Результаты поиска

Control of inflammatory pain by chemokine-mediated recruitment of opioid-containing polymorphonuclear cells.

Opioid-containing leukocytes can counteract inflammatory hyperalgesia. Under stress or after local injection of corticotropin releasing factor (CRF), opioid peptides are released from leukocytes, bind to opioid receptors on peripheral sensory neurons and mediate antinociception. Since polymorphonuclear cells (PMN) are the predominant opioid-containing leukocyte subpopulation in early inflammation, we hypothesized that PMN and their recruitment by chemokines are important for peripheral opioid-mediated antinociception at this stage. Rats were intraplantarly injected with complete Freund's adjuv

The cloned capsaicin receptor integrates multiple pain-producing stimuli.

Capsaicin, the main pungent ingredient in "hot" chili peppers, elicits buming pain by activating specific (vanilloid) receptors on sensory nerve endings. The cloned vanilloid receptor (VR1) is a cation channel that is also activated by noxious heat. Here, analysis of heat-evoked single channel currents in excised membrane patches suggests that heat gates VR1 directly. We also show that protons decrease the temperature threshold for VR1 activation such that even moderately acidic conditions (pH < or = 5.9) activate VR1 at room temperature. VR1 can therefore be viewed as a molecular integrator o

Peripheral neural mechanism of visceral pain and acupoint sensitization in 2, 4, 6-trinitrobenzene sulfonic acid-induced colitis model mice.

OBJECTIVES: To explore the neural mechanism of visceral pain and related somatic (acupoints) sensitization by using in vivo calcium imaging of dorsal root ganglia (DRG) neurons. METHODS: Eight BALB/c mice were randomly divided into control and model groups, with 4 mice in each group. The colitis model was induced by colorectal perfusion of 2, 4, 6-trinitrobenzene sulfonic acid (TNBS) once daily for 7 days. Mice of the control group received colorectal perfusion of normal saline once daily for 7 days. The location and area of the somatic neurogenic inflammation (cutaneous exudation of Evans bl…

Neurodystrophic Hand Dermatitis: Sannino Barduagni Syndrome.

Hand eczema is a chronic disease (1), commonly considered the expression of a contact allergic or irritative dermatitis. However, when the p … ning the presence of burning sensation. However, in our opinion, NHD should not be classified as a "neurogenic inflammation". This term describes the vasodilation and protein extravasation caused by inflammatory neuropeptides and adrenergic transmitters that influence the antigen presentation, mast-cell degranulation, and cytokine release (2). In fact, corticosteroids an …

Histamine in migraine and brain.

BACKGROUND: Histamine has been studied in both health and disease since the initial description a century ago. With its vasodilative effect, … ic neurons themselves, and centrally acting H3 receptor agonist prodrugs have shown to both inhibit neurogenic inflammation in dura, to induce sleep, and to produce antinociception. There are no registered ongoing studies on H3 and H4 receptor ligands in migraine. CONCLUSION: The role of the central histaminergic system in migraine is largely unexplored, but findings fr …

Occupational nanosafety considerations for carbon nanotubes and carbon nanofibers.

Carbon nanotubes (CNTs) are carbon atoms arranged in a crystalline graphene lattice with a tubular morphology. CNTs exhibit high tensile strength, possess unique electrical properties, are durable, and can be functionalized. These properties allow applications as structural materials, in electronics, as heating elements, in batteries, in the production of stain-resistant fabric, for bone grafting and dental implants, and for targeted drug delivery. Carbon nanofibers (CNFs) are strong, flexible fibers that are currently used to produce composite materials. Agitation can lead to aerosolized CNTs

Neuropeptides in the skin of patients with atopic dermatitis.

There is increasing evidence that neuropeptides may be involved in the pathogenesis of atopic dermatitis (AD). This study examines whether n … ations of the disease can be provoked by stress, scratching and sweating which may be the result of neurogenic inflammation. One of the first features of an exacerbation is flushing of the affected skin and pruritus. Several neuropeptides that have been identified in human skin are potent inducers of vasodilation and may induce pruritus. Substance P (SP), calcitonin gene …

Postural correction training improves chronic pain, nerve function, and inflammation in knee osteoarthritis: A retrospective cohort study.

