Salt And Cardiovascular Disease: Does Acute Salt-Sensitivity Convey Greater Cardiovascular Risk?
Funder
National Health and Medical Research Council
Funding Amount
$597,578.00
Summary
Salt intake of Australian adults is 10X more than required. Further, salt intake in very young children is alarmingly high secondary to high consumption of salty snacks and processed food. High dietary salt intake has been associated with increased cardiovascular disease and death. We will examine the cardiovascular risks for adults and children on a high salt diet and examine whether switching to a low salt diet ameliorates the high blood pressure and heart disease caused by high salt diets
Genetic Markers For Retinal Arteriolar Narrowing And Risk Of Hypertension And Cardiovascular Disease
Funder
National Health and Medical Research Council
Funding Amount
$438,991.00
Summary
This submission proposes a study to identify the genes that determine retinal arteriolar narrowing - a marker of hypertension, and to examine how these genes interact with environmental factors, and to investigate if these genes do indeed predict persons at risk of heart disease.
Centre For Training In Clinical Cardiovascular And Cerebrovascular Research
Funder
National Health and Medical Research Council
Funding Amount
$2,000,000.00
Summary
This Centre proposes to expand its highly successful Centre of Clinical Excellence funded by NHMRC from 1998-2001. The Centre provided the opportunity in Western Australia for the highest quality clinical research training in comprehensive spheres relevant to the pathogenesis, prevention and therapeutics of cardiovascular disease, with an emphasis on the role of nutrition and lifestyle in relation to high blood pressure, arteriosclerosis, dyslipidaemia and the function of blood vessels. The new ....This Centre proposes to expand its highly successful Centre of Clinical Excellence funded by NHMRC from 1998-2001. The Centre provided the opportunity in Western Australia for the highest quality clinical research training in comprehensive spheres relevant to the pathogenesis, prevention and therapeutics of cardiovascular disease, with an emphasis on the role of nutrition and lifestyle in relation to high blood pressure, arteriosclerosis, dyslipidaemia and the function of blood vessels. The new Centre will broaden the scope of its research and training activities, through the inclusion of clinical projects related to heart failure, clinical and epidemiological research into cerebrovascular disease and stroke and research training opportunities with respect to clotting disorders and therapeutics for thrombosis.Read moreRead less
A Fully Implantable Self Powered Extra Aortic Counterpulsation Device? For Translational Development In Hypertensive Heart Failure
Funder
National Health and Medical Research Council
Funding Amount
$901,586.00
Summary
The development of a low cost self-powered cardiac aortic assist device to improve blood flow to the heart and rest of the body. The device is placed on the external surface of the large blood vessel (aorta) leaving the heart and provides gentle counterpulsation to improve blood flow. This aortic cardiac assist device is a therapeutic treatment for early stage heart failure.
Nox4-containing NADPH-oxidase As A Protective Enzyme In The Cerebral Circulation
Funder
National Health and Medical Research Council
Funding Amount
$515,812.00
Summary
Failure of the cerebral circulation to meet the brain's immediate high nutritive requirements results in a stroke in just a few minutes. Stroke continues to be a major cause of death and disability, and this major medical challenge requires urgent research at the basic level to better understand the processes of normal, and then abnormal, regulation of brain artery function. The project will test the importance of a newly discovered mechanism for increasing brain blood flow. This involves activa ....Failure of the cerebral circulation to meet the brain's immediate high nutritive requirements results in a stroke in just a few minutes. Stroke continues to be a major cause of death and disability, and this major medical challenge requires urgent research at the basic level to better understand the processes of normal, and then abnormal, regulation of brain artery function. The project will test the importance of a newly discovered mechanism for increasing brain blood flow. This involves activation of an enzyme, Nox4-containing NADPH-oxidase, to generate oxygen radicals which then relax the wall of blood vessels causing the arteries to let more blood through. We believe that this process plays an important role in the normal, healthy maintenance of blood supply to the brain. Furthermore, we propose that the activity of this enzyme is elevated and therefore protective in brain arteries during high blood presure - which is the major risk factor for stroke. We will specifically test whether the activity of this enzyme actually helps to limit the amount of brain death following stroke. We will use a variety of techniques to assess the importance of this enzyme in brain arteries in the living body, and also in isolated segments of brain artery from animals that are either healthy or have diseased brain arteries. The results are expected to provide major new insight into processes that help maintain brain blood flow under normal conditions and after a stroke, and the knowledge gained here should lead to safer therapies to prevent or treat stroke.Read moreRead less
A Factorial Randomised Trial Of Intensive Blood Pressure Lowering And Glucose Control In Subjects With Type 2 Diabetes.
