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Genetic Variation Of Mitochondrial Complex I: Its Role In Rare And Common Diseases
Funder
National Health and Medical Research Council
Funding Amount
$628,415.00
Summary
Our bodies convert food into energy in tiny cellular power plants called mitochondria. Each year about 50 Australian children inherit disorders of mitochondrial energy generation. The most severe disorders cause infant death, while others cause degenerative diseases in later life, particularly affecting brain and muscle. In most cases we lack effective treatments. The genetic causes of mitochondrial disorders are incredibly diverse, with over 70 disease genes known. Some are located on the uniqu ....Our bodies convert food into energy in tiny cellular power plants called mitochondria. Each year about 50 Australian children inherit disorders of mitochondrial energy generation. The most severe disorders cause infant death, while others cause degenerative diseases in later life, particularly affecting brain and muscle. In most cases we lack effective treatments. The genetic causes of mitochondrial disorders are incredibly diverse, with over 70 disease genes known. Some are located on the unique mitochondrial DNA we inherit only from our mothers. Many more genes await discovery. This grant focuses on the most common energy generation disorder, known as Complex I deficiency. Complex I requires 46 separate components to be assembled together in order to work properly, but mutations in the 46 genes encoding these components only seem to explain disease in about half of all patients. Our aim is to identify new disease genes and to determine whether some patients have mutations in two different genes that interact to cause disease, rather than in a single gene. We will use a number of methods to pinpoint where in the genome the causative genes are located and then home in on the exact changes in the genes that cause disease. Identifying these genes will allow us to improve future diagnosis and prevention of mitochondrial disease. We will also generate mice in which one of the Complex I genes has been knocked out. These mice will allow us to better understand the basic disease mechanisms that link gene changes to disease. Understanding the basic biology may allow us to develop new methods of treatment. The mouse models will also be useful for trialling new treatments and for investigating the role of milder mitochondrial problems in common diseases such as diabetes and Parkinson disease. Any new treatments could potentially have wide application.Read moreRead less
Senataxin, A Novel Protein Involved In The DNA Damage Response
Funder
National Health and Medical Research Council
Funding Amount
$500,460.00
Summary
The human genome is constantly exposed to agents-chemicals that cause DNA damage. Some of these are generated during normal metabolism and are referred to as reactive oxygen species while others comprise damaging sunlight, radiation and a variety of chemical agents. These agents can lead to cancer and a range of pathologies to different tissues including deterioration of brain function. This project is designed to investigate these processes using a specific genetic disorder as a model system. T ....The human genome is constantly exposed to agents-chemicals that cause DNA damage. Some of these are generated during normal metabolism and are referred to as reactive oxygen species while others comprise damaging sunlight, radiation and a variety of chemical agents. These agents can lead to cancer and a range of pathologies to different tissues including deterioration of brain function. This project is designed to investigate these processes using a specific genetic disorder as a model system. This disorder is called ataxia with oculomotor apraxia type 2 or AOA2. This condition develops in the teenage to early twenties and as the name suggests is characterised by loss of control of gait together with difficulties of eye movement. It is due to reduced function of a particular region of the brain called the cerebellum responsible for controlling movement. We have initial data suggesting that cells from these patients are very sensitive to environmental chemicals and their capacity to carry out repair of damage to DNA is compromised. We will investigate the nature of the defect at the molecular level and establish the function of the protein defective in this syndrome. This information will be important to determining specific therapies for AOA2 patients and may also have relevance to other neurodegenerative disorders.Read moreRead less
