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Investigations In Multiple Sclerosis Patients With Coexistent Autoimmune Thyroid Disease
Funder
National Health and Medical Research Council
Funding Amount
$557,100.00
Summary
Multiple sclerosis (MS) is a common chronic neurological disease affecting over one million people around the world. MS is generally thought to be an autoimmune disease, in which a person's own immune cells start to attack components of the brain and spinal cord. However, it is thought that the same components are not attacked in all patients, and that the pathway that leads to MS varies from one person to another. Therefore, in order to develop successful treatment strategies for MS, it will be ....Multiple sclerosis (MS) is a common chronic neurological disease affecting over one million people around the world. MS is generally thought to be an autoimmune disease, in which a person's own immune cells start to attack components of the brain and spinal cord. However, it is thought that the same components are not attacked in all patients, and that the pathway that leads to MS varies from one person to another. Therefore, in order to develop successful treatment strategies for MS, it will be necessary to look for patterns in the clinical symptoms and signs and other features of a person's MS that may give clues as to which particular pathway is leading to disease in that person. Some people who develop MS also develop other autoimmune diseases, or have these other diseases before they develop MS, or have other family members who have other autoimmune diseases. We have recently found that people who have the same combination of coexistent MS and autoimmune thyroid disease (AITD) show similar clinical signs of MS, and tend to have damage (lesions) to the same areas of their nervous system. This suggests that these people may have the same underlying pathways leading to the development of MS, and that they may be a very informative group in which to look for immune or genetic abnormalities that might explain why they develop MS. This project will investigate people who have both MS and AITD and other members of their families to see if we can work out what the links are between having the same combination of autoimmune diseases and developing lesions in particular parts of the nervous system. It will provide information on the pathways that lead to the development of MS, and information obtained from this study may eventually be of use in developing more specific therapeutic agents, by tailoring therapies to specific people with MS, depending on the clinical and immunological profile of that person.Read moreRead less
The Influence Of NF-KB In The Development Of Autoimmunity And Cancer In Fas/FasL Mutant Mice
Funder
National Health and Medical Research Council
Funding Amount
$596,925.00
Summary
Apoptotic cell death is an essential process in the human body, it removes useless and dangerous cells, preventing autoimmune disease and cancer. Apoptosis is activated when the surface receptor Fas is stimulated by its ligand, FasL, but defective signalling causes disease associated with deregulated NF-?B activation. We will investigate how faulty FasL-induced apoptosis cooperates with deregulated NF-kB activation or defective Aire (immunological tolerance orchestrator) results in autoimmunity.
Identifying The Underlying Mechanisms Responsible For The Generation Of Pathogenic B Cells In Type 1 Diabetes
Funder
National Health and Medical Research Council
Funding Amount
$163,755.00
Summary
Type 1 diabetes (T1D) occurs when the body's own immune system mistakenly attacks and destroys all the beta cells of the pancreas which produce insulin, a hormone essential for regulating sugar levels in the blood. The non-obese diabetic (NOD) mouse develops a form of T1D closely resembling the human disease, and as a model, has led to numerous important insights into its cause. Based on studies in NOD mice, it is now well accepted that a class of cell in the immune system, termed T cells, are r ....Type 1 diabetes (T1D) occurs when the body's own immune system mistakenly attacks and destroys all the beta cells of the pancreas which produce insulin, a hormone essential for regulating sugar levels in the blood. The non-obese diabetic (NOD) mouse develops a form of T1D closely resembling the human disease, and as a model, has led to numerous important insights into its cause. Based on studies in NOD mice, it is now well accepted that a class of cell in the immune system, termed T cells, are responsible for most of the damage to the beta cells in T1D. Recent work in this model, however, has demonstrated that another class of immune cell, termed B cells, also play an important role in T1D as NOD mice made deficient in these cells no longer develop disease. In addition to producing antibodies, B cells are one of the few cell types which are able to take up and present protein fragments in a form recognizable to T cells. Normally, this only leads to the activation of T cells recognising foreign insults, like