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To investigate alternative strategies to treat end stage renal disease we have transplanted embryonic kidneys into the wall of the abdominal cavity of adult hosts where they become vascularised and undergo continued but limited development. Strategies to enhance their growth-development and decrease immunogenicity-rejection will now be determined, and the origin of a 'ureter-like' tube of tissue that grows to connect the transplanted embryonic kidney with the recipient bladder investigated.
Targeting Innate Immunity To Prevent Chronic Dysfunction Of The Transplanted Kidney
Funder
National Health and Medical Research Council
Funding Amount
$497,057.00
Summary
Kidney transplantation is the optimal treatment for patients suffering from end-stage kidney disease. Chronic transplant dysfunction is the major barrier to long-term health after transplantation, and is the subject of this application. Our studies suggest a signaling system activates immunity and leads to chronic transplant dysfunction. We aim to block this signaling system in mouse models to identify clinically applicable treatments to prevent kidney transplant failure.
Kidney failure is a major health disorder in Australia and with more diabetes the number of patients waiting for transplant on dialysis is increasing. Current treatments give good initial survival of the kidney transplant but most kidneys are lost due to chronic damage . We propose a number of tolerance strategies in a model of kidney transplantation that will allow transplantation without longterm immunosuppression.
Superoxide And The Nitric Oxide-peroxynitrite Pathway In Renal Ischaemia-reperfusion Injury
Funder
National Health and Medical Research Council
Funding Amount
$202,755.00
Summary
Acute renal failure is common and has 50% mortality. Free radicals are vey reactive, unstable molecules that alter normal metabolic reactions. The study aims to determine the role of oxygen-derived free radicals and nitric oxide and their interaction in renal ischaemic injury. The balance between the positive effects of nitric oxide on blood flow and the damaging effects of by-products of the reaction of nitric oxide with superoxide radical (peroxynitrite) on renal tubules may determine the exte ....Acute renal failure is common and has 50% mortality. Free radicals are vey reactive, unstable molecules that alter normal metabolic reactions. The study aims to determine the role of oxygen-derived free radicals and nitric oxide and their interaction in renal ischaemic injury. The balance between the positive effects of nitric oxide on blood flow and the damaging effects of by-products of the reaction of nitric oxide with superoxide radical (peroxynitrite) on renal tubules may determine the extent of cell damage and hence recovery from ischaemic and hypoxic renal injury. Modulation of these opposing forces may lead to strategies to protect and improve renal function in acute renal failure in man.Read moreRead less
The Role Of Tissue Factor In Renal Ischaemia-Reperfusion Injury
Funder
National Health and Medical Research Council
Funding Amount
$268,500.00
Summary
Reestablishment of blood flow to an organ (reperfusion) following temporary cessation or obstruction is essential for survival and recovery of the organ. However while essential for organ survival reperfusion results in damage to the organ in a number of cases, including heart, brain, kidney, and gastrointestinal tract, with important implications for patient morbidity and mortality. In the kidney lack of blood flow can result in acute kidney failure that is a costly condition to manage often re ....Reestablishment of blood flow to an organ (reperfusion) following temporary cessation or obstruction is essential for survival and recovery of the organ. However while essential for organ survival reperfusion results in damage to the organ in a number of cases, including heart, brain, kidney, and gastrointestinal tract, with important implications for patient morbidity and mortality. In the kidney lack of blood flow can result in acute kidney failure that is a costly condition to manage often requiring admission to an intensive care unit and is still associated with a significant risk of death. Reperfusion injury that occurs during renal transplantation is currently thought to be an important contributor to delayed establishment of kidney function following transplantation that in turn may increase the incidence of acute and chronic rejection. The studies outlined in this proposal will investigate how molecules involved in the blood clotting system may contribute to the inflammatory response that occurs upon reperfusion of the kidney following prior obstruction of blood flow. We will study a mouse model of kidney reperfusion injury and using genetically modified mice determine the role of various blood clotting-related proteins in subsequent inflammation and organ damage. The approach to be employed will provide a powerful method to determine the role of various molecules and pathways in contributing to kidney damage after reperfusion injury. Interventions that may reduce the incidence or severity of renal damage following kidney reperfusion injury have the potential to be of major benefit to patients and to reduce health care costs.Read moreRead less
The Role Of Renal Dendritic Cells In Infection And Immunity Under Immunosuppression
Funder
National Health and Medical Research Council
Funding Amount
$475,143.00
Summary
Kidney transplantation is the best treatment for kidney failure but it is frequently complicated by bacterial and viral infections that can cause rejection and may cause loss of the kidney. This grant will study the role that dendritic cells in the kidney play in causing rejection and preventing infection. With the knowledge gained from these studies, we will be able to discover new ways to prevent rejection and treat infections of the kidney post transplant.