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Abstract
Objective
This study estimated the effect of BMI on circulating metabolites in young adults using a recall-by-genotype study design.
Methods
A recall-by-genotype study was implemented in the Avon Longitudinal Study of Parents and Children. Samples from 756 participants were selected for untargeted metabolomics analysis based on low versus high genetic liability for higher BMI defined by a genetic risk score (GRS). Regression analyses were performed to investigate associations between BMI GRS group and relative abundance of 973 metabolites.
Results
After correction for multiple testing, 29 metabolites were associated with BMI GRS group. Bilirubin was among the most strongly associated metabolites, with reduced levels measured in individuals in the high-BMI GRS group (β = −0.32, 95% CI: −0.46 to −0.18, Benjamini-Hochberg adjusted p = 0.005). This study observed associations between BMI GRS group and the levels of several potentially diet-related metabolites, including hippurate, which had lower mean abundance in individuals in the high-BMI GRS group (β = −0.29, 95% CI: −0.44 to −0.15, Benjamini-Hochberg adjusted p = 0.008).
Conclusions
Together with existing literature, these results suggest that a genetic predisposition to higher BMI captures differences in metabolism leading to adiposity gain. In the absence of prospective data, separating these effects from the downstream consequences of weight gain is challenging.
This study estimated the effect of BMI on circulating metabolites in young adults using a recall-by-genotype study design.
Methods
A recall-by-genotype study was implemented in the Avon Longitudinal Study of Parents and Children. Samples from 756 participants were selected for untargeted metabolomics analysis based on low versus high genetic liability for higher BMI defined by a genetic risk score (GRS). Regression analyses were performed to investigate associations between BMI GRS group and relative abundance of 973 metabolites.
Results
After correction for multiple testing, 29 metabolites were associated with BMI GRS group. Bilirubin was among the most strongly associated metabolites, with reduced levels measured in individuals in the high-BMI GRS group (β = −0.32, 95% CI: −0.46 to −0.18, Benjamini-Hochberg adjusted p = 0.005). This study observed associations between BMI GRS group and the levels of several potentially diet-related metabolites, including hippurate, which had lower mean abundance in individuals in the high-BMI GRS group (β = −0.29, 95% CI: −0.44 to −0.15, Benjamini-Hochberg adjusted p = 0.008).
Conclusions
Together with existing literature, these results suggest that a genetic predisposition to higher BMI captures differences in metabolism leading to adiposity gain. In the absence of prospective data, separating these effects from the downstream consequences of weight gain is challenging.
Original language | English |
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Pages (from-to) | 1298-1310 |
Number of pages | 13 |
Journal | Obesity |
Volume | 30 |
Issue number | 6 |
Early online date | 22 May 2022 |
DOIs | |
Publication status | Published - 8 Jun 2022 |
Bibliographical note
Funding Information:NJT is a Wellcome Trust Investigator (202802/Z/16/Z), is the primary investigator (PI) of the Avon Longitudinal Study of Parents and Children (ALSPAC; MRC & WT 217065/Z/19/Z), is supported by the University of Bristol National Institute for Health Research Biomedical Research Centre and the Medical Research Council Integrative Epidemiology Unit (MC_UU_00011/1), and works within the Cancer Research UK (CRUK) Integrative Cancer Epidemiology Programme (C18281/A29019). At the start of this project, KHW was supported by a Wellcome Trust Investigator grant (PI: NJT; 202802/Z/16/Z) and then the Elizabeth Blackwell Institute for Health Research, University of Bristol and the Wellcome Trust Institutional Strategic Support Fund (204813/Z/16/Z). DAH and LJC are supported by a Wellcome Trust Investigator grant (PI: NJT; 202802/Z/16/Z) and work within the Medical Research Council Integrative Epidemiology Unit (MC_UU_12013/3). S. Fang is supported by a Wellcome Trust PhD studentship (108902/Z/15/Z). The UK Medical Research Council and Wellcome (grant ref: 217065/Z/19/Z) and the University of Bristol provide core support for ALSPAC. A comprehensive list of grants funding is available on the ALSPAC website ( https://www.bristol.ac.uk/alspac/external/documents/grant‐acknowledgements.pdf ). This research was funded in whole, or in part, by the Wellcome Trust (202802/Z/16/Z). For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) public copyright license to any author accepted manuscript version arising from this submission.
Publisher Copyright:
© 2022 The Authors. Obesity published by Wiley Periodicals LLC on behalf of The Obesity Society (TOS).
Research Groups and Themes
- ALSPAC
Keywords
- Body Mass Index
- Genetic scores
- Recall by Genotype
- metabolomics
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8074 (C18281/A29019) ICEP2 - Programme Award: Towards improved casual evidence and enhanced prediction of cancer risk and survival
Martin, R. M. (Principal Investigator)
1/10/20 → 30/09/25
Project: Research