Metabolic syndrome and risk of colorectal cancer: A Mendelian randomization study
Yuhua Chen,
Wanru Kong,
Min Liu,
Qiang Li,
Yuping Wang,
Ya Zheng,
Yongning Zhou
Affiliations
Yuhua Chen
The First Clinical Medical College, Lanzhou University, Lanzhou, China; Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China
Wanru Kong
Department of Infection Management, Gansu Provincial Hospital, Lanzhou, 730000, China
Min Liu
Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China
Qiang Li
Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China
Yuping Wang
Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China
Ya Zheng
Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China; Corresponding author. Key Laboratory for Gastrointestinal Diseases of Gansu Province, Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, 730000, Gansu, China.
Yongning Zhou
Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, China; Corresponding author. Key Laboratory for Gastrointestinal Diseases of Gansu Province, Department of Gastroenterology, The First Hospital of Lanzhou University, Lanzhou, 730000, Gansu, China.
Background: Observational studies have previously demonstrated a significant relationship among both metabolic syndrome (Mets) and colorectal cancer (CRC). Whether there is a causal link remains controversial. Objective: To clarify whether Mets and their components have a causal effect on colorectal cancer, we have carried out a bidirectional Mendelian randomization analysis (MR). Methods: This study started from genome-wide association data for Mets and its 5 components (hypertension, waist circumference, fasting blood glucose, serum triglycerides, and serum high-density lipoprotein cholesterol) and colorectal cancer. Mendelian randomization (MR) techniques were used in the study to examine their associations. Results: After Benjamini-Hochberg multiple corrections, genetically predicted significant causal link exists between WC (waist circumference) and CRC. The OR was 1.35 (95 % CI: 1.08–1.69; p = 0.0096). Other Mets components (HBP, FBG, TG, HDL), on the other hand, found no evidence of a genetic link between CRC and Mets. In addition, MR results showed that CRC was not causally related to either Mets or the components. We get the same result in the validated dataset. Conclusion: According to the bidirectional MR investigation shows a significant causal relationship among obesity and CRC in the Mets component but no causal relationship in the opposite direction.
