Publikationsdatenbank

Immunization with excretory‐secretory molecules of intestinal nematodes induces antigen‐specific protective memory Th2 cell responses (2023)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Yordanova, Ivet A.

Elizalde‐Velázquez, Luis E. (WE 6)

Hartmann, Susanne (WE 6)

Quelle

European journal of immunology : basic, clinical, translational

Bandzählung: 53

Heftzählung: 5

Seiten: Artikel 2250237

ISSN: 1521-4141

Sprache

Englisch

Verweise

URL (Volltext): https://onlinelibrary.wiley.com/doi/10.1002/eji.202250237

DOI: 10.1002/eji.202250237

Pubmed: 36781418

Kontakt

Institut für Immunologie

Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 51834
immunologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Parasitic nematodes infect more than 1 billion people in the global south. The development of effective anti-helminthic vaccines is a crucial tool for their future elimination. Protective immune responses to nematodes depend on Gata3+ Th2 cells, which can also be induced by nematode-released products. Whether these nematode products induce antigen-specific long-lived memory T cells and thereby confer protection against a challenge infection is not known yet. Hence, we set out to characterize the formation of memory Th2 cells induced by immunization with Heligmosomoides polygyrus excretory-secretory products (HES), infection-induced versus immunization-induced recall responses to a challenge infection and whether HES-induced memory T cells show protective properties following adoptive transfer. Our results show that 8 weeks post-immunization, HES induces long-lived functional memory Th2 cells at the site of immunization in the peritoneal cavity. Following a H. polygyrus challenge infection, HES-immunized mice display MHC-II-dependent antigen-specific Th2 cytokine responses in the gut-draining lymph nodes, comparable to those induced by a prior natural infection. Moreover, adoptive transfer of sorted memory CD4+ T cells from HES-immunized donors reduces female worm fecundity following a challenge H. polygyrus infection in recipient mice, highlighting a protective role for immunization-induced memory T cells.