This proposal details a 5-year training program to develop the skills necessary to pursue independent research in basic science as part of a career in academic medicine. The principal investigator is a board-certified pediatrician, trained in pediatric cardiology, currently holding a tenure-track faculty appointment at the University of Pittsburgh with a minimum of 75% protected time for research. This training program centers upon studies of cardiac cellular physiology as it relates to fetal and neonatal cardiac glutamate metabolism. Dr. Ian Reynolds will mentor the principal investigator's training. He is a well-established investigator in the field of mitochondrial biology. Dr. Bradley Keller, a highly regarded researcher in cardiac development, will act as co-sponsor. Both have extensive experience in training individuals who have gone on to successful research careers and the combination of their skills and interests will provide comprehensive support of the applicant's research efforts. Dr. Ralphe's research will investigate the role of glutamate transport by the excitatory amino acid transporters (EAATs) in the heart. His preliminary data has demonstrated the presence of EAAT1, EAAT2, and EAAT3 in cardiomyocytes, with EAAT1 localizing to the inner mitochondrial membrane. Understanding the mechanisms of glutamate transport in the heart has important implications in the management of children with cyanotic congenital heart defects and all patients undergoing cardiopulmonary bypass.
Three specific aims will be addressed: 1) the demonstration of localization of EAAT1, EAAT2, EAAT3 and EAAT4 in the cardiomyocyte; 2) the definition of the functional roles played by EAAT1 and EAAT4 within the mitochondria; and 3) the provision of direct evidence that EAAT2 and EAAT3 mediate glutamate uptake into the cardiomyocyte. The University of Pittsburgh and the Children's Hospital of Pittsburgh provide an ideal setting in which to undertake this proposal due to the strong research environment and the availability of outstanding mentors and advisors who will remain closely involved throughout the tenure of this program. This combination will maximize the potential for the principal investigator to develop into a successful independent research scientist.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Clinical Investigator Award (CIA) (K08)
Project #
5K08HL074224-03
Application #
7234093
Study Section
Special Emphasis Panel (ZHL1-CSR-M (F2))
Program Officer
Commarato, Michael
Project Start
2005-06-01
Project End
2007-10-31
Budget Start
2007-06-01
Budget End
2007-10-31
Support Year
3
Fiscal Year
2007
Total Cost
$47,116
Indirect Cost
Name
Children's Hosp Pittsburgh/Upmc Health Sys
Department
Type
DUNS #
044304145
City
Pittsburgh
State
PA
Country
United States
Zip Code
15224