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A Prospective Study To Identify The Mechanical Causes And Methods For Early Detection Of Knee Osteoarthritis
Funder
National Health and Medical Research Council
Funding Amount
$431,000.00
Summary
Knee osteoarthritis is a great cost to society, financially and in quality of life. Anti-inflammatory drugs are commonly used to treat the symptoms, but many people receive joint replacements to stop pain and improve function. We need to prevent osteoarthritis, but the causes for this common disease are largely unknown. Animal studies have shown two particular mechanical factors that cause osteoarthritis, which are seen in the walking and running, or gait, patterns of some people. We call these ....Knee osteoarthritis is a great cost to society, financially and in quality of life. Anti-inflammatory drugs are commonly used to treat the symptoms, but many people receive joint replacements to stop pain and improve function. We need to prevent osteoarthritis, but the causes for this common disease are largely unknown. Animal studies have shown two particular mechanical factors that cause osteoarthritis, which are seen in the walking and running, or gait, patterns of some people. We call these pathological gait patterns as they impose larger-than-normal forces on the knee's articular surfaces. We measure these knee forces with our new computer knee model coupled with data that we measure in a gait analysis laboratory. These forces may cause knee osteoarthritis in humans, but this is still unknown. Currently there is no simple medical test to detect the early onset of knee osteoarthritis. The bones in the knee are one of the first structures to show osteoarthritic changes. Using our new computerised analysis of high definition X-ray of the knee we can identify subtle differences in the knee due to osteoarthritis. This will be compared with changes to joint assessed using MRI. Osteoarthritis develops slowly in normal people, so to study progression of knee osteoarthritis we need a human population that has a higher risk of developing the disease. Partial meniscectomy in the knee is a common surgery performed to improve knee function in those who have suffered a knee meniscus injury. However, partial meniscectomy patients have a high risk of developing knee osteoarthritis. Therefore, using partial meniscectomy patients we are investigating if pathological gait patterns cause knee osteoarthritis, measuring the development of the disease with our new X-ray methods. With the gait analysis methods we can also identify the movements that characterise these pathological gait patterns so we can formulate rehabilitation programmes to help prevent knee osteoarthritis.Read moreRead less
Hormonal Resuscitation And P38 MAP Kinase Inhibition To Enhance Quality Of Cadaveric Donor Organs For Transplantation
Funder
National Health and Medical Research Council
Funding Amount
$469,500.00
Summary
The transplantation of organs such as the heart, lung, liver, kidney and pancreas from brain-dead donors is limited primarily by the shortage of donor organs. It is now recognised that as many as 25% (one in four) potentially usuable donor organs are lost after brain death due to the rapid deterioration that occurs in organs after brain death. There is evidence that this deterioration is due to loss of the normal hormones that are essential to the normal functioning of these organs. In this proj ....The transplantation of organs such as the heart, lung, liver, kidney and pancreas from brain-dead donors is limited primarily by the shortage of donor organs. It is now recognised that as many as 25% (one in four) potentially usuable donor organs are lost after brain death due to the rapid deterioration that occurs in organs after brain death. There is evidence that this deterioration is due to loss of the normal hormones that are essential to the normal functioning of these organs. In this project, we will use a pig model of brain death that we have extablished in our laboratory to examine the effects of hormone replacement on the function of organs that are used for transplantation. We will also test a novel drug aimed at protecting donor organs during the period between removal of the organ and transplantation. If successful, these treatments have the potential to markedly increase the numbers of organ transplants and to improve the outcomes for recipients of these transplants. In the Australian and New Zealand setting, a 25% increase in the number of donor organs would results in approximately 220 more people per year receiving these life-saving operations.Read moreRead less
Improved Patient Outcomes Through Dosage Individualisation Of The Newer Immunosuppressant Drugs
Funder
National Health and Medical Research Council
Funding Amount
$486,206.00
Summary
After organ transplantation, recipients need to take medicines continually to stop their immune system from rejecting their new organ. This treatment with immunosuppressant drugs is vital for long-term success of their graft. However, too many people are losing their transplant or are experiencing drug toxicity or infection due to poorly managed immunosuppression. The project aims to accurately define the best way to dose newer immunosuppressant drugs in Australian transplant populations.
