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Genome Maintenance And HSSB1, A Novel Player In The DNA Damage Response Pathway
Funder
National Health and Medical Research Council
Funding Amount
$646,822.00
Summary
We propose to characterize a novel player in the DNA damage response pathway. This study is expected to pave the way for the possible treatment of diseases that are caused by a nonfunctioning damage response pathway. There is an international effort to identify new proteins involved in this pathway and the funding of this proposal will provide leadership in Australia.
To Investigate The Role Of ATM Protein In Protecting Against Neurodegeneration
Funder
National Health and Medical Research Council
Funding Amount
$953,662.00
Summary
The overall aim of the project is to employ a rat model to investigate neurodegeneration in patients with ataxia-telangiectasia (A-T). Ataxia-telangiectasia is a complex multisystem disorder characterised by progressive neurological impairment, variable immunodeficiency and cancer predisposition. The rat model recapitulates the neurodegeneration in patients and thus this project will provide important insight into the nature of the defect as well as approaches for the treatment of the disorder.
Investigation Of The Role Of The ATM Protein In Peroxisome Function And Biogenesis.
Funder
National Health and Medical Research Council
Funding Amount
$250,756.00
Summary
Ataxia-telangiectasia (A-T) is a complex multisystem disease characterized by extreme sensitivity to ionizing radiation (X-rays) and susceptibility to cancer, however the most debilitating symptoms are neurodegeneration and susceptibility to bronchial infections. The gene (atm) which is mutated in this disease has recently been cloned and current research is focussed on the function of the protein (termed ATM) that this gene encodes. We have localized the ATM protein to the nucleus, where it pla ....Ataxia-telangiectasia (A-T) is a complex multisystem disease characterized by extreme sensitivity to ionizing radiation (X-rays) and susceptibility to cancer, however the most debilitating symptoms are neurodegeneration and susceptibility to bronchial infections. The gene (atm) which is mutated in this disease has recently been cloned and current research is focussed on the function of the protein (termed ATM) that this gene encodes. We have localized the ATM protein to the nucleus, where it plays a role in monitoring DNA damage, and also to vesicles in the cytoplasm of the cell. We have demonstrated that some of these vesicles are peroxisomes, vital cellular organelles involved in a wide range of metabolic functions. The importance of peroxisomes is evidenced by the severe abnormalities in patients with disorders of peroxisome formation and function. Interestingly many of the neurological features of these patients overlap with those displayed by A-T patients. We propose that abnormalities in peroxisomal function in A-T may contribute to the development of neurological symptoms and we plan to examine the function of peroxisomes in cells from A-T patients, and in tissues from A-T mutant mice. This work may help design new treatments to ameliorate the most debilitating aspects of this disease.Read moreRead less
Defective Repair Of Neuronal Activity-induced DNA Double Strand Breaks: A Novel Pathogenic Mechanism For Neurodegeneration In Ataxia-telangiectasia
Funder
National Health and Medical Research Council
Funding Amount
$570,821.00
Summary
The reason for degeneration of the hindbrain in patients with Ataxia-telangiectasia is unknown. Firing of neurons leads to breaks in the DNA that are normally repaired by ATM, the gene defective in Ataxia-telangiectasia, and failure to reset the system likely leads to abnormal gene expression and cell death. Here we use neuronal cell types derived from patient stem cells to elucidate how this novel disease mechanism may cause hindbrain degeneration and to test drugs that can overcome this.
Reprogramming Of Ataxia Telangiectasia Fibroblasts To Generate IPS Cells
Funder
National Health and Medical Research Council
Funding Amount
$601,386.00
Summary
Ataxia telangiectasia (A-T) is a human genetic disorder characterised by immunodeficiency, cancer predisposition and neurodegeneration. The aim of this project is to generate adult stem cells from A-T patient as a model system to investigate the nature of the nervous system defect in this disorder. These adult stem cells will be employed to produce neuronal cells which will be a resource for screening for therapeutic compounds to treat A-T patients.
Role Of Oxidative Stress In Activating ATM To Protect Against Neurodegeneration
Funder
National Health and Medical Research Council
Funding Amount
$570,334.00
Summary
ATM is the protein defective in the human genetic disorder ataxia-telangiectasia (A-T). This project is designed to investigate how this protein is activated by oxidative stress. The study is largely a mechanistic one, to investigate changes occurring in ATM as part of the activation process. There is evidence that ATM exists in the cytoplasm in neuronal cells and understanding its function in these cells may assist in understanding the basis for neurodegeneration in A-T.
Investigation Of Cancer Predisposition In Heterozygous Carriers Of The ATM
Funder
National Health and Medical Research Council
Funding Amount
$822,750.00
Summary
Individuals with the human genetic disorder ataxia-telangiectasia are prone to cancer development and so also are their parents and relatives (carriers) who have one defective copy of the gene. This is a multisystem disease that is also characterized by neurodegeneration, immunodeficiency, infertility and extreme sensitivity to radiation. This project is designed to generate a mouse model of this disease to investigate cancer susceptibility in carriers of the defective gene. The specific mutatio ....Individuals with the human genetic disorder ataxia-telangiectasia are prone to cancer development and so also are their parents and relatives (carriers) who have one defective copy of the gene. This is a multisystem disease that is also characterized by neurodegeneration, immunodeficiency, infertility and extreme sensitivity to radiation. This project is designed to generate a mouse model of this disease to investigate cancer susceptibility in carriers of the defective gene. The specific mutation to be introduced into the mouse has been described in a patient with breast cancer and it has been shown to interfere with the normal function of the ATM protein. The mouse model is expected to reflect closely the human disease and will provide the opportunity to monitor heterozygous carriers for the development of cancer. This model is expected to confirm the observations in humans and provide a resource to understand susceptibility to develop cancer. The model will also address the issue of exposure to low dose radiation and risk of developing cancer.Read moreRead less
The overall goal of the program is to develop novel approaches to slow the progress or prevent neurodegeneration in patients with rare human genetic disorders. The second program is designed to develop novel therapeutics from snake venom proteins. These include proteins with anti-bleeding activity and those with application in wound healing. The third program involves the development of novel biomarkers for the early detection and prognosis in prostate cancer.