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A Novel Lipid Sensitive Kinase And Its Role In Obesity-induced Inflammation And Insulin Resistance.
Funder
National Health and Medical Research Council
Funding Amount
$560,045.00
Summary
It is now apparent that obesity leads to chronic low grade inflammation which results in insulin resistance or pre-diabetes. The mechanisms that link obesity-induced inflammation to insulin resistance are not well understood, but involve lipid oversupply. We have preliminary data identifying that a protein, not known to previously play a role in metabolic diseases, is a critical mediator of lipid-induced inflammation. We will investigate the clinical potential of blocking this protein.
Can Blocking Fatty Acid Transport In Myeloid Cells Prevent Insulin Resistance?
Funder
National Health and Medical Research Council
Funding Amount
$511,294.00
Summary
Over the past 5 years it has become apparent that blood cells can become inflamed as people become obese. These inflamed blood cells can contribute to insulin resistance or pre-diabetes. Our hypothesis is that these blood cells become inflamed because they take up fat via fatty acid transporters. Our approach is to knock out one of these fatty acid transporters specifically in blood cells and reduce inflammation and insulin resistance due to overnutrition.
Control Of The Cholesterol Esterification Cycle In Macrophages
Funder
National Health and Medical Research Council
Funding Amount
$150,660.00
Summary
Atherosclerosis is the disease which narrows arteries and causes heart attacks. It is the most important cause of death in Australia. Although certain treatments such as lowering blood cholesterol reduce the incidence of heart attack, the current mortality from this conditions indicates that there is a great need to improve our understanding and treatment of atherosclerosis. In atherosclerotic arteries, cells called macrophages contain excess cholesterol in the form of cholesteryl ester droplets ....Atherosclerosis is the disease which narrows arteries and causes heart attacks. It is the most important cause of death in Australia. Although certain treatments such as lowering blood cholesterol reduce the incidence of heart attack, the current mortality from this conditions indicates that there is a great need to improve our understanding and treatment of atherosclerosis. In atherosclerotic arteries, cells called macrophages contain excess cholesterol in the form of cholesteryl ester droplets. It appears that human cells are very inefficient at clearing such cholesteryl esters, and this may explain why atherosclerosis is difficult to treat. In this proposal we will investigate how macrophages metabolise these cholesteryl esters and how this process can be stimulated. The results of this study should enable novel treatments of this serious condition to be developed.Read moreRead less
Role Of An Endogenously Synthesised Sterol In Regulating Cholesterol Removal From The Macrophage
Funder
National Health and Medical Research Council
Funding Amount
$276,000.00
Summary
Heart disease remains the greatest killer of Australians and involves accumulation of cholesterol in the artery wall. Cholesterol accumulates in a specific cell-type called the macrophage (literally means ' big-eater'). Once macrophages accumulate cholesterol, they become bloated cholesterol-filled foam cells. The early and persistent appearance of foam cells in diseased artery suggests that foam cells are active participants in the development of heart disease. Prevention or reversal of their f ....Heart disease remains the greatest killer of Australians and involves accumulation of cholesterol in the artery wall. Cholesterol accumulates in a specific cell-type called the macrophage (literally means ' big-eater'). Once macrophages accumulate cholesterol, they become bloated cholesterol-filled foam cells. The early and persistent appearance of foam cells in diseased artery suggests that foam cells are active participants in the development of heart disease. Prevention or reversal of their formation is therfore an attractive target for new therapies to treat heart disease. In this proposal, we address specific questions which will increase our understanding of how best to prevent or reverse foam cell formation. This work may indicate new therapeutic possibilities for combating heart disease.Read moreRead less
The Hippo/Yap Pathway Reprograms Glucose Metabolism To Fuel Tissue Growth.
Funder
National Health and Medical Research Council
Funding Amount
$659,105.00
Summary
Liver disease is a common cause of sickness and death in Australia. While factors critical to liver function are known, the cellular networks responsible for causing liver cancer are largely undefined. Our studies will use zebrafish as a model to study how the circuit known as the Hippo pathway reprograms metabolism to promote liver cancer. These studies will enhance our understanding how metabolism regulates liver growth and identify therapeutic targets to combat liver cancer.
