Gene Discovery And Pathobiology In Muscle Diseases
Funder
National Health and Medical Research Council
Funding Amount
$425,048.00
Summary
I aim to find the genetic causes of muscle diseases that are lethal or severely debilitating. These diseases result in a significant burden to the affected individuals and their families and also on Australia’s Health care system. A genetic diagnosis provides families with answers, allows family planning, such that couples do not have another affected child, enables appropriate clinical management and gives researchers evidence as to how to develop treatments.
Copper Homeostasis And APP-induced Neurodegeneration In Drosophila
Funder
National Health and Medical Research Council
Funding Amount
$381,223.00
Summary
Alzheimer s disease, a debilitating neurodegenerative disorder suffered by many of our elderly, is characterised by the presence of abnormal protein accumulations called plaques in the brains of affected patients. Plaques contain amyloid protein and also have high levels of the essential metals copper and zinc. Copper is needed for the formation of these protein aggregations and increases the toxic effects of amyloid, leading to the idea that copper-binding chemicals could be used to treat Alzhe ....Alzheimer s disease, a debilitating neurodegenerative disorder suffered by many of our elderly, is characterised by the presence of abnormal protein accumulations called plaques in the brains of affected patients. Plaques contain amyloid protein and also have high levels of the essential metals copper and zinc. Copper is needed for the formation of these protein aggregations and increases the toxic effects of amyloid, leading to the idea that copper-binding chemicals could be used to treat Alzheimer s disease. However experiments in animal models have produced conflicting results, some suggesting that increased copper levels protect against neuronal damage while others claim the opposite effect. Comparison of these studies is hampered by the different experimental systems used. We will clarify the role of copper in the progression of Alzheimer s disease using a simple insect model, the fly Drosophila melanogaster. Production of amyloid in Drosophila neuronal tissues produces a neurodegenerative effect similar to that seen in human brains, but in a matter of weeks rather than the years required in humans. We will combine production of amyloid with production of copper uptake and export proteins to investigate the effect of changing copper levels. We will also test the effect of increasing copper and other metals in the diet to see whether dietary levels are an important factor in disease progression. Finally, we will use the Drosophila model to test large numbers of metal binding compounds and drugs for ones that slow or halt the neuronal damage caused by amyloid production, identifying potential therapeutics for the treatment of Alzheimer s disease. This work will provide a vital and definitive clarification of the role of copper in the progression of Alzheimer s disease and potentially lead to the development of novel treatments for this disease that is rapidly becoming a major social and economic problem in the developed world.Read moreRead less
PArkin Co-Regulated Gene (PACRG), Parkin And Parkinsonism.
Funder
National Health and Medical Research Council
Funding Amount
$397,740.00
Summary
Parkinson's disease (PD) is a common neurodegenerative disorder affecting greater than two percent of individuals over the age of 65. The disease is characterised by tremor, slowness of movement, rigidity and postural instability. Current treatment regimes may provide some measure of symptomatic relief, but currently there is no treatment to halt or slow the progression of this debilitating disease. PD currently affects an estimated 35,000 people in Australia and this figure is predicted to incr ....Parkinson's disease (PD) is a common neurodegenerative disorder affecting greater than two percent of individuals over the age of 65. The disease is characterised by tremor, slowness of movement, rigidity and postural instability. Current treatment regimes may provide some measure of symptomatic relief, but currently there is no treatment to halt or slow the progression of this debilitating disease. PD currently affects an estimated 35,000 people in Australia and this figure is predicted to increase significantly as the population ages. PD is a complex disorder, the causes and disease mechanisms are not well understood. However, in the past 10 years several genes have been identified that can cause PD when disrupted. We have identified a new gene that we believe may be involved in PD. The overall aim of this proposal is to characterise this gene and what role it plays in the development of PD. Understanding the expression and function of this gene may significantly advance our understanding of this disorder. Using these results, we aim to model Parkinson's disease in cellular and animal systems; these may provide powerful insight into the molecular pathway(s) perturbed in PD and a means to develop novel therapeutic approaches to alleviate or prevent the disorder.Read moreRead less
The Leucine Rich Repeat Kinase 1 And 2 Genes Are Modulators Of Alternative Splicing - Implication For Neurodegeneration
Funder
National Health and Medical Research Council
Funding Amount
$583,809.00
Summary
Alzheimer's disease (AD) and Parkinson's disease (PD) are the two common causes of dementia and neurodegeneration. Through positional cloning, we have identified the leucine rich repeat kinase (LRRK1) 1 gene as a modulator of alternative splicing. We have subsequently shown that its homologue, LRRK2 has a similar biological activity. We propose to study the the genetic and biochemical role of LRRK1 and LRRK2 in neurodegeneration in terms of its effect in splicing.
Dominant Repeat Expansion Diseases - A Common RNA Mediated Pathogenic Pathway?
