I am an Immunologist interested in the role of B-lymphocytes, their survival and expression of a novel chemoreceptor in Autoimmunity. I also study the important role of Neuropeptide Y in modulating key immune functions.
The establishment of an immune system that is able to distinguish between self and non-self is of fundamental importance for good health and survival. How this specificity is achieved has been an area of intense investigation for many years because a breakdown of this process leads to the development of autoimmune diseases, such as diabetes, or an inability to fight pathogenic organisms. It has been known for many years that the development T cells, a subset of cells involved in mounting immune ....The establishment of an immune system that is able to distinguish between self and non-self is of fundamental importance for good health and survival. How this specificity is achieved has been an area of intense investigation for many years because a breakdown of this process leads to the development of autoimmune diseases, such as diabetes, or an inability to fight pathogenic organisms. It has been known for many years that the development T cells, a subset of cells involved in mounting immune responses, occurs in the thymus. The thymus produces large numbers of immature T cells (called thymocytes) from which a small number receive the appropriate signals to survive and develop into mature T cells. These tailor-made T cells can then enter the blood and peripheral lymphoid organs where they fight infectious organisms without reacting against host (i.e. self) tissues. The work for this project is aimed at determining how proteins inside thymocytes transmit signals that determine whether thymocytes either survive, and develop into T cells, or are eliminated because they react too strongly with self proteins. We have established that a protein called c-Cbl is central to this process as it regulates the initial strength of the signal that determines the fate of thymocytes. Our aim is to identify the putative key protein regulated by c-Cbl that can sense when a signal is too strong following the binding of a thymocyte to a self protein and directs a cell death signalling response. From this critical point of signal splitting we also aim to identify proteins that relay the death signal to the nucleus where they trigger the production of well-characterised proteins required to mediate cell death. By identifying the proteins in this signalling pathway we will have a greater capacity to control the magnitude of immune responses and therefore be able to lessen tissue damage caused by autoimmune reactions.Read moreRead less
The Function Of Histidine-rich Glycoprotein In Inflammation And Cancer
Funder
National Health and Medical Research Council
Funding Amount
$455,670.00
Summary
This research proposal investiagtes the role of a molecule known as histidine-rich glycoprotein (HRG) in the important diseases of cancer and inflammation. Inflammatory diseases can occur when the the normal checks on the immune system breakdown resulting in attacks on the body leading to tissue damage (e.g rheumatoid arthritis) and are significant contributors to morbidity and health costs in Australia. Cancer is the leading cause of death in Australia (28.4% of deaths in 2003). HRG has been im ....This research proposal investiagtes the role of a molecule known as histidine-rich glycoprotein (HRG) in the important diseases of cancer and inflammation. Inflammatory diseases can occur when the the normal checks on the immune system breakdown resulting in attacks on the body leading to tissue damage (e.g rheumatoid arthritis) and are significant contributors to morbidity and health costs in Australia. Cancer is the leading cause of death in Australia (28.4% of deaths in 2003). HRG has been implicated in controlling important aspects of inflammatory and cancer disease progression. Namely, HRG appears to regulate the formation and clearance of substances known as immune complexes - the primary cause of tissue damage in this disease. Furthermore, HRG may also control the process of cell invasion which is crucial for the migration of white blood cells of the immune system (leukocytes) to sites of inflammation to combat infections, and is also an important mechanism by which malignant tumour cells escape from primary tumour sites and spread throughout the circulation to other sites in the body. It is this process that makes cancer such a deadly disease. This study aims to define how HRG contributes to these important processes. This information may allow the development of new therapeutic approaches for the treatment of inflammatory diseases and cancer.Read moreRead less