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Intestinal helminth infections are common and of paramount economic importance in domestic animals. Available chemotherapy is limited and anthelmintic resistance is widespread in some hosts. This scenario favors the exploration of alternative methods of control, among them immune modulators. The effect of Escherichia coli LPS+Propionibacterium acnes on a primary infection of Heligmosomoides polygyrus (Trichostongyloidea) in mice has been tested. Nematode infection induced a rise of specific IgG1, both serum and intestinal, and a significant reduction in the unspecific (ConA) lymphoproliferative response. Treatment with the immune modulator (days -2, 0, 7 and 14 post infection) elicited an apparent delay of larval intramucosal development. Moreover cumulative nematode egg shedding in treated mice was significantly lower (p=0.0041). Preliminary results point toward the interest of immune modulators to control intestinal helminths.
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http://dx.doi.org/10.1016/j.vetpar.2014.02.026 | DOI Listing |
Sci Rep
August 2025
Laboratory of Animal Food Function, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, 980-8572, Japan.
Gastrointestinal nematode infections elicit robust type 2 immune responses that facilitate rapid parasite expulsion. Our previous studies demonstrated that 18-month-old mice exhibit both impaired nematode clearance and reduced type 2-cytokine production, suggesting that aging diminishes the host's potential to mount effective immune defenses. To further investigate the underlying mechanisms, we compared young (3 months old) and aged mice (18 months old) infected with the nematode Heligmosomoides polygyrus (Hp), focusing on the interplay between type 2 immune responses and intestinal ecology.
View Article and Find Full Text PDFACS Infect Dis
July 2025
Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Kreuzstrasse 2, CH-4123 Allschwil, Switzerland.
An estimated 1.5 billion people worldwide are infected with at least one parasitic nematode species classified as soil-transmitted helminths (STHs). The recommended control strategy is to reduce morbidity using a single oral dose of the benzimidazole drugs, albendazole and mebendazole.
View Article and Find Full Text PDFbioRxiv
June 2025
Department of Nematology, University of California, Riverside, California, 92521, USA.
Parasitic nematodes are major pathogens of humans, animals, and plants, contributing to global health challenges and substantial agricultural losses. Fatty acid- and retinol-binding proteins (FARs), secreted by parasitic nematodes, are believed to play key roles in host-pathogen interactions, including immune modulation and nutrient acquisition. In this study, we characterize a FAR protein from the gastrointestinal nematode , Hp-FAR-2.
View Article and Find Full Text PDFJ Lipid Res
July 2025
Cardiff University, School of Medicine, Cardiff, UK.
Oxylipins derived from dietary polyunsaturated fatty acids (PUFAs) are key determinants of intestinal health, homeostasis, and inflammatory disorders, such as colitis-associated colorectal cancer. Previous research has independently linked a high dietary omega (ω)-6:ω-3 PUFA ratio, or intestinal helminth infection, to an increased risk of colitis-associated colorectal cancer. However, whether these two factors interact to exacerbate disease risk and whether oxylipins contribute to this is unknown.
View Article and Find Full Text PDFTrends Parasitol
July 2025
Type 2 Immunity Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD 20892, USA; Immune Priming Unit, Type 2 Immunity Section, Laboratory of Parasitic Diseases, National Institute of Allergy and In
IFN-γ function during a type-2 helminth infection remains enigmatic. Westfall et al. found an unexpected role for IFN-γ in limiting tissue damage during intestinal infection by Heligmosomoides polygyrus bakeri (Hpb).
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