Sleep deprivation predisposes allergic mice to develop neutrophilic lung inflammation

Publication date: Available online 19 July 2017
Source:Journal of Allergy and Clinical Immunology
Author(s): Jethe Nunes de Oliveira Filho, Juliana de Souza Apostolico, David Anibal Garrido Andrade, Francieli Ruiz da Silva, Edgar Ruz Fernandes, Monica Levy Andersen, Alexandre Castro Keller, Daniela Santoro Rosa
BackgroundAlthough different studies associated sleep deprivation with systemic inflammatory changes, the effect of sleep duration on the pathology of allergic chronic diseases is poorly understood.ObjectiveTo evaluate the influence of sleep deprivation on allergen-induced pulmonary inflammation.MethodsOvalbumin (OVA)-sensitized C57BL/6 mice were exposed to a first set of intranasal OVA challenge under sleep deprivation (SD) or healthy sleep (HS) conditions followed by a second OVA challenge, one week apart. Some groups were subjected to corticoid treatment with dexamethasone.ResultsOVA-sensitized SD mice developed a more severe airway inflammation than the HS allergic group. Analysis of lung parenchyma revealed that the inflammation in SD allergic mice was marked by an influx of neutrophils (mainly) and eosinophils and secretion of IL-6, TNF-α, and IL-17, in contrast to the eosinophilic inflammation and IL-4 production observed in HS allergic mice. The same cytokine profile was observed in ex vivo culture of cervical lymph nodes cells and splenocytes, indicating that in allergic mice SD favors immune responses towards a pro-inflammatory Th17 profile. This idea is supported by the fact that disruption of IL-17 signaling (IL-17RA^-/-) prevented airway neutrophilia in allergic SD mice. Furthermore, SD allergic mice became refractory to corticoid treatment, in contrast to HS allergic group.ConclusionCollectively, our data show that sleep quality participates in the progression of allergen-induced eosinophilic lung inflammation to corticoid refractory neutrophilic manifestation.

Teaser

Sleep plays a pivotal role in immune system homeostasis. Sleep disturbances influence immune-mediated allergic responses and improving sleep quality may contribute to asthma management.


http://ift.tt/2uB3znJ