Funder
National Health and Medical Research Council
Funding Amount
$281,118.00
Summary
There are fourteen human genetic diseases that are caused by a similar mutation mechanism and have similar clinical outcomes - the loss of function, degeneration and eventual death of nerve cells. This group of diseases includes Huntington's Disease. They are transmitted from parent to offspring such that each child of an affected parent has 50% risk of inheriting the affected gene and therefore developing the disease. The symptoms of these diseases typically develop later in life - between the ....There are fourteen human genetic diseases that are caused by a similar mutation mechanism and have similar clinical outcomes - the loss of function, degeneration and eventual death of nerve cells. This group of diseases includes Huntington's Disease. They are transmitted from parent to offspring such that each child of an affected parent has 50% risk of inheriting the affected gene and therefore developing the disease. The symptoms of these diseases typically develop later in life - between the ages of 35 and 50 years. While the different genes for these diseases have been identified the pathways that lead from their similar form of mutation to their similar clinical outcomes are not yet understood. Some evidence suggests that certain of these diseases have a common toxic component but this component is not shared by all of the disease genes and so an additional agent that they have in common is being sought. This research will use a genetic model organism - the vinegar fly, Drosophila melanogaster, to test the identity of a good candidate (RNA) for a common toxic agent and to provide information about the pathway by which RNA leads to nerve cell degeneration and death. Accurate and complete knowledge of the identity and composition of the pathways that lead from the mutation to the disease are crucial for correct target identification in the development of drug leads.Read moreRead less
Gene Identification For Inherited Peripheral Neuropathies By Applying Next Generation Sequencing
Funder
National Health and Medical Research Council
Funding Amount
$605,058.00
Summary
Our goal is to study the biology underlying the death of motor and sensory nerves by identifying novel genes causing Charcot-Marie-Tooth (CMT) neuropathy. Using massively parallel sequencing we will systematically analyse the novel DNA changes througout the genome in CMT families in which the underlying gene mutation is unknown. Discovery of genes causing inherited peripheral neuropathies will elucidate mechanisms causing neurodegeneration and lead to targeted therapeutic treatment strategies to ....Our goal is to study the biology underlying the death of motor and sensory nerves by identifying novel genes causing Charcot-Marie-Tooth (CMT) neuropathy. Using massively parallel sequencing we will systematically analyse the novel DNA changes througout the genome in CMT families in which the underlying gene mutation is unknown. Discovery of genes causing inherited peripheral neuropathies will elucidate mechanisms causing neurodegeneration and lead to targeted therapeutic treatment strategies to prevent the death of motor and sensory nerves.Read moreRead less
Biological Characterisation Of The Opiod Receptor Sigma 1 Gene In The Frontotemporal Dementia And Motor Neuron Disease
Funder
National Health and Medical Research Council
Funding Amount
$480,211.00
Summary
Frontotemporal dementia (FTD) and motor neuron disease (MND) are the two common causes of dementia and neurodegeneration. We have identified a new genes that causes familial FTD and MND in pedigrees affected with dementia and-or MND.This project will study the expression and function of this new FTD-MND gene to determine its role in the aetiology and pathology of this complex of neurodegenerative disorders.
Identification And Characterisation Of Phenotypic Modifier Genes In Familial Alzheimer's Disease
Funder
National Health and Medical Research Council
Funding Amount
$413,250.00
Summary
Alzheimer's disease (AD) is the most common cause of dementia the fourth most common cause of death. There are no effective cures for AD and those drugs currently available are of very limited value in delaying the onset and progression of this invariably fatal disease. AD is diagnosed by two key features in the brain, dense plaques composed of the amyloid beta peptide, and tangles composed of the tau protein. The identification of new therapeutic targets, such as the enzymes which produce amylo ....Alzheimer's disease (AD) is the most common cause of dementia the fourth most common cause of death. There are no effective cures for AD and those drugs currently available are of very limited value in delaying the onset and progression of this invariably fatal disease. AD is diagnosed by two key features in the brain, dense plaques composed of the amyloid beta peptide, and tangles composed of the tau protein. The identification of new therapeutic targets, such as the enzymes which produce amyloid beta peptide, and the development of drugs that interact with these targets offers the prospect of developing treatments to delay disease onset, retard or even halt the development of this relentlessly progressive disease. Our research focuses on the genes that are involved in variant forms of AD. One neuropathological variant form we and others have described is characterised by large diffuse (cotton wool) amyloid plaques. Cotton wool plaque pathology is associated with AD causing mutations in the presenilin 1 (PS-1) gene. Another clinical AD variant that we have described is characterised by the presence of spastic paraparesis (SP). SP is associated with PS-1 mutations, but when present delays disease onset. We have identified two potential modifier genes which are likely to be directly involved in the production of cotton wool plaques or modifying the effect of PS-1 mutations and the occurence of SP. For both genes, the goal of this project is to use a range of genetic approaches to clone the modifier genes by and to assess their effects on the clinical and pathological development of AD. By studying the effects of genes which act to modify the effects of the PS-1 mutations in these variant forms of AD we hope to gain a greater understanding of how the plaques and tangles actually lead to the clinical symptoms of the disease and to gain insights into new ways in which AD may be treated.Read moreRead less