BACKGROUND: Knee osteoarthritis (KOA) is a prevalent degenerative joint disorder characterized by complex neuroinflammatory mechanisms involving peripheral-central nervous system crosstalk. Current research gaps exist regarding the modulatory effects of biomechanical interventions such as postural correction training (PCT) on these pathways, particularly its impact on neurogenic inflammation and associated nerve dysfunction. AIM: To examine the effect of PCT on chronic pain related to KOA, nerve function, and inflammatory factors and further assess the influencing factors. METHODS: This stud…

Diagnostic Guidance for Chronic Complex Regional Pain Syndrome Type I and Type II from The American Society of Interventional Physicians (ASIPP).

BACKGROUND: Complex Regional Pain Syndrome (CRPS) is a challenging and often disabling condition marked by persistent pain, most commonly in … eria by incorporating time-dependent features of chronic CRPS, including musculoskeletal dystrophy, neurogenic inflammation, and sympathetic dysfunction. Emerging objective tools-such as quantitative sensory testing (QST), skin biopsy for IENFD, functional MRI, and serum biomarkers of neuroinflammation-may further support diagnosis in complex or uncertain cases.Treatment …

Intravesical Instillation of Hyaluronic Acid (Cystistat) for the Treatment of Category III Prostatitis: A Retrospective Study.

BACKGROUND: Chronic nonbacterial prostatitis/chronic pelvic pain syndrome (CP/CPPS), classified as National Institutes of Health (NIH) category III prostatitis, is a common urological disorder, accounting for 90%-95% of prostatitis cases. Its pathogenesis involves inflammatory cascades along the bladder-prostate axis, neurogenic inflammation, and impairment of the mucosal barrier. Sodium hyaluronate (Cystistat), a glycosaminoglycan (GAG) layer replenishment agent, has demonstrated efficacy in treating bladder pain syndrome. However, its therapeutic role in CP/CPPS remains underexplored. OBJEC…

[Mechanism of electroacupuncture at sensitized "Sanyinjiao" (SP6) in alleviating primary dysmenorrhea in rats based on Piezo1 ion channel].

OBJECTIVES: To investigate the mechanism of electroacupuncture (EA) at sensitized "Sanyinjiao" (SP6) in improving primary dysmenorrhea (PDM) … ch may involve regulating Piezo1 expression at the acupoint, inhibiting mast cell degranulation and neurogenic inflammation, and down-regulating the Piezo1/COX-2/PGs pathway in the uterus to reduce inflammatory factor release, thereby producing analgesic effects.

From popular use to pharmacological validation: a study of the anti-inflammatory, anti-nociceptive and healing effects of Chenopodium ambrosioides extract.

UNLABELLED: ETHNO-PHARMACOLOGICAL RELEVANCE: Chenopodium ambrosioides (Amarantaceae) is an annual or perennial plant popularly known as 'erva de Santa Maria', 'mastruço' and 'erva-do-formigueiro'. This herb is used in folk medicine in the form of teas, poultices and infusions for inflammatory problems, contusions and lung infections, and as an anthelmintic and anti-fungal. AIM OF THE STUDY: The aim of the present study was to further the understanding of the anti-nociceptive, anti-inflammatory and wound healing effects of ethanol extract (EE) obtained from the leaves and stems of Chenopodium

Pharmacological synergy: the next frontier on therapeutic advancement for migraine.

The burden of migraine significantly impacts the individual sufferer, their families, the workplace, and society. The World Health Organizat … nhibits the COX-1 and COX-2 enzymes. Sumatriptan has vasoconstricting effects as well as effects on neurogenic inflammation by decreasing the release of substance P and calcitonin gene-related peptide. In contrast, naproxen affects prostaglandins and other inflammatory mediators. Because sumatriptan and naproxen both relieve migraine yet interact with different cellular …

Proactive Prophylaxis With Azithromycin and HydroxyChloroquine in Hospitalised Patients With COVID-19 (ProPAC-COVID): A structured summary of a study protocol for a randomised controlled trial.

OBJECTIVES: The aim of this randomised GCP-controlled trial is to clarify whether combination therapy with the antibiotic azithromycin and hydroxychloroquine via anti-inflammation/immune modulation, antiviral efficacy and pre-emptive treatment of supra-infections can shorten hospitalisation duration for patients with COVID-19 (measured as "days alive and out of hospital" as the primary outcome), reduce the risk of non- invasive ventilation, treatment in the intensive care unit and death. TRIAL DESIGN: This is a multi-centre, randomised, Placebo-controlled, 2-arm ratio 1:1, parallel group doub

Applied information retrieval and multidisciplinary research: new mechanistic hypotheses in complex regional pain syndrome.

