The overarching goal of this competing renewal application (P01-DK58398-11) continues to be the development of technologies that lead to new methods for studying, detecting, and treating type 2 diabetes, and their integration with hypothesis-driven diabetes research projects. The program involves collaboration of two major metabolic research centers at Duke University Medical Center and the University of Texas Southwestern Medical Center, Dallas. In the past funding cycle, our team's most compelling advances in technology development have centered on comprehensive tools for metabolic analysis, including NMR-based methods for measurement of metabolic flux and mass spectrometry-based methods for static profiling of intermediary metabolites. A key goal of the program in moving forward is to apply these tools in an integrated fashion to a diverse array of animal models and human subjects to gain a more comprehensive view of metabolic perturbations associated with development of type 2 diabetes than has heretofore been possible. The four projects and three cores of the program are organized around three core hypotheses: 1) Major complications of over-nutrition such as insulin resistance and glucose intolerance are the result of overload of normally functioning mitochondrial pathways rather than intrinsic deficiencies in mitochondrial metabolism; 2) In addition to lipids, branched-chain amino acids and related metabolites play an important role in causation of mitochondrial dysfunction and loss of insulin sensitivity; 3) Mitochondrial flexibility in oxidative and anaplerotic pathways is impaired in insuin resistant liver via constitutive activation of mTORCI and substrate overload. A distinguishing feature of the application is the translation of new understanding and hypotheses developed in cell and animal models in Projects 1, 2, and 3 to human subjects via the studies proposed in Project 4. Through this work, we hope to derive the most complete understanding to date of changes in metabolism within major organs and tissues during development of insulin resistance, type 2 diabetes, and related disorders, leading to novel therapeutic targets and new diagnostic tests for metabolic diseases that cripple modern society.

Public Health Relevance

This program seeks to integrate novel technologies for metabolic flux analysis and static metabolic profiling to gain a unique understanding of changes in peripheral metabolism during development of insulin resistance and type 2 diabetes. These new insights could lead to new diagnostic tests and novel therapies for this crippling disease.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Program Projects (P01)
Project #
5P01DK058398-14
Application #
8850424
Study Section
Special Emphasis Panel (ZDK1-GRB-N (J2))
Program Officer
Castle, Arthur
Project Start
2000-09-01
Project End
2017-04-30
Budget Start
2015-05-01
Budget End
2016-04-30
Support Year
14
Fiscal Year
2015
Total Cost
$1,966,913
Indirect Cost
$359,543
Name
Duke University
Department
Pharmacology
Type
Schools of Medicine
DUNS #
044387793
City
Durham
State
NC
Country
United States
Zip Code
27705
McGarrah, Robert W; Crown, Scott B; Zhang, Guo-Fang et al. (2018) Cardiovascular Metabolomics. Circ Res 122:1238-1258
Fisher-Wellman, Kelsey H; Davidson, Michael T; Narowski, Tara M et al. (2018) Mitochondrial Diagnostics: A Multiplexed Assay Platform for Comprehensive Assessment of Mitochondrial Energy Fluxes. Cell Rep 24:3593-3606.e10
Jin, Eunsook S; Lee, Min Hee; Murphy, Rebecca E et al. (2018) Pentose phosphate pathway activity parallels lipogenesis but not antioxidant processes in rat liver. Am J Physiol Endocrinol Metab 314:E543-E551
Ren, Jimin; Shang, Ty; Sherry, A Dean et al. (2018) Unveiling a hidden 31 P signal coresonating with extracellular inorganic phosphate by outer-volume-suppression and localized 31 P MRS in the human brain at 7T. Magn Reson Med 80:1289-1297
An, Jie; Wang, Liping; Patnode, Michael L et al. (2018) Physiological mechanisms of sustained fumagillin-induced weight loss. JCI Insight 3:
Peterson, Brett S; Campbell, Jonathan E; Ilkayeva, Olga et al. (2018) Remodeling of the Acetylproteome by SIRT3 Manipulation Fails to Affect Insulin Secretion or ? Cell Metabolism in the Absence of Overnutrition. Cell Rep 24:209-223.e6
White, Phillip J; McGarrah, Robert W; Grimsrud, Paul A et al. (2018) The BCKDH Kinase and Phosphatase Integrate BCAA and Lipid Metabolism via Regulation of ATP-Citrate Lyase. Cell Metab 27:1281-1293.e7
Jin, Eunsook S; Browning, Jeffrey D; Murphy, Rebecca E et al. (2018) Fatty liver disrupts glycerol metabolism in gluconeogenic and lipogenic pathways in humans. J Lipid Res 59:1685-1694
Shantavasinkul, Prapimporn Chattranukulchai; Muehlbauer, Michael J; Bain, James R et al. (2018) Improvement in insulin resistance after gastric bypass surgery is correlated with a decline in plasma 2-hydroxybutyric acid. Surg Obes Relat Dis 14:1126-1132
Newgard, Christopher B (2017) Metabolomics and Metabolic Diseases: Where Do We Stand? Cell Metab 25:43-56

Showing the most recent 10 out of 181 publications