Understanding The Acute And Cumulative Metabolic Effects Of Prolonged Sitting In Adults
Funder
National Health and Medical Research Council
Funding Amount
$416,597.00
Summary
Sedentary behaviour (sitting time) has been linked to an increased risk of chronic illnesses, including type 2 diabetes and obesity, but recent evidence suggests that light-intensity activity (non-exercise activities of daily living) is associated with reduced risk. These studies will examine whether breaking up sitting time with frequent short periods of activity can overcome the negative effects of prolonged sitting on blood glucose and blood fats in overweight older adults.
Randomised Double-blind Placebo-controlled Trial Of Aspirin In Primary Prevention Of CVD Events Or Dementia In The Aged.
Funder
National Health and Medical Research Council
Funding Amount
$3,532,500.00
Summary
The single most important risk factor for cardiovascular disease is age. All men aged 75 years have a 10-15% risk of having a stroke or heart attack in the next 5 years. Low dose aspirin has been shown to prevent further strokes and heart attacks in people who have already had one. It has been also shown to protect people who have not had a heart attack or stroke but who are at increased risk. Given that the elderly are at increased risk why do we need to do a trial in this particular group? The ....The single most important risk factor for cardiovascular disease is age. All men aged 75 years have a 10-15% risk of having a stroke or heart attack in the next 5 years. Low dose aspirin has been shown to prevent further strokes and heart attacks in people who have already had one. It has been also shown to protect people who have not had a heart attack or stroke but who are at increased risk. Given that the elderly are at increased risk why do we need to do a trial in this particular group? The reason is that relatively few elderly patients were included in the previous prevention trials. Also while the elderly may have the most to gain from treatment, they also have the most to lose because they are more likely to suffer from side-effects. Aspirin prevents heart attacks by stopping clots forming in blood vessels. This also means that people taking it have an increased tendency to bleed. Thus though it may prevent strokes due to clots it may also increase the risk of strokes caused by bleeding. Bleeding from the gut is another major problem as aspirin tends to erode the lining of the stomach. Minor bleeding from the gut can also lower blood oxygen carrying capacity which may exacerbate other diseases associated with ageing, e.g. heart failure. Dementia may be caused by repeated clots in small or large vessels. Dementia is a particular problem in the elderly affecting 10% of 85 year olds. It is a major cause of loss of quality of life and a significant cost to the community. Aspirin may reduce the progression of such a disease leading to a maintained quality of life (QOL) for individuals and their families. As our age increases our years of life remaining decreases. This is self-evident. Thus the potential to add years to life reduces and the potential of diseases to adversely affect quality of life becomes more important. Thus it may be more important to prevent a nonfatal stroke that leads to institutionalisation than a fatal stroke. Hence QOL will be assessed.Read moreRead less
Ventilation Heterogeneity And Airway Remodelling In Asthma
Funder
National Health and Medical Research Council
Funding Amount
$522,586.00
Summary
Asthma is a common and important as a cause of significant symptoms and even death. Associated with asthma is narrowing and stiffening of the arways which causes uneven ventilation of the lungs and reduced lung function. We have developed a new technique of imaging the lungs, as well as new lung function tests which measure uneven ventilation and stiffening of airways. This will help us design better medications, and help predict those who are at risk or severe asthma and death.
Finding The Genetic Causes Of Asthma: The Australian Asthma Genetics Consortium (AAGC)
Funder
National Health and Medical Research Council
Funding Amount
$1,697,639.00
Summary
Asthma is a major burden on individuals and health systems. Despite many decades of research, no major effective new treatments for asthma have emerged recently. We will establish a large international consortium to systematically test nearly all known human genes to identify those that influence asthma susceptibility. We expect to identify pathways not previously implicated in asthma and so lead to a potential breakthrough in the development of more effective treatments.
A Study Of The Molecular Epidemiology And Virulence Determinants Of Enterovirus 71 Strains From The Asia-Pacific Region
Funder
National Health and Medical Research Council
Funding Amount
$286,325.00
Summary
In this study, we aim to understand the reasons for the emergence of epidemics of severe neurological disease due to enterovirus 71 (EV71) in young children of the Asia-Pacific region since 1997, and to develop strategies for disease prevention. EV71 is a human enterovirus closely related to the polioviruses. Most infections with EV71 are trivial, however, they may occasionally result in severe disease, including brainstem encephalitis with a high mortality and acute flaccid paralysis similar to ....In this study, we aim to understand the reasons for the emergence of epidemics of severe neurological disease due to enterovirus 71 (EV71) in young children of the Asia-Pacific region since 1997, and to develop strategies for disease prevention. EV71 is a human enterovirus closely related to the polioviruses. Most infections with EV71 are trivial, however, they may occasionally result in severe disease, including brainstem encephalitis with a high mortality and acute flaccid paralysis similar to poliomyelitis. There has been a large increase in EV71 epidemic activity throughout the Asia-Pacific region since 1997, including a large epidemic in Perth, Western Australia in 1999. These epidemics have resulted in many deaths and cases of severe neurological disability. In view of the severity of EV71 neurological disease and the lack of effective treatments, our research effort needs to focus on prevention through public health surveillance and vaccine development. The major aims of our study are two-fold: 1. To study the origin and evolution of EV71 in the Asia-Pacific region using molecular techniques and to use this information to implement surveillance in Australia and Southeast Asia. It is anticipated that improved surveillance will provide early warning of impending epidemics. 2. To understand the molecular basis of virulence of EV71, with emphasis on the ability of virus to cause severe disease of the central nervous system. This study will have two goals: a. To identify the human cellular receptor of EV71. The ultimate goal of this research will be the development of a small animal model of EV71 encephalitis by constructing a transgenic mouse expressing the human cellular receptor for EV71. b. To construct an infectious cDNA clone of EV71 and to develop genetically defined attenuated strains by mutagenesis of the infectious clone. Mutant strains of EV71 will be tested for replication and virulence in newborn mice and in human neuroblastoma cells.Read moreRead less
A Population-based Family Study Of Filaggrin Mutations And Allergic Disease Risk In Australia
Funder
National Health and Medical Research Council
Funding Amount
$308,584.00
Summary
It is biologically plausible that the association of known environmental risk factors for asthma may be different for genetically susceptible individuals. Few studies have examined the interaction between genetic and environmental factors. that have not considered genetic susceptibility are estimating an average risk of asthma across all genotypes in the population which may not be relevant for a particular sub-group.
