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Predicting The Successful Resolution Of Obstructive Sleep Apnoea Following Weight-loss Surgery
Funder
National Health and Medical Research Council
Funding Amount
$729,284.00
Summary
The current project aims to determine how obesity causes obstructive sleep apnoea (OSA), a disorder associated with significant cardiovascular morbidity & mortality. This research is a burgeoning area given that obesity is one of the western world’s leading health care concerns. Our findings may ultimately offer a refinement of weight-loss interventions to maximise their effects on OSA as well as offering novel treatment strategies in the management of this disorder that is desperately needed.
Modafinil For Neurobehavioural Dysfunction In Sleep Apnea Patients Who Cannot Use Standard Device-based Treatments.
Funder
National Health and Medical Research Council
Funding Amount
$505,830.00
Summary
Obstructive sleep apnea (OSA) is often caused by obesity and can result in fall-asleep car crashes. It is often treated by mechanical devices that keep the sleeping airway open. Unfortunately, around half of all patients cannot tolerate these treatments. We propose to help patients reduce obesity with a lifestyle intervention program whilst testing whether their daytime symptoms of sleepiness and poor driving ability can be treated with a wake-promoting drug called modafinil.
Restoring Skeletal Muscle In An Experimental Model Of COPD By Targeting The IGF-1-myostatin-macrophage Axis
Funder
National Health and Medical Research Council
Funding Amount
$508,183.00
Summary
Most people think that the serious disabilities of COPD (emphysema) patients follows damage to their lungs but wasted muscles may be even more important. We can not regrow lung but we have found a way that might help regrow muscle. We plan to use stem cells to make one of the body's own cells called 'macrophages' and genetically engineer these cells to help deliver healing proteins directly into the muscle. Making muscle stronger will help COPD patients live longer and improve quality of life.
Molecular Mechanisms Of Wasting In Experimental COPD
Funder
National Health and Medical Research Council
Funding Amount
$389,521.00
Summary
Chronic obstructive pulmonary disease (COPD) is a major global health problem and has been predicted to become the third largest cause of death in the world by 2020. Cigarette smoking is the major cause of COPD and accounts for more than 95% of cases in industrialized countries. Currently no therapies exist to halt the inevitable progression of the disease. To date most of the research has focused on the aspects of this disease which result in destruction of the lung however it is becoming incre ....Chronic obstructive pulmonary disease (COPD) is a major global health problem and has been predicted to become the third largest cause of death in the world by 2020. Cigarette smoking is the major cause of COPD and accounts for more than 95% of cases in industrialized countries. Currently no therapies exist to halt the inevitable progression of the disease. To date most of the research has focused on the aspects of this disease which result in destruction of the lung however it is becoming increasingly evident that COPD is a disease of multiple organs. Until recently it had been widely believed that the profound loss of exercise tolerance observed in COPD patients was due to impaired gas exchange secondary to lung structural damage. Loss of lean body mass (muscle) is now recognised as a major co-morbidity of COPD and a direct cause of functional impairment with patients suffering marked deteriorations in quality of life, increased mortality, breathlessness and decreased exercise tolerance. Skeletal muscle wasting is a powerful predictor of mortality in COPD, independent of the lung function impairment. Despite the clinical seriousness of muscle wasting and suggestive evidence that it may be reversible, little is known about the pathogenic mechanisms. Therefore the goal of this project is to use experimental models of COPD to identify the molecular basis of wasting, in order to restore skeletal muscle homeostasis. The insights gained from this research proposal may lead to the identification of potentially novel targets for the prevention and reversal of the debilitating and life threatening effects of skeletal muscle wasting in COPD. For the COPD patient this has the potential to increase quality of life, functional ability and life expectancy.Read moreRead less
High Field Magnetic Resonance Evaluation Of Cerebral And Brainstem Dysfunction In Obstructive Sleep Apnea.
