Determinant Spreading And The Role Of The MHC Class II Region In Systemic And Organ-specific Autoimmunity
Funder
National Health and Medical Research Council
Funding Amount
$140,570.00
Summary
Autoimmune diseases are among the most important group of disorders affecting the adult population. In these diseases the immune system damages organs and tissues producing widespread pathology (systemic autoimmunity such as Lupus erythematosus) or localised disease (organ-specific autoimmunity such as insulin dependent diabetes). We understand very little about how and why the immune system attacks the body's own tissues. This study examines how antibodies and T lymphocytes are formed against c ....Autoimmune diseases are among the most important group of disorders affecting the adult population. In these diseases the immune system damages organs and tissues producing widespread pathology (systemic autoimmunity such as Lupus erythematosus) or localised disease (organ-specific autoimmunity such as insulin dependent diabetes). We understand very little about how and why the immune system attacks the body's own tissues. This study examines how antibodies and T lymphocytes are formed against components located inside cells of the body. The study involves genetically modifying mice by introducing key human genes which influence the development of autoimmunity. In this way the role of these human genes can be examined experimentally without having to work exclusively on patients. We also hope that these mice might be important in creating new models of celiac disease and insulin dependent diabetes. The proposed experiments should tell us how these genes contribute to the development of autoimmune disease. This understanding could be relevant devising treatments and interventions to prevent autoimmune diseases.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989226
Funder
Australian Research Council
Funding Amount
$340,000.00
Summary
Multi-photon imaging for infection, immunity, and self recognition. This proposal will address a gap in our imaging capabilities, allowing us to visualise the movement of immune cells and infectious agents such as bacteria and viruses within living tissues. This will immensely improve our capacity to understand interactions between the immune system, invading organisms and the rest of our body. The intravital imaging system will provide novel insights into how the immune system works, which will ....Multi-photon imaging for infection, immunity, and self recognition. This proposal will address a gap in our imaging capabilities, allowing us to visualise the movement of immune cells and infectious agents such as bacteria and viruses within living tissues. This will immensely improve our capacity to understand interactions between the immune system, invading organisms and the rest of our body. The intravital imaging system will provide novel insights into how the immune system works, which will benefit the design of vaccines, the treatment of cancer, and our understanding of allergy. This state-of-the-art facility will also provide vital training in an emerging technology that will have application in many areas of biology.
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Antigen Selection In The MHC-restricted Cellular Immune Response
Funder
National Health and Medical Research Council
Funding Amount
$175,570.00
Summary
The body's white cells eliminate microorganisms through the actions of immune lymphocytes and other cells which conspire to kill and neutralise these unwanted guests. When microorganisms hide inside the cells of the body they are still detected by a set of T lymphocytes which have specific receptors for scrutinising the surface of cells for any changes which might signal an intracellular infection. The immune system is ever vigilant in its search for signs of infection which are generally appare ....The body's white cells eliminate microorganisms through the actions of immune lymphocytes and other cells which conspire to kill and neutralise these unwanted guests. When microorganisms hide inside the cells of the body they are still detected by a set of T lymphocytes which have specific receptors for scrutinising the surface of cells for any changes which might signal an intracellular infection. The immune system is ever vigilant in its search for signs of infection which are generally apparent when molecules called antigens are released by microorganisms and captured by the body's cells. This activates lymphocytes resulting in an immune response capable of eliminating the microorganisms. Scrutiny of the body's cells by lymphocytes occurs continuously even when there is no infection present in the body. Following infection of a cell, microbial antigens reveal the infection by their appearance on the cell surface where they are detected by the immune system's lymphocytes. This occurs through a mechanism called antigen presentation. During antigen presentation the proteins inside the cell, including those of any invading microorganism, are first degraded into shorter molecules called peptides. This event is called antigen processing. A fraction of the peptides created by antigen processing are captured by specialised receptors present on all cells. These receptors are called HLA or histocompatibility molecules. This project examines the molecular events which mediate the capture of peptide antigens by HLA molecules. The main focus is on those peptide antigens which elicit killer T cell responses by the immune system. A knowledge of how these peptides are selected for presentation and how they are captured and carried to the cell surface is fundamental to understanding immune responses to microorganisms, tumours, allergens, transplants and self tissues as in autoimmunity. Therefore the study is of great general relevance.Read moreRead less