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Asthma is a major health problem for the Australian community. Recent studies have shown increasing numbers of people of all ages are developing asthma. Despite extensive asthma research and the development of new asthma drugs, asthma remains a leading cause of ill- health, especially in children. In many cases the deterioration in asthma symptoms is related to a cold or flu like illness, Viruses are the leading cause of these infections and are known to make asthma symptoms worse. How they do t ....Asthma is a major health problem for the Australian community. Recent studies have shown increasing numbers of people of all ages are developing asthma. Despite extensive asthma research and the development of new asthma drugs, asthma remains a leading cause of ill- health, especially in children. In many cases the deterioration in asthma symptoms is related to a cold or flu like illness, Viruses are the leading cause of these infections and are known to make asthma symptoms worse. How they do this is not completely understood. Asthma causes a unique type of inflammation in the airways, which is present in even mild asthma and can be controlled by medication. Viruses also cause inflammation by infecting the lungs. Viruses can cause severe attacks of asthma even when asthma appears controlled on medication. The ways in which virus infections do this, are not established. By understanding how this happens we may be able to design effective treatment for this problem. Our initial results indicate that virus induced asthma is different to asthma that is triggered by allergens. We plan to investigate what effect certain viruses have on the lungs of people with asthma by measuring cells and chemicals that are present in sputum. We will use recently developed technologies to accurately see what viruses are infecting these people, and then evaluate the role of treatment of virus induced asthma. This study will shed important light on potential causes of unstable asthma and the role that viral infection plays in this. It may also lead to new opportunities to develop treatments that are more effective in preventing and controlling asthma.Read moreRead less
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
Pneumovirus Infection In Infancy Affects The Development Of Life-long Adaptive Immunity.
Funder
National Health and Medical Research Council
Funding Amount
$408,469.00
Summary
Respiratory syncytial virus is the most important cause of acute lower respiratory tract infection (RTI) in young children worldwide. Hospital admission rates in Western societies for RTIs are around 3% for children younger than 1 year. A vaccine to RSV is not yet available and repeat infections occur thoughout life, suggesting that the immune response does not develop correctly. In this project we are exploring the mechanisms that underpin disease development and promote incomplete immunity.
Viral Infection And Exacerbations Of Asthma During Pregnancy: Characteristics, Mechanisms And Consequences
Funder
National Health and Medical Research Council
Funding Amount
$465,210.00
Summary
At least 12% of pregnant women in Australia have asthma and more than half of these women will experience an acute attack during pregnancy. This puts the fetus at risk of poor outcomes such as low birth weight or premature birth, which has a significant impact on their health in both the short term and long term. The mechanisms which lead to exacerbations of asthma during pregnancy are unknown, but have implications for the treatment of pregnant women with asthma. In non-pregnant adults, the maj ....At least 12% of pregnant women in Australia have asthma and more than half of these women will experience an acute attack during pregnancy. This puts the fetus at risk of poor outcomes such as low birth weight or premature birth, which has a significant impact on their health in both the short term and long term. The mechanisms which lead to exacerbations of asthma during pregnancy are unknown, but have implications for the treatment of pregnant women with asthma. In non-pregnant adults, the majority of asthma exacerbations are caused by viral infection and it is likely that a similar mechanism operates in pregnant women with asthma. No previous studies have identified the viruses responsible for exacerbations of asthma during pregnancy. We currently have a promising lead in this area, with data showing that one third of pregnant women with asthma have a severe exacerbation of their asthma requiring medical intervention during pregnancy, and a large proportion of these are likely to be due to viral infection. We propose that during pregnancy, pregnant women with asthma are more susceptible to viral infection than pregnant women without asthma. We also suggest that women with asthma will have more severe viral infections during pregnancy, and that these will contribute to the majority of acute asthma attacks during pregnancy. This project will determine the rate of infection among pregnant women with and without asthma and determine the viruses responsible for acute attacks of asthma during pregnancy. The study will also explore the inflammatory mechanisms which predispose women to viral infection. These results will contribute to a greater understanding of the mechanisms leading to exacerbations of asthma during pregnancy and will be used to develop more appropriate asthma monitoring and treatment strategies for pregnant women, which will have health benefits for both mother and baby.Read moreRead less
Exploring The Role Of Respiratory Virus Infections In Childhood Asthma Exacerbations
Funder
National Health and Medical Research Council
Funding Amount
$596,649.00
Summary
The PEAK study will explore the reasons children get worse asthma symptoms when they get colds. These reasons examined include the asthma medications taken (or not taken), allergies and exposure to allergens and the type of virus involved. The study follows the children over the whole school term and uses a new way to sample virus by collecting it in the breath, this is more comfortable than old methods and can be done at home.
Functional Significance Of Subcellular Localisation Of Viral 3C Protease In Rhinovirus Pathogenesis
Funder
National Health and Medical Research Council
Funding Amount
$613,513.00
Summary
Rhinovirus (RV) infections are the major cause of virus induced asthma attacks and common colds, causing significant morbidity and mortality. The incidence of asthma is increasing worldwide with new strategies urgently needed to reduce RV-associated disease. We have observed RV 3C protease in the nuclear compartment of infected host cells and propose to determine its significance in RV pathogenesis with relevance to asthma therapies.
Lung infections are the most frequent triggers of asthma exacerbations. While different infections cause exacerbations by they all result in the same type of lung inflammation. Using novel disease models, we have identified key molecules involved in a range of viral and bacterial induced asthma exacerbations. We will define these shared pathways that link viral and bacterial-mediated asthma exacerbations, thus these studies will pave the way for the development of unified treatments.
I am a respiratory physician studying mechanisms of respiratory allergy and host defence against respiratory viruses. My research aims to develop new ways of treating airway inflammation in asthma and COPD.