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The Regulation Of B Cell Differentiation And Survival In Response To Antigen Challenge
Funder
National Health and Medical Research Council
Funding Amount
$763,409.00
Summary
Antibodies are crucial to health and well being but can cause disease if their production is not controlled appropriately. This research program examines the basis of antibody production in normal situations and in situations where it is causing illness, in diseases like system lupus erythematosus (SLE) and in cancers of antibody producing cells called multiple myeloma (MM). The aim is to enable control of the process to achieve better health outcomes and better management of disease.
Dissecting Apoptosis And IL-15 Dependent Homeostasis Pathways Of Natural Killer (NK) Cells
Funder
National Health and Medical Research Council
Funding Amount
$423,809.00
Summary
We will investigate how the cytokine IL-15 regulates the homeostasis of natural killer (NK) cells. NK cells are critical for immune responses against invading viruses or bacteria or upon detection of transformed cells. NK cells are primed to attack infected or transformed cells and are rapidly activated by direct interaction or by soluble signals. Knowledge of how NK cells development and how their numbers and function are controlled is paramount to understanding infectious disease immunology an ....We will investigate how the cytokine IL-15 regulates the homeostasis of natural killer (NK) cells. NK cells are critical for immune responses against invading viruses or bacteria or upon detection of transformed cells. NK cells are primed to attack infected or transformed cells and are rapidly activated by direct interaction or by soluble signals. Knowledge of how NK cells development and how their numbers and function are controlled is paramount to understanding infectious disease immunology and developing better immuno-therapies.Read moreRead less
The Role Of Hox Genes In Myeloid Cell Development And Myeloid Leukaemia
Funder
National Health and Medical Research Council
Funding Amount
$591,286.00
Summary
The transformation of normal white blood cells into leukaemic cells occurs as a result of changes to the genes of those cells. These changes are often characteristic of particular cancers and carry diagnostic and prognostic significance. This work will determine how critical some of the typical genetic changes of leukaemia are to the occurrence and persistence of cancer. Importantly, we will determine whether targeting these changes can provide new and effective approaches to treatment.
Thymic Epithelial Cell Apoptosis, Aire And Autoimmune Disease.
Funder
National Health and Medical Research Council
Funding Amount
$470,799.00
Summary
Autoimmune diseases, like diabetes and multiple sclerosis are a significant disease burden. Their root cause is the failure of the immune system to distinguish between the body's own tissues and potential pathogens. We propose to study how potentially dangerous immune cells are destroyed in the thymus before they can develop. This research will significantly improve our understanding of how autoimmune diseases begin.
Regulation Of Mitochondrial Fission, Fusion And Distribution
Funder
National Health and Medical Research Council
Funding Amount
$480,128.00
Summary
Mitochondria are subcellular compartments that produce most of the energy for our bodies, in the form of ATP. They were once thought of as small bean-shaped organelles floating around in our cells, but it is now known that mitochondria instead form networks of tubules that undergo changes in their shape through both fission and fusion events. Mitochondria are transported along microtubules that act as highways in the cell so that they can be distributed to areas that require ATP or other special ....Mitochondria are subcellular compartments that produce most of the energy for our bodies, in the form of ATP. They were once thought of as small bean-shaped organelles floating around in our cells, but it is now known that mitochondria instead form networks of tubules that undergo changes in their shape through both fission and fusion events. Mitochondria are transported along microtubules that act as highways in the cell so that they can be distributed to areas that require ATP or other specialist functions such as uptake and release of calcium. In specialist cells, mitochondria are organised even further. Sperm cells contain mitochondria packed around the mid-piece of the flagellum so that ATP can be utilised directly for swimming. Proper mitochondrial distribution also appears to be required for nerve cell development and function while in pancreatic cells they sit at the cell's edge and help regulate the secretion of insulin into the bloodstream. While we now realise the great importance of mitochondria to the cell, we are only beginning to work out how these organelles undergo the drastic morphological changes which are essential for cellular function. Of the few known components involved in shaping mitochondria, some have been found to be essential to life and their gene mutations are linked to neurological disorders, while others appear to be recruited in the activation of cell death pathways. In this application, we plan to identify and characterise the proteins involved in movement and shaping of these organelles. Understanding the fundamental mechanisms of mitochondrial dynamics will provide valuable insights into mitochondrial segregation and specialisation in cells and their defects that lead to disease.Read moreRead less