Funder
National Health and Medical Research Council
Funding Amount
$335,175.00
Summary
BACKGROUND: Obstructive Sleep Apnea (OSA) is a condition where repetitive obstruction of the upper airway occurs during sleep. This occurs in susceptible patients when the muscles which normally hold the upper airway open relax with sleep onset. During these interruptions to breathing (apneas) oxygen levels can fall significantly and repetitive awakenings from sleep result. Patients with sleep apnea are often sleepy during the day and experience difficulties with concentration on complex or bori ....BACKGROUND: Obstructive Sleep Apnea (OSA) is a condition where repetitive obstruction of the upper airway occurs during sleep. This occurs in susceptible patients when the muscles which normally hold the upper airway open relax with sleep onset. During these interruptions to breathing (apneas) oxygen levels can fall significantly and repetitive awakenings from sleep result. Patients with sleep apnea are often sleepy during the day and experience difficulties with concentration on complex or boring tasks. Recent improvements in magnetic resonance imaging (MRI) technology allow targeting very small areas of the brain, such as the brainstem, the region of the brain which contols the upper airway muscles. MRI can detect subtle signs of damage to brain cells, and can assess brain activation induced by a task, such as moving the tongue . AIM 1. To identify the presence and patterns of damage to brain cells in patients with OSA by MRI scanning. 2. To examine whether patients with the most severe patterns of injury are also those with the greatest difficulties with sleepiness and concentration. 3. To determine whether these brain abnormalities improve after 6 months of treatment of OSA. 4. To assess activity of the brainstem in wakefulness in OSA patients and compare this to the activity in subjects without OSA. SIGNIFICANCE: This project will advance our understanding of the causes of obstructive sleep apnea. We anticipate it will provide a new method for investigating injury to brain cells in this disease. It will also provide a new means for investigating the causes of OSA and for evaluating novel therapies aimed at enhancing the activity of upper airway muscles and preventing obstruction during sleep.Read moreRead less
A Randomised Controlled Trial Of The Effect Of Substantial Weight Loss On Obstructive Sleep Apnoea.
Funder
National Health and Medical Research Council
Funding Amount
$404,061.00
Summary
Obstructive sleep apnea is now commonly recognized as a major health problem and frequently ocurrs in overweight or obese individuals. Several studies have now demonstrated that weight loss can be an effective treatment for sleep apnea in those with a weight problem. But, it is extremely difficult to achieve and sustain the major weight loss required to adequately treat this condition. Modern obesity surgery is the only reliable method of achieving and sustaining major weight loss in very obese ....Obstructive sleep apnea is now commonly recognized as a major health problem and frequently ocurrs in overweight or obese individuals. Several studies have now demonstrated that weight loss can be an effective treatment for sleep apnea in those with a weight problem. But, it is extremely difficult to achieve and sustain the major weight loss required to adequately treat this condition. Modern obesity surgery is the only reliable method of achieving and sustaining major weight loss in very obese individuals, and several studies have found that along with weight loss there are major improvements in sleep symptoms, and sleep apnea following weight loss surgery. Despite these findings surgery is rarely advised and has never been formally tested as a therapy for sleep apnea. We propose to formally test, for the first time, the effectiveness of weight loss surgery, as an addition to best conventional therapy, in those individuals with the combination of problems; obesity and significant sleep apnea. We propose that significant weight loss, following surgery, may indeed be the best therapy for those with these combined problems, and that weight loss may have additional benefits for other common problems related to obesity, including high blood pressure, poor body image and impaired quality of life. Forty appropriate patients who suffer these combined problems will be randomly allocated to either conventional therapy for their sleep apnea and weight problems or to a similar program that includes placement of a Lap-Band, a minimially invasive form of obesity surgery. We will follow the patients for 2-years and serially measure a broad range of health and quality of life outcomes and compare the effects of each program. This study will help us assess the role of obesity surgery in this group of patients with major health problems.Read moreRead less