Abstract
Scarce information exists about the link between mixed heavy metals and metabolic syndrome (MetS) and its components, as well as its molecular mechanism. Thus, we identified the associations of serum cadmium, lead, and mercury with MetS and its components using linear regression models, weighted quantile sum (WQS) regression, quantile g-computation (qgcomp), and Bayesian kernel machine regression (BKMR). Of the 5581 subjects included, 30.8% had MetS. In the logistic regression model, serum mercury was associated with MetS and its components, and significant trends were observed for these heavy metal quantiles (p < 0.001). Serum mercury levels were also linked with MetS and its components in the WQS and qgcomp models. In BKMR analysis, the overall effect of the mixture was significantly associated with MetS and its components. Serum mercury showed positive trends and was observed as the most important factor associated with MetS, along with elevated waist circumference and elevated blood pressure. In in-silico toxicogenomic data mining, we found several pathways (insulin resistance, IL6 signaling pathway, and adipogenesis), regulation of lipid localization, and metabolic syndrome X as key molecular mechanisms that may be affected by heavy metals and involved in the development of MetS. We identified hsa-miR-124-3p as the highest interaction and expression implicated in the MetS process. We also used miRNAsong to create and test a miRNA sponge sequence for these miRNAs, which may be promising for being used in MetS therapy. In particular, the cutoff levels for exposure levels related to MetS and its components were also reported.
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Data Availability
Data from KNHANES is available online at https://knhanes.kdca.go.kr/knhanes/main.do.
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Acknowledgements
The authors are grateful to all research staff for their excellent contributions in data collection in the survey.
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This study supported by National Research Foundation of Korea (NRF) (Grant No. 2022R1A2C1005643).
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HDN: Conceptualization, methodology, formal analysis, investigation, resources, data curation, writing—original draft, writing—review & editing, visualization. MSK: visualization.
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Nguyen, H.D., Oh, H. & Kim, MS. Effect of Mixture of Heavy Metals on Metabolic Syndrome and Its Components in Individuals ≥ 18 Years of Age: From Big Data to Molecular Mechanisms Involved. Expo Health 15, 773–805 (2023). https://doi.org/10.1007/s12403-022-00523-y
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DOI: https://doi.org/10.1007/s12403-022-00523-y