RGD Reference Report - Estrogen determines sex differences in airway responsiveness after allergen exposure. - Rat Genome Database

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Estrogen determines sex differences in airway responsiveness after allergen exposure.

Authors: Matsubara, S  Swasey, CH  Loader, JE  Dakhama, A  Joetham, A  Ohnishi, H  Balhorn, A  Miyahara, N  Takeda, K  Gelfand, EW 
Citation: Matsubara S, etal., Am J Respir Cell Mol Biol. 2008 May;38(5):501-8. Epub 2007 Dec 6.
RGD ID: 5147833
Pubmed: PMID:18063836   (View Abstract at PubMed)
PMCID: PMC2335333   (View Article at PubMed Central)
DOI: DOI:10.1165/rcmb.2007-0298OC   (Journal Full-text)

The female hormone estrogen is an important factor in the regulation of airway function and inflammation, and sex differences in the prevalence of asthma are well described. Using an animal model, we determined how sex differences may underlie the development of altered airway function in response to allergen exposure. We compared sex differences in the development of airway hyperresponsiveness (AHR) after allergen exposure exclusively via the airways. Ovalbumin (OVA) was administered by nebulization on 10 consecutive days in BALB/c mice. After methacholine challenge, significant AHR developed in male mice but not in female mice. Ovariectomized female mice showed significant AHR after 10-day OVA inhalation. ICI182,780, an estrogen antagonist, similarly enhanced airway responsiveness even when administered 1 hour before assay. In contrast, 17beta-estradiol dose-dependently suppressed AHR in male mice. In all cases, airway responsiveness was inhibited by the administration of a neurokinin 1 receptor antagonist. These results demonstrate that sex differences in 10-day OVA-induced AHR are due to endogenous estrogen, which negatively regulates airway responsiveness in female mice. Cumulatively, the results suggest that endogenous estrogen may regulate the neurokinin 1-dependent prejunctional activation of airway smooth muscle in allergen-exposed mice.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
TACR1HumanBronchial Hyperreactivity  ISOTacr1 (Rattus norvegicus) RGD 
Tacr1RatBronchial Hyperreactivity  IMP  RGD 
Tacr1MouseBronchial Hyperreactivity  ISOTacr1 (Rattus norvegicus) RGD 

Objects Annotated

Genes (Rattus norvegicus)
Tacr1  (tachykinin receptor 1)

Genes (Mus musculus)
Tacr1  (tachykinin receptor 1)

Genes (Homo sapiens)
TACR1  (tachykinin receptor 1)


Additional Information