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An Analysis Of The Lyn Tyrosine Kinase In The Regulation Of Hematopoiesis And Tumourigenesis.
Funder
National Health and Medical Research Council
Funding Amount
$381,000.00
Summary
The Lyn kinase is an enzyme that is involved in relaying information across the cell membrane. It is a member of a family of genes that have been implicated in tumour development. Lyn is expressed in blood cells and it is involved in a variety of immunological responses. To further our understanding of the role of this enzyme in the context of the whole animal, we have generated two strains of mice, one that is unable to make Lyn protein (Lyn-deficient mice) and one that expresses an activated f ....The Lyn kinase is an enzyme that is involved in relaying information across the cell membrane. It is a member of a family of genes that have been implicated in tumour development. Lyn is expressed in blood cells and it is involved in a variety of immunological responses. To further our understanding of the role of this enzyme in the context of the whole animal, we have generated two strains of mice, one that is unable to make Lyn protein (Lyn-deficient mice) and one that expresses an activated form of the Lyn enzyme (Lyn-up mice). Our previous studies have shown that Lyn-deficient mice have enhanced blood cell formation (hematopoiesis) and develop white blood cell tumours with age, whereas Lyn-up mice show no propensity to develop tumours. In this study we will examine in detail the role that Lyn plays in blood cell formation and tumourigenesis, and we will identify the pathways that underlie the phenotypes in Lyn-deficient mice. On completion of these studies we will have catalogued the molecules and pathways regulated by Lyn, and have an understanding of how Lyn functions in regulating development of specific populations of blood cells, and in suppressing or promoting tumour development.Read moreRead less
Erythroid Molecular Cascades Involving The Tyrosine Kinase Lyn
Funder
National Health and Medical Research Council
Funding Amount
$496,500.00
Summary
Mature red and white cells develope from hemopoietic stem cells in the adult bone marrow. The production of red blood cells is primarily controlled by the hormone erythropoietin (Epo). The availability of this hormone in a recombinant form has aided in the treatment of numerous forms of anaemia resulting from kidney failure, malignancies, and AIDS. Previously we had identified that the protein Lyn must be present inside primitive red blood cells for Epo to stimulate them to become mature functio ....Mature red and white cells develope from hemopoietic stem cells in the adult bone marrow. The production of red blood cells is primarily controlled by the hormone erythropoietin (Epo). The availability of this hormone in a recombinant form has aided in the treatment of numerous forms of anaemia resulting from kidney failure, malignancies, and AIDS. Previously we had identified that the protein Lyn must be present inside primitive red blood cells for Epo to stimulate them to become mature functional cells. Recently, we have demonstrated that mice lacking the Lyn gene develope major problems with their red blood cells. We have identified several molecules which interact with Lyn in red blood cells. We have shown that a molecule called Cbp is important for Epo function in individual red blood cells and now we plan to investigate its function in whole animals. We have shown that a new molecule called Arp is important for red blood cell development. This protein moves in and out of the nucleus (where DNA is stored) and may be important in the regulation of genes needed for red blood cells. The third gene (AFAPbeta) is also novel and is closely related to another called AFAP-110, which can exert effects on the structure of a cell. Since red blood cells have to shrink considerably during their development, the role of AFAPbeta on red blood cell structure will also be investigated. From these experiments we should develop a much better understanding of how the production of red blood cells is controlled and how diseases of red blood cells (such as anaemia) occur.Read moreRead less
The Role Of Src Family Tyrosine Kinases In Inflammatory Lung Disease And Cancer
Funder
National Health and Medical Research Council
Funding Amount
$535,333.00
Summary
We aim to learn why some people develop COPD, a serious lung disease, and adenocarcinoma, a common fatal lung cancer. COPD is mostly caused by cigarette smoke which induces lung inflammation. Lung inflammation, which involves macrophage activation, is a major cancer risk. Macrophages can destroy lung tissue, and they may promote cancer development. We will study the role of Src kinases, which can regulate macrophage activation, which may lead to new treatments for these diseases.
Trafficking Mechanisms Governing Receptor Availability For Signalling
Funder
National Health and Medical Research Council
Funding Amount
$526,978.00
Summary
Receptors on the cell surface allow cells to respond to their environment. We have recently discovered a new pathway for controlling the amount of receptors displayed on the cell surface, errors within which will lead to defects in development and diseases like cancer. We are studying how this new pathway controls the balance between how much receptors are destroyed after being activated and how much are recycled back for re-use.
An Integrated Systems Biology Approach For The Development Of New Therapeutic Strategies For The Treatment Of High Grade Glioma
Funder
National Health and Medical Research Council
Funding Amount
$696,404.00
Summary
Glioma, the most common adult brain cancer, is incurable. Recent advances now allow us to grow glioma cells directly from patients in the laboratory in a way that preserves the features of the original tumor. In this proposal we will systematically analyze such cells using state-of-the-art technologies to identify new processes important to glioma, which in turn should facilitate the identification of innovative therapeutic approaches.