Evolution and the immune system: genetic differences in immune response between human populations due to adaptation to living in different geo-climatic locations. The project, which investigates the genetics of inter-population differences in immune response, will lead to advances in immunology and population genetics research, explain present population specific differences in disease incidence and possibly forecast future population trends of diseases such as asthma and allergy. The study will ....Evolution and the immune system: genetic differences in immune response between human populations due to adaptation to living in different geo-climatic locations. The project, which investigates the genetics of inter-population differences in immune response, will lead to advances in immunology and population genetics research, explain present population specific differences in disease incidence and possibly forecast future population trends of diseases such as asthma and allergy. The study will strengthen ties with collaborators around the world, thus promoting excellence in Australian research and gain Australia prestige in the international community as a country that produces research of global significance. Understanding the immune system's 'recent evolutionary roots' has implications for the health of Australians, especially in light of Australia's increasingly multi-ethnic background.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE0989147
Funder
Australian Research Council
Funding Amount
$950,000.00
Summary
Advanced high throughput genomics facility for biological, medical, agricultural, environmental and evolutionary research. Infrastructure requested will expand the capacity of researchers in NSW/NT to undertake environmental, medical and evolutionary studies using state-of-the-art technologies based on the recent advances in DNA sequencing analyses. It will ensure the retention of leading researchers in the exciting areas of genomics and Systems Biology and make a significant contribution to bi ....Advanced high throughput genomics facility for biological, medical, agricultural, environmental and evolutionary research. Infrastructure requested will expand the capacity of researchers in NSW/NT to undertake environmental, medical and evolutionary studies using state-of-the-art technologies based on the recent advances in DNA sequencing analyses. It will ensure the retention of leading researchers in the exciting areas of genomics and Systems Biology and make a significant contribution to biomolecular research in medicine, agriculture and environmental biology, thereby providing major benefits to the wider community. The application will enhance existing genomic technologies by substantially increasing the scope of experiments that can be performed leading to important advances in gene discovery.Read moreRead less
CENTRE for INTEGRATIVE LEGUME RESEARCH. Legumes are essential for environmental sustainability and are important for maintaining human health. The Centre combines innovative genomic approaches to investigate the causal phenotypic links required for regulation of legume growth. The unique coexistence of multiple pluripotent meristems in shoots, roots, flowers and nodules permits the discovery of new paradigms governing legume architecture, reproductive differentiation and root-nodule developmen ....CENTRE for INTEGRATIVE LEGUME RESEARCH. Legumes are essential for environmental sustainability and are important for maintaining human health. The Centre combines innovative genomic approaches to investigate the causal phenotypic links required for regulation of legume growth. The unique coexistence of multiple pluripotent meristems in shoots, roots, flowers and nodules permits the discovery of new paradigms governing legume architecture, reproductive differentiation and root-nodule development. New knowledge of the plant growth processes through mechanistic analysis of organ induction provides the tools to optimise the legume's productivity, quality, and environment adaptation.Read moreRead less
Mouse models for the identification of factors involved in muscle adaptation. The ability of muscle to adapt to meet functional demands is essential for mobility in normal daily life, in ageing well, in individuals with muscle diseases and nerve damage and in athletes. The ability of muscle to change its cellular composition is desirable for the livestock industry. Knowledge of how genes in muscle cells are regulated to adapt to demands has significant implications for public health and economic ....Mouse models for the identification of factors involved in muscle adaptation. The ability of muscle to adapt to meet functional demands is essential for mobility in normal daily life, in ageing well, in individuals with muscle diseases and nerve damage and in athletes. The ability of muscle to change its cellular composition is desirable for the livestock industry. Knowledge of how genes in muscle cells are regulated to adapt to demands has significant implications for public health and economic benefits. We have devised model systems that will allow us to identify the regulators of these genes in order to develop therapies to combat these changes in ageing and damaged muscle, to improve the quality of meat and optimise sport performance.Read moreRead less
Regulation And Role Of Transcription At The Centromere.
