HYPOXIA AND THE TRANSCRIPTIONAL REGULATION OF CYP GENES IN CELLS
Funder
National Health and Medical Research Council
Funding Amount
$211,527.00
Summary
Hypoxia, or oxygen deprivation caused by the decreased supply of blood to cells, is a component of ischaemic injury of the cardiovascular system (as in angina or atherosclerosis) and numerous other organs (e.g. in cancer and chemical-mediated injury). It is now known that the content of certain proteins that activate specialised target genes is increased rapidly in cells in response to oxygen deprivation. Some of the most important of these proteins are hypoxia-inducible factor-1 (or HIF-1) and ....Hypoxia, or oxygen deprivation caused by the decreased supply of blood to cells, is a component of ischaemic injury of the cardiovascular system (as in angina or atherosclerosis) and numerous other organs (e.g. in cancer and chemical-mediated injury). It is now known that the content of certain proteins that activate specialised target genes is increased rapidly in cells in response to oxygen deprivation. Some of the most important of these proteins are hypoxia-inducible factor-1 (or HIF-1) and activator protein-1 (or AP-1). We have identified a novel target gene that is activated in hypoxia. This gene produces an enzyme, termed cytochrome P450 2J2, that acts on fatty acids which are present in cell membranes and converts them into molecules that control the flow of potassium and calcium ions into cells. Alterations in the flow of such ions into cells have been observed previously in hypoxia but the mechanism of this effect is unclear. Thus, cytochrome P450 2J2 is switched on in hypoxia and generates fatty acid metabolites that control protective ion fluxes in cells.Read moreRead less
Impact Of Disrupted Sleep And Rhythms During Pregnancy On The Mother And Her Offspring
Funder
National Health and Medical Research Council
Funding Amount
$796,979.00
Summary
Sleep disruption and circadian rhythm disturbances are emerging as a significant public health issue for all shift workers. The objective of this study is to further define and understand the effects of disrupted sleep rhythms specifically during pregnancy on the mother’s metabolism and the long term impact on the metabolic health of her offspring. The long term aim is to use the research outcomes to develop strategies for prevention of the harm to mother and child.
A New Clinical Tool To Assess Fitness-to-drive In Obstructive Sleep Apnea
Funder
National Health and Medical Research Council
Funding Amount
$727,963.00
Summary
Obstructive sleep apnoea (OSA) affects 1 in 4 middle aged adults. OSA results in impaired neurobehavioral function, excessive sleepiness, and more than 2-fold increased motor vehicle crash risk and workplace accidents. However, not all patients are impaired and identifying patients at risk is a daily clinical challenge. This project proposes new and simple measures that can accurately identify patients with OSA who are most vulnerable to alertness failure and motor vehicle accident risk.
Domiciliary Oxygen Therapy In Interstitial Lung Disease
Funder
National Health and Medical Research Council
Funding Amount
$124,608.00
Summary
Interstitial lung diseases (ILD) are chronic lung diseases with significant health impacts, but limited drug treatment options. Although home oxygen treatment (HOT) is commonly used in these patients, its clinical benefits are uncertain with potential risks and significant costs for both patients and the health care system. Very little published information is available on the use of HOT in these patients. These studies aim to improve our knowledge and management of HOT in patients with ILD.
Effects Of Circadian Disruption And Sleep Deprivation In Respiratory Disorders
Funder
National Health and Medical Research Council
Funding Amount
$408,000.00
Summary
This project aims to determine the impact of reduced sleep hours and jet lag-sleep time shift in two very common breathing disorders; sleep apnea (snoring sickness) and asthma. We will also make measurements in healthy normal people as well. Reduced sleep hours are common in many sections of society due to a number of factors, including increased work hours, overtime, shiftwork, medical conditions (sleep and other medical disorders), caring for a new baby, and other family and social demands. In ....This project aims to determine the impact of reduced sleep hours and jet lag-sleep time shift in two very common breathing disorders; sleep apnea (snoring sickness) and asthma. We will also make measurements in healthy normal people as well. Reduced sleep hours are common in many sections of society due to a number of factors, including increased work hours, overtime, shiftwork, medical conditions (sleep and other medical disorders), caring for a new baby, and other family and social demands. In addition, body clock disruption due to shiftwork, transmeridien travel, circadian based sleep disorders and other factors that shift the timing of normal sleep-wake behaviour is also very prevalent in today's society. The effects of reduced sleep hours and jet lag-sleep time shift effect a number of body systems but have only been studied to a limited extent in the breathing system. Jet lag-sleep time shift changes are result of changes to the body clock rhythms - these rhythms effect coordinate activities of essentially all bodily functions, vigilance and thinking, heart, breathing, hormones, bowel function and the immune system that fights off infection and cancer. Together, this body clock system and sleep coordinate the majority of systems of the body and brain. This project will address a number of questions including whether reduced sleep hours worsen brain function in sleep apnea or whether shifting sleep (jet lag effect) can worsen airway function and increase risk of asthma. We will use two types of study - simulated jet lag and reduced sleep hours under complete laboratory supervision to test our theoriesRead moreRead less