Blockade of spinal α5-GABAA receptors differentially reduces reserpine-induced fibromyalgia-type pain in female rats.

Blockade of spinal α5-GABAA receptors differentially reduces reserpine-induced fibromyalgia-type pain in female rats. Eur J Pharmacol. 2019 Jun 07;:172443 Authors: De la Luz-Cuellar YE, Rodríguez-Palma EJ, Franco-Enzástiga Ú, Salinas-Abarca AB, Delgado-Lezama R, Granados-Soto V Abstract The role of spinal α5 subunit-containing GABAA (α5-GABAA) receptors in chronic pain is controversial. The purpose of this study was to investigate the participation of spinal α5-GABAA receptors in the reserpine-induced pain model. Reserpine administration induced tactile allodynia and muscle hyperalgesia in female and male rats. Intrathecal injection of L-655,708 and TB 21007 (7 days after the last reserpine injection) decreased tactile allodynia and, at a lesser extent, muscle hyperalgesia in female rats. The effects of these drugs produced a lower antiallodynic and antihyperalgesic effect in male than in female rats. Contrariwise, these drugs produced tactile allodynia and muscle hyperalgesia in naïve rats and these effects were lower in naïve male than female rats. Intrathecal L-838,417 prevented or reversed L-655,708-induced antiallodynia in reserpine-treated female rats. Repeated treatment with α5-GABAA receptor small interfering RNA (siRNA), but not scramble, siRNA reduced reserpine-induced allodynia in female rats. Accordingly, α5-GABAA receptor siRNA induced nociceptive hypersensitivity in naï...
Source: European Journal of Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Eur J Pharmacol Source Type: research

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ra SM Abstract Fibromyalgia is a disease characterised as generalised chronic primary pain that causes functional disability and a reduction in patients' quality of life, without specific pathophysiology or appropriate treatment. Previous studies have shown that kinins and their B1 and B2 receptors contribute to chronic painful conditions. Thus, we investigated the involvement of kinins and their B1 and B2 receptors in a fibromyalgia-like pain model induced by reserpine in mice. Nociceptive parameters (mechanical allodynia, cold sensitivity and overt nociception) and behaviours of burrowing, thigmotaxis, and force...
Source: Biochemical Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Biochem Pharmacol Source Type: research
As physicians, many of our daily practices involve administration of substances that are shrouded in mystery. Certain medications, specifically opioids, have been part of tragic news stories, and have turned young children into orphans, happy spouses into widows and widowers, and once-aspirational youth into memories. The CDC reports that on average, 130 people die each day from an opioid overdose. With such harrowing statistics, why take opioids in the first place? Well, if used appropriately, opioids can significantly improve pain with relatively tolerable side effects. A short-term course of opioids (typically 3 to 7 da...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Addiction Pain Management Source Type: blogs
Publication date: Available online 12 June 2019Source: Best Practice &Research Clinical RheumatologyAuthor(s): Martin DiersAbstractIn this chapter, we provide an overview of neuroimaging studies in chronic pain. We start with an introduction about the phenomenology of pain. In the following section, the application of functional and structural imaging techniques is shown in selected chronic pain syndromes (chronic back pain, fibromyalgia syndrome (FMS), phantom limb pain, and complex regional pain syndrome (CRPS)), and commonalities and peculiarities of imaging correlates across different types of chronic pain are disc...
Source: Best Practice and Research Clinical Rheumatology - Category: Rheumatology Source Type: research
I was looking back over the last 8 years since the first Wheat Belly book was released. It’s been 8 years of astounding, truly breathtaking stories of success over weight issues, health, and physical transformations that skeptics even today claim are impossible. It’s been a virtual avalanche of wonderful stories. Although I’ve seen all of them, often more than once, I could not help but be overcome with satisfaction and pride for the many, many spectacular photos and stories people have shared. So I thought it would be fun to re-post a small sample of some of these stories dating back from the start of th...
Source: Wheat Belly Blog - Category: Cardiology Authors: Tags: Wheat Belly Success Stories grain-free Inflammation Source Type: blogs
CONCLUSION: The prevalence of chronic pain was associated with females in 50-59 years old and severe mixed pain. It was located mainly in lower limbs and lumbar region. The most frequent diagnosis was low back pain followed by fibromyalgia. The patients were informed about their disease and treatment. PMID: 31160047 [PubMed - as supplied by publisher]
Source: Revista Brasileira de Anestesiologia - Category: Anesthesiology Tags: Rev Bras Anestesiol Source Type: research
You're reading Options to Opioids: How to Manage Chronic Pain Without Prescribing Pain-Killers, originally posted on Pick the Brain | Motivation and Self Improvement. If you're enjoying this, please visit our site for more inspirational articles. While there is considerable debate as to how much blame doctors should be assigned for the ongoing opioid crisis, there is little doubt they can do something to curtail it -- that instead of prescribing drugs that have been found to be highly addictive they can resort to alternate forms of pain management. Doctors’ prescription of powerful painkillers like OxyContin is frequ...
Source: PickTheBrain | Motivation and Self Improvement - Category: Consumer Health News Authors: Tags: health and fitness addiction health and wellness opioids self improvement Source Type: blogs
Abstract Fibromyalgia (FM) is a chronic pain syndrome involving complex interplay of biogenic amines and NMDA receptor mediated hypersensitization of nociceptive pathways. Clinical management of FM is poorly addressed with only a few available therapeutic options. Coumarins are active phenolic molecules of natural origin found to have broad pharmacological activities. Current investigation explores the role of naturally occurring coumarin, imperatorin in mouse model of fibromyalgia. Administration of reserpine (0.5 mg/kg, s.c.) thrice at 24 h intervals induced behavioral and neurochemical alterations characteristi...
Source: Biochemical Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Biochem Pharmacol Source Type: research
ConclusionThe prevalence of chronic pain was associated with females in 50–59 years old and severe mixed pain. Pain was located mainly in lower limbs and lumbar region. The most frequent diagnosis was low back pain followed by fibromyalgia. The patients were informed about their disease and treatment.ResumoJustificativa e objetivosA dor é um dos motivos mais comuns para procurar atendimento médico. Este estudo teve como objetivo analisar pacientes com dor crônica atendidos em Maricá, no estado do Rio de Janeiro, Brasil.MétodosEstudo transversal retrospectivo com 200 pacientes, atendi...
Source: Brazilian Journal of Anesthesiology - Category: Anesthesiology Source Type: research
We examined the expression of TRPV1 in peripheral tissue and DRG neurons of CPIP model rats and we studied whether CPIP model could induce peripheral sensitization of TRPV1 channel and enhance DRG neuron excitability. Then we examined the therapeutic effects of locally applied TRPV1 specific antagonist AMG9810 on pain responses of CPIP model rats. Lastly, we explored the effects of AMG9810 on DRG neuron hyperexcitability and spinal glial activation induced by CPIP. Our results demonstrate that TRPV1 plays an important role in mediating the behavioral hypersensitivity of CPIP model rats via promoting peripheral nociceptor a...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
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
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