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Identification Of Critical Regulatory Elements In The BRCA1 Gene
Funder
National Health and Medical Research Council
Funding Amount
$227,036.00
Summary
Breast cancer affects approximately one in ten women and is therefore a major health problem. In order to improve the diagnosis, treatment and prognosis of this disease, it is critical to understand the molecular defects that contribute to disease initiation and progression. Over the last twenty years significant progress has been made in this regard, however there still remain a considerable number of unanswered questions. For example, it is not yet clear precisely what contribution each of the ....Breast cancer affects approximately one in ten women and is therefore a major health problem. In order to improve the diagnosis, treatment and prognosis of this disease, it is critical to understand the molecular defects that contribute to disease initiation and progression. Over the last twenty years significant progress has been made in this regard, however there still remain a considerable number of unanswered questions. For example, it is not yet clear precisely what contribution each of these genes makes. This is largely due to limitations in current mutation detection strategies and an incomplete understanding of all of the genetic elements for which disruption can lead to loss of gene function. This propsal aims to identify all of the genetic elements critical for the expression of an important breast cancer gene called BRCA1. Furthermore, it aims to determine the status of these elements in breast cancer patients, thus expanding our knowledge of the actual contribution disruption of this gene makes to this disease.Read moreRead less
Analysis Of Very Early Cancer-related Methylation Abnomalities
Funder
National Health and Medical Research Council
Funding Amount
$422,310.00
Summary
The factors that are involved in triggering cancer are still unknown. Increasing evidence however indicates that the DNA in the pre-cancer cell becomes modified leading to altered expression of important genes called tumour suppressor genes. Often the DNA is deleted or mutated but it can also become chemically changed by a process called DNA methylation. We have found that an important tumour suppressor gene called p16 is inactivated and chemically methylated in breast epithelial cells at the st ....The factors that are involved in triggering cancer are still unknown. Increasing evidence however indicates that the DNA in the pre-cancer cell becomes modified leading to altered expression of important genes called tumour suppressor genes. Often the DNA is deleted or mutated but it can also become chemically changed by a process called DNA methylation. We have found that an important tumour suppressor gene called p16 is inactivated and chemically methylated in breast epithelial cells at the stage when the cell changes to a pre-cancer cell. This grant is aimed at finding what triggers the silencing and methylation of the p16 gene in this early pre-cancer stage. We also plan to identify other genes are methylated and undergo inactivation the pre-cancer breast cells. These results will have an impact on understanding the molecular mechanism that makes a breast cell susceptible to cancer and may lead to insights into new prevention and treatment strategies.Read moreRead less
Regulation Of Tissue-type Plasminogen Activator Gene Expression In Endothelial Cells And In Transgenic Mice
Funder
National Health and Medical Research Council
Funding Amount
$244,009.00
Summary
Tissue-type plasminogen activator (t-PA) is an enzyme which plays an important role in the removal of blood clots from the circulation. One of the major sites of production of t-PA are endothelial cells which line the blood vessel wall. The rate of t-PA production is greatly influenced by factors released from other cells. One of these factors is tumour necrosis factor (TNF). The t-PA gene is switched off in endothelial cells exposed to TNF. One of the aims of this project is to understand how t ....Tissue-type plasminogen activator (t-PA) is an enzyme which plays an important role in the removal of blood clots from the circulation. One of the major sites of production of t-PA are endothelial cells which line the blood vessel wall. The rate of t-PA production is greatly influenced by factors released from other cells. One of these factors is tumour necrosis factor (TNF). The t-PA gene is switched off in endothelial cells exposed to TNF. One of the aims of this project is to understand how the t-PA gene is suppressed by TNF in human endothelial cells and in transgenic mice. The transgenic mice we have available express the regulatory region of the t-PA gene (called the gene promoter) connected to a reporter gene called LacZ. We will use these animals to visualise the expression pattern of LacZ expression under normal conditions and in mice treated with TNF. The results of these experiments will provide new information as to how the t-PA gene is controlled in cells and in the body.Read moreRead less
Genomic Characterisation Of Asbestos Related Lung Cancer
Funder
National Health and Medical Research Council
Funding Amount
$88,099.00
Summary
Lung cancer causes more deaths in Australia than any other cancer. Smoking is the main cause, but people exposed to asbestos are also at risk, and it can be difficult to know whether a case is due to tobacco, asbestos or both. We will study lung cancer genes in people with asbestos exposure to find whether asbestos lung cancer has a specific pattern of abnormal genes (signature). If so, this could help people entitled to compensation, and also point to new treatments for asbestos lung cancer
Retrotransposon Regulation Of The Human Innate Immune Response
Funder
National Health and Medical Research Council
Funding Amount
$231,937.00
Summary
Complete sequencing of the human genome has revealed the positions of approximately 20,000 genes. In addition, nearly 50% of the human genome is comprised of repetitive sequences previously thought of as junk DNA. Numerous studies are now finding that this DNA actually has a variety of important functions, particularly in the control of gene activity. This project will examine the relationships between gene expression and nearby repetitive sequences during the innate immune response in humans.
STUDIES OF NF-E4, A NOVEL FETAL/ERYTHROID SPECIFIC FACTOR INVOLVED IN FETAL GLOBIN GENE REGULATION
Funder
National Health and Medical Research Council
Funding Amount
$753,810.00
Summary
Sickle cell anemia and thalassemia are the commonest genetic disorders worldwide. Those affected suffer devastating clinical sequelae and mortality in the first twenty years of life remains high. A cure for these diseases is dependent on the replacement of the affected or absent hemoglobin protein chains with normally functioning hemoglobins. This is evident in rare patients who co-inherit a natural mutation which elevates fetal hemoglobin (HbF), as these patients have a dramatically ameliorated ....Sickle cell anemia and thalassemia are the commonest genetic disorders worldwide. Those affected suffer devastating clinical sequelae and mortality in the first twenty years of life remains high. A cure for these diseases is dependent on the replacement of the affected or absent hemoglobin protein chains with normally functioning hemoglobins. This is evident in rare patients who co-inherit a natural mutation which elevates fetal hemoglobin (HbF), as these patients have a dramatically ameliorated clinical course. Therefore, treatment strategies which could reactivate fetal globin gene expression after birth should be explored for these diseases. To achieve this goal we must further our understanding of the normal mechanisms of developmental regulation of globin gene expression. To this end we have recently identified a novel gene which is critical for fetal globin expression. The studies we propose here will further define the function of this gene and assess its potential for gene therapy for sickle cell disease and thalassemia.Read moreRead less
A Structural And Functional Basis For The Regulation Of Gene Expression By Nuclear Retention Of RNA
Funder
National Health and Medical Research Council
Funding Amount
$504,097.00
Summary
The nuclear retention mechanism is a novel way used by cells to control which genes are made into proteins - a fundamental process for all diseases, particularly cancers. This project will employ cutting edge structural and proteomic techniques to determine the molecular details underpinning nuclear retention. These insights will be important for the development of new tissue-restricted gene therapy applications and drugs targeting the cancers that rely on this mechanism.