We will continue our investigaton on three areas originally described in our grant applicaion most of which have been followed over the past ten years: I. The relationship between calcium ATPase and calcium transport and the control of these will be pursued. In addition to kinetic studies, examination of the effects of altering lipids and the lipid environment of the purified calcium ATPase from cardiac and skeletal muscle will be examined. Finally, hydrogen ion concentration has been found to be a very sensitive probe to examine the relationships between calcium transport and calcium ATPase and many factors which result in pH sensitivity of calcium transport have been particularly revealing. This will be examined under circumstances of varying substrate concentrations. II. Sarcoplamic Reticulum-Glycogenolytic Complex - Current investigation involves comparison of beta-adrenergic receptors in this complex as compared to sarcolemmal beta-adrenergic receptor to try to clarify whether or not a distinct beta-adrenergic receptor is found in sarcoplasmic reticulum fragments. Purification of sarcoplasmic reticulum preparations has proceeded to the point where no measurable sodium-potassium ATPase or ouabain binding can be discerned. In addition, investgation of the mechanism of coupling of both the activating phosphatase enzymes to phosphorylase in skeletal muscle SR glycogenolytic complexes is being pursued. III. Microtubules -Further investigation in both morphologic and biochemical and cardiac microtubules is proceeding. Currently we are optimizing conditons for the formation of microtubules in vitro and examining other morphologically distinct forms also produced under varing conditions by the same general protein mixture.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL013870-16
Application #
3334698
Study Section
Pharmacology A Study Section (PHRA)
Project Start
1977-09-01
Project End
1987-08-31
Budget Start
1985-09-01
Budget End
1986-08-31
Support Year
16
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Baylor College of Medicine
Department
Type
Schools of Medicine
DUNS #
074615394
City
Houston
State
TX
Country
United States
Zip Code
77030
Hartley, Craig J; Reddy, Anilkumar K; Madala, Sridhar et al. (2011) Doppler velocity measurements from large and small arteries of mice. Am J Physiol Heart Circ Physiol 301:H269-78
Lloyd, Eric E; Gaubatz, John W; Burns, Alan R et al. (2007) Sustained elevations in NEFA induce cyclooxygenase-2 activity and potentiate THP-1 macrophage foam cell formation. Atherosclerosis 192:49-55
Hartley, Craig J; Taffet, George E; Reddy, Anilkumar K et al. (2002) Noninvasive cardiovascular phenotyping in mice. ILAR J 43:147-58
Bick, R J; Van Winkle, W B; Taffet, G E (1998) Cardiac sarcoplasmic reticulum membrane lipid asymmetries. Ann N Y Acad Sci 853:365-7
Bick, R J; Buja, L M; Van Winkle, W B et al. (1998) Membrane asymmetry in isolated canine cardiac sarcoplasmic reticulum: comparison with skeletal muscle sarcoplasmic reticulum. J Membr Biol 164:169-75
Taffet, G E; Hartley, C J; Wen, X et al. (1996) Noninvasive indexes of cardiac systolic and diastolic function in hyperthyroid and senescent mouse. Am J Physiol 270:H2204-9
Taffet, G E; Pham, T T; Bick, D L et al. (1993) The calcium uptake of the rat heart sarcoplasmic reticulum is altered by dietary lipid. J Membr Biol 131:35-42
Taffet, G E; Tate, C A (1993) CaATPase content is lower in cardiac sarcoplasmic reticulum isolated from old rats. Am J Physiol 264:H1609-14
Tate, C; Hamra, M; Shin, G et al. (1993) Canine cardiac sarcoplasmic reticulum is not altered with endurance exercise training. Med Sci Sports Exerc 25:1246-57
Chu, A; Fill, M; Stefani, E et al. (1993) Cytoplasmic Ca2+ does not inhibit the cardiac muscle sarcoplasmic reticulum ryanodine receptor Ca2+ channel, although Ca(2+)-induced Ca2+ inactivation of Ca2+ release is observed in native vesicles. J Membr Biol 135:49-59

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