Molecular Approaches To Cardiac Development, Disease And Regeneration
Funder
National Health and Medical Research Council
Funding Amount
$863,910.00
Summary
Prof Harvey’s work explores the molecular and cellular networks that underpin heart development in the embryo and heart regeneration in the adult, and how these networks unravel in heart disease. Based on this knowledge, his work seeks to develop novel approaches for alleviating suffering in babies with congenital heart defects and adults enduring the devastating consequences of heart attack or heart failure.
Redirecting Carbon Flow through Mesophyll and Bundle Sheath Cells of Sugarcane to Produce Poly-3-Hydroxybutyrate. This project is part of the National Priorities "Frontier Technologies for Building and Transforming Australian Industries." Using innovative plant metabolic engineering technologies combined with sophisticated computer modeling we are generating green plants that produce renewable, biodegradable, bioplastics possessing properties such that they are suitable replacements for petrol ....Redirecting Carbon Flow through Mesophyll and Bundle Sheath Cells of Sugarcane to Produce Poly-3-Hydroxybutyrate. This project is part of the National Priorities "Frontier Technologies for Building and Transforming Australian Industries." Using innovative plant metabolic engineering technologies combined with sophisticated computer modeling we are generating green plants that produce renewable, biodegradable, bioplastics possessing properties such that they are suitable replacements for petroleum-derived products in many applications. During the course of these studies, we are increasing our basic level of understanding of plant metabolism of important bioenergy crops. The production of renewable, bioplastics in sugarcane will help to diversify the Australian sugarcane industry by providing a value-added product with significant world-wide markets.Read moreRead less
A unified model of amino acid homeostasis. This project aims to develop a unified model of amino acid homeostasis in mammalian cells and apply it to brain cells. The model will be underpinned by a mathematical algorithm that allows predicting amino acid levels in the cytosol based on fundamental parameters such as transport and metabolism. This project should provide the significant benefit of enabling the prediction of essential functions such as cell growth and survival.
The effect of nitrogen monoxide on intracellular iron metabolism. We discovered that the crucial signalling molecule nitrogen monoxide (NO) mediates iron (Fe) and glutathione (GSH) release by the transporter MRP1 probably as an NO-Fe-GSH complex [DR(2006) PNAS USA 103:7670-5]. During our current ARC grant we have markedly extended these findings by showing that another molecule, GST Pi and MRP1 form part of a coordinated system that stores and transports NO as complexes of Fe and GSH, markedly e ....The effect of nitrogen monoxide on intracellular iron metabolism. We discovered that the crucial signalling molecule nitrogen monoxide (NO) mediates iron (Fe) and glutathione (GSH) release by the transporter MRP1 probably as an NO-Fe-GSH complex [DR(2006) PNAS USA 103:7670-5]. During our current ARC grant we have markedly extended these findings by showing that another molecule, GST Pi and MRP1 form part of a coordinated system that stores and transports NO as complexes of Fe and GSH, markedly extending NO half-life from milliseconds to hours. This has broad implications for understanding NO activity in many processes which have major vital health implications, including tumour cell killing by macrophages and blood pressure control.Read moreRead less
The Effect of Nitrogen Monoxide on Intracellular Iron Metabolism. For the first time, we discovered that nitric oxide (NO) is actively transported from cells by a protein that is known to also transport glutathione (GSH). This is important, as NO was thought to passively diffuse from cells. Active transport overcomes the problems of diffusion which is inefficient and non-targeted. Moreover, NO is released as a complex with iron and GSH which markedly increases its half-life. These findings have ....The Effect of Nitrogen Monoxide on Intracellular Iron Metabolism. For the first time, we discovered that nitric oxide (NO) is actively transported from cells by a protein that is known to also transport glutathione (GSH). This is important, as NO was thought to passively diffuse from cells. Active transport overcomes the problems of diffusion which is inefficient and non-targeted. Moreover, NO is released as a complex with iron and GSH which markedly increases its half-life. These findings have broad implications for understanding the activity of NO in many processes which have major health implications, including tumour cell killing by macrophages, blood pressure etc.Read moreRead less