BackgroundCollaborative efforts of physicians and basic scientists are often necessary in the investigation of complex disorders. Difficulties can arise, however, when large amounts of information need to reviewed. Advanced information retrieval can be beneficial in combining and reviewing data obtained from the various scientific fields. In this paper, a team of investigators with varying backgrounds has applied advanced information retrieval methods, in the form of text mining and entity relationship tools, to review the current literature, with the intention to generate new insights into th

Совпадение в полном тексте источника
… Additional to classic inflammation, a process called neurogenic inflammation has been demonstrated in CRPS [ 13 - 17 ]. Neurogenic inflammation resembles classic inflammation, but it is initiated by neuropeptides instead of lymphocytes and cytokines [ 18 ]. … Starting point: neurogenic inflammation . Mediated by NFκB, a trigger that induces neurogenic inflammation can induce the entire pathogenesis of CRPS. …

Capsaicin: Current Understanding of Its Mechanisms and Therapy of Pain and Other Pre-Clinical and Clinical Uses.

In this review, we discuss the importance of capsaicin to the current understanding of neuronal modulation of pain and explore the mechanisms of capsaicin-induced pain. We will focus on the analgesic effects of capsaicin and its clinical applicability in treating pain. Furthermore, we will draw attention to the rationale for other clinical therapeutic uses and implications of capsaicin in diseases such as obesity, diabetes, cardiovascular conditions, cancer, airway diseases, itch, gastric, and urological disorders.

Chronic pruritus: a narrative review.

Chronic pruritus encompasses a manifestation of several cutaneous, allergic, infectious, neurological, psychological, and systemic conditions, whose etiological investigation and therapeutic strategy can be challenging. This comprehensive review aims to enhance the understanding of pruritus by highlighting important elements in its pathogenesis, including keratinocytes, Merkel cells and mast cells, nerve fibers, histaminergic and nonhistaminergic pathways, and the interaction of itch signals with the central nervous system. Diagnostic evaluation of chronic pruritus may require a meticulous app

Regional differences in oesophageal motor function.

GW Pharmaceuticals is undertaking a major research programme in the UK to develop and market distinct cannabis-based prescription medicines [THC:CBD, High THC, High CBD] in a range of medical conditions. The cannabis for this programme is grown in a secret location in the UK. It is expected that the product will be marketed in the US in late 2003. GW's cannabis-based products include selected phytocannabinoids from cannabis plants, including D9 tetrahydrocannabinol (THC) and cannabidiol (CBD). The company is investigating their use in three delivery systems, including sublingual spray, subling

Cardio-cerebral infarction: a narrative review of pathophysiology, treatment challenges, and prognostic implications.

Cardio-cerebral infarction (CCI) is a rare clinical syndrome characterized by the simultaneous or sequential occurrence of acute myocardial infarction (AMI) and acute ischemic stroke (AIS). Despite its complex pathogenesis and more severe prognosis compared to isolated AMI or AIS, no consensus has been established regarding its definition, classification, epidemiology, treatment protocols, or prognostic management. Current research is largely confined to case reports or small case series, and there are no unified diagnostic or treatment guidelines, nor any expert consensus. Consequently, clini

Pituitary Adenylate Cyclase-Activating Polypeptide: 30 Years in Research Spotlight and 600 Million Years in Service.

Emerging from the depths of evolution, pituitary adenylate cyclase-activating polypeptide (PACAP) and its receptors (i.e., PAC1, VPAC1, VPAC2) are present in multicellular organisms from Tunicates to humans and govern a remarkable number of physiological processes. Consequently, the clinical relevance of PACAP systems spans a multifaceted palette that includes more than 40 disorders. We aimed to present the versatility of PACAP1-38 actions with a focus on three aspects: (1) when PACAP1-38 could be a cause of a malfunction, (2) when PACAP1-38 could be the cure for a malfunction, and (3) when PA

Совпадение в полном тексте источника
… Each of them has been investigated in both migraine and related neurogenic inflammation research, with mixed results [ 171 ]. CGRP did not seem to be involved in neurogenic inflammation and it induced neither mast cell degranulation in humans nor plasma protein extravasation [ 172 , 173 ]. … Significantly smaller edema was developed in PACAP knockout animals in neurogenic inflammation. Nevertheless, lacking PACAP1-38 did not influence the symptoms of non-neurogenic inflammation [ 76 ]. …