Role Of Sympathetic Nervous System In The Development Of Early Organ Damage In Obesity:an Emerging Target For Therapy
Funder
National Health and Medical Research Council
Funding Amount
$544,534.00
Summary
Young people with obesity often have no signs of cardiovascular disease but their organs, such as the heart, the kidneys and the blood vessels present early evidence of damage that can, in time, progress to confer cardiovascular risk. This study will look at the potential beneficial effect of a drug, by itself or in association with a low calorie diet, in reversing the progression of organ damage in young obese subjects.
The Role And Function Of Macrophages In Cellular Xenograft Rejection
Funder
National Health and Medical Research Council
Funding Amount
$323,250.00
Summary
The long term objective of this project is to develop pig insulin secreting tissue as a treatment for type 1 diabetes. At present the main barrier to this is rejection. In paricular a type of white blood cell called macophages has an important role in causing the rejection seen in xenotransplantation (the transplantation of pig tissue into humans). Our reseach group has made novel observations which show that the way macrophages respond to a xenotransplant is different to the way it behaves to t ....The long term objective of this project is to develop pig insulin secreting tissue as a treatment for type 1 diabetes. At present the main barrier to this is rejection. In paricular a type of white blood cell called macophages has an important role in causing the rejection seen in xenotransplantation (the transplantation of pig tissue into humans). Our reseach group has made novel observations which show that the way macrophages respond to a xenotransplant is different to the way it behaves to the transplant of an organ from the same species. In the rejection of pig insulin secreting tissue, macrophages are able to respond in the absence of ongoing signals from T cells. This project aims to identify the receptors on macrophages that are responsible for this response. In particular those receptors that are important for facilitating the migration of macrophages to the transplant site and the receptors that allow macrophages to distinguish self from non-self will be analysed. Hopefully these receptors will be used as targets for new therapeutic agents that could be used to prevent the strong rejection response that occurs when pig insulin secreting tissue is transplanted into humans.Read moreRead less
Approaches To Allogeneic Chimerism For The Induction Of Transplantation Tolerance
Funder
National Health and Medical Research Council
Funding Amount
$212,036.00
Summary
All patients with organ failure who receive a transplant require lifelong immunosuppressive medications to prevent the body from rejecting the foreign tissue. Indefinite immunosuppressive therapy is associated with significant side-effects which include infections and cancers. In addition, long-term loss of the transplants due to slow rejection (chronic rejection) remains high. Achieving a state of immunological tolerance in which transplanted tissue is regarded as self, but reactivity to all ot ....All patients with organ failure who receive a transplant require lifelong immunosuppressive medications to prevent the body from rejecting the foreign tissue. Indefinite immunosuppressive therapy is associated with significant side-effects which include infections and cancers. In addition, long-term loss of the transplants due to slow rejection (chronic rejection) remains high. Achieving a state of immunological tolerance in which transplanted tissue is regarded as self, but reactivity to all other foreign tissues (e.g. harmful viruses, bacteria) remain normal, would solve all these problems. Tolerance would eliminate the need for immunosuppressive medications and prevent rejection of transplanted organs. The production of mixed bone marrow chimerism is a potent method of inducing tolerance. Chimerism is a state in which bone marrow tissue from two genetically different individuals coexists in one person. This can be achieved by bone marrow transplantation from a specific donor, and if chimerism is achieved, the recipient will accept all tissues from the bone marrow donor without the need for ongoing immunosuppressive therapy. This study will attempt to examine the use of different therapeutic reagents (e.g. antibodies alone or antibodies linked to idarubicin, a drug which prevent cells dividing) to develop safe protocols for the production of bone marrow chimerism and tolerance for routine clinical use in humans. The study will also examine different cellular components of the donor bone marrow which may induce tolerance.Read moreRead less
Improved Identification Of At-risk Brain Tissue In Patients With Stroke
Funder
National Health and Medical Research Council
Funding Amount
$279,044.00
Summary
Stroke is one of the most frequent causes of death and the major cause of adult neurological disability. Diagnostic tools to improve its management are therefore crucial. This project is dedicated to improving the magnetic resonance imaging techniques for measuring blood flow to the brain, and to applying these to patients who have had a stroke. Improved methods will enable better prediction of tissue outcome following stroke, thus enabling optimal early management decisions to be taken.