Antibodies trap tissue migrating helminth larvae and prevent tissue damage by driving IL-4Rα-independent alternative differentiation of macrophages.
Details
Serval ID
serval:BIB_75571141F8D6
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Antibodies trap tissue migrating helminth larvae and prevent tissue damage by driving IL-4Rα-independent alternative differentiation of macrophages.
Journal
PLoS pathogens
ISSN
1553-7374 (Electronic)
ISSN-L
1553-7366
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
9
Number
11
Pages
e1003771
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Abstract
Approximately one-third of the world's population suffers from chronic helminth infections with no effective vaccines currently available. Antibodies and alternatively activated macrophages (AAM) form crucial components of protective immunity against challenge infections with intestinal helminths. However, the mechanisms by which antibodies target these large multi-cellular parasites remain obscure. Alternative activation of macrophages during helminth infection has been linked to signaling through the IL-4 receptor alpha chain (IL-4Rα), but the potential effects of antibodies on macrophage differentiation have not been explored. We demonstrate that helminth-specific antibodies induce the rapid trapping of tissue migrating helminth larvae and prevent tissue necrosis following challenge infection with the natural murine parasite Heligmosomoides polygyrus bakeri (Hp). Mice lacking antibodies (JH (-/-)) or activating Fc receptors (FcRγ(-/-)) harbored highly motile larvae, developed extensive tissue damage and accumulated less Arginase-1 expressing macrophages around the larvae. Moreover, Hp-specific antibodies induced FcRγ- and complement-dependent adherence of macrophages to larvae in vitro, resulting in complete larval immobilization. Antibodies together with helminth larvae reprogrammed macrophages to express wound-healing associated genes, including Arginase-1, and the Arginase-1 product L-ornithine directly impaired larval motility. Antibody-induced expression of Arginase-1 in vitro and in vivo occurred independently of IL-4Rα signaling. In summary, we present a novel IL-4Rα-independent mechanism of alternative macrophage activation that is antibody-dependent and which both mediates anti-helminth immunity and prevents tissue disruption caused by migrating larvae.
Keywords
Animals, Antibodies, Helminth/genetics, Antibodies, Helminth/immunology, Arginase/genetics, Arginase/immunology, Cell Differentiation/genetics, Cell Differentiation/immunology, Gene Expression Regulation, Enzymologic/genetics, Gene Expression Regulation, Enzymologic/immunology, Larva, Macrophages/immunology, Mice, Mice, Knockout, Nematospiroides dubius/immunology, Receptors, Cell Surface/genetics, Receptors, Cell Surface/immunology, Signal Transduction/genetics, Signal Transduction/immunology, Strongylida Infections/genetics, Strongylida Infections/immunology
Pubmed
Web of science
Open Access
Yes
Create date
25/03/2025 14:41
Last modification date
26/03/2025 8:05