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Analysis Of T Cell Fate Regulation By Asymmetric Cell Division
Funder
National Health and Medical Research Council
Funding Amount
$287,321.00
Summary
The aim of this research is to study how white blood cell growth is regulated by signals of the immune system. Problems in this process can have drastic effects on the well being of an individual leading to deficiencies in controlling infection and development of diseases such as cancer. Once we understand how these signals regulate white blood cell growth, we can begin to develop therapies to provide protection against these diseases.
The Quantitative Regulation Of Antibody Forming Cell Differentiation
Funder
National Health and Medical Research Council
Funding Amount
$336,500.00
Summary
B lymphocytes are the antibody-producing cells of the immune system. After they are made in the bone marrow, they are exported to the body to circulate, searching for signs of infection. When they encounter an invader, they change, with the help of other immune cells, into antibody-producing cells. A small proportion of the cells are set aside as memory cells that can rapidly become antibody-producing cells should the same infection occur again in the future. This is the basis of vaccination. Th ....B lymphocytes are the antibody-producing cells of the immune system. After they are made in the bone marrow, they are exported to the body to circulate, searching for signs of infection. When they encounter an invader, they change, with the help of other immune cells, into antibody-producing cells. A small proportion of the cells are set aside as memory cells that can rapidly become antibody-producing cells should the same infection occur again in the future. This is the basis of vaccination. The secretion into serum of antibodies that can bind to and eliminate an invader anywhere in the body is the main function of B lymphocytes. This project studies how a B cell changes into an antibody-producing cell. We will learn very basic and detailed quantitative aspects of the process, such as: -How long does it take to become an antibody-producer once a B cell detects an invader? -Do they-must they divide while they are changing? -How do hormones from other cells regulate the process? Do they increase division, survival, change the properties of the B cells, or improve their output? We will study all these responses in detail, so that we can make a model that can accurately predict the outcome of a particular set of circumstances. We will study the genes that are known to be required for antibody-producing cells to form, or to do their work. We will also study animals whose immune systems are under- or over-active, to find out what part of the antibody-producing process is faulty. We may be able to predict where the problem lies, by comparing these animals cells to our model, and therefore to suggest a remedy. Using this information, we hope eventually to be able to study diseases of antibody producing cells in humans (as occur in allergy, asthma, rheumatoid arthritis and leukaemia), to be able to identify the precise cause of the problem, and to suggest a therapy. This information may also be used to improve the outcome of vaccination.Read moreRead less
The Investigation Of Immune Function In Mice Deficient In RNA-binding Molecules.
Funder
National Health and Medical Research Council
Funding Amount
$419,737.00
Summary
Our immune system is delicately balanced between fighting off bugs and destroying infected cells yet protecting healthy cells within the body. The ways in which the immune system responds to attack is regulated by certain genes within the body. This project is focussing on cutting edge research that describes a newly identified way of fine-tuning the immune system. We are studying RNA-binding molecules that can bind to and block genes involved in immune function.
Investigating Polarity Proteins In Thymocytes- A Potential Role In Asymmetric Cell Division?
Funder
National Health and Medical Research Council
Funding Amount
$69,684.00
Summary
To protect us against infection, surveying immune cells will launch an attack against foreign cells by using complex signalling process to communicate with each other. A novel method in which immune cells differentiate to defend the body against infection has been recently discovered this year and this project will involve dissecting how this occurs. It will involve using state-of-the-art laser-based technologies, combined with studying immune events in cells and intact organs.
Competition For Polarity Influences Lymphocyte Differentiation And Function
Funder
National Health and Medical Research Council
Funding Amount
$380,558.00
Summary
CD46 is a protein on human cells that viruses and bacteria bind to during infection. Our laboratory has found that binding of CD46 on immune cells impairs their ability to recognize and kill target cells and may explain the immunosuppression caused by measles infection. We aim to investigate the mechanisms behind the effect of CD46 on immune cells. The outcomes of this study will define new paradigms in lymphocyte biology and determine how CD46 influences the immune response to infection.
The immune system plays an important role in protecting us from infectious diseases. To do this it regulates a series of cell types that must decide upon an appropriate course. In general, this response is successful and protective. However, occasionally the cells make an inappropriate decision leading to problems. For example, allergies are an incorrect response against pollens and dust mites. Similarly, autoimmune disease such as diabetes and multiple sclerosis result from inappropriate attack ....The immune system plays an important role in protecting us from infectious diseases. To do this it regulates a series of cell types that must decide upon an appropriate course. In general, this response is successful and protective. However, occasionally the cells make an inappropriate decision leading to problems. For example, allergies are an incorrect response against pollens and dust mites. Similarly, autoimmune disease such as diabetes and multiple sclerosis result from inappropriate attack upon our own tissues. Despite the clear importance of immune regulation for health, the complexity of its behaviour has made it difficult to predict and control. In this research program a new theory of immune regulation with clear implications for rational intervention and beneficial manipulation of the immune system will be developed.Read moreRead less
Regulation Of Macrophage Function And Gene Expression By The Th2-Promoting Stimulus, ES-62
Funder
National Health and Medical Research Council
Funding Amount
$465,750.00
Summary
White blood cells are responsible for co-ordinating the immune response against foreign micro-organisms. Macrophages are a particular type of white blood cell that attempt to destroy microbes during the initial stages of an infection, but also release toxic substances that are responsible for pathology and side effects during many immune responses. This project aims to address how macrophages are involved in a particular type of immune response that develops when individuals are susceptible to c ....White blood cells are responsible for co-ordinating the immune response against foreign micro-organisms. Macrophages are a particular type of white blood cell that attempt to destroy microbes during the initial stages of an infection, but also release toxic substances that are responsible for pathology and side effects during many immune responses. This project aims to address how macrophages are involved in a particular type of immune response that develops when individuals are susceptible to certain diseases including asthma and diseases associated with intracellular infections. We are identifying genes expressed in macrophages during these immune responses that are likely to be involved in susceptibility to such diseases.Read moreRead less