Hypoxia-induced Suppression Of Respiratory Sensations And Reflexes
Funder
National Health and Medical Research Council
Funding Amount
$276,750.00
Summary
Many diseases that effect the respiratory system have their primary effect on the lungs and airway themselves but in some conditions, such as obstructive sleep apnea (OSA) and asthma, increased breathing load can induce periods of low blood oxygen which could further contribute to morbidity in these diseases. OSA is a disorder associated with snoring. Patients experience periods of sleep fragmentation and oxygen deprivation due to obstruction of the floppy portion of the upper airway (pharynx) d ....Many diseases that effect the respiratory system have their primary effect on the lungs and airway themselves but in some conditions, such as obstructive sleep apnea (OSA) and asthma, increased breathing load can induce periods of low blood oxygen which could further contribute to morbidity in these diseases. OSA is a disorder associated with snoring. Patients experience periods of sleep fragmentation and oxygen deprivation due to obstruction of the floppy portion of the upper airway (pharynx) during sleep. It affects 4% of men and 2% of women and causes excessive daytime sleepiness leading to increased risk of accidents, high blood pressure and premature cardiovascular disease. Asthma produces airway inflamation and narrowing and affects a wide range of people. Both OSA and asthma are associated with episodes of impaired breathing and reduced levels of oxygen in the blood. Low levels of oxygen in the blood (hypoxia) is well known to impair functioning of the central nervous system. We have recently found that hypoxia blunts sensations of increased breathing load in healthy people and in asthmatics. Hypoxia might therefore contribute to worsening of attacks in these diseases. This study aims to investigate how changes in blood oxygen levels affect brain processing of respiratory signals, how this translates to perception of sensations and the physiological adaptations that people make to cope with increased breathing load. We will also investigate whether the inhibitory effects of hypoxia on central nervous system function extend to other vital protective respiratory reflexes such as cough, awakening from sleep to increased breathing load and upper airway reflexes that are important for maintaining an open airway.Read moreRead less
Role Of Zinc In The Respiratory Epithelium And Asthma
Funder
National Health and Medical Research Council
Funding Amount
$224,250.00
Summary
This project will use a panel of Zinquin-derived Zn fluorophores developed in our laboratory, as well as probes for the mammalian family of vesicular ZnT transporters, to carry out a study of the normal physiology of Zn in the respiratory system and potential abnormalities of this in patients with chronic inflammatory respiratory disease (asthma, COPD, chronic smoking). Chronic inflammatory diseases of the respiratory tract affect a significant proportion of the Australian community. For example ....This project will use a panel of Zinquin-derived Zn fluorophores developed in our laboratory, as well as probes for the mammalian family of vesicular ZnT transporters, to carry out a study of the normal physiology of Zn in the respiratory system and potential abnormalities of this in patients with chronic inflammatory respiratory disease (asthma, COPD, chronic smoking). Chronic inflammatory diseases of the respiratory tract affect a significant proportion of the Australian community. For example, asthma affects 12% of adults and amongst these, 15% waken weekly or more often with their asthma while 6% are hospitalized annually. There is a need to understand the basic mechanisms underlying these diseases so that new strategies can be developed to modify bronchocondtriction and inflammation. The project will provide new knowledge concerning the physiology of Zn in the respiratory epithelium and interactions between Zn deficiency and oxidants on injury in the respiratory tract. The usefulness of easily accessible nasal epithelial cells as a measure of Zn and Zn transporter levels deeper in the respiratory tract will be assessed. The project encompasses a number of fields and utilizes in vitro cellular and animal models, as well as tissues from human subjects.Read moreRead less
Use of heart rate kinetics during the rest-exercise transition for tracking changes in exercise performance in athletes. The project aims to develop an objective method for assessing fatigue and recovery in athletes during changes in training load. It is intended that this will inform training adjustments to optimise performance and reduce the risk of overtraining and injury. The method assesses the maximal rate of heart rate increase at the start of light exercise (rHRI), and has been shown in ....Use of heart rate kinetics during the rest-exercise transition for tracking changes in exercise performance in athletes. The project aims to develop an objective method for assessing fatigue and recovery in athletes during changes in training load. It is intended that this will inform training adjustments to optimise performance and reduce the risk of overtraining and injury. The method assesses the maximal rate of heart rate increase at the start of light exercise (rHRI), and has been shown in the project team’s early studies to track reductions in exercise performance when an athlete is fatigued from increased training. The project aims to now refine rHRI so it can also track improvements in exercise performance as athletes recover, and to evaluate rHRI in multiple sports and genders. A field test will be developed and mechanisms that allow it to track changes in exercise performance will be investigated.Read moreRead less
Airway Epithelial IAPs And Their Interaction With Zn Ions
Funder
National Health and Medical Research Council
Funding Amount
$260,779.00
Summary
The air we breathe contains a variety of harmful substances. Damage to the lining involves death of the ciliated cells that line the airways. We have shown that zinc protects these cells from premature death. This application focuses on a family of proteins called IAPs which bind zinc and regulate cell death in other tissues. This project focusses on how the IAPs and Zn may act together to mainitain healthy airways and how abnormalities of these may occur in people with asthma.
