Mendelian Randomization of Circulating Polyunsaturated Fatty Acids and Colorectal Cancer Risk.
Aged
Anti-Inflammatory Agents, Non-Steroidal
/ therapeutic use
Arachidonic Acid
/ blood
Case-Control Studies
Colorectal Neoplasms
/ blood
Cyclooxygenase 2
/ genetics
Datasets as Topic
Eicosapentaenoic Acid
/ blood
Fatty Acids, Unsaturated
/ blood
Female
Genome-Wide Association Study
Humans
Male
Mendelian Randomization Analysis
Middle Aged
Polymorphism, Single Nucleotide
Protective Factors
Risk Assessment
/ statistics & numerical data
Risk Factors
White People
/ genetics
Journal
Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology
ISSN: 1538-7755
Titre abrégé: Cancer Epidemiol Biomarkers Prev
Pays: United States
ID NLM: 9200608
Informations de publication
Date de publication:
04 2020
04 2020
Historique:
received:
26
07
2019
revised:
03
10
2019
accepted:
23
01
2020
pubmed:
14
2
2020
medline:
7
7
2021
entrez:
14
2
2020
Statut:
ppublish
Résumé
Results from epidemiologic studies examining polyunsaturated fatty acids (PUFA) and colorectal cancer risk are inconsistent. Mendelian randomization may strengthen causal inference from observational studies. Given their shared metabolic pathway, examining the combined effects of aspirin/NSAID use with PUFAs could help elucidate an association between PUFAs and colorectal cancer risk. Information was leveraged from genome-wide association studies (GWAS) regarding PUFA-associated SNPs to create weighted genetic scores (wGS) representing genetically predicted circulating blood PUFAs for 11,016 non-Hispanic white colorectal cancer cases and 13,732 controls in the Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO). Associations per SD increase in the wGS were estimated using unconditional logistic regression. Interactions between PUFA wGSs and aspirin/NSAID use on colorectal cancer risk were also examined. Modest colorectal cancer risk reductions were observed per SD increase in circulating linoleic acid [OR Our study suggests that higher circulating shorter-chain PUFAs (i.e., LA and ALA) were associated with reduced colorectal cancer risk, whereas longer-chain PUFAs (i.e., AA, EPA, and DPA) were associated with an increased colorectal cancer risk. The interaction of PUFAs with aspirin/NSAID use indicates a shared colorectal cancer inflammatory pathway. Future research should continue to improve PUFA genetic instruments to elucidate the independent effects of PUFAs on colorectal cancer.
Sections du résumé
BACKGROUND
Results from epidemiologic studies examining polyunsaturated fatty acids (PUFA) and colorectal cancer risk are inconsistent. Mendelian randomization may strengthen causal inference from observational studies. Given their shared metabolic pathway, examining the combined effects of aspirin/NSAID use with PUFAs could help elucidate an association between PUFAs and colorectal cancer risk.
METHODS
Information was leveraged from genome-wide association studies (GWAS) regarding PUFA-associated SNPs to create weighted genetic scores (wGS) representing genetically predicted circulating blood PUFAs for 11,016 non-Hispanic white colorectal cancer cases and 13,732 controls in the Genetics and Epidemiology of Colorectal Cancer Consortium (GECCO). Associations per SD increase in the wGS were estimated using unconditional logistic regression. Interactions between PUFA wGSs and aspirin/NSAID use on colorectal cancer risk were also examined.
RESULTS
Modest colorectal cancer risk reductions were observed per SD increase in circulating linoleic acid [OR
CONCLUSIONS
Our study suggests that higher circulating shorter-chain PUFAs (i.e., LA and ALA) were associated with reduced colorectal cancer risk, whereas longer-chain PUFAs (i.e., AA, EPA, and DPA) were associated with an increased colorectal cancer risk.
IMPACT
The interaction of PUFAs with aspirin/NSAID use indicates a shared colorectal cancer inflammatory pathway. Future research should continue to improve PUFA genetic instruments to elucidate the independent effects of PUFAs on colorectal cancer.
Identifiants
pubmed: 32051193
pii: 1055-9965.EPI-19-0891
doi: 10.1158/1055-9965.EPI-19-0891
pmc: PMC7125012
mid: NIHMS1554651
doi:
Substances chimiques
Anti-Inflammatory Agents, Non-Steroidal
0
Fatty Acids, Unsaturated
0
Arachidonic Acid
27YG812J1I
Eicosapentaenoic Acid
AAN7QOV9EA
Cyclooxygenase 2
EC 1.14.99.1
PTGS2 protein, human
EC 1.14.99.1
docosapentaenoic acid
NS3OZT14QT
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
860-870Subventions
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Informations de copyright
©2020 American Association for Cancer Research.
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