and fibromyalgia (FM) present overlapped symptoms. Although the connection between these two disorders has not been elucidated yet, the disruption...
Source: Frontiers in Human Neuroscience - Category: Neuroscience Source Type: research
ConclusionsOur patient showed dramatic improvements to her quality of life and symptoms of osteoarthritis were reduced. Interestingly, along with improvements in her knee and hips her other comorbidities such as ankylosing spondylitis, depression, anxiety, and fatigue exhibited marked improvement. She ceased the use of a wheelchair and walking support and, with increased mobility, had gained independence. These findings are suggestive of the therapeutic effects of stromal vascular fraction.
Source: Journal of Medical Case Reports - Category: General Medicine Source Type: research
In this study, the “tailored” group underwent seven days of monitoring using an accelerometer, the results were downloaded, analysed and an individualised pacing plan developed by the therapists. The plan was intended to highlight times when the person had high or low levels of activity (as compared with their own average, and averages drawn from previous studies of people with the same diagnosis), and to point out associations between these activity levels and self reported symptoms. Participants were then provided with ideas for changing their activity levels to optimise their ability to sustain activity and ...
Source: HealthSkills Weblog - Category: Anesthesiology Authors: Tags: 'Pacing' or Quota Chronic pain Clinical reasoning Coping Skills Coping strategies Occupational therapy Pain conditions Research function Motivation pain management self management Therapeutic approaches values Source Type: blogs
In conclusion, documentation is important, a critical part of advocacy and the development process at the larger scale. It isn't just words, but rather a vital structural flow of information from one part of the larger community to another, necessary to sustain progress in any complex field. We would all do well to remember this - and to see that building this documentation is an activity in which we can all pitch in to help. Evidence Suggests that, at Least in Earlier Stages, Alzheimer's Disease Blocks Rather than Destroys Memories https://www.fightaging.org/archives/2017/07/evidence-suggests-that-at-least-in-ea...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
CONCLUSIONS: The quality of the evidence examining physical activity and exercise for chronic pain is low. This is largely due to small sample sizes and potentially underpowered studies. A number of studies had adequately long interventions, but planned follow-up was limited to less than one year in all but six reviews.There were some favourable effects in reduction in pain severity and improved physical function, though these were mostly of small-to-moderate effect, and were not consistent across the reviews. There were variable effects for psychological function and quality of life.The available evidence suggests physica...
Source: Cochrane Database of Systematic Reviews - Category: Journals (General) Authors: Tags: Cochrane Database Syst Rev Source Type: research
Cytokine levels are associated with debilitating chronic pain conditions that share obesity as a risk factor (e.g. osteoarthritis and migraines), although their mechanistic connections are not clear. Additionally, pro-inflammatory cytokine levels are correlated with anxiety and depression, both common in pediatric chronic pain. We hypothesized that differences in pain and functional disability in youth with co-morbid chronic pain and obesity may be associated with a cytokine imbalance (i.e. increased pro-inflammatory cytokines and decreased anti-inflammatory cytokines).
Source: The Journal of Pain - Category: Materials Science Authors: Source Type: research
CONCLUSIONS: The quality of the evidence examining physical activity and exercise for chronic pain is low. This is largely due to small sample sizes and potentially underpowered studies. A number of studies had adequately long interventions, but planned follow-up was limited to less than one year in all but six reviews.There were some favourable effects in reduction in pain severity and improved physical function, though these were mostly of small-to-moderate effect, and were not consistent across the reviews. There were variable effects for psychological function and quality of life.The available evidence suggests physica...
Source: Cochrane Database of Systematic Reviews - Category: Journals (General) Authors: Tags: Cochrane Database Syst Rev Source Type: research
The United States is struggling to deal with an opioid epidemic that is damaging lives, resulting in overdoses, and yet not reducing chronic pain. National initiatives are underway to dramatically reduce access to prescription opioids, but these efforts lack a systematic approach to provide alternative treatments for these patients. Policy changes are urgently needed to provide better care for patients with chronic pain, and in this post, we outline three feasible policy initiatives. Innovative reimbursement initiatives by the Centers for Medicare and Medicaid Services (CMS) could frame and stimulate use of evidence-based ...
Source: Health Affairs Blog - Category: Health Management Authors: Tags: Drugs and Medical Technology Health Professionals Public Health Quality chronic pain Opioid Addiction opioids Source Type: blogs
Abstract: We compared the short-term efficacy of rigid versus soft lateral wedge arch support (LWAS) insoles for patients with knee osteoarthritis (OA), as assessed using the International Classification of Functioning, Disability and Health (ICF) system, through a prospective, double-blind, randomized controlled trial. Participants who fulfilled the combined radiographic and clinical criteria for knee OA, as defined by the American College of Rheumatology, were randomly prescribed 1 pair of rigid or soft LWAS insoles. Body functions and structures were evaluated according to Kellgren–Lawrence scores, the Foot Postu...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Trial/Experimental Study Source Type: research
This study is a placebo-controlled, randomized, double-blind, parallel design trial. One hundred sixty out-patients who are more than 50 years old and who have osteoarthritis of the knee will be recruited from the island of Mallorca, Spain. Each participant will be randomly placed into one of two groups: (sham) electro-acupuncture non-insertion technique and real electro-acupuncture. Acupuncture treatments will be the Traditional Chinese Medicine type. The patients will be evaluated after a period of 1 month (with two weekly sessions), 3 months (with one monthly session), 6 months (with one session every 45 days...
Source: Trials - Category: Research Source Type: clinical trials
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