To study the genetic alterations that give rise to cancer. In particular, exploring how too little death of cells can lead to a tumour. If too few cells in a tissue die, a tumour may develop there. The team is exploring how the cell death process is normally controlled. They plan to characterise the molecules inside cells that determine whether a cell lives or dies and hope that better understanding of those molecules will help to explain how tumours arise. It could also lead to new drugs that c ....To study the genetic alterations that give rise to cancer. In particular, exploring how too little death of cells can lead to a tumour. If too few cells in a tissue die, a tumour may develop there. The team is exploring how the cell death process is normally controlled. They plan to characterise the molecules inside cells that determine whether a cell lives or dies and hope that better understanding of those molecules will help to explain how tumours arise. It could also lead to new drugs that can kill tumour cells more effectively by directly triggering the normal death switch of the cell.Read moreRead less
Synthetic Analogues Of The Actinomycin, Quinamycin And Nogalamycin Groups Of Antitumour Antibiotics
Funder
National Health and Medical Research Council
Funding Amount
$376,433.00
Summary
The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar ....The principal difficulty in the treatment of the common solid tumours that cause the majority of cancer deaths is the problem of drug resistance. For example, many patients with cancer of the lung, breast or colon respond well to drug treatment with their tumours initially regressing, only to return later in an aggressive drug-resistant form. In this event, the inevitable outcome is that the tumour grows through drug treatment and the patient eventually succumbs and dies. This is also a familiar scenario in the treatment of adults with leakaemias and non-Hodgkins lymphomas. The underlying cause of drug resistance is the genetic instability of cancer cells which results in tumours that are heterogeneous, making it almost inevitable that a cancer cell will arise that is resistant to treatment. There are many mechanisms of resistance, some of which are peculiar to particular drug types, some are permeability barriers and some involve genetic deregulation of the biochemistry of cell death. One way of subverting resistance is by the use of drugs whose mechanism of action is novel so that the tumour is challenged to devise a new defense. Here, we are attempting to develop synthetic analogues of a class of naturally- occurring antitumour antibiotic whose mechanism of action is unusual but which has not been exploited by medicinal chemists because of the difficulty of the chemistry involved. These antibiotics work by binding to DNA and inhibiting the first step in the process whereby genes are turned into proteins. We have designed compounds that are chemically accessible that our preliminary work suggests mimic the DNA-binding and biological properties of the natural antibiotics. The proposed work will enable us to evaluate whether this new class of agent has experimental antitumour activity, particularly amongst drug-resistant tumours.Read moreRead less
Making Human T- And B-lymphocytes For Immunotherapy And Antibody Production
Funder
National Health and Medical Research Council
Funding Amount
$795,880.00
Summary
Lymphocytes are white blood cells that are involved in producing antibodies, killing defective cells, or killing cells infected with viruses. In recent years, researchers have found ways to harness lymphocytes to develop medicines for treating a variety of different cancers. In this project, we will establish methods to make human lymphocytes in the laboratory from stem cells, paving the way for the broader application of this cell type to new therapies.
Roles Of Impaired Apoptosis And Differentiation In Tumourigenesis And Therapy
Funder
National Health and Medical Research Council
Funding Amount
$21,656,910.00
Summary
The ten scientific laboratories in this program have joined forces to investigate two ways in which tumours develop. Both are of particular interest, because they suggest new ways in which cancer might be overcome. Most of our tissues are continually renewed throughout life by production of new cells. Therefore many of the old cells in each tissue must die off to maintain the proper cell numbers. To eliminate cells that are no longer needed or have become damaged, the body has developed a remark ....The ten scientific laboratories in this program have joined forces to investigate two ways in which tumours develop. Both are of particular interest, because they suggest new ways in which cancer might be overcome. Most of our tissues are continually renewed throughout life by production of new cells. Therefore many of the old cells in each tissue must die off to maintain the proper cell numbers. To eliminate cells that are no longer needed or have become damaged, the body has developed a remarkable cell suicide process termed apoptosis. Unfortunately, however, occasionally a random accident to the genes in one of our cells prevents the machinery for apoptosis from being turned on. In that case, the cell will not die when it should and, by continually dividing, it may eventually give rise to a cancer. Since most cancer cells still retain most of the machinery for apoptosis, however, a drug that could switch on this natural cell death machinery would provide a promising new approach to cancer therapy. Identifying and developing such drugs is one major long-term goal of this program. The other focus of our program concerns stem cells. These are rare cells with the remarkable ability to generate an entire tissue. For example, one of our laboratories has identified stem cells that can generate all the cells in the breast. The almost unlimited regenerative capacity of stem cells has a built-in danger. If a stem cell acquires the ability to proliferate excessively, it can go on to form a tumour. Indeed, many cancer researchers now suspect that rare stem cells within a tumour cause its inexorable growth. If tumour growth is maintained by stem cells, it will be essential to develop new forms of therapy that target these rare cancer stem cells rather than merely the bulk of the tumour cells. This is another key long-term goal of our program.Read moreRead less