1. Body size and risk of colorectal cancer molecular defined subtypes and pathways: Mendelian randomization analyses
- Author
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Papadimitriou, N, Qu, C, Harrison, TA, Bever, AM, Martin, RM, Tsilidis, KK, Newcomb, PA, Thibadeau, SN, Newton, CC, Um, CY, Obon-Santacana, M, Moreno, V, Brenner, H, Mandic, M, Chang-Claude, J, Hoffmeister, M, Pellatt, AJ, Schoen, RE, Harlid, S, Ogino, S, Ugai, T, Buchanan, DD, Lynch, BM, Gruber, SB, Cao, Y, Hsu, L, Huyghe, JR, Lin, Y, Steinfelder, RS, Sun, W, Van Guelpen, B, Zaidi, SH, Toland, AE, Berndt, SI, Huang, W-Y, Aglago, EK, Drew, DA, French, AJ, Georgeson, P, Giannakis, M, Hullar, M, Nowak, JA, Thomas, CE, LeMarchand, L, Cheng, I, Gallinger, S, Jenkins, MA, Gunter, MJ, Campbell, PT, Peters, U, Song, M, Phipps, AI, Murphya, N, Papadimitriou, N, Qu, C, Harrison, TA, Bever, AM, Martin, RM, Tsilidis, KK, Newcomb, PA, Thibadeau, SN, Newton, CC, Um, CY, Obon-Santacana, M, Moreno, V, Brenner, H, Mandic, M, Chang-Claude, J, Hoffmeister, M, Pellatt, AJ, Schoen, RE, Harlid, S, Ogino, S, Ugai, T, Buchanan, DD, Lynch, BM, Gruber, SB, Cao, Y, Hsu, L, Huyghe, JR, Lin, Y, Steinfelder, RS, Sun, W, Van Guelpen, B, Zaidi, SH, Toland, AE, Berndt, SI, Huang, W-Y, Aglago, EK, Drew, DA, French, AJ, Georgeson, P, Giannakis, M, Hullar, M, Nowak, JA, Thomas, CE, LeMarchand, L, Cheng, I, Gallinger, S, Jenkins, MA, Gunter, MJ, Campbell, PT, Peters, U, Song, M, Phipps, AI, and Murphya, N
- Abstract
BACKGROUND: Obesity has been positively associated with most molecular subtypes of colorectal cancer (CRC); however, the magnitude and the causality of these associations is uncertain. METHODS: We used Mendelian randomization (MR) to examine potential causal relationships between body size traits (body mass index [BMI], waist circumference, and body fat percentage) with risks of Jass classification types and individual subtypes of CRC (microsatellite instability [MSI] status, CpG island methylator phenotype [CIMP] status, BRAF and KRAS mutations). Summary data on tumour markers were obtained from two genetic consortia (CCFR, GECCO). FINDINGS: A 1-standard deviation (SD:5.1 kg/m2) increment in BMI levels was found to increase risks of Jass type 1MSI-high,CIMP-high,BRAF-mutated,KRAS-wildtype (odds ratio [OR]: 2.14, 95% confidence interval [CI]: 1.46, 3.13; p-value = 9 × 10-5) and Jass type 2non-MSI-high,CIMP-high,BRAF-mutated,KRAS-wildtype CRC (OR: 2.20, 95% CI: 1.26, 3.86; p-value = 0.005). The magnitude of these associations was stronger compared with Jass type 4non-MSI-high,CIMP-low/negative,BRAF-wildtype,KRAS-wildtype CRC (p-differences: 0.03 and 0.04, respectively). A 1-SD (SD:13.4 cm) increment in waist circumference increased risk of Jass type 3non-MSI-high,CIMP-low/negative,BRAF-wildtype,KRAS-mutated (OR 1.73, 95% CI: 1.34, 2.25; p-value = 9 × 10-5) that was stronger compared with Jass type 4 CRC (p-difference: 0.03). A higher body fat percentage (SD:8.5%) increased risk of Jass type 1 CRC (OR: 2.59, 95% CI: 1.49, 4.48; p-value = 0.001), which was greater than Jass type 4 CRC (p-difference: 0.03). INTERPRETATION: Body size was more strongly linked to the serrated (Jass types 1 and 2) and alternate (Jass type 3) pathways of colorectal carcinogenesis in comparison to the traditional pathway (Jass type 4). FUNDING: Cancer Research UK, National Institute for Health Research, Medical Research Council, National Institutes of Health, National Cancer Institute, Americ
- Published
- 2024