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Relation of plasma ceramides to visceral adiposity, insulin resistance and the development of type 2 diabetes mellitus: the Dallas Heart Study – published online 29/08/2018

Fig from Neeland paper

Ian J. Neeland, Shruti Singh, Darren K. McGuire, Gloria L. Vega, Thomas Roddy, Dermot F. Reilly, Jose Castro-Perez, Julia Kozlitina, Philipp E. Scherer

Ceramides are sphingolipids involved in the regulation of signal transduction pathways. Although they have been found to contribute to insulin resistance in preclinical models, epidemiological data evaluating the relationship between plasma ceramides, indicators of dysfunctional adiposity and type 2 diabetes are lacking. In this issue, using data from the Dallas Heart Study, Neeland et al ( report that shorter-chain fatty acid ceramides were associated with an unfavourable adiposity, lipid and insulin resistance profile. In contrast, longer-chain unsaturated fatty acid ceramides were inversely associate with this phenotype. The authors show that plasma ceramides were not independently associated with impaired fasting glucose or incident type 2 diabetes after adjustment for clinical factors. These findings suggest a role for ceramides in a shared pathway of metabolic dysfunction that links dysfunctional adiposity with insulin resistance. They also provide a nuanced perspective on the relationship between ceramides and metabolic phenotypes. Further investigation is needed to evaluate the potential role of plasma-based ceramide screening in metabolic risk stratification.

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