The most important consequences of lung disease is hypoxemia resulting in paired oxygen supply to the tissues. This research program continues its commitment to understanding the causes and effects of hypoxemia in health and disease. Two of the six projects address this at the level of the lung; the other four focus on the skeletal muscles. All follow the theme of understanding how the structural elements of the O2 transport chain determine and regulate O2 transport. Al projects are led by faculty in the Physiology Division of the Department Of Medicine, with four of the projects continuing from the prior cycle. The program, requesting support for years 26-30, has evolved considerably over the last five years to heavily depend on cellular and molecular techniques applied in physiological circumstances to answer questions of biological and clinical importance. A molecular laboratory and cell culture facility are in place to support this direction. Dr. Wagner addresses the determinants of maximal exercise in health and disease, with a focus on molecular regulation of angiogenesis in muscle. Dr. Mathieu-Costello uses a comparative morphological approach to study muscle capacity for blood-tissue O2 transfer during the aging process. Dr. Richardson deals with effects of age on muscle function, and will develop new magnetic resonance-based methods to study this. Dr. Powell continues to address hypoxic ventilatory responses, using systemic physiological and molecular methods in an integrated program. Dr. Hogan will focus on how O2 regulates muscle function in single fibers. Dr. Breen studies effects of physical stress on lung matrix protein regulation, and also addresses the significance of stress-induced calcyclin gene expression to lung fibroblast cell division. The program is supported by three cores: Morphology/Morphometry and Administrative (continuing from the prior cycle) and a new Molecular Biology core. Our collective goal is to understand how O2 transport between the environment and the mitochondria is regulated in health and disease by applying systemic, cellular and molecular methods to key question in an integrated manner and in physiologically intact systems.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Program Projects (P01)
Project #
2P01HL017731-26
Application #
6027979
Study Section
Heart, Lung, and Blood Initial Review Group (HLBP)
Project Start
1975-03-01
Project End
2005-04-30
Budget Start
2000-05-01
Budget End
2001-04-30
Support Year
26
Fiscal Year
2000
Total Cost
$1,969,982
Indirect Cost
Name
University of California San Diego
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
077758407
City
La Jolla
State
CA
Country
United States
Zip Code
92093
Richardson, Russell S; Wary, Claire; Wray, D Walter et al. (2015) MRS Evidence of Adequate O? Supply in Human Skeletal Muscle at the Onset of Exercise. Med Sci Sports Exerc 47:2299-307
Esposito, F; Wagner, P D; Richardson, R S (2015) Incremental large and small muscle mass exercise in patients with heart failure: evidence of preserved peripheral haemodynamics and metabolism. Acta Physiol (Oxf) 213:688-99
Olfert, I Mark; Malek, Moh H; Eagan, Tomas M L et al. (2014) Inflammatory cytokine response to exercise in alpha-1-antitrypsin deficient COPD patients 'on' or 'off' augmentation therapy. BMC Pulm Med 14:106
Poole, David C; Copp, Steven W; Ferguson, Scott K et al. (2013) Skeletal muscle capillary function: contemporary observations and novel hypotheses. Exp Physiol 98:1645-58
Koga, S; Wüst, R C I; Walsh, B et al. (2013) Increasing temperature speeds intracellular PO2 kinetics during contractions in single Xenopus skeletal muscle fibers. Am J Physiol Regul Integr Comp Physiol 304:R59-66
Breen, Ellen C; Malloy, Jaret L; Tang, Kechun et al. (2013) Impaired pulmonary defense against Pseudomonas aeruginosa in VEGF gene inactivated mouse lung. J Cell Physiol 228:371-9
Tang, Kechun; Murano, George; Wagner, Harrieth et al. (2013) Impaired exercise capacity and skeletal muscle function in a mouse model of pulmonary inflammation. J Appl Physiol 114:1340-50
Wray, D Walter; Nishiyama, Steven K; Donato, Anthony J et al. (2011) The paradox of oxidative stress and exercise with advancing age. Exerc Sport Sci Rev 39:68-76
Esposito, Fabio; Mathieu-Costello, Odile; Entin, Pauline L et al. (2010) The skeletal muscle VEGF mRNA response to acute exercise in patients with chronic heart failure. Growth Factors 28:139-47
Wray, D Walter; Nishiyama, Steve K; Donato, Anthony J et al. (2010) Human vascular aging: limb-specific lessons. Exerc Sport Sci Rev 38:177-85

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