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Excitation-contraction Coupling In Skeletal Muscle In Health, Exercise And Disease
Funder
National Health and Medical Research Council
Funding Amount
$623,621.00
Summary
Skeletal muscle dysfunction occurs in certain diseases, aging and exercise, and can deleteriously affect lifestyle and mobility. This project investigates the molecular mechanisms involved in the complex sequence of events that occur in each individual muscle fibre, starting from stimulation by a nerve through to the fibre contracting. This should give information about causes of skeletal muscle dysfunction in myotonia, heart failure and other situations, and help development of therapies.
Impaired Stepping As A Risk Factor For Falls In Older People
Funder
National Health and Medical Research Council
Funding Amount
$564,727.00
Summary
Stepping is often the last protective option to prevent a fall. This study will investigate stepping responses as a risk factor for falls. Complementary studies of physiological and psychological contributions to stepping will also be conducted. A path model will be used to examine the relative importance of physiological, psychological and behvioural factors. An exercise program to imrpove stepping responses will be trialed. Findings will inform future interventions for preventing falls.
A reduced capacity to recover balance following an imbalance episode contributes to the high incidence of falls in older adults. The goal of the present study is to determine how age-related differences in lower extremity neuromuscular and biomechanical properties are related to balance recovery capacity and falls incidence. A detailed understanding of this relationship is necessary for the development of efficacious exercise-based interventions for the prevention of falls.
Development Of A Novel Intervention For Training Stepping Ability To Reduce The Risk Of Falls In Older Adults.
Funder
National Health and Medical Research Council
Funding Amount
$390,393.00
Summary
Stepping is often the last protective option to prevent a fall. This study will first modify and validate an interactive system for training stepping ability in older adults. The system will be also provide the capability of acquiring indeices of stepping ability in the home. We will investigate the effect of an in-home training program using this system on stepping ability and falls risk. Findings will inform future interventions for preventing falls.
The Role Of Dysferlin In Muscular Dystrophy And Skeletal Muscle Membrane Repair.
Funder
National Health and Medical Research Council
Funding Amount
$316,667.00
Summary
Patients who lack the protein dysferlin have muscular dystrophy. These patients are unable to repair their muscle membranes, which get damaged during normal activities. A defect in membrane repair is a new pathway implicated in the muscular dystrophies, and it is likely that other patients will also have defective muscle membrane repair. We will find out how dysferlin mediates its role in membrane repair, and identify other dysferlin-interacting proteins, as these may also underlie disease.
Defining The Role Of Glycosylation In Basement Membrane Failure During Muscular Dystrophy
Funder
National Health and Medical Research Council
Funding Amount
$824,664.00
Summary
This project aims to utilize mutations within the zebrafish fkrp gene to understand the pathogenic basis of the human diseases associated with mutation of this gene which results in a spectrum of muscular dystrophies. By generating models of alleles that represent the range of phenotypes seen in humans we will have a directly translatable model system to human pathology.
Alpha-synuclein Metabolism In Human Neurodegenerative Disease
Funder
National Health and Medical Research Council
Funding Amount
$381,430.00
Summary
Alpha-synuclein is an abundant brain protein of unknown function. Gene mutations have been linked to rare cases with inherited Parkinson s disease. Now this protein is believed to play an important role in all forms of Parkinson s disease, Lewy body dementia, and multiple system atrophy. These diseases are designated as synucleinopathies to emphasize the potential importance of alpha-synuclein in these disease. Recent studies suggest alpha-synuclein may also contribute to many other human diseas ....Alpha-synuclein is an abundant brain protein of unknown function. Gene mutations have been linked to rare cases with inherited Parkinson s disease. Now this protein is believed to play an important role in all forms of Parkinson s disease, Lewy body dementia, and multiple system atrophy. These diseases are designated as synucleinopathies to emphasize the potential importance of alpha-synuclein in these disease. Recent studies suggest alpha-synuclein may also contribute to many other human diseases, including Alzheimer s disease. The reason how and why alpha-synuclein is involved in so many human neurological diseases is not clear. We recently discovered that alpha-synuclein in normal human brain exists in multiple form of N-terminal fragments, presumably generated through certain endogenous enzymes. These cleaved products are markedly increased in Parkinson s disease. Studies by other groups suggest alpha-synuclein and fragments may be released to the cerebrospinal fluids. Based on these findings, we hypothesize that alpha-synuclein is modified by specific enzymes in neurons and released. This is probably a normal alpha-synuclein metabolic pathway whose homeostasis may be, for reasons yet to be understood, altered in synucleinopathies. Similar mechanism may be also involved in other common diseases in which the protein is believed to play a role. This project aims to elucidate the potential role of alpha-synuclein metabolism in Parkinson s and related diseases by examining alpha-synuclein metabolites in the brains affected by these diseases. Results from this grant will provide new information about alpha-synuclein metabolism in neurons, new insights into the mechanistic involvement of alpha-synuclein in these neurodegenerative diseases. Antibody reagents generated from this study may be valuable in neuropathological and clinical assessment of changes in synucleinopathies.Read moreRead less
Genetic Basis For Skeletal Muscle Formation In Development And Disease.
Funder
National Health and Medical Research Council
Funding Amount
$751,854.00
Summary
Inherited skeletal dystrophies and myopathies are devastating and debilitating disease for which there are no cures and general muscle wasting is major health problem for a significant number of older Australians. Understanding how muscles form, grow and are maintained in model system, the Zebrafish, will provide avenues for treatment of these diseases. We will create models of human muscle diseases in zebrafish and test the usefulness of different therapeutic approaches we develop.
Modeling Emery-Dreifuss Muscular Dystrophy In Zebrafish
Funder
National Health and Medical Research Council
Funding Amount
$460,190.00
Summary
Emery-Dreifuss muscular dystrophy (EDMD) is a muscle degenerative disease characterised by specific muscle degeneration. Human genetic studies have identified specific genes that are mutated in patients with EDMD. We have generated zebrafish models of the most common forms of EDMD and propose to use these models to determine how mutations in these genes contributes to a lack of muscle integrity in this muscular dystrophy.