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The Role Of Ikaros In Establishing Regulatory Networks For Lymphocyte Development
Funder
National Health and Medical Research Council
Funding Amount
$345,809.00
Summary
Ikaros is a protein that regulates gene expression during development of lymphocytes from blood stem cells. Ikaros has a profound importance in normal and malignant lymphocyte development, but we still do not know how it controls these processes. The aim of my study is to identify genes regulated by Ikaros and the molecular mechanisms of their regulation. This study will contribute to understanding of the regulatory network controlling the development and function of lymphocytes.
We want to understand more about the control of blood cell formation and the development of leukemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukemia, and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to take these observations further so that we can ultimately understand how a gene important in blood cell formati ....We want to understand more about the control of blood cell formation and the development of leukemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukemia, and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to take these observations further so that we can ultimately understand how a gene important in blood cell formation can also be important in causing leukemia. Here we propose to use genetic engineering approaches to generate mice in which the function of this gene is ablated or removed in a controlled and regulated fashion.Read moreRead less
Analysis Of The Hematopoietic Function Of Endophilin And MASH Proteins
Funder
National Health and Medical Research Council
Funding Amount
$408,055.00
Summary
We want to understand more about the control of blood cell formation and the development of leukaemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukaemia and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to understand how a gene important in blood cell formation can also be important in causing leukaemia. To address ....We want to understand more about the control of blood cell formation and the development of leukaemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukaemia and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to understand how a gene important in blood cell formation can also be important in causing leukaemia. To address this we will study a new molecule with which it partners, and two molecules via which it exerts its actions.Read moreRead less
We want to understand more about the control of blood cell formation and the development of leukaemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukaemia and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to take these observations further so that we can ultimately understand how a gene important in blood cell format ....We want to understand more about the control of blood cell formation and the development of leukaemia. We have discovered one gene that is very important in both these processes. It is the most common genetic abnormality involved in causing human T-cell leukaemia and we have recently shown that it is absolutely required for the development of all blood cells within an animal. We wish to take these observations further so that we can ultimately understand how a gene important in blood cell formation can also be important in causing leukaemia. To address this we will generate new models of blood cell development.Read moreRead less
Role Of The MicroRNA MiR144 In Haemopoiesis In Vivo
Funder
National Health and Medical Research Council
Funding Amount
$392,328.00
Summary
Recently a new form of gene regulation has been discovered involving small RNA molecules called microRNAs (miRNAs). Although vertebrates (like man, mouse and fish) contain many hundreds of miRNAs, the function and true gene targets of each individual miRNA are largely unknown. A better understanding the normal function and targets of miRNAs is needed so that their role in normal biology and disease development can be understood. These studies exploit the technical strengths of zebrafish, an mode ....Recently a new form of gene regulation has been discovered involving small RNA molecules called microRNAs (miRNAs). Although vertebrates (like man, mouse and fish) contain many hundreds of miRNAs, the function and true gene targets of each individual miRNA are largely unknown. A better understanding the normal function and targets of miRNAs is needed so that their role in normal biology and disease development can be understood. These studies exploit the technical strengths of zebrafish, an model of increasing importance in biomedical research, to study the function of a particular miRNA, miR144, and to identify its physiological target genes. Zebrafish have several advantages for studying miRNA function - several simple methods for experimentally altering miRNA levels are standard in zebrafish but not easy in other models like mice. miR144 has been chosen because it has an expression pattern that strongly suggests a role in blood development. Blood development and zebrafish technologies are central themes of the Lieschke laboratory. Preliminary experiments in zebrafish have shown that miR144 expression can be detected in blood cells, that it is functionally active when overexpressed, that its effect can be intercepted, and that there are blood-system effects of its misexpression, particularly in mutant zebrafish with abnormalities of blood development that provide a sensitized background for such studies. These studies will describe the expression of miR144 in detail in normal and abnormal zebrafish blood development. The effects of miR144 overexpression and knock-down of expression will be studied in detail. To identify the targets of mir144, a multifaceted microarray analysis will be performed, and the validity of candidate targets suggested by this will then be systematically tested. When finished, these studies will have characterised the physiology of this new blood regulator and identified the way it exerts its effect.Read moreRead less
The Transcriptional Regulation Of Lymphocyte And Dendritic Cell Development
Funder
National Health and Medical Research Council
Funding Amount
$596,051.00
Summary
The distinct cell types of the blood, such as red and white blood cells, are produced in the bone marrow from a rare stem cell. An important characteristic of the stem cell is its ability to balance the need to proliferate and produce the distinct cell types (termed differentiation) and the need to maintain an adequate number of stem cells in their primitive state (termed self-renewal). The outcome of this balance is the production, throughout life, of an astounding number of cells that are requ ....The distinct cell types of the blood, such as red and white blood cells, are produced in the bone marrow from a rare stem cell. An important characteristic of the stem cell is its ability to balance the need to proliferate and produce the distinct cell types (termed differentiation) and the need to maintain an adequate number of stem cells in their primitive state (termed self-renewal). The outcome of this balance is the production, throughout life, of an astounding number of cells that are required to replace those lost each day. This feat is controlled by a handful of important master-regulatory genes that act in a hierarchy to promote the differentiation process. This tightly controlled and multi-step regulation is essential, as failure to coordinate blood cell production is the underlying cause of many blood cell cancers such as leukaemia as well as immune deficiency and anaemia. This research aims to understand how these master-regulators function in isolation and together in producing the white blood cells that are required for our immune response to microbes, vaccination and to prevent cancer.Read moreRead less
The Role Of Med12, A Subunit Of RNA Polymerase II Mediator, In Haemopoiesis
Funder
National Health and Medical Research Council
Funding Amount
$495,490.00
Summary
In a screen of zebrafish for mutations in blood cell development, we isolated a mutant called syrah. The mutation causing the blood defect was identified in a gene called med12, which encodes a component of the RNA transcription machinery in cells. To understand how this mutation causes a reduction in blood cells, we will identify the proteins that interact with the med12 protein. Understanding the pathway involved may lead to the discovery of new causes of human congenital blood diseases.
Co-ordinating The Intrinsic And Extrinsic Arms Of Hematopoiesis
Funder
National Health and Medical Research Council
Funding Amount
$615,286.00
Summary
The cell types of the blood, such as red and white blood cells, are produced in the bone marrow from a rare stem cell. The stem cell uses a handfull of important master-regulatory genes that act in a hierarchy to promote the blood cell differentiation process. This research aims to understand how these master-regulators function in isolation and together in producing the white blood cells that are required for our immune response to microbes, vaccination and to prevent cancer.