Search results for "Lipoxins"

showing 3 items of 3 documents

Anti-inflammatory lipoxin A4 is an endogenous allosteric enhancer of CB1 cannabinoid receptor.

2012

Allosteric modulation of G-protein–coupled receptors represents a key goal of current pharmacology. In particular, endogenous allosteric modulators might represent important targets of interventions aimed at maximizing therapeutic efficacy and reducing side effects of drugs. Here we show that the anti-inflammatory lipid lipoxin A 4 is an endogenous allosteric enhancer of the CB 1 cannabinoid receptor. Lipoxin A 4 was detected in brain tissues, did not compete for the orthosteric binding site of the CB 1 receptor (vs. 3 H-SR141716A), and did not alter endocannabinoid metabolism (as opposed to URB597 and MAFP), but it enhanced affinity of anandamide at the CB1 receptor, thereby potentiating …

Cannabinoid receptorAllosteric regulationAnti-Inflammatory AgentsSpatial BehaviorEndogenyAmyloidogenic ProteinsMice TransgenicBiologyPharmacologyReceptors G-Protein-Coupled03 medical and health scienceschemistry.chemical_compoundMice0302 clinical medicineReceptor Cannabinoid CB1In vivoMemoryCommentariesAnimalsReceptor030304 developmental biologyInflammationMice Knockout0303 health sciencesMultidisciplinarymusculoskeletal neural and ocular physiologyBrainAnandamideURB597Biological SciencesEndocannabinoid system3. Good healthLipoxinsMice Inbred C57BLKineticsNeuroprotective Agentschemistrynervous systemlipids (amino acids peptides and proteins)030217 neurology & neurosurgerypsychological phenomena and processesAllosteric SiteEndocannabinoidsProceedings of the National Academy of Sciences of the United States of America
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Lipoxygenase-derived arachidonic acid metabolites in chronic obstructive pulmonary disease

2011

Background and Objective. Chronic obstructive pulmonary disease (COPD) is characterized by a persistence of inflammation in large and small airways. We hypothesized that this could be caused by the inability of an inflammatory process to resolve. In the resolution of inflammation, a switching of arachidonic acid metabolism from the production of proinflammatory leukotriene B4 (LtB4) to the synthesis of anti-inflammatory lipoxins plays an important role. The aim of our study was to determine the content of lipoxin A4 (LXA4) and LtB4 in induced sputum of patients with exacerbated COPD and to compare it to healthy controls, as well as to analyze the relationship between proinflammatory and ant…

MaleSputum CytologyExacerbationLeukotriene B4InflammationLeukotriene B4Proinflammatory cytokinePulmonary Disease Chronic Obstructivechemistry.chemical_compoundHumansMedicineCOPDbusiness.industrySputumGeneral MedicineMiddle Agedmedicine.diseaserespiratory tract diseasesLipoxinschemistrychronic obstructive pulmonary disease; exacerbation; lipoxin A<sub>4</sub>; leukotriene B<sub>4</sub>ImmunologyAbsolute neutrophil countSputumFemalelipids (amino acids peptides and proteins)medicine.symptombusiness
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Regulation of T-Cell Immune Responses by Pro-Resolving Lipid Mediators

2021

Both the initiation and the resolution of inflammatory responses are governed by the sequential activation, migration, and control/suppression of immune cells at the site of injury. Bioactive lipids play a major role in the fine-tuning of this dynamic process in a timely manner. During inflammation and its resolution, polymorphonuclear cells (PMNs) and macrophages switch from producing pro-inflammatory prostaglandins and leukotrienes to specialized pro-resolving lipid mediators (SPMs), namely, lipoxins, resolvins, protectins, and maresins, which are operative at the local level to limit further inflammation and tissue injury and restore homeostasis. Accumulating evidences expand now the rol…

chronic inflammationT cellT-LymphocytesImmunologyInflammationReviewBiologymedicine.disease_causeT-Lymphocytes RegulatoryAutoimmunity03 medical and health sciencesImmunomodulating Agents0302 clinical medicineImmune systemmedicineHumansImmunology and Allergy030304 developmental biology0303 health sciencestherapyEffectorautoimmunityresolutionT cellLipid signalingadaptive immunityRC581-607Acquired immune systemCellular Reprogramming3. Good healthLipoxinsmedicine.anatomical_structureEicosapentaenoic AcidImmunologyspecialized pro-resolving lipid mediators (SPMs)Eicosanoidsmedicine.symptomImmunologic diseases. AllergyInflammation MediatorsHomeostasis030215 immunologyFrontiers in Immunology
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