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De Novo Mutations And The Pathogenesis Of Childhood-onset Autoimmune Disease
Funder
National Health and Medical Research Council
Funding Amount
$1,406,510.00
Summary
This project aims to reveal the gene abnormalities that cause devastating autoimmune diseases to develop in some children, such as Type 1 diabetes, juvenile arthritis and autoimmune destruction of blood cells. The project will use new technologies to identify alterations in the DNA sequence of a child compared to either of their parents, and to test suspicious DNA alterations in laboratory mice in order to understand the gene effects and evaluate new treatments.
Analysis Of Human CD4+ T-cell Responses To Epitopes Formed By Peptide Fusion In The Pathogenesis Of Type 1 Diabetes
Funder
National Health and Medical Research Council
Funding Amount
$1,239,989.00
Summary
Type 1 diabetes is caused by immune-mediated destruction of the insulin-secreting beta cells. Recently we discovered new targets ‘seen’ by the immune system that may explain why the immune system causes type 1 diabetes. Here we will determine if responses to these targets cause type 1 diabetes. This is important because it tests a new idea and our results will have a major impact on efforts to develop new therapies for type 1 diabetes an other autoimmune diseases.
The Role Of The T Cell Protein Tyrosine Phosphatase In Autoimmunity
Funder
National Health and Medical Research Council
Funding Amount
$654,725.00
Summary
Autoimmune diseases such as type 1 diabetes, Crohns disease & rheumatoid arthritis collectively affect ~5% of Australians & are associated with the immune system attacking the body’s organs as if they were a foreign infection. Genetic studies in humans & animal studies point towards the enzyme TCPTP being important in the prevention of autoimmunity. This proposal will define the molecular & cellular pathways by which TCPTP prevents autoimmunity.
The Molecular Basis Of Human CD4+ T-cell Responses In Autoimmune Diabetes
Funder
National Health and Medical Research Council
Funding Amount
$656,498.00
Summary
Over 120,000 Australians currently suffer from type 1 diabetes. This incurable disease typically strikes in childhood or adolescence and is caused by the immune system destroying the cells which make insulin. This project aims to determine how and why the insulin producing cells are recognized by the immune system. Eventually this work will lead to new vacccines to prevent the immune system from destroying the insulin producing cells.
Prevention Of Autoimmune Diabetes By Immune Tolerance To Proinsulin
Funder
National Health and Medical Research Council
Funding Amount
$504,597.00
Summary
In type 1 diabetes, insulin is the first target of the immune system. Strategies to prevent the immune system targeting insulin in mice early in the disease process work, but it is not clear if such strategies would be effective if applied late. This is important because preventive therapies for human type 1 diabetes are currently feasible only late in the disease process. We aim to address this by removing T cells specific for insulin at different stages of the disease.
Mechanism Of Protection Of Islet Beta Cells From T1D By Heparan Sulfate
Funder
National Health and Medical Research Council
Funding Amount
$602,453.00
Summary
Type 1 diabetes (T1D) is an autoimmune disease which destroys the insulin-producing beta cells in the pancreas. Current insulin therapy does not prevent the development of serious secondary complications. We have discovered that beta cells require a complex sugar (heparan sulfate; HS) for their survival and that T1D is prevented when an enzyme, heparanase, that degrades HS is inhibited. Understanding these mechanisms will identify new therapeutic strategies for preventing T1D progression.
A Novel Role For The IL-2 Pathway In Type-1-diabetes.
Funder
National Health and Medical Research Council
Funding Amount
$548,548.00
Summary
Genes encoding IL-2 and its receptor are strongly linked to susceptibility to multiple autoimmune diseases, including type-1-diabetes. Despite the importance of this pathway in the immune system, it is not yet understood how the associated genes affect disease. In this study, a novel function for IL-2 expression by dendritic cells in normal self-tolerance is investigated. The impacts of dendritic cell produced IL-2 expression and linkage to autoimmunity will be elucidated in both mouse and man.
How Does Disruption Of Serinc1 Expression Affect Lymphocyte Function And The Development Of Autoimmunity?
Funder
National Health and Medical Research Council
Funding Amount
$681,555.00
Summary
Autoimmune diseases affect up to 8% of the population. We have recently discovered a novel gene mutation in mice that results in increased levels of anti-nuclear antibodies, a hallmark of various autoimmune diseases in humans. The mutated gene, Serinc1, has not been previously implicated in autoimmune disease, but it is important for synthesis of key molecules in immune cells. This research proposal aims to determine how disruption of Serinc1 contributes to the development of autoimmune disease.
How Does Genetic Variation For Trig Affect Autoimmune Responses Mediated By Toll-like Receptors?
Funder
National Health and Medical Research Council
Funding Amount
$671,114.00
Summary
Juvenile diabetes is an autoimmune disease that affects more than 120,000 Australians. We have recently discovered a novel gene, named Trig, in a genetic study of mice that develop juvenile diabetes similar to children. This research proposal aims to determine the function of Trig in the immune system and how it contributes to the development of autoimmune diseases, such as juvenile diabetes.