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Mechanisms Underlying Acute Changes In Lung Function And Airway Responsiveness Following Respiratory Viral Infections
Funder
National Health and Medical Research Council
Funding Amount
$444,878.00
Summary
This study will investigate the mechanisms responsible for the increased airway responsiveness seen during respiratory viral infections to the common viruses of influenza (flu) and respiratory syncytial virus (RSV). Respiratory viral infections alter lung function and increase airway responsiveness in man. In addition, respiratory viral infections early in life are a risk factor for the subsequent development of asthma. The mechanisms responsible for this are unknown. Both the infecting virus an ....This study will investigate the mechanisms responsible for the increased airway responsiveness seen during respiratory viral infections to the common viruses of influenza (flu) and respiratory syncytial virus (RSV). Respiratory viral infections alter lung function and increase airway responsiveness in man. In addition, respiratory viral infections early in life are a risk factor for the subsequent development of asthma. The mechanisms responsible for this are unknown. Both the infecting virus and host factors, such as age of infection, gender and genetic predisposition, are likely to be important. OUTCOMES and SIGNIFICANCE: These studies will provide a comprehensive assessment of the effects of acute viral respiratory infections on lung function and airway responsiveness using cutting edge techniques developed in our labs. The results will provide new insights into how these infections cause lung disease and may provide clues for new approaches to prevent the adverse effects of these common respiratory viral infections.Read moreRead less
Neurons and neurotransmitters that control the apnoeic response to irritation of the larynx. Normal function of the larynx enables breathing, cough, singing, speech and many other normal functions. This project will reveal how nerves in the brain coordinate to achieve these many functions; in particular the way that breathing stops if fluid or smoke enters the larynx.
Central command neurons integrating cardiorespiratory drive in exercise. The ability to perform exercise is fundamental to human health and welfare. This ability depends upon the co-ordination by the brain of respiratory and cardiovascular function, such that the delivery of oxygen to exercising muscles is maximised. This project will test the idea that there is a specific group of neurons in the brain that drive both the respiratory and cardiovascular changes that occur during exercise, and w ....Central command neurons integrating cardiorespiratory drive in exercise. The ability to perform exercise is fundamental to human health and welfare. This ability depends upon the co-ordination by the brain of respiratory and cardiovascular function, such that the delivery of oxygen to exercising muscles is maximised. This project will test the idea that there is a specific group of neurons in the brain that drive both the respiratory and cardiovascular changes that occur during exercise, and will determine the location and functions of such neurons. Such new knowledge will help us understand how the brain optimises the ability of the body to perform exercise. This is of fundamental importance in sports science, a field in which Australia excels.Read moreRead less
Neural Control Of Human Respiratory Muscles In Health And Disease
Funder
National Health and Medical Research Council
Funding Amount
$450,132.00
Summary
This research examines how human inspiratory muscles that ‘pump’ air into the lungs are controlled in health and disease. We will study the interaction between automatic and voluntary control of breathing, about which very little is known. The control of breathing in patients who breathe against an inspiratory load (eg. asthma) and mechanically ventilated patients will be a focus of this research. Outcomes include better understanding of the control of breathing and improved patient care.
A new paradigm for surfactant composition and function - how do lungs cope with stress? Our research will increase the understanding of the scope of change and precise molecular interactions occurring in the surfactant lipids and proteins of animals under physiological stress. The novel insights will improve the treatment of lung diseases (such as chronic obstructive pulmonary disease and acute lung injury). We have formed a team of international surfactant researchers all experts in state-of-th ....A new paradigm for surfactant composition and function - how do lungs cope with stress? Our research will increase the understanding of the scope of change and precise molecular interactions occurring in the surfactant lipids and proteins of animals under physiological stress. The novel insights will improve the treatment of lung diseases (such as chronic obstructive pulmonary disease and acute lung injury). We have formed a team of international surfactant researchers all experts in state-of-the-art chemical and biophysical technologies relating to surfactant. These collaborations will bring new technological applications to Australia and provide outstanding cross-disciplinary training for postgraduate students and research staff at the interface between animal physiology, biophysical chemistry and respiratory medicine.Read moreRead less
Novel kinases: How do they regulate epithelial ion transport, and what is their role in epithelial function? The project will produce the knowledge of fundamental physiology that will lead to novel approaches for treating respiratory and gastrointestinal infections and cystic fibrosis, as well as for the accumulation of fluid in the lungs and abdomen that accompany many advanced malignancies. It thus has the potential to have a significant economic and social impact in Australia and internation ....Novel kinases: How do they regulate epithelial ion transport, and what is their role in epithelial function? The project will produce the knowledge of fundamental physiology that will lead to novel approaches for treating respiratory and gastrointestinal infections and cystic fibrosis, as well as for the accumulation of fluid in the lungs and abdomen that accompany many advanced malignancies. It thus has the potential to have a significant economic and social impact in Australia and internationally. Furthermore, it will provide advanced training in research methods to Australian scientists, equipping them to undertake challenging and interesting positions in the medical and life sciences and beyond.Read moreRead less
Assessing a model of the physiological changes at arousal from sleep. Arousals from sleep are common in the elderly and have adverse consequences. This project will investigate a model of the changes in bodily processes (muscle, brain and cardiovascular activation) that occur when humans awaken from sleep.
Optimising bubble continuous positive airway pressure (CPAP) for preterm infants. Synchrotron imaging will be used to see how the lungs of newborns are aerated and move when they are supported by continuous positive airway pressure (CPAP) breathing support. This project will provide fundamental biological information that will contribute to refinement of devices to support breathing in babies.
Allergen-sensitzation And Environmental Exposures In Early Life Interact Synergistically To Alter Lung Growth
Funder
National Health and Medical Research Council
Funding Amount
$425,088.00
Summary
Asthma develops as the result of complex interactions between genetic susceptibilities and environmental exposures. Approximately 40% of 6-year-old children in Perth are sensitized to inhaled allergens, however, only half of these have asthma. Allergic sensitization per se is therefore insufficient for the development of persistent asthma. A second hit, associated with lung inflammation in early life, increases this risk several fold. This second hit could come from viral infection or from other ....Asthma develops as the result of complex interactions between genetic susceptibilities and environmental exposures. Approximately 40% of 6-year-old children in Perth are sensitized to inhaled allergens, however, only half of these have asthma. Allergic sensitization per se is therefore insufficient for the development of persistent asthma. A second hit, associated with lung inflammation in early life, increases this risk several fold. This second hit could come from viral infection or from other inflammatory stimuli such as exposure to cigarette smoke, air pollutants and vehicle exhaust emissions. The timing of this second hit may well be important, particularly if it is early while the lungs are still growing and developing. The aim of this project is to examine interactions between allergen sensitization and exposure to environmental hazards in early life using a mouse model of allergic inflammation. We will test the hypothesis that the combination of allergic sensitization and viral infections in early life alter lung growth, airway function and airway hyperresponsiveness, however, exposure to air pollutants can not provide the 'second hit required to induce persistent asthma. Determining the role viral infection and environmental pollution have early in life may provide us with a strategy for intervention that could prevent life-long changes in respiratory function and airway hyperresponsiveness.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE130100035
Funder
Australian Research Council
Funding Amount
$300,000.00
Summary
Hyperpolarised gas functional lung and molecular imaging. This project will produce a polariser to generate magnetised gas for research with magnetic resonance imaging (MRI). This allows imaging of normal and abnormal lung ventilation and circulation in animal and humans. The use of these hyperpolarised gases can also be used to tag specific molecules and increase understanding of lung metabolism.