Abstract:
:Marine omega-3 polyunsaturated fatty acids (MO3PUFAs) have anticancer properties and may improve colon cancer survival. However, it remains unknown whether the benefit differs by tumor molecular subtype. We examined data from a phase III randomized trial of FOLFOX or FOLFOX + cetuximab among 1,735 stage III colon cancer patients who completed a dietary questionnaire at enrollment. Multivariable hazard ratios and 95% confidence intervals (CIs) were calculated for the association between MO3PUFA and disease-free survival (DFS) and overall survival according to KRAS and BRAFV600E mutations and DNA mismatch repair (MMR) status. Higher MO3PUFA intake was associated with improved 3-year DFS for KRAS wild-type tumors (77% vs. 73%; HR: 0.84; 95% CI: 0.67-1.05) but not KRAS-mutant tumors (64% vs. 70%; HR: 1.30; 95% CI: 0.97-1.73; Pinteraction = 0.02). Similar heterogeneity was found by MMR (Pinteraction = 0.14): higher MO3PUFA was associated with better 3-year DFS for tumors with deficient MMR (72% vs. 67%) but not proficient MMR (72% vs. 72%). No heterogeneity was found by BRAFV600E mutation. Similar findings were obtained for overall survival. In conclusion, we found a suggestive beneficial association between higher MO3PUFA intake and improved survival among stage III colon cancer patients with wild-type KRAS and deficient MMR. Given the relatively small number of cases with tumor molecular assessments, further studies, preferably through pooled analyses of multiples cohorts, are needed to validate our findings.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Song M,Ou FS,Zemla TJ,Hull MA,Shi Q,Limburg PJ,Alberts SR,Sinicrope FA,Giovannucci EL,Van Blarigan EL,Meyerhardt JA,Chan ATdoi
10.1002/ijc.32113subject
Has Abstractpub_date
2019-07-15 00:00:00pages
380-389issue
2eissn
0020-7136issn
1097-0215journal_volume
145pub_type
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