Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study
Previous observational case-control studies have shown significant controversy over the impact of dietary intake-related circulating antioxidants on the risk of digestive system tumors. We conducted a two-sample Mendelian randomized (MR) analysis to determine whether there was a significant causal r...
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MDPI AG
2022-08-01
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| Series: | Nutrients |
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| Online Access: | https://www.mdpi.com/2072-6643/14/16/3274 |
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| author | Linlin Yin Haihao Yan Kangdi Chen Zuhong Ji Xiuhua Zhang Guozhong Ji Bin Zhang |
| author_facet | Linlin Yin Haihao Yan Kangdi Chen Zuhong Ji Xiuhua Zhang Guozhong Ji Bin Zhang |
| author_sort | Linlin Yin |
| collection | DOAJ |
| description | Previous observational case-control studies have shown significant controversy over the impact of dietary intake-related circulating antioxidants on the risk of digestive system tumors. We conducted a two-sample Mendelian randomized (MR) analysis to determine whether there was a significant causal relationship between increased levels of circulating antioxidants and digestive system tumors. Our circulating antioxidants (vitamin C, carotenoids, vitamin A, and vitamin E) were derived from absolute circulating antioxidants and circulating antioxidant metabolites, and their corresponding instrumental variables were screened from published studies. The digestive system tumors we studied included colorectal, gastric, pancreatic, liver, and esophageal cancer, and the corresponding summary GAWS (genome-wide association study) data were obtained from the UK Biobank database. We first evaluated the causal relationship between each tumor and circulating antioxidants and then used meta-analysis to summarize the results of MR analysis of different tumors. No significant associations were noted for genetically predicted circulating antioxidants and higher risk of digestive system tumors in our study. The pooled ORs (odds ratio) are 0.72 (95% CI: 0.46–1.11; β-carotene), 0.93 (95% CI: 0.81–1.08; lycopene), 2.12 (95% CI: 0.31–14.66; retinol), and 0.99 (95% CI: 0.96–1.02; ascorbate) for absolute circulating antioxidants; for circulating antioxidant metabolites, the pooled ORs for digestive system tumors risk per unit increase of antioxidants were 1.29 (95% CI: 0.39–4.28; α-tocopherol), 1.72 (95% CI: 0.85–3.49; γ-tocopherol), 1.05 (95% CI: 0.96–1.14; retinol), and 1.21 (95% CI: 0.97–1.51; ascorbate), respectively. Our study suggested that increased levels of dietary-derived circulating antioxidants did not reduce the risk of digestive system tumors. |
| first_indexed | 2024-03-09T04:00:44Z |
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| language | English |
| last_indexed | 2024-03-09T04:00:44Z |
| publishDate | 2022-08-01 |
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| series | Nutrients |
| spelling | doaj.art-b77bc31c265a443692e328ca0d69fe822023-12-03T14:13:54ZengMDPI AGNutrients2072-66432022-08-011416327410.3390/nu14163274Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization StudyLinlin Yin0Haihao Yan1Kangdi Chen2Zuhong Ji3Xiuhua Zhang4Guozhong Ji5Bin Zhang6Department of Digestive Diseases, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing 210046, ChinaMedical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210029, ChinaMedical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210029, ChinaMedical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210029, ChinaMedical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210029, ChinaMedical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210029, ChinaDepartment of Digestive Diseases, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing 210046, ChinaPrevious observational case-control studies have shown significant controversy over the impact of dietary intake-related circulating antioxidants on the risk of digestive system tumors. We conducted a two-sample Mendelian randomized (MR) analysis to determine whether there was a significant causal relationship between increased levels of circulating antioxidants and digestive system tumors. Our circulating antioxidants (vitamin C, carotenoids, vitamin A, and vitamin E) were derived from absolute circulating antioxidants and circulating antioxidant metabolites, and their corresponding instrumental variables were screened from published studies. The digestive system tumors we studied included colorectal, gastric, pancreatic, liver, and esophageal cancer, and the corresponding summary GAWS (genome-wide association study) data were obtained from the UK Biobank database. We first evaluated the causal relationship between each tumor and circulating antioxidants and then used meta-analysis to summarize the results of MR analysis of different tumors. No significant associations were noted for genetically predicted circulating antioxidants and higher risk of digestive system tumors in our study. The pooled ORs (odds ratio) are 0.72 (95% CI: 0.46–1.11; β-carotene), 0.93 (95% CI: 0.81–1.08; lycopene), 2.12 (95% CI: 0.31–14.66; retinol), and 0.99 (95% CI: 0.96–1.02; ascorbate) for absolute circulating antioxidants; for circulating antioxidant metabolites, the pooled ORs for digestive system tumors risk per unit increase of antioxidants were 1.29 (95% CI: 0.39–4.28; α-tocopherol), 1.72 (95% CI: 0.85–3.49; γ-tocopherol), 1.05 (95% CI: 0.96–1.14; retinol), and 1.21 (95% CI: 0.97–1.51; ascorbate), respectively. Our study suggested that increased levels of dietary-derived circulating antioxidants did not reduce the risk of digestive system tumors.https://www.mdpi.com/2072-6643/14/16/3274digestive system tumorscirculating antioxidantsmendelian randomization |
| spellingShingle | Linlin Yin Haihao Yan Kangdi Chen Zuhong Ji Xiuhua Zhang Guozhong Ji Bin Zhang Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study Nutrients digestive system tumors circulating antioxidants mendelian randomization |
| title | Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study |
| title_full | Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study |
| title_fullStr | Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study |
| title_full_unstemmed | Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study |
| title_short | Diet-Derived Circulating Antioxidants and Risk of Digestive System Tumors: A Mendelian Randomization Study |
| title_sort | diet derived circulating antioxidants and risk of digestive system tumors a mendelian randomization study |
| topic | digestive system tumors circulating antioxidants mendelian randomization |
| url | https://www.mdpi.com/2072-6643/14/16/3274 |
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