Funder
National Health and Medical Research Council
Funding Amount
$303,330.00
Summary
People with diabetes are well known to be at high risk of developing major health problems earlier in life than people without diabetes. In particular, people with diabetes are more likely to suffer from heart attacks, stroke, blindness, kidney failure and leg ulcers that may lead to amputation. Studies of diabetics have shown that if blood pressure levels or glucose levels are uncontrolled, the risk of complications is much higher. Careful management of these two risk factors is therefore now a ....People with diabetes are well known to be at high risk of developing major health problems earlier in life than people without diabetes. In particular, people with diabetes are more likely to suffer from heart attacks, stroke, blindness, kidney failure and leg ulcers that may lead to amputation. Studies of diabetics have shown that if blood pressure levels or glucose levels are uncontrolled, the risk of complications is much higher. Careful management of these two risk factors is therefore now a cornerstone of diabetic care and there are well-established guidelines for treatment. However, there is new evidence to suggest that tighter control of blood pressure and glucose levels than is currently recommended might result in even greater benefits. ADVANCE (Action in Diabetes and Vascular Disease) is a large new study that has been designed by Australian researchers based at the Institute for International Health in Sydney. The aim of ADVANCE is to see if treatment to control blood pressure and glucose levels more tightly than usual reduces the risk of complications among adult diabetics. The study will include 10,000 individuals recruited from about 20 countries worldwide that will be followed for an average of 4.5 years. The first participants will be enrolled in April 2001 and the study results should be available by the end of 2006. There are presently about 300 million people in the world with diabetes and this number is increasing rapidly. The results of ADVANCE will therefore influence the care of a very large number of people. If the findings of the study were positive, implementation of the new treatments could be expected to prevent many tens of thousands of premature heart attacks and strokes around the world each year.Read moreRead less
Drugs that block the mineralocorticoid receptor (MR), which responds to adrenal hormones, protect against heart disease and hypertension. We have shown that this effect is in part due to MR blockade in inflammatory cells. This novel finding is being explored further to understand the precise role of the MR in inflammatory cells in normal physiology and in disease. An understanding of the role of the MR in different tissues will enable development of tissue specific treatments for heart disease.
Does Maladaptive Remodelling Of The Heart And Vasculature In Response To Preterm Birth Lead To Long-term Cardiovascular Risk?
Funder
National Health and Medical Research Council
Funding Amount
$535,086.00
Summary
Being born prematurely is linked to the development of high blood pressure (a major risk factor for cardiovascular disease) later in life. In this project we will examine whether injury to the cells lining the cardiovascular system and/or structural changes in the wall of the arteries and the heart, as a result of being born early, lead to an elevation in blood pressure and heart dysfunction in adulthood.
Neural Versus Humoral Activation Of The Sympathetic Nervous System In Renal Disease
Funder
National Health and Medical Research Council
Funding Amount
$293,567.00
Summary
In the healthy body, the kidney and the sympathetic nervous system work together to keep our blood pressure in the normal range, both in the short and long term. When people have kidney disease, this system fails and people can develop high blood pressure. High blood pressure can lead to heart attack and stroke, and so is a serious complication for people who already have kidney disease. It has previously been believed that major factors in this process are fluid retention and a circulating horm ....In the healthy body, the kidney and the sympathetic nervous system work together to keep our blood pressure in the normal range, both in the short and long term. When people have kidney disease, this system fails and people can develop high blood pressure. High blood pressure can lead to heart attack and stroke, and so is a serious complication for people who already have kidney disease. It has previously been believed that major factors in this process are fluid retention and a circulating hormone called angiotensin II, but we believe that the sympathetic nervous system is also very important. Further, we believe that sensory nerves in the kidney tell the brain something is wrong in the kidney, making the sympathetic nervous system increase blood pressure inappropriately. We will examine the relative role of the sensory nerves and the hormone angiotensin II in driving the sympathetic nervous system to increase blood pressure, using three different rat models of kidney disease. One of these models is a new rat model of polycystic kidney disease, which is the fourth most important cause of renal disease in Australia. We want to determine what parts of the brain are important in the pathway, and will also test treatments that block the two different pathways (nerves vs. hormones) to see what is the most effective way of controlling not only blood pressure but also slowing down the progression of kidney and heart disease. This work is important as it will not only help us understand how the brain and kidney communicate with each other, but will also have the potential to improve quality of treatment for people with kidney diseaseRead moreRead less