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dc.contributorSistema FMUSP-HC: Faculdade de Medicina da Universidade de São Paulo (FMUSP) e Hospital das Clínicas da FMUSP-
dc.contributor.authorMARQUES, Ricardo Henrique-
dc.contributor.authorREIS, Fabiana G.-
dc.contributor.authorSTARLING, Claudia M.-
dc.contributor.authorCABIDO, Claudia-
dc.contributor.authorALMEIDA-REIS, Rafael de-
dc.contributor.authorDOHLNIKOFF, Marisa-
dc.contributor.authorPRADO, Carla M.-
dc.contributor.authorLEICK, Edna A.-
dc.contributor.authorMARTINS, Milton A.-
dc.contributor.authorTIBERIO, Iolanda F. L. C.-
dc.identifier.citationNEUROIMMUNOMODULATION, v.19, n.3, p.158-170, 2012-
dc.description.abstractMechanisms involved in stress-induced asthmatic alterations have been poorly characterised. We assessed whether inducible nitric oxide synthase (iNOS) inhibition modulates the stress-amplified lung parenchyma responsiveness, oxidative stress and extracellular matrix remodelling that was previously increased by chronic lung inflammation. Guinea pigs were subjected to 7 exposures to ovalbumin (1-5 mg/ml) or saline (OVA and SAL groups) over 4 weeks. To induce behavioural stress, animals were subjected to a forced swimming protocol (5 times/week, over 2 weeks; SAL-Stress and OVA-Stress groups) 24 h after the 4th inhalation. 1400W (iNOS-specific inhibitor) was administered intraperitoneally in the last 4 days of the protocol (SAL-1400W, OVA-1400W, SAL-Stress+1400W and OVA-Stress+1400W groups). Seventy-two hours after the last inhalation, animals were anaesthetised and exsanguinated, and adrenal glands were removed. Lung tissue resistance and elastance were evaluated by oscillatory mechanics and submitted for histopathological evaluation. Stressed animals had higher adrenal weights compared to non-stressed groups, which were reduced by 1400W treatment. Behavioural stress in sensitised animals amplified the resistance and elastance responses after antigen challenge, numbers of eosinophils and iNOS+ cells, actin content and 8-iso-PGF2 alpha density in the distal lung compared to the OVA group. 1400W treatment in ovalbumin-exposed and stressed animals reduced lung mechanics, iNOS+ cell numbers and 8-iso-PGF2a density compared to sensitised and stressed animals that received vehicle treatment. We concluded that stress amplifies the distal lung constriction, eosinophilic inflammation, iNOS expression, actin content and oxidative stress previously induced by chronic lung inflammation. iNOS-derived NO contributes to stress-augmented lung tissue functional alterations in this animal model and is at least partially due to activation of the oxidative stress pathway.-
dc.subjectExperimental asthma model-
dc.subjectBehavioural stress-
dc.subjectLung parenchyma-
dc.subjectInducible nitric oxide synthase-
dc.subjectOxidative stress-
dc.subject.otherallergic airway inflammation-
dc.subject.othercorticotropin-releasing hormone-
dc.subject.otherforced swim test-
dc.subject.othertissue mechanics-
dc.subject.othersensitized rats-
dc.subject.otherpsychological stress-
dc.titleInducible Nitric Oxide Synthase Inhibition Attenuates Physical Stress-Induced Lung Hyper-Responsiveness and Oxidative Stress in Animals with Lung Inflammation-
dc.rights.holderCopyright KARGER-
dc.subject.wosEndocrinology & Metabolism-
dc.type.categoryoriginal article-
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Artigos e Materiais de Revistas Científicas - FM/MCM
Departamento de Clínica Médica - FM/MCM

Artigos e Materiais de Revistas Científicas - FM/MPT
Departamento de Patologia - FM/MPT

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - HC/ICr
Instituto da Criança - HC/ICr

Artigos e Materiais de Revistas Científicas - HC/InCor
Instituto do Coração - HC/InCor

Artigos e Materiais de Revistas Científicas - LIM/05
LIM/05 - Laboratório de Poluição Atmosférica Experimental

Artigos e Materiais de Revistas Científicas - LIM/20
LIM/20 - Laboratório de Terapêutica Experimental

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