Einstein-Sinai Diabetes Research Center

Stable Isotope & Metabolomics Core

Leadership

Dr. Irwin Kurland diabetes research Albert Einstein College of Medicine Montefiore Medical Center Bronx NY

Director: Irwin Kurland, MD 

 
Dr. Xue-Liang Du diabetes research Albert Einstein College of Medicine Montefiore Medical Center Bronx NY

Seahorse Technician: Xue-Liang Du, PhD 

 

Location:  Price 368

Seahorse Location: Forchheimer 529

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The newly established Einstein-Sinai Diabetes Research Center Stable Isotope & Metabolomics Core uses stable isotope flux and metabolite profiling to help formulate and test hypotheses about the metabolic consequences of various changes in gene expression and protein function, in order to guide further integrative systems biology analyses of the underlying mechanisms in diabetes, insulin resistance, obesity, and diabetic complications.

The Stable Isotope & Metabolomics Core’s evaluation framework complements the analyses performed in the Animal Physiology Core, such as measurements of whole body carbohydrate/fatty acid oxidation, energy expenditure, tissue-specific insulin sensitivity, glucose, protein and fatty acid metabolism.

New Developments

Bile acids are synthesized from cholesterol through both classical and alternative pathways. In the alternative pathway, the side chain oxidation of cholesterol precedes the steroid ring modifications, first yielding 24-, 25-, and 27-hydroxycholesterol metabolites, opposite to the process in the classical pathway. The alternative and classical pathway bile acids share the primary bile acid chenodeoxycholic acid, with 12-a-hydroxylation of chenodeoxycholic acid via CYP8B1to cholic acid. Modifications of bile acids can affect their properties and their ability to activate bile acid receptors. Dysregulation of bile acid synthesis can be seen in inborn errors of metabolism, insulin resistance, hepatocellular Ca and chronic ethanol consumption. Perturbations in the microbiome also affect bile acid pool size and composition.

The Stable Isotope & Metabolomics Core has established a new module for the determination of 22 bile acids that are now available for investigators. 

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