A major long-term goal of this Program Project Grant (PPG) has been to develop a quantitative systems analysis of cardiovascular (CV) dynamics and related control systems, including the kidneys, the sympathetic nervous system (SNS), endothelial factors, and the endocrine system. Our experimental studies have focused on understanding the basic molecular and physiological control mechanisms of each component of the circulation, the feedback systems that coordinate these components, and integration of this information into a composite systems analysis of CV regulation. Another key objective has been to translate our research on basic mechanisms of CV control to understanding the pathophysiology of disorders such as hypertension (HT). The current focus of the PPG is on neurohumoral, endothelial, and intrarenal mechanisms that contribute to impaired pressure natriuresis and increased blood pressure (BP) in experimental models that are highly relevant to common, and difficult to treat, forms of human HT caused by obesity, preeclampsia, and postmenopausal hyperandrogenemia. Four unique features of this program are: 1) it utilizes an integrative approach to understand complex interactions between multiple components of CV control systems;2) it focuses mainly on long-term control of the circulation because many CV diseases, such as HT, are manifestations of abnormal control mechanisms that develop slowly over long periods of time;3) it utilizes unique experimental models that mimic common forms of human HT, including obesity, preeclampsia, and postmenopausal-induced HT;4) it uses mathematical modeling and systems analyses to provide a conceptual framework for understanding cardiovascular dynamics and renal, endothelial, hormonal and neural mechanisms of HT. The research proposed in this application is described by the titles of the projects as follows: I. Neurohumoral and Renal Mechanisms of Hypertension: this project will elucidate the neurohumoral mechanisms, central nervous system (CNS) circuits and signaling pathways that mediate obesity induced SNS activation, impaired renal-pressure natriuresis, and HT as well as regulation of energy balance and metabolism;II. Endothelial Factors, the Kidney and Hypertension: this project will determine the role of obesity in altering multiple factors released by the placenta that cause endothelial dysfunction, impaired renal-pressure natriuresis, and HT during chronic reductions in uterine perfusion pressure in pregnancy. III. Hormonal and Intrarenal Mechanisms of Postmenopausal Hypertension: this project will determine the role of increased SNS activity, CNS signaling pathways, and intrarenal mechanisms that increase renal vascular resistance, blunt pressure natriuresis and raise BP in postmenopausal HT associated with hyperandrogenemia. The total program, including core support services, provides a unique interdisciplinary approach toward developing an integrative analysis of long-term regulation of BP and circulatory dynamics in forms of experimental HT that have great relevance to human HT.

Public Health Relevance

OVERALL NARRATIVE Although considerable progress has been made in understanding the causes of hypertension and its impact on cardiovascular (CV) and kidney disease, suboptimal blood pressure control is still the number one attributable risk for death throughout the world. This program project application brings together investigators from multiple disciplines to focus on the mechanisms that contribute to impaired kidney function and increased blood pressure in experimental models that are highly relevant to common, and difficult to treat, forms of human hypertension associated with obesity, preeclampsia, and postmenopausal increases in androgen levels.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Program Projects (P01)
Project #
2P01HL051971-21
Application #
8742631
Study Section
Heart, Lung, and Blood Program Project Review Committee (HLBP)
Program Officer
OH, Youngsuk
Project Start
1997-08-01
Project End
2019-05-31
Budget Start
2014-08-01
Budget End
2015-05-31
Support Year
21
Fiscal Year
2014
Total Cost
Indirect Cost
Name
University of Mississippi Medical Center
Department
Physiology
Type
Schools of Medicine
DUNS #
City
Jackson
State
MS
Country
United States
Zip Code
39216
Shekhar, Shashank; Cunningham, Mark W; Pabbidi, Mallikarjuna R et al. (2018) Targeting vascular inflammation in ischemic stroke: Recent developments on novel immunomodulatory approaches. Eur J Pharmacol 833:531-544
Quan, Nanhu; Wang, Lin; Chen, Xu et al. (2018) Sestrin2 prevents age-related intolerance to post myocardial infarction via AMPK/PGC-1? pathway. J Mol Cell Cardiol 115:170-178
Lindsey, Merry L; Mouton, Alan J; Ma, Yonggang (2018) Adding Reg3? to the acute coronary syndrome prognostic marker list. Int J Cardiol 258:24-25
Brooks, Heddwen L; Lindsey, Merry L (2018) Guidelines for authors and reviewers on antibody use in physiology studies. Am J Physiol Heart Circ Physiol 314:H724-H732
Aberdein, Nicola; Dambrino, Robert J; do Carmo, Jussara M et al. (2018) Role of PTP1B in POMC neurons during chronic high-fat diet: sex differences in regulation of liver lipids and glucose tolerance. Am J Physiol Regul Integr Comp Physiol 314:R478-R488
Eddy, Adrian C; Bidwell 3rd, Gene L; George, Eric M (2018) Pro-angiogenic therapeutics for preeclampsia. Biol Sex Differ 9:36
do Carmo, Jussara M; da Silva, Alexandre A; Moak, Sydney P et al. (2018) Role of melanocortin 4 receptor in hypertension induced by chronic intermittent hypoxia. Acta Physiol (Oxf) :e13222
Lindsey, Merry L; Bolli, Roberto; Canty Jr, John M et al. (2018) Guidelines for experimental models of myocardial ischemia and infarction. Am J Physiol Heart Circ Physiol 314:H812-H838
Chen, Xu; Li, Xuan; Zhang, Wenyan et al. (2018) Activation of AMPK inhibits inflammatory response during hypoxia and reoxygenation through modulating JNK-mediated NF-?B pathway. Metabolism 83:256-270
Ma, Yonggang; Mouton, Alan J; Lindsey, Merry L (2018) Cardiac macrophage biology in the steady-state heart, the aging heart, and following myocardial infarction. Transl Res 191:15-28

Showing the most recent 10 out of 767 publications