AustralieFrV1, Main, Exploration, bibRecord, 007A43

Anisakis pegreffii-Induced Airway Hyperresponsiveness Is Mediated by Gamma Interferon in the Absence of Interleukin-4 Receptor Alpha Responsiveness

Identifieur interne : 007A43 ( Main/Exploration ); précédent : 007A42; suivant : 007A44

Anisakis pegreffii-Induced Airway Hyperresponsiveness Is Mediated by Gamma Interferon in the Absence of Interleukin-4 Receptor Alpha Responsiveness

Auteurs : Frank Kirstein [Afrique du Sud] ; William G. C. Horsnell [Afrique du Sud] ; Natalie Nieuwenhuizen [Afrique du Sud] ; Bernhard Ryffel [France] ; Andreas L. Lopata [Afrique du Sud, Australie] ; Frank Brombacher [Afrique du Sud]

Source :

Infection and immunity [ 0019-9567 ] ; 2010.

RBID : Pascal:10-0423953

Descripteurs français

Pascal (Inist)
- Voie respiratoire, Interleukine 4, Immunité, Interféron gamma.

English descriptors

KwdEn :
- Gamma interferon, Immunity, Interleukin 4, Respiratory tract.

Abstract

Infection with the fish parasite Anisakis following exposure to contaminated fish can lead to allergic reactions in humans. The present study examined the immunological mechanisms underlying the development of allergic airway inflammation in mice after different routes of sensitization to Anisakis. Wild-type and interleukin-4 receptor alpha (IL-4Rα)-deficient BALB/c mice were sensitized intraperitoneally with live or heat-killed Anisakis larvae or by intranasal administration of an Anisakis extract and were subsequently challenged intranasally with an Anisakis extract. Both routes of sensitization induced IL-4Rα-dependent allergic airway responses, whereas allergen-specific antibody responses developed only when mice were sensitized intraperitoneally. Intranasal sensitization induced airway hyperresponsiveness (AHR) in wild-type mice only, showing that AHR was IL-4/IL-13 dependent. Unexpectedly, infection with Anisakis larvae induced AHR in both wild-type and IL-4Rα-deficient mice. IL-4Rα-independent AHR was mediated by gamma interferon (IFN-γ), as evidenced by the fact that in vivo neutralization of IFN-γ abrogated AHR. Together, these results demonstrate that both infection with larvae and inhalational exposure to Anisakis proteins are potent routes of allergic sensitization to Anisakis, explaining food- and work-related allergies in humans. Importantly for diagnosis, allergic airway inflammation can be independent of detectable Anisakis-specific antibodies. Moreover, depending on the route of sensitization, AHR can be induced either by IL-4/IL-13 or by IFN-γ.

Affiliations:

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<front><div type="abstract" xml:lang="en">Infection with the fish parasite Anisakis following exposure to contaminated fish can lead to allergic reactions in humans. The present study examined the immunological mechanisms underlying the development of allergic airway inflammation in mice after different routes of sensitization to Anisakis. Wild-type and interleukin-4 receptor alpha (IL-4Rα)-deficient BALB/c mice were sensitized intraperitoneally with live or heat-killed Anisakis larvae or by intranasal administration of an Anisakis extract and were subsequently challenged intranasally with an Anisakis extract. Both routes of sensitization induced IL-4Rα-dependent allergic airway responses, whereas allergen-specific antibody responses developed only when mice were sensitized intraperitoneally. Intranasal sensitization induced airway hyperresponsiveness (AHR) in wild-type mice only, showing that AHR was IL-4/IL-13 dependent. Unexpectedly, infection with Anisakis larvae induced AHR in both wild-type and IL-4Rα-deficient mice. IL-4Rα-independent AHR was mediated by gamma interferon (IFN-γ), as evidenced by the fact that in vivo neutralization of IFN-γ abrogated AHR. Together, these results demonstrate that both infection with larvae and inhalational exposure to Anisakis proteins are potent routes of allergic sensitization to Anisakis, explaining food- and work-related allergies in humans. Importantly for diagnosis, allergic airway inflammation can be independent of detectable Anisakis-specific antibodies. Moreover, depending on the route of sensitization, AHR can be induced either by IL-4/IL-13 or by IFN-γ.</div>
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<country name="Australie"><region name="Victoria (État)"><name sortKey="Lopata, Andreas L" sort="Lopata, Andreas L" uniqKey="Lopata A" first="Andreas L." last="Lopata">Andreas L. Lopata</name>
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Anisakis pegreffii-Induced Airway Hyperresponsiveness Is Mediated by Gamma Interferon in the Absence of Interleukin-4 Receptor Alpha Responsiveness

Anisakis pegreffii-Induced Airway Hyperresponsiveness Is Mediated by Gamma Interferon in the Absence of Interleukin-4 Receptor Alpha Responsiveness

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri