Optimising Exercise and Nutrition Throughout the Life Cycle. During the past decade the proportion of Australia's population aged 65 years and over has increased to 13% (2.7 million). During the same period, the proportion of the population aged 85 years and over has more than doubled and is now the fastest growing subpopulation in Australia. As the number of elderly persons continues to grow, sarcopenia-related conditions will have a dramatic and inevitable impact on the lives of all Australian ....Optimising Exercise and Nutrition Throughout the Life Cycle. During the past decade the proportion of Australia's population aged 65 years and over has increased to 13% (2.7 million). During the same period, the proportion of the population aged 85 years and over has more than doubled and is now the fastest growing subpopulation in Australia. As the number of elderly persons continues to grow, sarcopenia-related conditions will have a dramatic and inevitable impact on the lives of all Australians. The novel dietary protocols developed from the results of the studies undertaken in this proposal will translate into better treatment options for reversing age-dependent muscle degeneration. This is a critical first step for improving the standard of living for a large portion of Australian society.Read moreRead less
Biological Role of Contraction-Induced Heat Shock Protein Expression. It is well known that mammalian skeletal muscle increases its expression of a group of highly conserved proteins, the heat shock proteins (HSP) in response to repeated contraction. However, the biological role of this expression is unclear. The aim of this project is to determine the biological role of contraction-induced HSP expression. We expect to show that HSP synthesis in response to exercise has three major roles; 1) to ....Biological Role of Contraction-Induced Heat Shock Protein Expression. It is well known that mammalian skeletal muscle increases its expression of a group of highly conserved proteins, the heat shock proteins (HSP) in response to repeated contraction. However, the biological role of this expression is unclear. The aim of this project is to determine the biological role of contraction-induced HSP expression. We expect to show that HSP synthesis in response to exercise has three major roles; 1) to act to repair damaged proteins in recovery from muscle injury 2) to act as a "molecular motor" to translocate proteins from one region of a muscle cell to another and 3) to be released into the circulation in order to act as a central signal to activate immune cells. Such a project will be significant because it will allow for a fundamental understanding as to why these proteins are produced in response to exercise. We expect to enhance our understanding of fundamental cell biology.Read moreRead less
A microfluidic approach to study the mechanobiology of ageing blood vessels. This project aims to study the effect of the stiffening of ageing arteries in endothelial cells. It explores the changes that occur in endothelial cells using a unique microfluidic technology with tuneable wall stiffness to mimic the biophysical and biochemical properties of ageing arteries. The expected outcome is the identification of the cellular mechanisms that control endothelial responses to arterial stiffening. T ....A microfluidic approach to study the mechanobiology of ageing blood vessels. This project aims to study the effect of the stiffening of ageing arteries in endothelial cells. It explores the changes that occur in endothelial cells using a unique microfluidic technology with tuneable wall stiffness to mimic the biophysical and biochemical properties of ageing arteries. The expected outcome is the identification of the cellular mechanisms that control endothelial responses to arterial stiffening. This should provide the fundamental knowledge required to assist in the development of new therapies to tackle age-related conditions such as cardiovascular disease and dementia.Read moreRead less
Improving determinants of Australian sports talent identification and development: a multi-disciplinary approach. Sport is important to many Australians. Our sport successes enhance our national identity, generate community pride and attract mega sport events. Currently our sport talent identification and development (TID) systems have been surpassed by our international rivals who borrowed from and improved our knowledge. This project will help regain Australia's international advantage and aga ....Improving determinants of Australian sports talent identification and development: a multi-disciplinary approach. Sport is important to many Australians. Our sport successes enhance our national identity, generate community pride and attract mega sport events. Currently our sport talent identification and development (TID) systems have been surpassed by our international rivals who borrowed from and improved our knowledge. This project will help regain Australia's international advantage and again make Australian TID the international benchmark. Results will highlight the role of TID practices in improving recreational participation and maximising, attracting, developing and retaining sport talent. This will result in improved use of sports limited TID funding by providing greater understanding of factors that influence elite selection and sport development.Read moreRead less
Coping With Pressure: Respiratory Biology of Marine Mammals. Many marine mammals undergo severe, protracted lung collapse during deep dives. They also exhibit prolonged periods of apnea during sleep. In humans, lung collapse and sleep apnea both represent severe respiratory dysfunction. Pulmonary surfactant, a complex mixture that lines the lung, stabilises the lungs in terrestrial mammals, preventing lung collapse. Here, we propose a comprehensive examination of respiratory function in marine m ....Coping With Pressure: Respiratory Biology of Marine Mammals. Many marine mammals undergo severe, protracted lung collapse during deep dives. They also exhibit prolonged periods of apnea during sleep. In humans, lung collapse and sleep apnea both represent severe respiratory dysfunction. Pulmonary surfactant, a complex mixture that lines the lung, stabilises the lungs in terrestrial mammals, preventing lung collapse. Here, we propose a comprehensive examination of respiratory function in marine mammals. This study will significantly advance our knowledge of the diving physiology of Australian marine mammals. A detailed examination of the respiratory and surfactant systems of marine mammals may also reveal adaptations that enable these animals to endure sleep apnea and lung collapse.Read moreRead less
