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. 2024 Jun:104:105146.
doi: 10.1016/j.ebiom.2024.105146. Epub 2024 May 14.

Genome-wide interaction study of dietary intake of fibre, fruits, and vegetables with risk of colorectal cancer

Nikos Papadimitriou  1 Andre Kim  2 Eric S Kawaguchi  2 John Morrison  2 Virginia Diez-Obrero  3 Demetrius Albanes  4 Sonja I Berndt  4 Stéphane Bézieau  5 Stephanie A Bien  6 D Timothy Bishop  7 Emmanouil Bouras  8 Hermann Brenner  9 Daniel D Buchanan  10 Peter T Campbell  11 Robert Carreras-Torres  12 Andrew T Chan  13 Jenny Chang-Claude  14 David V Conti  2 Matthew A Devall  15 Niki Dimou  1 David A Drew  16 Stephen B Gruber  17 Tabitha A Harrison  6 Michael Hoffmeister  18 Jeroen R Huyghe  6 Amit D Joshi  19 Temitope O Keku  20 Anshul Kundaje  21 Sébastien Küry  5 Loic Le Marchand  22 Juan Pablo Lewinger  2 Li Li  23 Brigid M Lynch  24 Victor Moreno  3 Christina C Newton  25 Mireia Obón-Santacana  26 Jennifer Ose  27 Andrew J Pellatt  28 Anita R Peoples  27 Elizabeth A Platz  29 Conghui Qu  6 Gad Rennert  30 Edward Ruiz-Narvaez  31 Anna Shcherbina  32 Mariana C Stern  2 Yu-Ru Su  6 Duncan C Thomas  2 Claire E Thomas  6 Yu Tian  33 Konstantinos K Tsilidis  34 Cornelia M Ulrich  27 Caroline Y Um  25 Kala Visvanathan  29 Jun Wang  35 Emily White  36 Michael O Woods  37 Stephanie L Schmit  38 Finlay Macrae  39 John D Potter  6 John L Hopper  40 Ulrike Peters  41 Neil Murphy  1 Li Hsu  42 Marc J Gunter  43 W James Gauderman  44
Affiliations

Genome-wide interaction study of dietary intake of fibre, fruits, and vegetables with risk of colorectal cancer

Nikos Papadimitriou et al. EBioMedicine. 2024 Jun.

Abstract

Background: Consumption of fibre, fruits and vegetables have been linked with lower colorectal cancer (CRC) risk. A genome-wide gene-environment (G × E) analysis was performed to test whether genetic variants modify these associations.

Methods: A pooled sample of 45 studies including up to 69,734 participants (cases: 29,896; controls: 39,838) of European ancestry were included. To identify G × E interactions, we used the traditional 1--degree-of-freedom (DF) G × E test and to improve power a 2-step procedure and a 3DF joint test that investigates the association between a genetic variant and dietary exposure, CRC risk and G × E interaction simultaneously.

Findings: The 3-DF joint test revealed two significant loci with p-value <5 × 10-8. Rs4730274 close to the SLC26A3 gene showed an association with fibre (p-value: 2.4 × 10-3) and G × fibre interaction with CRC (OR per quartile of fibre increase = 0.87, 0.80, and 0.75 for CC, TC, and TT genotype, respectively; G × E p-value: 1.8 × 10-7). Rs1620977 in the NEGR1 gene showed an association with fruit intake (p-value: 1.0 × 10-8) and G × fruit interaction with CRC (OR per quartile of fruit increase = 0.75, 0.65, and 0.56 for AA, AG, and GG genotype, respectively; G × E -p-value: 0.029).

Interpretation: We identified 2 loci associated with fibre and fruit intake that also modify the association of these dietary factors with CRC risk. Potential mechanisms include chronic inflammatory intestinal disorders, and gut function. However, further studies are needed for mechanistic validation and replication of findings.

Funding: National Institutes of Health, National Cancer Institute. Full funding details for the individual consortia are provided in acknowledgments.

Keywords: Colorectal cancer; Diet; Fibre; GWAS; Gene-environment interaction.

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Conflict of interest statement

Declaration of interests ESK is a co-investigator in a grant from National Institutes of Health (R01CA196569). JW is Stock shareholder of Gilead Sciences Inc. AK has received consulting fees for Illumina Inc., has participated on data safety monitoring boards or advisory boards of TensorBio, PatchBio, Serimmune, and OpenTargets, and has stock or stock options of Illumina, Freenome, Deep Genomics, Immunai, TensorBio, PatchBio, and Serimmune. MCS was a co-investigator in a grant from National Institutes of Health (R01CA201407). VM has received grant support from Instituto de Salud Carlos III and Fundacion Cientifica Asociación Española Contra el Cáncer. SBG is a co-founder of Brogent international LLC. JPL has received additional grant support (5P01CA196569, 6R01CA201407). The remaining authors declare that they have no conflicts of interest.

Figures

Fig. 1
Fig. 1
Results from meta-analysis of association between (a) fibre, fruits, vegetables, and colorectal cancer, overall and stratified by sex and tumour site. Models adjusted for age, sex, and total energy intake. Intake of fibre (g/day), fruits, and vegetables (servings per day) were coded as median of intake sex/study specific quartiles, modelled as continuous variables.

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