School of Medicine Publications and Presentations
Document Type
Article
Publication Date
6-2022
Abstract
Introduction: Cardiovascular disease (CVD) is the leading cause of mortality worldwide and is the leading cause of death in the US. Lipid dysregulation is a well-known precursor to metabolic diseases, including CVD. There is a growing body of literature that suggests MRI-derived epicardial fat volume, or epicardial adipose tissue (EAT) volume, is linked to the development of coronary artery disease. Interestingly, epicardial fat is also actively involved in lipid and energy homeostasis, with epicardial adipose tissue having a greater capacity for release and uptake of free fatty acids. However, there is a scarcity of knowledge on the influence of plasma lipids on EAT volume.
Aim: The focus of this study is on the identification of novel lipidomic species associated with CMRI-derived measures of epicardial fat in Mexican American individuals.
Methods: We performed lipidomic profiling on 200 Mexican American individuals. High-throughput mass spectrometry enabled rapid capture of precise lipidomic profiles, providing measures of 799 unique species from circulating plasma samples. Because of our extended pedigree design, we utilized a standard quantitative genetic linear mixed model analysis to determine whether lipids were correlated with EAT by formally testing for association between each lipid species and the CMRI epicardial fat phenotype.
Results: After correction for multiple testing using the FDR approach, we identified 135 lipid species showing significant association with epicardial fat. Of those, 131 lipid species were positively correlated with EAT, where increased circulating lipid levels were correlated with increased epicardial fat. Interestingly, the top 10 lipid species associated with an increased epicardial fat volume were from the deoxyceramide (Cer(m)) and triacylglycerol (TG) families. Deoxyceramides are atypical and neurotoxic sphingolipids. Triacylglycerols are an abundant lipid class and comprise the bulk of storage fat in tissues. Pathologically elevated TG and Cer(m) levels are related to CVD risk and, in our study, to EAT volume.
Conclusion: Our results indicate that specific lipid abnormalities such as enriched saturated triacylglycerols and the presence of toxic ceramides Cer(m) in plasma of our individuals could precede CVD with increased EAT volume.
Recommended Citation
Leandro, A. C., Michael, L. F., Almeida, M., Kuokkanen, M., Huynh, K., Giles, C., Duong, T., Diego, V. P., Duggirala, R., Clarke, G. D., Blangero, J., Meikle, P. J., & Curran, J. E. (2022). Influence of the Human Lipidome on Epicardial Fat Volume in Mexican American Individuals. Frontiers in cardiovascular medicine, 9, 889985. https://doi.org/10.3389/fcvm.2022.889985
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Publication Title
Frontiers in Cardiovascular Medicine
DOI
10.3389/fcvm.2022.889985
Academic Level
faculty
Mentor/PI Department
Office of Human Genetics
Comments
Copyright © 2022 Leandro, Michael, Almeida, Kuokkanen, Huynh, Giles, Duong, Diego, Duggirala, Clarke, Blangero, Meikle and Curran.