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This established team of investigators will research into the molecular control of white blood cell formation and function, using a multidisciplinary, team approach to fundamental biological questions with a focus on potential clinical and commercial outcomes. The team will also attempt to identify new validated targets for therapeutic intervention by using both forward and reverse genetic approaches in mice coupled with complete phenotypic analyses of the blood cell system.
Molecular Determinants Of Subcellular Localisation And Function Of The Transmembrane 4 Superfamily Protein, PETA-3
Funder
National Health and Medical Research Council
Funding Amount
$322,911.00
Summary
Several years ago we identified the cell membrane protein PETA-3-CD151 based on its ability to cause activation of blood platelets, suggesting a role in thrombosis. More recently we found that the protein is present in a variety of tissues, although its distribution in those tissues is often restricted. It is abundant in a variety of cancer cells, and is present on tissue mast cells that mediate allergic reactions. PETA-3-CD151 forms complexes with molecules (integrins) that are associated with ....Several years ago we identified the cell membrane protein PETA-3-CD151 based on its ability to cause activation of blood platelets, suggesting a role in thrombosis. More recently we found that the protein is present in a variety of tissues, although its distribution in those tissues is often restricted. It is abundant in a variety of cancer cells, and is present on tissue mast cells that mediate allergic reactions. PETA-3-CD151 forms complexes with molecules (integrins) that are associated with cell adhesion and migration, and antibodies to this protein inhibit cell movement. Thus PETA-3-CD151 appears to be involved in cellular interactions that are critical for normal tissue development and function, and may be involved in several disease processes including cancer invasion and metastasis. The molecular basis of PETA-3-CD151 function is not understood and is the focus of this application.Read moreRead less
Regulation Of Hedgehog Signalling Through Intracellular Trafficking Events
Funder
National Health and Medical Research Council
Funding Amount
$220,500.00
Summary
The hedgehog signalling cascade plays a role in forming almost every organ of the body during development of an embryo. Perturbation of the function of key members of this pathway during embryonic development often results in death in utero or severe childhood abnormalities. In addition, disruption to this pathway also results in a range of cancers, most notably the extremely common skin cancer basal cell carcinoma. In this proposal we aim to investigate in detail the regulatory mechanisms which ....The hedgehog signalling cascade plays a role in forming almost every organ of the body during development of an embryo. Perturbation of the function of key members of this pathway during embryonic development often results in death in utero or severe childhood abnormalities. In addition, disruption to this pathway also results in a range of cancers, most notably the extremely common skin cancer basal cell carcinoma. In this proposal we aim to investigate in detail the regulatory mechanisms which operate to ensure that this complex pathway of interacting molecules functions correctly during embryonic development. By understanding how this regulation occurs we will gain valuable insight into how disruption of this pathway results in such a range of disease, as well as into how agents which modulate this pathway may potentially act in a therapeutic setting.Read moreRead less
Molecular, genetic and cellular analysis of melanisation in human pigmentation. This investigation examines variations in the genes that determine human skin pigmentation and are likely to be associated with skin cancer risk. Our research program will form the basis of future diagnostics based on major genes that determine a persons skin type. Current skin cancer prevention strategies rely predominantly on broad spectrum campaigns that are aimed at increasing the general community awareness of ....Molecular, genetic and cellular analysis of melanisation in human pigmentation. This investigation examines variations in the genes that determine human skin pigmentation and are likely to be associated with skin cancer risk. Our research program will form the basis of future diagnostics based on major genes that determine a persons skin type. Current skin cancer prevention strategies rely predominantly on broad spectrum campaigns that are aimed at increasing the general community awareness of the damaging effects of ultraviolet (UV) radiation. A better understanding of the genetic basis of UV-sensitive skin types will greatly enhance the targeting of such skin cancer-prevention campaigns, provide an understanding of changes that occur in skin pathology, and the mechanisms of sun induced tanning.Read moreRead less
Combined genetic and cellular analysis of melanisation to study variation in human pigmentation. This investigation examines variations in the genes that are important determinants of human skin pigmentation and are likely to be associated with skin cancer risk. Our research program will form the basis of future diagnostics based on major genes that determine a persons skin type. Current skin cancer prevention strategies rely predominantly on broad spectrum campaigns that are aimed at increasi ....Combined genetic and cellular analysis of melanisation to study variation in human pigmentation. This investigation examines variations in the genes that are important determinants of human skin pigmentation and are likely to be associated with skin cancer risk. Our research program will form the basis of future diagnostics based on major genes that determine a persons skin type. Current skin cancer prevention strategies rely predominantly on broad spectrum campaigns that are aimed at increasing the general community awareness of the damaging effects of UV radiation. A better understanding of the genetic basis of UV-sensitive skin types will greatly enhance the targeting of such skin cancer-prevention campaigns, provide an understanding of changes that occur in skin pathology, and the mechanisms of sun induced tanning.Read moreRead less
