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Mechanisms Of Oxidised Protein Accumulation In Ageing Cells
Funder
National Health and Medical Research Council
Funding Amount
$429,000.00
Summary
Australia has one of the world's most rapidly ageing populations. It is estimated that in 30 years time over 30% of the population will be over 65; many will suffer from a debilitating, age-related disease. The diseases of ageing represent one of the major health challenges this century. Despite their increasing incidence, our understanding of the underlying causes is limited. A common feature is the accumulation of damaged proteins in cells and tissues. Damaged proteins are usually broken down ....Australia has one of the world's most rapidly ageing populations. It is estimated that in 30 years time over 30% of the population will be over 65; many will suffer from a debilitating, age-related disease. The diseases of ageing represent one of the major health challenges this century. Despite their increasing incidence, our understanding of the underlying causes is limited. A common feature is the accumulation of damaged proteins in cells and tissues. Damaged proteins are usually broken down by the cells and replaced, but in many age-related diseases this process fails. The most common source of protein damage is attack by oxygen-derived free radicals. These are by-products of our body's need for oxygen and can originate from atmospheric pollutants. Oxygen rusts metal, makes fat go rancid and can cause irreparable damage to proteins and other biological molecules. Free radical damage contributes to the development of many age-related diseases such as atherosclerosis and neurodegenerative diseases such as Alzheimer's disease. The accumulation of damaged proteins can cause cell death. Our knowledge of the mechanisms by which cells remove proteins damaged by oxygen and the reasons for their accumulation is limited. In this project we will use a novel technique we have developed to generate oxidised proteins in ageing cells. We will identify cellular mechanisms required for the efficient removal of damaged proteins and those mechanisms which fail in ageing cells. We will focus on a group of proteins which protect damaged proteins from aggregating and accumulating and we will examine how we can prevent the accumulation of oxidised proteins by stimulating the body s defence mechanisms. Since the population of Australia is ageing, diseases of ageing are going to consume an increasing amount of the national health budget. A better knowledge of these cellular mechanisms will allow us to design effective prevention and treatment strategies which are at present lacking.Read moreRead less
Cytokine Signalling And Insulin Resistance In Obesity.
Funder
National Health and Medical Research Council
Funding Amount
$512,065.00
Summary
Western communities are experiencing an epidemic of obesity that is contributing to diabetes, heart disease, and premature death. This project is investigating why being overweight and obese causes diabetes. Improved understanding about how hormones regulates the body's storage and breakdown of fat and responsiveness to insulin will enable the development of new medicines for the treatment of obesity and the prevention of diabetes.
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.
Directed Molecular Evolution Of G Protein-coupled Receptors For Stable And Functional Expression In Escherichia Coli
Funder
National Health and Medical Research Council
Funding Amount
$383,479.00
Summary
Approximately half of all prescription drugs on the market act on G protein coupled receptors (GPCRs). The mechanisms underlying GPCR function are mainly unknown due to a lack of structural information. No solved structures exist for any of the estimated 800 human GPCRs, making it difficult to design new drugs. By applying advanced protein engineering techniques I aim to produce human GPCRs in bacteria to ultimately acquire structural information, which will enable novel drug development.
Discovery And Mechanisms Of Host Cell Factors In HIV Uncoating
Funder
National Health and Medical Research Council
Funding Amount
$635,098.00
Summary
HIV entry into the host cell involves release of its capsid, a protein shell protecting the viral genome. The capsid hijacks host proteins to cloak itself from cellular defenses while the cell has evolved sensors that can block viral infection. This proposal aims to discover proteins involved in this arms race between host and virus and decipher how they control capsid disassembly. This insight will help design new drugs against HIV infection and new ways to deliver genes for gene therapies.
Structural And Functional Analysis Of A Cancer-linked Co-regulator Complex
Funder
National Health and Medical Research Council
Funding Amount
$729,571.00
Summary
We seek to understand the mechanisms by which genes are switched on and off throughout our lifetime. A number of multi-component protein machines are involved in this process but their make-up and mechanism of action is not understood. We will investigate the structure and function of one of these machines that has been strongly linked to cancer.
Assembly And Function Of Two Interacting Oncogenic Scaffolds
Funder
National Health and Medical Research Council
Funding Amount
$705,585.00
Summary
Aberrant signaling by the protein kinase superfamily is a known driving force for many cancers and inflammatory diseases. Recently, a subset of kinase-like proteins, termed pseudokinases, have emerged as crucial regulators of kinase signalling pathways. This proposal focuses on elucidating the scaffolding function and assembly of two pseudokinases, termed SgK223 and SgK269, which display oncogenic properties and aims to understand how their signalling abilities are subverted in a disease state.
Design And Engineering Of Adnectins For Diagnosis And Therapy
Funder
National Health and Medical Research Council
Funding Amount
$803,152.00
Summary
This project aims to engineer a naturally-occurring human protein, called an adnectin, to produce molecules that are able to bind specific targets in the human body, and as such may be used in the diagnosis and therapy of a range of diseases.
Prion-like Behaviour In Immunity: Super-sized Signalling Platforms?
Funder
National Health and Medical Research Council
Funding Amount
$611,995.00
Summary
Prions have been mostly associated with pathologies but recent discoveries show that prion-like behaviour may be beneficial, enhancing our immune response for example. To test this, we want to systematically explore all human proteins involved in the defence against pathogens, find new prion-like trends and probe their role in the innate immune response.