The Persisting Vascular Effects Of Activation Of The Renin-Angiotensin System
Funder
National Health and Medical Research Council
Funding Amount
$628,456.00
Summary
Heart attacks and strokes are the major cause of death and disability in Australians. Heart disease is widely viewed to be the legacy of our diet and lifestyle, and even that of our parents. We propose to explore in detail the molecular mechanism of how this imprinting comes about and identify new targets to prevent, retard or reverse heart disease.
Analysis And Development Of Medicinal Herbs For The Prevention And Management Of Cardiovascular Disease
Funder
National Health and Medical Research Council
Funding Amount
$358,500.00
Summary
Although medicinal herbs are widely used in the community for the prevention and management of cardiovascular disease, to date no systemic, effective methods are available to assess the physiological effects of these substances. This project will employ advanced bio-cellular and molecular technologies to develop (i) screening procedures, (ii) standardised chemical analyses and (iii) bioassays to allow efficient assessment of new herbal pharmaceuticals in relation to possible cardiovascular activ ....Although medicinal herbs are widely used in the community for the prevention and management of cardiovascular disease, to date no systemic, effective methods are available to assess the physiological effects of these substances. This project will employ advanced bio-cellular and molecular technologies to develop (i) screening procedures, (ii) standardised chemical analyses and (iii) bioassays to allow efficient assessment of new herbal pharmaceuticals in relation to possible cardiovascular activities, side effects, purity and quality.Read moreRead less
Effects Of Risk Factor Control On Atherosclerosis, Vasoreactivity And Cardiac Ischemia In Patients On Dialysis
Funder
National Health and Medical Research Council
Funding Amount
$212,126.00
Summary
End-stage renal failure is one of the commonest serious chronic diseases; in Australia, over 10,000 patients are in dialysis programs or have functioning transplants. The commonest cause of death in this patient group is coronary artery disease, and attempts are routinely made to identify patients with this problem, with the intent of controlling this risk by angioplasty or bypass surgery. Unfortunately, these procedures may be less effective than usual, because the process of artery narrowing i ....End-stage renal failure is one of the commonest serious chronic diseases; in Australia, over 10,000 patients are in dialysis programs or have functioning transplants. The commonest cause of death in this patient group is coronary artery disease, and attempts are routinely made to identify patients with this problem, with the intent of controlling this risk by angioplasty or bypass surgery. Unfortunately, these procedures may be less effective than usual, because the process of artery narrowing is more aggressive in patients with renal disease. Moreover, this process may cause patients with negative testing for coronary disease at one point in time to develop coronary problems over follow-up. In this study, we propose to use a standard stress testing protocol to stratify the risk of coronary events in a group of at risk patients on dialysis. Those at highest risk will undergo bypass surgery, while those at intermediate and low risk will be randomized to usual care, or an aggressive treatment of atheroma with cholesterol reduction, folic acid supplementation (aiming to normalize homocysteine), blood pressure and blood sugar control. The effects of this approach will be followed by examination of biochemical markers of atherosclerosis, and imaging of arterial thickness and reactivity (reflecting tests of structure and function of the vasculature). We will also assess of the progression or reduction of abnormal cardiac stress responses, and the occurence of events at follow-up. Finally, follow-up data will be used to compare the predictive value of the 2 stress testing protocols. The results of this study will enhance our understanding of the importance of the atherosclerotic process in renal patients, and move the management approach for coronary disease in renal failure toward active risk factor control and away from revascularization.Read moreRead less
Is NADPH Oxidase The Trigger For Accelerated Atherosclerosis Caused By Bacteria?
Funder
National Health and Medical Research Council
Funding Amount
$465,210.00
Summary
Cardiovascular disease is the leading cause of death and morbidity world-wide. However, its incidence is not fully explained by the presence of conventional risk factors, such as high cholesterol, hypertension, diabetes and cigarette smoking. Steadily growing evidence indicates that bacterial infection, particularly by Chlamydia pneumoniae and Helicobacter pylori, is also strongly linked to atherosclerotic lesion formation and increased risk of a cardiovascular event. This project will investiga ....Cardiovascular disease is the leading cause of death and morbidity world-wide. However, its incidence is not fully explained by the presence of conventional risk factors, such as high cholesterol, hypertension, diabetes and cigarette smoking. Steadily growing evidence indicates that bacterial infection, particularly by Chlamydia pneumoniae and Helicobacter pylori, is also strongly linked to atherosclerotic lesion formation and increased risk of a cardiovascular event. This project will investigate a new aspect to the body s defence against bacterial infection which involves production of oxygen radicals by the blood vessel wall. We propose that although this response of the artery to bacteria in the blood is beneficial in the short term, it inadverently initiates a chronic inflammatory process that ultimately accelerates development of artery disease. If this is the case, the oxygen radical production by the enzyme, NADPH oxidase, in the artery wall may represent the missing link between bacterial infection and atherosclerosis. We will therefore firstly test whether two bacteria, Chlamydia pneumoniae and Helicobacter pylori, can acutely induce artery inflammation in this way. We will then perform definitive studies to test whether mice infected with these bacteria develop accelerated atherosclerosis, and if so, whether this effect is dependent on NADPH oxidase activity in the artery wall. Finally, we will test the efficacy and importance of timing of antibiotic therapy to prevent atherosclerotic lesion formation.Read moreRead less
A Population-based Birth Cohort Study Of The Development Of Atherosclerosis In Early Life
Funder
National Health and Medical Research Council
Funding Amount
$780,067.00
Summary
Cardiovascular disease (heart attack and stroke) are leading causes of death and illness in adults in Australia. The changes in blood vessels that lead to these conditions begin before birth. This project investigates the factors that contribute to these early changes from birth onwards, and will facilitate development of targeted prevention in high-risk groups to reduce cardiovascular disease in later life.
Atherosclerosis - The Key Roles Of HDL, Cell Cholesterol Metabolism And Vascular Function
Funder
National Health and Medical Research Council
Funding Amount
$7,085,050.00
Summary
Atherosclerosis, an accumulation of cholesterol in the artery wall, is a major cause of illness and premature death worldwide. It is caused by conditions such as low levels of the protective high density lipoproteins (HDLs), diabetes, smoking and abnormal function of arteries, all of which are linked to disorders of cholesterol metabolism. With our expertise in HDLs, cholesterol metabolism and artery function, our research will lead to the development of novel strategies for early detection and ....Atherosclerosis, an accumulation of cholesterol in the artery wall, is a major cause of illness and premature death worldwide. It is caused by conditions such as low levels of the protective high density lipoproteins (HDLs), diabetes, smoking and abnormal function of arteries, all of which are linked to disorders of cholesterol metabolism. With our expertise in HDLs, cholesterol metabolism and artery function, our research will lead to the development of novel strategies for early detection and prevention of atherosclerosis and heart disease.Read moreRead less