Antimalarial Drugs In Pregnancy: Preclinical And Clinical Studies Of Conventional And Novel Agents
Funder
National Health and Medical Research Council
Funding Amount
$470,115.00
Summary
Women in malaria-endemic areas such as coastal PNG are at high risk of malaria in pregnancy. To prevent the substantially increased malaria-associated morbidity and mortality in mother and child, and because even asymptomatic infections can be deleterious, there has been a move to giving antimalarial drugs regularly during pregnancy regardless of the mother's clinical or parasitological status. In poor tropical countries, such treatment usually comprises safe and inexpensive agents such as chlor ....Women in malaria-endemic areas such as coastal PNG are at high risk of malaria in pregnancy. To prevent the substantially increased malaria-associated morbidity and mortality in mother and child, and because even asymptomatic infections can be deleterious, there has been a move to giving antimalarial drugs regularly during pregnancy regardless of the mother's clinical or parasitological status. In poor tropical countries, such treatment usually comprises safe and inexpensive agents such as chloroquine and Fansidar. There are two main issues with this approach. First, the efficacy of such conventional agents is waning and this increases the risk of break-through malaria. Second, there are few data on how the drugs are handled in pregnancy on which to base recommendations for treatment. We plan to collect information on the disposition and effectiveness of chloroquine and Fansidar in women with malaria in pregnancy in PNG that should allow a critical appraisal of the usefulness of current regimens in PNG and in other tropical countries where parasite resistance to these agents is emerging. Artemisinin combination therapy (ACT) in the form of a novel artemisinin drug and a longer-acting partner has been suggested as the most promising alternative therapy for malaria in pregnancy if conventional drugs fail. We plan to assess the safety of a leading ACT formulation, namely dihydroartemisinin and the chloroquine-like drug piperaquine (DHA-PQ), in animals before extending our studies to women with malaria in PNG. These latter studies will allow an evaluation of the safety and efficacy of DHA-PQ as novel therapy for malaria in pregnancy in PNG and other tropical countries.Read moreRead less
Evaluation Of The Efficacy Of The Australian Mammographic Screening Program
Funder
National Health and Medical Research Council
Funding Amount
$504,096.00
Summary
BreastScreen Australia uses interim measures such as participation, small cancer detection and interval cancer rates to monitor the impact of the program on mortality. Using BreastScreen Victoria as a case study, we will estimate the direct impact of the program on mortality for screened women, addressing Cancer Australia's priority of 'Improving screening program outcomes to ensure that patients can be identified and treated appropriately and ensuring that screening services are effective'.
Assessing Sustainability Of Positive Outcomes In A Successful Child Obesity Prevention Intervention: Follow-up Of The Melbourne InFANT Program
Funder
National Health and Medical Research Council
Funding Amount
$882,700.00
Summary
Early intervention may be the most sustainable and effective means of preventing obesity and promoting healthy lifestyle behaviours (obesity preventive behaviours) including diet, physical activity and reduced sedentary behaviours. This project aims to assess whether differences observed between intervention and control groups at the conclusion of a successful obesity prevention program, the Melbourne InFANT Program, (child aged 18-months) are maintained across the important early childhood year ....Early intervention may be the most sustainable and effective means of preventing obesity and promoting healthy lifestyle behaviours (obesity preventive behaviours) including diet, physical activity and reduced sedentary behaviours. This project aims to assess whether differences observed between intervention and control groups at the conclusion of a successful obesity prevention program, the Melbourne InFANT Program, (child aged 18-months) are maintained across the important early childhood years, to 3.5 and 5 years of age.Read moreRead less
The Impact Of Outdoor Aeroallergen Exposure On Asthma Exacerbations In Children And Adolescents
Funder
National Health and Medical Research Council
Funding Amount
$473,924.00
Summary
Asthma is a chronic condition usually diagnosed in childhood and an important public health concern. We do not fully understand what triggers an asthma attack, although outdoor pollen and moulds may be important. This project will establish the relative importance of pollen and moulds in triggering asthma attacks among Australian children. It will fill gaps in our knowledge of environmental triggers of asthma. Such knowledge will improve asthma management and ultimately public health.