--- _id: '32323' abstract: - lang: eng text: Genetic correlations suggest a coexisting genetic predisposition to both low leptin levels and risk for anorexia nervosa (AN). To investigate the causality and direction of these associations, we performed bidirectional two-sample Mendelian randomization (MR) analyses using data of the most recent genome-wide association study (GWAS) for AN and both a GWAS and an exome-wide-association-study (EWAS) for leptin levels. Most MR methods with genetic instruments from GWAS showed a causal effect of lower leptin levels on higher risk of AN (e.g. IVW b = −0.923, p = 1.5 × 10−4). Because most patients with AN are female, we additionally performed analyses using leptin GWAS data of females only. Again, there was a significant effect of leptin levels on the risk of AN (e.g. IVW b = −0.826, p = 1.1 × 10−04). MR with genetic instruments from EWAS showed no overall effect of leptin levels on the risk for AN. For the opposite direction, MR revealed no causal effect of AN on leptin levels. If our results are confirmed in extended GWAS data sets, a low endogenous leptin synthesis represents a risk factor for developing AN. author: - first_name: Triinu full_name: Peters, Triinu last_name: Peters - first_name: Jochen full_name: Antel, Jochen last_name: Antel - first_name: Roaa full_name: Naaresh, Roaa last_name: Naaresh - first_name: Björn-Hergen full_name: Laabs, Björn-Hergen last_name: Laabs - first_name: Manuel full_name: Föcker, Manuel last_name: Föcker - first_name: Nicola full_name: Albers, Nicola last_name: Albers - first_name: Judith full_name: Bühlmeier, Judith last_name: Bühlmeier - first_name: Anke full_name: Hinney, Anke last_name: Hinney - first_name: Lars full_name: Libuda, Lars last_name: Libuda - first_name: Johannes full_name: Hebebrand, Johannes last_name: Hebebrand citation: ama: 'Peters T, Antel J, Naaresh R, et al. Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study. Frontiers in Genetics. 2021;12. doi:10.3389/fgene.2021.733606' apa: 'Peters, T., Antel, J., Naaresh, R., Laabs, B.-H., Föcker, M., Albers, N., Bühlmeier, J., Hinney, A., Libuda, L., & Hebebrand, J. (2021). Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study. Frontiers in Genetics, 12. https://doi.org/10.3389/fgene.2021.733606' bibtex: '@article{Peters_Antel_Naaresh_Laabs_Föcker_Albers_Bühlmeier_Hinney_Libuda_Hebebrand_2021, title={Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study}, volume={12}, DOI={10.3389/fgene.2021.733606}, journal={Frontiers in Genetics}, publisher={Frontiers Media SA}, author={Peters, Triinu and Antel, Jochen and Naaresh, Roaa and Laabs, Björn-Hergen and Föcker, Manuel and Albers, Nicola and Bühlmeier, Judith and Hinney, Anke and Libuda, Lars and Hebebrand, Johannes}, year={2021} }' chicago: 'Peters, Triinu, Jochen Antel, Roaa Naaresh, Björn-Hergen Laabs, Manuel Föcker, Nicola Albers, Judith Bühlmeier, Anke Hinney, Lars Libuda, and Johannes Hebebrand. “Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study.” Frontiers in Genetics 12 (2021). https://doi.org/10.3389/fgene.2021.733606.' ieee: 'T. Peters et al., “Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study,” Frontiers in Genetics, vol. 12, 2021, doi: 10.3389/fgene.2021.733606.' mla: 'Peters, Triinu, et al. “Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study.” Frontiers in Genetics, vol. 12, Frontiers Media SA, 2021, doi:10.3389/fgene.2021.733606.' short: T. Peters, J. Antel, R. Naaresh, B.-H. Laabs, M. Föcker, N. Albers, J. Bühlmeier, A. Hinney, L. Libuda, J. Hebebrand, Frontiers in Genetics 12 (2021). date_created: 2022-07-06T15:10:40Z date_updated: 2022-08-30T13:11:49Z department: - _id: '35' doi: 10.3389/fgene.2021.733606 intvolume: ' 12' keyword: - Genetics (clinical) - Genetics - Molecular Medicine language: - iso: eng publication: Frontiers in Genetics publication_identifier: issn: - 1664-8021 publication_status: published publisher: Frontiers Media SA status: public title: 'Suggestive Evidence for Causal Effect of Leptin Levels on Risk for Anorexia Nervosa: Results of a Mendelian Randomization Study' type: journal_article user_id: '88682' volume: 12 year: '2021' ...