Modulating the molecular and cellular physiology of ageing skeletal muscle. Understanding the underlying mechanisms of how ageing affects muscle is of increasing importance to the community as the number of older persons in the population continues to escalate and the age of retirement increases. Old muscles are slower and weaker than young muscles, and are more easily injured. This proposal is focussed on developing safe therapies to prevent or reverse these age-related effects. Making old musc ....Modulating the molecular and cellular physiology of ageing skeletal muscle. Understanding the underlying mechanisms of how ageing affects muscle is of increasing importance to the community as the number of older persons in the population continues to escalate and the age of retirement increases. Old muscles are slower and weaker than young muscles, and are more easily injured. This proposal is focussed on developing safe therapies to prevent or reverse these age-related effects. Making old muscles young again, is a research strategy that will promote healthy ageing and enable older Australians to enjoy a better quality of life.Read moreRead less
Relaxin: molecular mechanisms of action in the reversal of fibrosis. Defects in relaxin and relaxin receptors are increasingly implicated as a cause of fibrosis which is associated with many disease processes. This study will examine the molecular mechanisms linking relaxin and fibrosis and will determine whether relaxin can be used to reverse the condition.
The comparative physiology of oxygen delivery to the kidney. The kidney is in danger of hyperoxia because the kidney receives so much blood relative to its mass. It is proposed that shunting oxygen between arteries and veins substantially mitigates the risk of hyperoxia, but under certain circumstances shunting substantially increases the risk of kidney hypoxia. Using a combination of synchrotron and histological imaging, This project will carefully define the three-dimensional vasculature of th ....The comparative physiology of oxygen delivery to the kidney. The kidney is in danger of hyperoxia because the kidney receives so much blood relative to its mass. It is proposed that shunting oxygen between arteries and veins substantially mitigates the risk of hyperoxia, but under certain circumstances shunting substantially increases the risk of kidney hypoxia. Using a combination of synchrotron and histological imaging, This project will carefully define the three-dimensional vasculature of the renal cortex in several different species and interpret its functional significance using computational modeling. The outcome of this project will be a new understanding in the comparative physiology of oxygen transport and shunting in the kidney.Read moreRead less
SKELETAL MUSCLE: REVERSIBLE TEMEPERATURE-INDUCED UNCOUPLING OF CONTRACTION FROM THE ACTIVATOR Ca2+ AND TUBULAR SYSTEM ROLES IN MUSCLE FUNCTION REGULATION. Skeletal muscles represent the largest organ in the body of vertebrates and are responsible for major functions including maintaining posture and locomotion. Skeletal muscles are also a major source of heat production. The project focuses on temperature-induced effects on the ability of the skeletal muscle to contract in warm blooded animals, ....SKELETAL MUSCLE: REVERSIBLE TEMEPERATURE-INDUCED UNCOUPLING OF CONTRACTION FROM THE ACTIVATOR Ca2+ AND TUBULAR SYSTEM ROLES IN MUSCLE FUNCTION REGULATION. Skeletal muscles represent the largest organ in the body of vertebrates and are responsible for major functions including maintaining posture and locomotion. Skeletal muscles are also a major source of heat production. The project focuses on temperature-induced effects on the ability of the skeletal muscle to contract in warm blooded animals, including marsupials, and on the complex roles played by a cellular structure unique to the muscle fibre, the tubular system, with respect to regulation of muscle function at physiological temperatures. The project will test hypotheses that will have far-reaching implications for muscle physiology, cell biology and evolutionary biology.Read moreRead less
Discovering the role of pH in regulating mitochondrial biogenesis, so as to improve the design of preventative programs aimed at healthy ageing. Mitochondria are essential for life, and maintaining mitochondrial function plays an important role in preventing the progression of many age-related diseases. It has previously been shown that minimising the decrease in muscle pH that occurs during physical activity promotes greater improvements in mitochondrial function. The next step is to discover t ....Discovering the role of pH in regulating mitochondrial biogenesis, so as to improve the design of preventative programs aimed at healthy ageing. Mitochondria are essential for life, and maintaining mitochondrial function plays an important role in preventing the progression of many age-related diseases. It has previously been shown that minimising the decrease in muscle pH that occurs during physical activity promotes greater improvements in mitochondrial function. The next step is to discover the effects of altering pH on acute and chronic activity-induced changes in signalling proteins and genes that are involved in the regulation of skeletal muscle mitochondrial biogenesis. These experiments will significantly advance the knowledge base concerning factors regulating mitochondrial biogenesis, and will contribute to optimising the design of preventative programs aimed at healthy aging.Read moreRead less