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Investigating Tumour Development And Metastasis Using A Novel Drosophila Cancer Model.
Funder
National Health and Medical Research Council
Funding Amount
$505,500.00
Summary
The majority of cancers are derived from epithelial cells. The primary cause of cancer related deaths is due to the ability of these epithelial cancer cells to migrate and invade other tissues within the body away from their primary tissue of origin (metastasise). This proposal seeks to understand the pathways that are important in regulating the processes of epithelial cell migration and invasion that are instrumental in promoting the metastatic spread of tumour cells. As controls usually opera ....The majority of cancers are derived from epithelial cells. The primary cause of cancer related deaths is due to the ability of these epithelial cancer cells to migrate and invade other tissues within the body away from their primary tissue of origin (metastasise). This proposal seeks to understand the pathways that are important in regulating the processes of epithelial cell migration and invasion that are instrumental in promoting the metastatic spread of tumour cells. As controls usually operate to induce cell death in any cell that attempts to break away and invade other tissues, this proposal also seeks to understand some of the pathways that are responsible for causing these cells to die. To carry out these investigations we have developed a novel Drosophila model of epithelial cancer development. We use this model because of the ease with which it is possible to carry out complex genetic analyses and so dissect the roles of the many different signalling pathways involved in these processes. The strength of the model is that it is dependent upon genetic alterations that are also implicated in the development and metastatic spread of many mammalian cancers, namely activating mutations in two genes, Ras and Notch. It is expected, therefore, to offer considerable insight into why these activated genes also cause the spread of cancer cells in humans.Read moreRead less
While most leukemia patients initially respond well to chemotherapy, >60% die because the disease returns as a result of the survival of leukaemia cells following treatment. We have identified a new protein, osteopontin (OPN), that may allow the survival of leukaemia cells and therefore reduce the ability of chemotherapy to erradicate disease. We seek to examine the role of OPN in leukemia with a view toward developing targetted therapies in the future.
Regulation Of Cell Death, Cell Survival And Ubiquitination In Normal Physiology And Disease
Funder
National Health and Medical Research Council
Funding Amount
$823,008.00
Summary
I am a cellular and molecular biologist with extensive training in a number of biomedical research areas. For over 20 years I have used my training and skills to understand the normal functioning of the body and what molecular and cellular changes underlie various diseases. This fellowship will allow me to continue the groundbreaking work we have been doing to explore the function of several proteins in diseases such as cancer, hypertension, lung inflammation and anaemia.
Cell death by a special process called apoptosis is a means of deleting unwanted and harmful cells from the body. Extensive apoptosis occurs during foetal development which is required to get rid of many excess cells produced during the growth of the embryo. Selective apoptosis is also essential for the formation of different tissues and organs in developing foetus. In the adult, apoptosis is required for proper functioning of the immune system, to remove virus infected and cancer cells and, in ....Cell death by a special process called apoptosis is a means of deleting unwanted and harmful cells from the body. Extensive apoptosis occurs during foetal development which is required to get rid of many excess cells produced during the growth of the embryo. Selective apoptosis is also essential for the formation of different tissues and organs in developing foetus. In the adult, apoptosis is required for proper functioning of the immune system, to remove virus infected and cancer cells and, in general, to maintain the correct number of cells in the body. As such, misregulation of apoptosis is associated with the pathogenesis of a wide array of diseases. To understand, manage and treat disorders that result from aberrant apoptosis, we need to know at molecular and cellular level, how apoptosis is brought about and how it is regulated. We have been studying these processes in detail for several years. Central to the apoptotic execution of cell death are a group of proteases called caspases, that target many cellular proteins for specific cleavage. The activation of caspases is the crucial step in the initiation of apoptosis and therefore each cell has developed complex ways to control this process. If we understand how these regulatory mechanisms operate, we can then formulate strategies that are targeted towards pathologies involving abnormal apoptosis. In this proposal we will use vinegar fly as a model to study the function of caspases in development. We believe that results from this proposal will have several major benefits. Firstly, they will provide important insight into the mechanisms of developmental apoptosis thereby filling many gaps in our current knowledge. Secondly, the study will endeavour to identify new molecules-pathways that lead to caspase activation. Finally, the proposed studies will shed light on the function of caspases in non-apoptotic pathways.Read moreRead less
Cell death by a specialised process known apoptosis is a way of deleting unwanted and harmful cells from the body. As such, aberrant apoptosis is associated with a wide array of diseases including cancer. For example, abnormal levels of proteins that suppress apoptosis or enhance cell survival can result in cancer and often produce resistance to chemotherapy. To understand and treat cancers that result from aberrant apoptosis we need to know at a molecular level how apoptosis is regulated. Centr ....Cell death by a specialised process known apoptosis is a way of deleting unwanted and harmful cells from the body. As such, aberrant apoptosis is associated with a wide array of diseases including cancer. For example, abnormal levels of proteins that suppress apoptosis or enhance cell survival can result in cancer and often produce resistance to chemotherapy. To understand and treat cancers that result from aberrant apoptosis we need to know at a molecular level how apoptosis is regulated. Central to the apoptosis execution are a group of enzymes called caspases that target many cellular proteins for specific cleavage. In this proposal, we will investigate the function of one of the caspases (called caspase-2), in order to better understand its potential role in the apoptosis of cancer cells. A number of recent reports suggest that caspase-2 levels are reduced in many cancer cells. The human caspase-2 gene localizes to a chromosomal region frequently affected- deleted in leukaemia, and caspase-2 levels have been proposed to be predictors of remission and survival in patients with some types of leukaemia. We will study if loss of caspase-2 in cancer cells makes them resistant to killing by drugs and if mice lacking caspase-2 have an increased potential to develop cancer. Understanding caspase-2 function and its regulation is likely to provide new therapeutic opportunities and potential targets for cancer therapy.Read moreRead less
Apoptosis And Autophagy In Developmentally Programmed Cell Death
Funder
National Health and Medical Research Council
Funding Amount
$502,437.00
Summary
Cell death is essential for sculpting tissues and organs in developing foetus and deregulated cell death results in many diseases. To treat disorders that result from aberrant cell death, we need to understand the control of cell death during development. We will use a vinegar fly model to study cell death modalities in development. By doing this we hope to uncover new knowledge important for human biology and identify new molecules that may be important for understanding and treating disease.
Australian Drosophila Biomedical Research Support Facility
Funder
National Health and Medical Research Council
Funding Amount
$1,008,895.00
Summary
Breakthroughs in biomedical research frequently come from the study of model organisms, one of the most important of which is the vinegar fly, Drosophila melanogaster. In Australia, Drosophila is used in biomedical research with a particular focus on understanding processes that result in human cancer or are associated with birth defects or inherited diseases. Drosophila-based research is funded by bodies such as the Anti-Cancer Foundation, the National Health and Medical Research Council (NH an ....Breakthroughs in biomedical research frequently come from the study of model organisms, one of the most important of which is the vinegar fly, Drosophila melanogaster. In Australia, Drosophila is used in biomedical research with a particular focus on understanding processes that result in human cancer or are associated with birth defects or inherited diseases. Drosophila-based research is funded by bodies such as the Anti-Cancer Foundation, the National Health and Medical Research Council (NH and MRC) and the National Institutes of Health of the USA. This proposal seeks to establish infrastructure support for Drosophila research in the form of a central collection of key research stocks, a centralized facility for the importation of genetically defined stocks and a facility for the generation of transgenic Drosophila for use in biomedical research.Read moreRead less