Search results for "Neurogenic inflammation"

Neurogenic Inflammation in Complex Regional Pain Syndrome (CRPS)

2008

This chapter explains symptoms and nature of neurogenic inflammation and its importance in posttraumatic complex regional pain syndrome (CRPS). Neurogenic inflammation regularly accompanies excitation of primary afferent nociceptors. It has two major components – plasma extravasation and vasodilatation. The most important mediators are the neuropeptides calcitonin gene-related peptide (CGRP) and substance P (SP). After peripheral trauma, immune reaction (e.g., cytokines) and the attempts of the tissue to regenerate (e.g., growth factors) sensitize nociceptors and thereby amplify neurogenic inflammation. This cascade of events has recently been demonstrated in rat models of CRPS employing di…

OP0193 Inflammation of adventitial nerves occurs in giant cell arteritis patients and it is characterized by inflammasomes, upr and autophagy activat…

2017

Background Vascular adventitia is a major site of immune surveillance and inflammatory cell trafficking and is the most complex compartment of the vessel wall comprising fibroblasts, dendritic cells and macrophages, progenitor cells, vasa vasorum, pericytes and adrenergic nerves. It has been proposed that activation of adventitial nerves and release of sensory neuropeptides from their peripheral terminals may leads to neurogenic inflammation. Giant cell arteritis (GCA) is an immune-mediated disease of unknown etiology in which the inflammatory process seems to start from the adventitia of affected arteries. Objectives aim of the study was to evaluate the occurrence of adventitial nerves inf…

Topical capsaicin application and axon reflex vasodilatation of the tongue: A videocapillaroscopic study

2006

The aim of this study was to evaluate the effects of topical capsaicin application on human lingual mucosa and to assess if neurogenic inflammation might have a role in the pathogenesis of lingual diseases. Thirty patients (16 males and 14 females; mean age: 41.46 +/- 11.8 years; range: 23-60) were examined in our laboratory. The neurogenic inflammation was experimentally induced in the lingual mucosa close to 1) the left margin of the tongue and 2) the right margin of the tongue after ipsilateral nerve trunk anesthesia. The characteristics of lingual microcirculation were observed using computerized videocapillaroscopic techniques. The vasodilatation was observed close to the left margin o…

RHEUMATOID ARTHRITIS INDUCED BY INTRA-ARTICULAR INJECTION OF COMPLETE FREUND’S ADJUVANT ALTERS THE EXPRESSION OF VARIOUS HSPS IN THE DIFFERENT REGION…

2023

Role of Peripheral Immune Cells-Mediated Inflammation on the Process of Neurodegenerative Diseases

2020

Neurodegenerative diseases are characterized by progressive loss of selectively vulnerable neuronal populations, which contrasts with selectively static loss of neurons due to toxic or metabolic disorders. The mechanisms underlying their progressive nature remain unknown. To date, a timely and well-controlled peripheral inflammatory reaction is verified to be essential for neurodegenerative diseases remission. The influence of peripheral inflammation on the central nervous system is closely related to immune cells activation in peripheral blood. The immune cells activation participated in the uncontrolled and prolonged inflammation that drives the chronic progression of neurodegenerative di…

Increased pain and neurogenic inflammation in mice deficient of neutral endopeptidase

2009

The complex regional pain syndrome (CRPS) is characterized by enhanced neurogenic inflammation, mediated by neuropeptides. Neutral endopeptidase (NEP) is a key enzyme in neuropeptide catabolism. We used NEP knock out (ko) mice to investigate whether NEP deficiency leads to increased pain behavior and signs of neurogenic inflammation after soft tissue trauma with and without nerve injury. After chronic constriction injury (CCI) of the right sciatic nerve, NEP ko mice were more sensitive to heat, to mechanical stimuli, and to cold than wild type mice. Tissue injury without nerve injury produced no differences between genotypes. After CCI, NEP ko mice showed increased hind paw edema but lower …

Peripheral amplification of sweating - a role for calcitonin gene-related peptide

2006

Neuropeptides are the mediators of neurogenic inflammation. Some pain disorders, e.g. complex regional pain syndromes, are characterized by increased neurogenic inflammation and by exaggerated sudomotor function. The aim of this study was to explore whether neuropeptides have a peripheral effect on human sweating. We investigated the effects of different concentrations of calcitonin gene-related peptide (CGRP), vasoactive intestinal peptide (VIP) and substance P (SP) on acetylcholine-induced axon reflex sweating in healthy subjects (total n = 18). All substances were applied via dermal microdialysis. The experiments were done in a parallel setting: ACh alone and ACh combined with CGRP, VIP …

Neuropeptides, neurogenic inflammation and complex regional pain syndrome (CRPS)

2008

This review explains symptoms and nature of neuropeptide signaling and its importance for clinical symptoms of CRPS. Neurogenic inflammation regularly accompanies excitation of primary afferent nociceptors. It has two major components-plasma extravasation and vasodilatation. The most important mediators are the calcitonin gene-related peptide (CGRP) and substance P (SP). After peripheral trauma immune reaction (e.g. cytokines) and the attempts of the tissue to regenerate (e.g. growth factors) sensitize nociceptors and amplify neurogenic inflammation. This cascade of events has been demonstrated in rat models of CRPS. Clinical findings in these animals strongly resemble clinical findings in …

THE ROLE OF NEUROMODULATORS (SUBSTANCE P AND CALCITONINE GENE-RELATED PEPTIDE) IN THE DEVELOPMENT OF NEUROGENIC INFLAMMATION IN THE ORAL MUCOSA

2004

Vatous observations carried out in the course of the years have shown that certain neuropeptides have a possible role to play as inflammation mediators. The substances on which attention has been principally focused are: substance P, calcitonin gene-related peptide, capsaicin an histamine. Knowledge acquired in this field, however, does not yet permit us to sufficiently clarify the role, not to speak of the possible action mechanism, on the basis of which these neuropeptides act, although it is confirmed that these substances have been found first in laboratory animals and later also in human tissues in the course of experimentally induced neurogenic inflammation. The need to know more and …