Common synaptic inputs to human upper airway muscles. Changes in the activity of upper airway muscles at sleep onset contribute to the development of Obstructive Sleep Apnoea. The aim of this project is to investigate how the brain controls upper airway muscles during wakefulness and sleep and to identify the pathological processes that lead to the development of Obstructive Sleep Apnoea.
An investigation into performance characteristics of elite male and female soccer players in training and competition environments. The aim of the project is to identify critical determinants of soccer performance that will improve preparation of Australian teams for international competition. Three studies are proposed. Study One will utilize a decade of physical performance and anthropometric data on male and female soccer players at the Australian Institute of Sport to identify physical perfo ....An investigation into performance characteristics of elite male and female soccer players in training and competition environments. The aim of the project is to identify critical determinants of soccer performance that will improve preparation of Australian teams for international competition. Three studies are proposed. Study One will utilize a decade of physical performance and anthropometric data on male and female soccer players at the Australian Institute of Sport to identify physical performance standards characteristic of elite players. Study Two will comprise match analyses to delineate crucial physical, technical and tactical aspects of individual and team performance. Study three will identify characteristics specific to elite goalkeepers that may be used for monitoring responses to training and competition.Read moreRead less
Social Impact and Connection Outcomes Associated with Community Sport. Outcomes of social connection from community sport are widely touted and supported to exist. However, we know little about how social infrastructure actually delivers these benefits. It is difficult to understand and develop practices that organisations can use to maximise the outcomes of sport participation. This research aims to investigate how social infrastructure delivers social connection outcomes associated with commun ....Social Impact and Connection Outcomes Associated with Community Sport. Outcomes of social connection from community sport are widely touted and supported to exist. However, we know little about how social infrastructure actually delivers these benefits. It is difficult to understand and develop practices that organisations can use to maximise the outcomes of sport participation. This research aims to investigate how social infrastructure delivers social connection outcomes associated with community sport. Expected outcomes include novel practice based tools and guidance for community groups to enhance social connection outcomes and new understanding about the role of social infrastructure in enhancing community connection. Improved social connection is expected to improve resilience and community wellbeing.
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Effectiveness of Intervention Strategies to Promote Physical Activity Among Insufficiently Active Adults. This project will determine the cost-effectiveness of 2 types of physical activity (PA) interventions based around the workplace. 480 participants will be randomly assigned to PA intervention groups or controls. Interventions are either a (1) self-regulated, pedometer-based program or a (2) semi-structured, 40-day initiation to more moderately-vigorous PA. Both are designed to increase self- ....Effectiveness of Intervention Strategies to Promote Physical Activity Among Insufficiently Active Adults. This project will determine the cost-effectiveness of 2 types of physical activity (PA) interventions based around the workplace. 480 participants will be randomly assigned to PA intervention groups or controls. Interventions are either a (1) self-regulated, pedometer-based program or a (2) semi-structured, 40-day initiation to more moderately-vigorous PA. Both are designed to increase self-efficacy and impact on positive PA behaviours. Long-term, behavioural change and job-related outcomes will be evaluated by following participants for 12 months after the interventions.Read moreRead less
From The Synchrotron To The Clinic: Translation Of A Novel Functional Lung Imaging Technology
Funder
National Health and Medical Research Council
Funding Amount
$891,834.00
Summary
Our team has recently developed a synchrotron technology with a startling capacity for dynamic functional imaging that can act as a sensitive regional indicator of lung disease. We will demonstrate that this technology can be translated from the synchrotron to the lab and eventually the clinic. We will provide proof of this concept by the application of this technology to emphysema, asthma, lung cancer, cystic fibrosis lung disease and neonatal resuscitation.
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