This Program Project Grant application describes studies we plan to perform as a continuation of our previous projects concerned with the regulation of cardiovascular function, primarily by endothelium-derived mediators, nitric oxide and reactive oxygen species. The present application builds on our previously obtained data to further establish the role of these agents in the control of vascular and cardiac function. Our overall hypothesis that we aim to test is that oxygen radical species, derived through activation of Nox oxidases in the vessel wall, by causing a reduction in nitric oxide bioavailability, hasten the development of vascular dysfunction leading to disease. In the first Project, Dr. Wolin will characterize how Nox-linked signaling mechanisms affect vascular function and how these mechanisms are altered in pathophysiologic conditions. In the second Project, Dr. Hintze will examine in mice, rats and dogs the role of NADPH oxidase in the increased oxidant production secondary to sodium restriction, a state associated with increased angiotensin production. He will also determine in the dog heart the effects of sodium restriction on NO dependent regulation of the coronary circulation as well as the fate of substrates and the alteration in the expression of metabolic enzymes. In the third Project, Dr. Kaley plans to study the effects of aging on vascular function in type 2 diabetic (db/db) and eNOS-KO mice, two different models of metabolic syndrome, each of which is characterized by increased oxidant stress and a reduction in nitric oxide bioavailability. The projects will be supported by three cores;one led by Dr. Edwards, providing genotyping of and physiologic measurements in mice, one led by Dr. Ungvari who will provide expertise in imaging ROS in vessels and tissues by state of the art methods and one led by Dr.
Oj aimi, who will interpret data obtained by gene array techniques. We believe that our research will provide conceptual advances that will likely lead to a better understanding of the development of vascular dysfunction in disease states as well as to novel therapeutic options.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Program Projects (P01)
Project #
5P01HL043023-20
Application #
8051656
Study Section
Heart, Lung, and Blood Initial Review Group (HLBP)
Program Officer
Gao, Yunling
Project Start
1997-07-01
Project End
2013-03-31
Budget Start
2011-04-01
Budget End
2013-03-31
Support Year
20
Fiscal Year
2011
Total Cost
$1,811,716
Indirect Cost
Name
New York Medical College
Department
Physiology
Type
Schools of Medicine
DUNS #
041907486
City
Valhalla
State
NY
Country
United States
Zip Code
10595
Szekeres, Mária; Nádasy, György L; Dörnyei, Gabriella et al. (2018) Remodeling of Wall Mechanics and the Myogenic Mechanism of Rat Intramural Coronary Arterioles in Response to a Short-Term Daily Exercise Program: Role of Endothelial Factors. J Vasc Res 55:87-97
Alhawaj, Raed; Patel, Dhara; Kelly, Melissa R et al. (2015) Heme biosynthesis modulation via ?-aminolevulinic acid administration attenuates chronic hypoxia-induced pulmonary hypertension. Am J Physiol Lung Cell Mol Physiol 308:L719-28
Song, Su; Kertowidjojo, Elizabeth; Ojaimi, Caroline et al. (2015) Long-term methionine-diet induced mild hyperhomocysteinemia associated cardiac metabolic dysfunction in multiparous rats. Physiol Rep 3:
Huang, An; Pinto, John T; Froogh, Ghezal et al. (2015) Role of homocysteinylation of ACE in endothelial dysfunction of arteries. Am J Physiol Heart Circ Physiol 308:H92-100
Patel, Dhara; Alhawaj, Raed; Wolin, Michael S (2014) Exposure of mice to chronic hypoxia attenuates pulmonary arterial contractile responses to acute hypoxia by increases in extracellular hydrogen peroxide. Am J Physiol Regul Integr Comp Physiol 307:R426-33
Patel, Dhara; Kandhi, Sharath; Kelly, Melissa et al. (2014) Dehydroepiandrosterone promotes pulmonary artery relaxation by NADPH oxidation-elicited subunit dimerization of protein kinase G 1?. Am J Physiol Lung Cell Mol Physiol 306:L383-91
Laurent, D; Mathew, J E; Mitry, M et al. (2014) Chronic ethanol consumption increases myocardial mitochondrial DNA mutations: a potential contribution by mitochondrial topoisomerases. Alcohol Alcohol 49:381-9
Signore, Sergio; Sorrentino, Andrea; Ferreira-Martins, João et al. (2014) Response to letter regarding article ""Inositol 1,4,5-trisphosphate receptors and human left ventricular myocytes"". Circulation 129:e510-1
Koller, Akos; Balasko, Marta; Bagi, Zsolt (2013) Endothelial regulation of coronary microcirculation in health and cardiometabolic diseases. Intern Emerg Med 8 Suppl 1:S51-4
Neo, Boon Hwa; Patel, Dhara; Kandhi, Sharath et al. (2013) Roles for cytosolic NADPH redox in regulating pulmonary artery relaxation by thiol oxidation-elicited subunit dimerization of protein kinase G1?. Am J Physiol Heart Circ Physiol 305:H330-43

Showing the most recent 10 out of 395 publications