Loading…
An anti-inflammatory eicosanoid switch mediates the suppression of type-2 inflammation by helminth larval products
Eicosanoids are key mediators of type-2 inflammation, e.g., in allergy and asthma. Helminth products have been suggested as remedies against inflammatory diseases, but their effects on eicosanoids are unknown. Here, we show that larval products of the helminth ( ), known to modulate type-2 responses...
Saved in:
Published in: | Science translational medicine 2020-04, Vol.12 (540), p.1 |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Eicosanoids are key mediators of type-2 inflammation, e.g., in allergy and asthma. Helminth products have been suggested as remedies against inflammatory diseases, but their effects on eicosanoids are unknown. Here, we show that larval products of the helminth
(
), known to modulate type-2 responses, trigger a broad anti-inflammatory eicosanoid shift by suppressing the 5-lipoxygenase pathway, but inducing the cyclooxygenase (COX) pathway. In human macrophages and granulocytes, the
-driven induction of the COX pathway resulted in the production of anti-inflammatory mediators [e.g., prostaglandin E
(PGE
) and IL-10] and suppressed chemotaxis.
also abrogated the chemotaxis of granulocytes from patients suffering from aspirin-exacerbated respiratory disease (AERD), a severe type-2 inflammatory condition. Intranasal treatment with
extract attenuated allergic airway inflammation in mice, and intranasal transfer of
-conditioned macrophages led to reduced airway eosinophilia in a COX/PGE
-dependent fashion. The induction of regulatory mediators in macrophages depended on p38 mitogen-activated protein kinase (MAPK), hypoxia-inducible factor-1α (HIF-1α), and
glutamate dehydrogenase (GDH), which we identify as a major immunoregulatory protein in
GDH activity was required for anti-inflammatory effects of
in macrophages, and local administration of recombinant
GDH to the airways abrogated allergic airway inflammation in mice. Thus, a metabolic enzyme present in helminth larvae can suppress type-2 inflammation by inducing an anti-inflammatory eicosanoid switch, which has important implications for the therapy of allergy and asthma. |
---|---|
ISSN: | 1946-6234 1946-6242 1946-6242 1946-3242 |
DOI: | 10.1126/scitranslmed.aay0605 |