Abstract

Late gestation fetal sheep will be treated to create systemic and pulmonary arterial hypertensions. One group will have high circulating angiotensin-II levels. There will be two normotensive control groups, one with normal and one with low angiotensin-II. The animals will be studied as fetuses, as newborns and as young adults. Circulatory measurements will include arterial pressures, right and left atrial pressures and cardiac outputs. We will also make plasma renin activity/renal ar6terial pressure response curves and measurements of glomerular filtration rates. Analytical measurements will include plasma renin activities, circulating angiotensin-II levels, catecholamines, plasma protein and blood hemoglobin concentrations, blood gases, osmolalities and electrolytes. Coronary pressure-flow relations will be determined under anesthesia with and without chemical dilation by means of adenosine infusions to determine coronary reserve. The animals will be killed for structural studies of heart and kidney. It is anticipated that prenatal hypertensions will produce lasting circulatory abnormalities later in life.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Research Program Projects (P01)
Project #
2P01HD034430-06
Application #
6595222
Study Section
Project Start
2002-06-01
Project End
2007-05-31
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
6
Fiscal Year
2002
Total Cost
$312,755
Indirect Cost

  Institution

Name
Oregon Health and Science University
Department
Type
DUNS #
009584210
City
Portland
State
OR
Country
United States
Zip Code
97239

  Publications

Kolahi, Kevin S; Valent, Amy M; Thornburg, Kent L (2017) Cytotrophoblast, Not Syncytiotrophoblast, Dominates Glycolysis and Oxidative Phosphorylation in Human Term Placenta. Sci Rep 7:42941
Midgett, Madeline; Thornburg, Kent; Rugonyi, Sandra (2017) Blood flow patterns underlie developmental heart defects. Am J Physiol Heart Circ Physiol 312:H632-H642
Wallace, Alexandra H; Dalziel, Stuart R; Cowan, Brett R et al. (2017) Long-term cardiovascular outcome following fetal anaemia and intrauterine transfusion: a cohort study. Arch Dis Child 102:40-45
Burton, Graham J; Fowden, Abigail L; Thornburg, Kent L (2016) Placental Origins of Chronic Disease. Physiol Rev 96:1509-65
Barry, James S; Rozance, Paul J; Brown, Laura D et al. (2016) Increased fetal myocardial sensitivity to insulin-stimulated glucose metabolism during ovine fetal growth restriction. Exp Biol Med (Maywood) 241:839-47
Thornburg, Kent L; Kolahi, Kevin; Pierce, Melinda et al. (2016) Biological features of placental programming. Placenta 48 Suppl 1:S47-S53
Chadderdon, Scott M; Belcik, J Todd; Bader, Lindsay et al. (2016) Temporal Changes in Skeletal Muscle Capillary Responses and Endothelial-Derived Vasodilators in Obesity-Related Insulin Resistance. Diabetes 65:2249-57
Kolahi, Kevin; Louey, Samantha; Varlamov, Oleg et al. (2016) Real-Time Tracking of BODIPY-C12 Long-Chain Fatty Acid in Human Term Placenta Reveals Unique Lipid Dynamics in Cytotrophoblast Cells. PLoS One 11:e0153522
Jonker, Sonnet S; Davis, Lowell; Soman, Divya et al. (2016) Functional adaptations of the coronary microcirculation to anaemia in fetal sheep. J Physiol 594:6165-6174
Jonker, S S; Louey, S (2016) Endocrine and other physiologic modulators of perinatal cardiomyocyte endowment. J Endocrinol 228:R1-18

Showing the most recent 10 out of 97 publications