Parasitic nematode-induced CD4+Foxp3+T cells can ameliorate allergic airway inflammation.

The recruitment of CD4+CD25+Foxp3+T (Treg) cells is one of the most important mechanisms by which parasites down-regulate the immune system.We compared the effects of Treg cells from Trichinella spiralis-infected mice and uninfected mice on experimental allergic airway inflammation in order to understand the functions of parasite-induced Treg cells. After four weeks of T. spiralis infection, we isolated Foxp3-GFP-expressing cells from transgenic mice using a cell sorter. We injected CD4+Foxp3+ cells from T. spiralis-infected [Inf(+)Foxp3+] or uninfected [Inf(-)Foxp3+] mice into the tail veins of C57BL/6 mice before the induction of inflammation or during inflammation. Inflammation was induced by ovalbumin (OVA)-alum sensitization and OVA challenge. The concentrations of the Th2-related cytokines IL-4, IL-5, and IL-13 in the bronchial alveolar lavage fluid and the levels of OVA-specific IgE and IgG1 in the serum were lower in mice that received intravenous application of Inf(+)Foxp3+ cells [IV(inf):+(+) group] than in control mice. Some features of allergic airway inflammation were ameliorated by the intravenous application of Inf(-)Foxp3+ cells [IV(inf):+(-) group], but the effects were less distinct than those observed in the IV(inf):+(+) group. We found that Inf(+)Foxp3+ cells migrated to inflammation sites in the lung and expressed higher levels of Treg-cell homing receptors (CCR5 and CCR9) and activation markers (Klrg1, Capg, GARP, Gzmb, OX40) than did Inf(-)Foxp3+ cells.T. spiralis infection promotes the proliferation and functional activation of Treg cells. Parasite-induced Treg cells migrate to the inflammation site and suppress immune responses more effectively than non-parasite-induced Treg cells. The adoptive transfer of Inf(+)Foxp3+ cells is an effective method for the treatment and prevention of allergic airway diseases in mice and is a promising therapeutic approach for the treatment of allergic airway diseases..

Medienart:

E-Artikel

Erscheinungsjahr:

2014

Erschienen:

2014

Enthalten in:

Zur Gesamtaufnahme - volume:8

Enthalten in:

PLoS Neglected Tropical Diseases - 8(2014), 12, p e3410

Sprache:

Englisch

Beteiligte Personen:

Shin Ae Kang [VerfasserIn]
Mi-Kyung Park [VerfasserIn]
Min Kyoung Cho [VerfasserIn]
Sang Kyun Park [VerfasserIn]
Min Seong Jang [VerfasserIn]
Bo-Gie Yang [VerfasserIn]
Myoung Ho Jang [VerfasserIn]
Dong-Hee Kim [VerfasserIn]
Hak Sun Yu [VerfasserIn]

Links:

doi.org [kostenfrei]
doaj.org [kostenfrei]
europepmc.org [kostenfrei]
Journal toc [kostenfrei]
Journal toc [kostenfrei]

Themen:

Arctic medicine. Tropical medicine
Public aspects of medicine

doi:

10.1371/journal.pntd.0003410

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

DOAJ044686145