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Many heart diseases are associated with impairment of energetics of the heart. Improving the heart's energetics can lead to improved survival and long-term outcomes. Perhexiline is a heart medication that works by improving the way the heart uses energy. Although effective, it is associated with long-term toxicities. Better understanding of this medication may lead to less adverse effects and also provide a basis for further investigation of drug development in the future.
Damage To Arterial Extracellular Matrix Induced By Reactive Nitrogen Species And Its Consequences
Funder
National Health and Medical Research Council
Funding Amount
$326,250.00
Summary
It is well established that lipids accumulate in the artery wall during the development of atherosclerosis (hardening of the arteries), and that much of this lipid arises from low-density lipoproteins (LDL). The uptake of cholesterol and lipids from LDL by cells present in the arterial wall is normally tightly regulated and under feedback control, but modification of the LDL particles can result in their recognition by the scavenger receptors of macrophage cells and unregulated accumulation of l ....It is well established that lipids accumulate in the artery wall during the development of atherosclerosis (hardening of the arteries), and that much of this lipid arises from low-density lipoproteins (LDL). The uptake of cholesterol and lipids from LDL by cells present in the arterial wall is normally tightly regulated and under feedback control, but modification of the LDL particles can result in their recognition by the scavenger receptors of macrophage cells and unregulated accumulation of lipids within such cells. The formation of these lipid-laden (foam) cells is a hallmark of atherosclerosis. Whilst this lipid accumulation is undesirable, if the resulting lesions are stable they are of less concern than those that are unstable and prone to rupture. Rupture of lesions and consequent blood clot formation (thrombosis) are a prime cause of sudden heart death and stroke. Despite considerable effort the reasons for plaque rupture are poorly understood. This study will investigate one potential mechanism by which lesions might become destabilised and prone to rupture. We will investigate the role of reactive intermediates in inducing damage to the extracellular matrix. Reactive intermediates are known to be generated by inflammatory cells, and it is well established that these cells are present at elevated levels in lesions. The extracellular matrix is responsible for maintaining the 3-dimensional structure of biological systems including the artery wall, and damage or fragmentation of this material may weaken this scaffolding and make the lesions prone to rupture. We will also examine how such matrix damage affects the behaviour of cells within lesions. A detailed knowledge of which processes are important in lesion rupture is an essential prerequisite to the development of new therapeutic strategies.Read moreRead less
Does Inhibition Of Myeloperoxidase Attenuate Atherosclerosis?
Funder
National Health and Medical Research Council
Funding Amount
$572,659.00
Summary
This project examines whether inhibition of a protein that produces bleach and is part of the immune system inhibits the stiffening of arteries, i.e. the major cause of cardiovascular disease that leads to heart attack and stroke. The project uses a pharmacological approach, employing a new class of chemical compounds. If successful, the project will contribute to the establishing of a novel therapeutic target to combat cardiovascular disease.