TY - JOUR AU - Papadimitriou, Nikos AU - Murphy, Neil AU - Jenab, Mazda AU - Chen, Zhishan AU - Brenner, Hermann AU - Kweon, Sun-Seog AU - Le Marchand, Loic AU - Moreno, Victor AU - Platz, Elizabeth A AU - van Duijnhoven, Fränzel J B AU - Cheng, Iona AU - Pai, Rish K AU - Phipps, Amanda I AU - Peters, Ulrike AU - Zheng, Wei AU - Hughes, David J TI - Body mass index at birth and early life and colorectal cancer: A two-sample Mendelian randomization analysis in European and East Asian genetic similarity populations. JO - Pediatric obesity VL - 20 IS - 1 SN - 2047-6302 CY - Malden, Mass. PB - Wiley M1 - DKFZ-2024-02423 SP - e13186 PY - 2025 N1 - 2025 Jan;20(1):e13186 AB - Varying obesogenic inherited predisposition in early to later life may differentially impact colorectal cancer (CRC) development. Previous Mendelian randomization (MR) studies, conducted in populations of European genetic similarity, have not observed any significant associations between early life body weight with CRC risk. However, it remains unclear whether body mass index (BMI) at different early lifetime points is causally related with CRC risk in both Europeans and East Asian populations.We conducted a two-sample MR study to investigate potential causal relationships between genetically predicted BMI during early life (birth to 8 years old) and at specific periods (birth, transient, early rise and late rise) and CRC risk.Summary data were obtained from genome-wide association study (GWAS) of BMI in 28 681 children from the Norwegian Mother, Father and Child Cohort Study (MoBa) study and applied to CRC GWAS data from European and East Asian descent populations (102 893 cases and 485 083 non-cases).There were no significant associations observed between early life BMI and CRC risk in European or East Asian populations. The effect estimates were similar in European studies (odds ratio [OR] per a 1-standard deviation [SD] increase: 1.01, 95 KW - colorectal cancer (Other) KW - early life (Other) KW - mendelian randomization (Other) KW - obesity (Other) LB - PUB:(DE-HGF)16 C6 - pmid:39587448 DO - DOI:10.1111/ijpo.13186 UR - https://inrepo02.dkfz.de/record/294688 ER -