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Investigation Into The Role Of Regulatory B Cells In Transplantation
Funder
National Health and Medical Research Council
Funding Amount
$400,385.00
Summary
Solid organ transplantation is the most effective therapy for treating organ failure and some cancer. However, a common complication that occurs is graft rejection. The current aim is to develop procedures that reduce the risk of graft rejection without the use of immunosuppressive drugs, which can be toxic and make recipients more susceptible to infection. We are investigating the ability of a cell that is part of the immune system to down-regulate over-reactive immune responses and therefore r ....Solid organ transplantation is the most effective therapy for treating organ failure and some cancer. However, a common complication that occurs is graft rejection. The current aim is to develop procedures that reduce the risk of graft rejection without the use of immunosuppressive drugs, which can be toxic and make recipients more susceptible to infection. We are investigating the ability of a cell that is part of the immune system to down-regulate over-reactive immune responses and therefore reduce rejection.Read moreRead less
The Role Of Th17 And Tregs In The Development Of Tolerance And Rejection In A Murine Model Of Renal Allograft Rejection
Funder
National Health and Medical Research Council
Funding Amount
$110,068.00
Summary
In clinical transplantation, rejection remains the greatest problem in determining both short and long-term patient outcomes. Tolerance, the ability of the body to accept a transplant without immunosuppressive drugs, remains an as yet unattained goal. The aim of this project is to examine the mechanisms by which the initial immune response (innate immunity) affects the development of tolerance or rejection in a mouse model of kidney transplantation.
Does Galalpha(1,3)Gal Still Play A Role In Xenograft Destruction After The Production Of Gal Knockout Pigs?
Funder
National Health and Medical Research Council
Funding Amount
$706,062.00
Summary
Advances in surgical and immunosuppressive techniques has led to organ transplantation as the method of choice for the treatment of many diseases. However, the number of suitable donors is dwindling, due to many factors, but largely as a result of the reduction in deaths from car accidents. Xenotransplantation, the transplanting of organs from species other than humans, is now seen as a viable solution to the world wide problem of lack of supply of suitable human donors. The pig is the most suit ....Advances in surgical and immunosuppressive techniques has led to organ transplantation as the method of choice for the treatment of many diseases. However, the number of suitable donors is dwindling, due to many factors, but largely as a result of the reduction in deaths from car accidents. Xenotransplantation, the transplanting of organs from species other than humans, is now seen as a viable solution to the world wide problem of lack of supply of suitable human donors. The pig is the most suitable for a variety of reasons. However, the problem is that all humans contain natural antibodies to the pig which would lead to rejection within a few minutes as the antibodies bind to the transplant and reverse its rapid destruction (so called hyperacute rejection). Recent studies from our laboratory have indicated that most, if not all, of the antibodies react with the sugar - galactose present on many molecules on the surface of transplanted pig tissues. Our studies have indicated very large amounts of this material present in pig blood vessels - guaranteeing the early rejection of transplanted organs such as kidney, heart and liver. The production of knockout pigs which do not express the galactose sugar is an important pre-requisite for successful xenotransplantation. Recently knockout pigs which lack an enzyme that makes this sugar have been produced, but not all the sugar was destroyed. We have recently described a second novel enzyme that also makes this sugar. We will examine a role of this enzyme in xenotransplantation. These studies will be the prelude to the production of pigs which could be used for human transplantation.Read moreRead less
The Structural Basis For Recognition Of HLA-E By Both Innate And Adaptive Immune Systems.
Funder
National Health and Medical Research Council
Funding Amount
$206,255.00
Summary
Biochemistry and structural biology can be used to understand and visualize the three dimesional shape of molecules and the way they interact with other molecules. We will use these approaches to understand how various cells of the immune system recognise the protein HLA-E. This protein is normally present on the surface of healthy cells while it frequently retained inside both tumours and cells infected with viruses. This acts a signal for the immune system to kill these cells. However to avoid ....Biochemistry and structural biology can be used to understand and visualize the three dimesional shape of molecules and the way they interact with other molecules. We will use these approaches to understand how various cells of the immune system recognise the protein HLA-E. This protein is normally present on the surface of healthy cells while it frequently retained inside both tumours and cells infected with viruses. This acts a signal for the immune system to kill these cells. However to avoid being recognized by the immune system some viruses have developed ways to maintain HLA-E expression. This grant will attempt to understand exactly how the immune sytem recognizes HLA-E and how it discriminates between HLA-Eexpressed by healthy cells compared with HLA-E expressed by a virus-infected cell.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989436
Funder
Australian Research Council
Funding Amount
$400,000.00
Summary
Multiphoton microscopy of living animals as a tool for immunology and cell biology studies. The multiphoton microscope will enable us to watch the growth, migration and interactions of cells in a living animal in response to changes in the cells' environment will give us better understanding of how we work as living machines, and what can go wrong with that process to make us unwell.
