Article (Scientific journals)
Helminth-induced prostaglandin signaling and dietary shifts in PUFA metabolism promote colitis-associated cancer.
Smith, Katherine A; Reed, Ella K; Guschina, Irina et al.
2025In Journal of Lipid Research, 66 (7), p. 100837
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Keywords :
arachidonic acid; cell signaling; colon; lipolysis and fatty acid metabolism; lipoxygenase; omega-3 fatty acids; phospholipids/metabolism; prostaglandins; Alox15 protein, mouse; Alox5 protein, mouse; Arachidonate Lipoxygenases; Aspirin; Cyclooxygenase Inhibitors; Dextran Sulfate; Fatty Acids, Omega-3; Fatty Acids, Omega-6; Oxylipins; Prostaglandin-Endoperoxide Synthases; Prostaglandins; Arachidonate 12-Lipoxygenase; Arachidonate 15-Lipoxygenase; Arachidonate 5-Lipoxygenase; Animals; Female; Mice; Arachidonate Lipoxygenases/metabolism; Aspirin/therapeutic use; Cell Line, Tumor; Colitis/chemically induced; Colitis/complications; Colon/metabolism; Colon/parasitology; Cyclooxygenase Inhibitors/therapeutic use; Host-Parasite Interactions; Lipidomics; Nematospiroides dubius/physiology; Prostaglandin-Endoperoxide Synthases/metabolism; Fatty Acids, Omega-3/administration & dosage; Fatty Acids, Omega-3/metabolism; Fatty Acids, Omega-6/administration & dosage; Fatty Acids, Omega-6/metabolism; Oxylipins/metabolism; Prostaglandins/metabolism; Strongylida Infections/complications; Colitis-Associated Neoplasms/metabolism; Colitis-Associated Neoplasms/parasitology; Colitis-Associated Neoplasms/prevention & control
Abstract :
[en] 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. In this study, we report that infection with the helminth Heligmosomoides polygyrus bakeri (Hpb) exacerbates tumor formation when combined with a high ω-6:ω-3 PUFA ratio diet. Dietary increases in tumor burden correlated with heightened levels of arachidonic acid (AA) and AA-derived lipoxygenase (LOX) oxylipins in the colon, including the 12/15-LOX product 12-hydroxyeicosatetraenoic acid, prior to disease onset. Although helminth infection further increased the production of 12/15-LOX oxylipins and increased expression of Alox15, responsible for producing these metabolites, inhibition of cyclooxygenase-dependent prostaglandin production with aspirin prevented helminth-exacerbation of disease. Helminth-infected mice exhibited increased phosphorylation of β-catenin in the colon, which was inhibited by EP2 and 4 antagonists. Moreover, administration of an EP agonist increased tumor burden in naive mice fed a high ω-6:ω-3 PUFA ratio diet, to the levels seen in helminth-exacerbation of disease. These data suggest that dietary changes in fatty acid composition coordinate with helminth-induced activation of EP signaling to exacerbate tumor development.
Disciplines :
Immunology & infectious disease
Author, co-author :
Smith, Katherine A ;  Cardiff University, School of Biosciences, Cardiff, UK. Electronic address: smithk28@cardiff.ac.uk
Reed, Ella K ;  Cardiff University, School of Biosciences, Cardiff, UK
Guschina, Irina ;  Cardiff University, School of Biosciences, Cardiff, UK
Tyrrell, Victoria J;  Cardiff University, School of Medicine, Cardiff, UK
Butters, Claire ;  University of Cape Town, Institute of Infectious Disease and Molecular Medicine, Cape Town, South Africa
Darby, Matthew G ;  University of Cape Town, Institute of Infectious Disease and Molecular Medicine, Cape Town, South Africa
Katsandegwaza, Brunette  ;  Université de Liège - ULiège > Fundamental and Applied Research for Animals and Health (FARAH) > FARAH: Santé publique vétérinaire
Chetty, Alisha;  University of Cape Town, Institute of Infectious Disease and Molecular Medicine, Cape Town, South Africa
Horsnell, William G C;  University of Exeter, Medical Research Council Centre for Medical Mycology, Exeter, UK
O'Donnell, Valerie B;  Cardiff University, School of Medicine, Cardiff, UK
Gallimore, Awen;  Cardiff University, School of Medicine, Cardiff, UK
Language :
English
Title :
Helminth-induced prostaglandin signaling and dietary shifts in PUFA metabolism promote colitis-associated cancer.
Publication date :
July 2025
Journal title :
Journal of Lipid Research
ISSN :
0022-2275
eISSN :
1539-7262
Publisher :
Elsevier, United States
Volume :
66
Issue :
7
Pages :
100837
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
CRUK - Cancer Research UK
EC - European Commission
NSF - National Science Foundation
Available on ORBi :
since 05 August 2025

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