Funder
National Health and Medical Research Council
Funding Amount
$737,801.00
Summary
Every human cell has 46 chromosomes. Chromosomes are structures that carry genes in all our cells. The centromere is an essential component of a chromosome. It controls the process of cell division, and it ensures the equal division of the duplicated chromosomes. Defects in centromere function can result in various genetic diseases and development of cancers. The structure of the centromere is unique and its properties are determined by an array of proteins and other as yet unknown factors that ....Every human cell has 46 chromosomes. Chromosomes are structures that carry genes in all our cells. The centromere is an essential component of a chromosome. It controls the process of cell division, and it ensures the equal division of the duplicated chromosomes. Defects in centromere function can result in various genetic diseases and development of cancers. The structure of the centromere is unique and its properties are determined by an array of proteins and other as yet unknown factors that bind to it. In our preliminary work, we have demonstrated that a novel non-protein component in the form of RNA (which are expressed products of genes) is essential for the binding of key proteins to the centromere. The presence and importance of such an RNA component has not been previously suspected and represents an exciting new mechanism that help to determine the functional and structural integrity of the centromere. In this project, we propose to study the details of this RNA and to define how this RNA-related mechanism operates to ensure the proper assembly and function of the centromere during cell division.Read moreRead less
Molecular Genetics Of The Host Response Defect In Cystic Fibrosis
Funder
National Health and Medical Research Council
Funding Amount
$564,690.00
Summary
Cystic fibrosis is the most common lethal genetic disease in Caucasian populations. Affected individuals suffer from a number of symptoms but the most serious is a chronic infect with the bacterial pathogen Pseudomonas aeruginosa. The sustained lung inflammation caused by infection with Pseudomonas aeruginosa ultimately destroys the structure of the lung to the point where it can no longer function. Gene therapy has been suggested as a possible treatment for the disease but another approach is t ....Cystic fibrosis is the most common lethal genetic disease in Caucasian populations. Affected individuals suffer from a number of symptoms but the most serious is a chronic infect with the bacterial pathogen Pseudomonas aeruginosa. The sustained lung inflammation caused by infection with Pseudomonas aeruginosa ultimately destroys the structure of the lung to the point where it can no longer function. Gene therapy has been suggested as a possible treatment for the disease but another approach is to identify the CF specific aspects of the inflammatory response and target those for therapeutic development. In our previous work we have identified several strong candidates for the inflammatory molecules in the CF lung and in this application we will test those candidates to see whether they play a major role in CF lung disease.Read moreRead less
The role of epigenetics in the early gestational programming of adult phenotype by ethanol. The concept of foetal programming is changing the way we think about the aetiology of complex disease in adults. Our studies would emphasise that adverse events during pregnancy can have long-term health implications, with concomitant social and economic consequences. In America, the prevalence of foetal alcohol syndrome is comparable with rates for Down syndrome. The Aboriginal community in Australia ....The role of epigenetics in the early gestational programming of adult phenotype by ethanol. The concept of foetal programming is changing the way we think about the aetiology of complex disease in adults. Our studies would emphasise that adverse events during pregnancy can have long-term health implications, with concomitant social and economic consequences. In America, the prevalence of foetal alcohol syndrome is comparable with rates for Down syndrome. The Aboriginal community in Australia has been identified as a high-risk group. The knowledge gained from this project could aid in the development of screening strategies to predict the likelihood of disease developing later in life, providing an opportunity for presymptomatic healthcare.Read moreRead less
Does developmental noise have an epigenetic basis? One's ultimate phenotype is the result of a combination of genotype and environment, and includes a poorly understood component termed ?developmental noise?. The molecular basis of developmental noise remains unknown, but it appears to be established in early development and to be retained for the life of the organism. We propose that the molecular basis of developmental noise is the epigenetic state of the genome. The stochastic nature of th ....Does developmental noise have an epigenetic basis? One's ultimate phenotype is the result of a combination of genotype and environment, and includes a poorly understood component termed ?developmental noise?. The molecular basis of developmental noise remains unknown, but it appears to be established in early development and to be retained for the life of the organism. We propose that the molecular basis of developmental noise is the epigenetic state of the genome. The stochastic nature of the establishment of epigenetic state, combined with its heritability during mitosis, provides all the essential components for developmental noise. If our hypothesis proves correct, our work will have a major impact on the understanding of one of the most basic concepts in genetics.Read moreRead less