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Interactions Between RAGE And The Type 1 Angiotensin Receptor Determine The Pro-atherosclerotic Actions Of Angiotensin II
Funder
National Health and Medical Research Council
Funding Amount
$521,956.00
Summary
Heart attacks and strokes are a major cause of death and disability in Australians. Activation of the renin angiotensin system plays a key role in the development and progression of atherosclerosis, the process that leads to narrowing and obstruction of arteries. In preliminary data we have found a way to block these pathways without affecting the control of blood pressure. We believe that interventions based on these data will be important for the prevention and treatment of heart disease.
Novel Treatments Of Fibrosis For Hypertensive Heart Disease
Funder
National Health and Medical Research Council
Funding Amount
$912,536.00
Summary
A recognised risk factor for cardiovascular disease is high blood pressure which contributes to a stiffer heart that can ultimately lead to heart failure. There are very few treatments that can reduce heart stiffening, called fibrosis. This project is focused on the preclinical testing of novel compounds that we have developed to reverse the build-up of fibrosis in the heart, which will lead to better treatment of elderly patients with high blood pressure and poorly-functioning hearts.
DEFINING NONCLASSICAL ANGIOTENSIN SIGNALLING AND CARDIOVASCULAR FUNCTION
Funder
National Health and Medical Research Council
Funding Amount
$634,580.00
Summary
Angiotensin II is a hormone which is well known to contribute to high blood pressure and cardiovascular disease. This proposal will use highly novel compounds that we have synthesised that, for the first time, selectively target nonclassical angiotensin-related binding sites, so called NON-AT1 receptors, which are thought to counteract the deleterious effects of angiotensin II that normally causes fibrosis or scarring of the heart which damages healthy muscle.
Insulin Regulated Aminopeptidase: A New Cardiovascular Target
Funder
National Health and Medical Research Council
Funding Amount
$672,650.00
Summary
Cardiovascular disease, leading to heart attack or stroke is the largest cause of death in Australia. We have evidence that inhibition of a newly described enzyme (IRAP) by angiotensin IV is protective in a model of atherosclerosis. Excitingly we have preliminary data indicating that mice deficient in IRAP have better vascular function therefore we will further investigate this as well as the effectiveness of newly developed IRAP inhibitors in preventing development of cardiovascular disease.
New Mediators Of GPCR-growth Factor Receptor Transactivation
Funder
National Health and Medical Research Council
Funding Amount
$607,842.00
Summary
Hormones bind to receptors on the surface of cells. Receptors can modify each other’s function and this “cross-talk” is important for the receptors for a peptide hormone (termed angiotensin) and a growth factor receptor (EGFR), which are major regulators of the cardiovascular system. We have identified a number of mediators of the angiotensin-EGFR crosstalk and this current grant aims to use molecular and cellular and in vivo approaches to examine the molecular basis of their actions.
Mechanism Of Epidermal Growth Factor Receptor Transactivation
Funder
National Health and Medical Research Council
Funding Amount
$578,268.00
Summary
This application examines the cellular events that control heart growth in response to angiotensin, a hormone linked to heart failure. We believe that the same cell processes are also involved in cancer cell growth and by understanding the mechanism by which angiotensin promotes growth, better therapies against human cardiovascular disease and its relationship to uncontrolled growth will evolve.
Physiology Of A Mutant Angiotensin Receptor Associated With Cardiac Hypertrophy
Funder
National Health and Medical Research Council
Funding Amount
$293,699.00
Summary
As many as one in ten healthy individuals have hearts that are bigger than normal. Careful scientific investigation has revealed that the bigger one's heart, the greater the risk of dying from cardiovascular disease. This is true even in the absence of known causes of heart disease. Unlike high blood pressure or cholesterol, the size of the heart is not easily measured and enlargement often goes undetected. We were among the first internationally to discover genetic clues to enlarged hearts. We ....As many as one in ten healthy individuals have hearts that are bigger than normal. Careful scientific investigation has revealed that the bigger one's heart, the greater the risk of dying from cardiovascular disease. This is true even in the absence of known causes of heart disease. Unlike high blood pressure or cholesterol, the size of the heart is not easily measured and enlargement often goes undetected. We were among the first internationally to discover genetic clues to enlarged hearts. We identified a region on a rat chromosome that influences heart size and we have now discovered abnormalities in a key gene in this region. These changes alter the function of a cellular protein that mediates hormonal effects on heart cell size. Our team of experts will employ the most modern technologies to understand exactly how this altered protein affects heart cell function and growth. We have a unique opportunity to exploit this experiment of nature to help us devise new means of preventing big hearts and their fatal complications in humans.Read moreRead less