Parallel genetic and cellular analysis of melanogensis: A new paradigm to study variation in pigmentation. This is the first attempt to characterise the differences in human pigmentation using a combined genetic and cellular analysis of melanogenesis. We have the ability to culture the pigmenting cells of the human epidermis and hair follicles called melanocytes from individuals of defined genotype. This will allow us to correlate mutations in melanosomal proteins with functional defects withi ....Parallel genetic and cellular analysis of melanogensis: A new paradigm to study variation in pigmentation. This is the first attempt to characterise the differences in human pigmentation using a combined genetic and cellular analysis of melanogenesis. We have the ability to culture the pigmenting cells of the human epidermis and hair follicles called melanocytes from individuals of defined genotype. This will allow us to correlate mutations in melanosomal proteins with functional defects within the cells in culture using live cell imaging, electron microscopy and biochemical analysis. This will provide a molecular basis to explain the pigmentary characteristics of individuals allowing prediction and diagnosis of their photosensitivity with important implications for skin cancer risk.Read moreRead less
The role of palmitoylation in hair follicle and epidermal stem cell biology. A proteins activity can be shaped by sugar, phosphate and lipid modifications. This proposal will investigate the effects of the lipid modification called palmitoylation, about which we know very little. Our preliminary experiments suggest that palmitoylation is crucial for normal skin biology. We will explore its effects on the biology of the proteins which are modified, the cells in which they are found and the tis ....The role of palmitoylation in hair follicle and epidermal stem cell biology. A proteins activity can be shaped by sugar, phosphate and lipid modifications. This proposal will investigate the effects of the lipid modification called palmitoylation, about which we know very little. Our preliminary experiments suggest that palmitoylation is crucial for normal skin biology. We will explore its effects on the biology of the proteins which are modified, the cells in which they are found and the tissues in which they reside. Understanding more about these modifications will help us to learn more about the biology of our skin and will help us to understand diseases which affect our largest organ.Read moreRead less
Examination of the Calcium Signalling Dynamics Linked to Integrin Adhesion Utilising a Novel Micro-imaging System. This study aims at increasing our understanding of the fundamental cell processes that allow cells to adhere to surfaces. The proposed study will lead to a greater understanding of the calcium signalling mechanisms that are fundamental to diverse biological phenomena such as, tissue regeneration and repair, blood clotting, cancer metastasis, and neuronal cell function. From a preven ....Examination of the Calcium Signalling Dynamics Linked to Integrin Adhesion Utilising a Novel Micro-imaging System. This study aims at increasing our understanding of the fundamental cell processes that allow cells to adhere to surfaces. The proposed study will lead to a greater understanding of the calcium signalling mechanisms that are fundamental to diverse biological phenomena such as, tissue regeneration and repair, blood clotting, cancer metastasis, and neuronal cell function. From a preventative health perspective, the investigation of platelet calcium signalling will greatly accelerate the development of new pharmaceuticals to tackle acute and chronic cardiovascular diseases, such as stroke, heart attack and artherosclerosis. Read moreRead less
Function and regulation of the Schlafen gene family: novel regulators of blood cell proliferation and function. The immediate outcomes of the proposed research will be in fundamental knowledge and understanding of important cellular and biological processes in which the Schlafen genes are involved. In particular, Schlafen genes are likely to play a role in inflammatory responses and in blood cell growth. These process clearly have relevance to a range of major human (and animal) diseases includ ....Function and regulation of the Schlafen gene family: novel regulators of blood cell proliferation and function. The immediate outcomes of the proposed research will be in fundamental knowledge and understanding of important cellular and biological processes in which the Schlafen genes are involved. In particular, Schlafen genes are likely to play a role in inflammatory responses and in blood cell growth. These process clearly have relevance to a range of major human (and animal) diseases including infectious disease, auto-immune disease and leukaemia, and thus a long-term outcome may be improved treatments for such disease. Read moreRead less
Identification And Characterization Of Substrates Of Tyrosine Kinases Involved In Hematopoiesis And Leukemia
Funder
National Health and Medical Research Council
Funding Amount
$241,527.00
Summary
The development and maintenance of tissues in mammals are tightly controlled and complex processes involving the growth, maturation and survival of vast numbers of cells of various types. In cancer, the cell's capacity to faithfully regulate these processes is diminished or lost. Many of the proteins that are essential for growth control are produced by an important class of genes called proto-oncogenes; literally, the prototypes of cancer-causing genes. Naturally occurring mutations in these ge ....The development and maintenance of tissues in mammals are tightly controlled and complex processes involving the growth, maturation and survival of vast numbers of cells of various types. In cancer, the cell's capacity to faithfully regulate these processes is diminished or lost. Many of the proteins that are essential for growth control are produced by an important class of genes called proto-oncogenes; literally, the prototypes of cancer-causing genes. Naturally occurring mutations in these genes have been identified in man and are likely to play a major role in the initiation and progression of distinct human malignancies. A significant number of proto-oncogenes are enzymes called protein tyrosine kinases (PTKs). Research has shown that the function of PTKs is to relay growth signals or other regulatory signals from the outer surface of the cell to specific target proteins inside the cell. These target proteins are needed to relay the signal to other target molecules and so on. This highly ordered process, involving a specific sequence of proteins, ensures that cells respond appropriately to a given signal. Our research focuses on identifying and studying the immediate targets of PTKs with the broad aim of understanding how PTKs control growth in normal and cancerous cells. We have recently developed a method that has enabled us to identify a new protein that may regulate the growth of blood cells. The research proposed here aims to extend our preliminary observations showing that the growth of specific types of blood cells is inhibited by this protein. We also plan to search for new targets of a PTK that is involved in leukemia. The findings of this research will provide important insight into how blood cells are regulated in health and disease.Read moreRead less