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0883068
Funder
Australian Research Council
Funding Amount
$150,000.00
Summary
Dako ACIS III Cellular Image Acquisition and Analysis System. The scientific advances that will be possible with the acquisition of this novel, cutting-edge instrument will enhance the research outputs of all investigators using it. The ability to visualize and analyze cells and tissues from many different animal species, to elucidate both normal and abnormal functions, will be enhanced by the use of this technology. This will lead to production of quantitative statistical data that in turn will ....Dako ACIS III Cellular Image Acquisition and Analysis System. The scientific advances that will be possible with the acquisition of this novel, cutting-edge instrument will enhance the research outputs of all investigators using it. The ability to visualize and analyze cells and tissues from many different animal species, to elucidate both normal and abnormal functions, will be enhanced by the use of this technology. This will lead to production of quantitative statistical data that in turn will inform new approaches to improve and maintain the health of humans and other animals.Read moreRead less
Investigating The Function Of Natural Killer Cells During Immunological Responses Following Human Lung Transplantation
Funder
National Health and Medical Research Council
Funding Amount
$71,766.00
Summary
The immune system is critical in controlling common viral infections in healthy individuals. When transplanting foreign solid organs into patients with end-stage lung disease the immune systemÍs activity is decreased via the immunosuppressive drugs to enable graft acceptance. In some patients the immune response can detect similarities between previously encountered viruses and the foreign organ, leading to life-threatening health problems through either rejection episodes and/or graft loss.
Clinical Implications Of Trans-kingdom Microbial Interactions In The Transplanted Lung
Funder
National Health and Medical Research Council
Funding Amount
$631,909.00
Summary
Lung transplantation is a critical requirement for people with severe lung diseases. The lung is constantly exposed to bugs and viruses, which reside in the airways, and can be both beneficial or detrimental for lung health. This interaction between the immune system and these bugs can influence the health and longevity of the lung transplant. We aim to discover how we could target these interactions to improve the long-term success of lung transplantation.
CD39 Protects Against Renal Ischaemic-reperfusion Injury
Funder
National Health and Medical Research Council
Funding Amount
$441,584.00
Summary
In many medical settings, such as heart attacks, strokes, transplantation, heart surgery, shock and infection, the blood supply to an organ may be compromised resulting in damage. The cessation of blood flow depletes the organ of oxygen and generates a number of toxic changes. Re-establishing blood flow to the organ is essential to prevent further damage, however the reestablishment of blood flow itself can be harmful to the organ. The return of blood flow, oxygen and energy can actually promote ....In many medical settings, such as heart attacks, strokes, transplantation, heart surgery, shock and infection, the blood supply to an organ may be compromised resulting in damage. The cessation of blood flow depletes the organ of oxygen and generates a number of toxic changes. Re-establishing blood flow to the organ is essential to prevent further damage, however the reestablishment of blood flow itself can be harmful to the organ. The return of blood flow, oxygen and energy can actually promote more widespread injury - a process known as ischaemia-reperfusion injury (IRI). A greater understanding of IRI should aid in the development of drugs that minimise its impact. The overall aim of this work is to examine the role of a molecule - CD39 - in IRI. This molecule is ideally situated to minimise injury - it is located on cells that line blood vessels and, as such, is able to directly neutralise toxins released in response to this injury. We, therefore, believe that it will be protective in this setting. We have developed animals that express this molecule and have preliminary results to suggest that these animals are protected in experimental models of IRI as well as in several other models including heart transplantation surgery; processes that share many features with IRI. Moreover, mice deplete of this molecule are prone to more severe IRI. We aim to investigate this by using animals both lacking and expressing CD39. Blood flow to the kidneys will be interrupted for 30 minutes and kidney function assessed at 24 and 48 hours. We will then delve into the potential mechanisms underpinning IRI by determining whether the kidney itself or the blood cells afford protection, which has direct clinical implications.Read moreRead less
Gene therapy for islet transplantation. Improved understanding of aetiology of type I diabetes. Development of islet transplantation as a clinical therapeutic for type I diabetes. Improved efficacy of islet transplantation. Improved health for subjects with type I diabetes. Decreased diabetic complications. Improved quality of life for subjects with type I diabetes. Reduced burden on health system for management of diabetic complications for subjects with type I diabetes