viruses or bacteria, resulting in their destruction. We have shown that a dangerous population of B cells can arise in NOD mice that can specifically take up beta cell proteins and present them to the T cells, which subsequently become armed to recognise and destroy the beta cells. Just like T cells, B cells that recognize the body's own proteins are normally eliminated in healthy mice and human individuals. This research proposal aims to determine the faulty immune mechanisms that give rise to the beta cell specific B cells in NOD mice. We have also set out to identify the diabetes susceptibility genes which control the generation of this dangerous population of B cells in this model. By understanding how these dangerous B cells are generated in NOD mice, we hope to form the basis for new therapies aimed at inhibiting these cells from forming in T1D susceptible humans, thus preventing the disease at an early stage.Read moreRead less
Organ-specific Autoimmunity: The Role Of The Thymus And Periphery In Shaping The Gastric-specific T Cell Repertoire
Funder
National Health and Medical Research Council
Funding Amount
$579,763.00
Summary
The immune system normally protects against invasion by pathogens such as harmful viruses and bacteria. In autoimmune diseases the same mechanisms that are used to protect us are erroneously targeted to our own tissues. White blood cells, called T lymphocytes are responsible for attacking our own tissues in autoimmune diseases. Our studies will employ a range of molecular, genetic and imaging technologies to track the rare and potential harmful white blood cells. Our studies should reveal the me ....The immune system normally protects against invasion by pathogens such as harmful viruses and bacteria. In autoimmune diseases the same mechanisms that are used to protect us are erroneously targeted to our own tissues. White blood cells, called T lymphocytes are responsible for attacking our own tissues in autoimmune diseases. Our studies will employ a range of molecular, genetic and imaging technologies to track the rare and potential harmful white blood cells. Our studies should reveal the mechanisms by which these self destructive T lymphocytes are silenced in healthy individuals on the one hand, and on the other hand escape to cause destruction in individuals with autoimmune diseases. This fundamental information will allow the development of therapeutic strategies to selectively turn-off these destructive T lymphoctyes in individuals with autoimmune disease and thereby remove the damaging immune response and cure the disease.Read moreRead less
Molecular Signatures Of Public Clonotypes In Human Systemic Autoimmunity
Funder
National Health and Medical Research Council
Funding Amount
$540,633.00
Summary
New platform technology has been developed to study autoantibody clones in lupus and Sjogren's syndrome. This approach has furthered our understanding of these disorders by the discovery of unique sets of clones that are common to all patients. The unique "molecular signatures" of these clones can be translated to a next-generation diagnostic that detects them in patients at extremely low levels missed by conventional tests.
Immune Tolerance In Experimental Autoimmune Encephalomyelitis Following Transplant Of Bone Marrow Cells Genetically Encoding Autoantigen
Funder
National Health and Medical Research Council
Funding Amount
$339,143.00
Summary
Autoimmune diseases affect 5-6% of the population and include diseases such as multiple sclerosis. Our studies focus on examining a gene therapy approach together with bone marrow transplantation to treating autoimmune diseases. Using a model for multiple sclerosis we are finding promising results
In Vivo Investigation Of Human PR3 Transgenic Mice: A Novel Animal Model To Understand The Role Of PR3 In Chronic Inflammation And Autoimmune Vasculitis
Funder
National Health and Medical Research Council
Funding Amount
$378,615.00
Summary
Granulomatosis with polyangiitis (GPA) is a form of vasculitis and is associated with antibodies directed against proteinase 3 (PR3). PR3 is expressed in neutrophils, monocytes and macrophages and has a number of well-characterized pro-inflammatory functions. The aim of this project is to understand the role of PR3 in inflammation and autoimmune vasculitis in vivo. This will be achieved using a transgenic mouse model expressing human PR3.
How Deletional And Non-Deletional Tolerance Mechanisms Integrate To Prevent Autoimmune Disease
Funder
National Health and Medical Research Council
Funding Amount
$509,944.00
Summary
The body produces millions of immune cells every day to fight infection. Some of these immune cells are defective and dangerous because they can cause autoimmune diseases, like Type I diabetes and multiple sclerosis. To defuse this risk, such immune cells are either caused to die or are inactivated to prevent autoimmunity. We propose to investigate how the processes of immune cell death and inactivation work in health and disease so we may harness these mechanisms to cure autoimmunity.