Dr. Deeney’s research is designed to discern the nutrient-derived metabolic signals leading to glucose- and fatty acid (FA)-induced insulin exocytosis from the pancreatic ß-cell. FA acutely stimulates glucose-induced insulin secretion (GSIS) while chronic exposure to elevated FA and glucose can result in glucolipotoxicity (GLT) with basal hypersecretion and inhibition of GSIS. Despite the adverse effects of chronic exposure, FA is known to be required for normal exocytosis from the ß-cell. Deciphering the dual effects of FA on GSIS will lead to the possible development of therapies that would reduce the inhibitory effects while sparing the stimulatory effects of FA on the ß-cell. Studies in his laboratory are aimed at identifying the lipids or lipid classes involved in enhancing and suppressing GSIS and assessing their effects on lipid-modulated or modulating proteins.
- Karolinska Institutet, PhD
- Virginia Polytechnic Institute and State University, MS
- Saint Joseph College, BS
- Published on 12/23/2019
Thomas DD, Stockman MC, Yu L, Meshulam T, McCarthy AC, Ionson A, Burritt N, Deeney J, Cabral H, Corkey B, Istfan N, Apovian CM. Effects of medium chain triglycerides supplementation on insulin sensitivity and beta cell function: A feasibility study. PLoS One. 2019; 14(12):e0226200. PMID: 31869355.
- Published on 10/30/2018
Petcherski A, Trudeau KM, Wolf DM, Segawa M, Lee J, Taddeo EP, Deeney JT, Liesa M. Elamipretide Promotes Mitophagosome Formation and Prevents Its Reduction Induced by Nutrient Excess in INS1 ß-cells. J Mol Biol. 2018 12 07; 430(24):4823-4833. PMID: 30389435.
- Published on 3/1/2018
Andrieu GP, Shafran JS, Deeney JT, Bharadwaj KR, Rangarajan A, Denis GV. BET proteins in abnormal metabolism, inflammation, and the breast cancer microenvironment. J Leukoc Biol. 2018 08; 104(2):265-274. PMID: 29493812.
- Published on 12/4/2017
Jones Iv AR, Coleman EL, Husni NR, Deeney JT, Raval F, Steenkamp D, Dooms H, Nikolajczyk BS, Corkey BE. Type 1 diabetes alters lipid handling and metabolism in human fibroblasts and peripheral blood mononuclear cells. PLoS One. 2017; 12(12):e0188474. PMID: 29206239.
- Published on 11/16/2016
Pizarro-Delgado J, Deeney JT, Corkey BE, Tamarit-Rodriguez J. Direct Stimulation of Islet Insulin Secretion by Glycolytic and Mitochondrial Metabolites in KCl-Depolarized Islets. PLoS One. 2016; 11(11):e0166111. PMID: 27851770.
- Published on 3/23/2016
Deeney JT, Belkina AC, Shirihai OS, Corkey BE, Denis GV. BET Bromodomain Proteins Brd2, Brd3 and Brd4 Selectively Regulate Metabolic Pathways in the Pancreatic ß-Cell. PLoS One. 2016; 11(3):e0151329. PMID: 27008626.
- Published on 2/11/2016
Berdan CA, Erion KA, Burritt NE, Corkey BE, Deeney JT. Inhibition of Monoacylglycerol Lipase Activity Decreases Glucose-Stimulated Insulin Secretion in INS-1 (832/13) Cells and Rat Islets. PLoS One. 2016; 11(2):e0149008. PMID: 26867016.
- Published on 2/1/2016
Rameh LE, Deeney JT. Phosphoinositide signalling in type 2 diabetes: a ß-cell perspective. Biochem Soc Trans. 2016 Feb; 44(1):293-8. PMID: 26862218.
- Published on 1/28/2016
Xie Z, Jones A, Deeney JT, Hur SK, Bankaitis VA. Inborn Errors of Long-Chain Fatty Acid ß-Oxidation Link Neural Stem Cell Self-Renewal to Autism. Cell Rep. 2016 Feb 9; 14(5):991-9. PMID: 26832401.
- Published on 10/7/2015
Pizarro-Delgado J, Deeney JT, Martín-del-Río R, Corkey BE, Tamarit-Rodriguez J. KCl -Permeabilized Pancreatic Islets: An Experimental Model to Explore the Messenger Role of ATP in the Mechanism of Insulin Secretion. PLoS One. 2015; 10(10):e0140096. PMID: 26444014.
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