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A Solution To The Parathyroid Gland Secretion Problem
Funder
National Health and Medical Research Council
Funding Amount
$508,003.00
Summary
Parathyroid hormone is the master hormone regulator of whole body calcium metabolism and a powerful new treatment for osteoporosis but the mechanism by which its natural secretion is controlled has never been solved. In this project we will apply new insights and advanced technical approaches to resolve this most fundamental question of calcium homeostasis, namely how parathyroid hormone secretion is controlled.
Interaction Between PTH And Y2 Bone Anabolic Pathways
Funder
National Health and Medical Research Council
Funding Amount
$731,311.00
Summary
Osteoporosis is a costly condition that affects more than 150 million people worldwide and fills more hospital beds than any other disease*. People who have osteoporotic fractures experience a diminished quality of life and a reduced life expectancy. Although there are currently a number of therapies in use to reduce further loss of bone in osteoporotic patients, there is only one to replace lost bone, parathyroid hormone. For clinical and economic reasons, there is a need for additional bone-bu ....Osteoporosis is a costly condition that affects more than 150 million people worldwide and fills more hospital beds than any other disease*. People who have osteoporotic fractures experience a diminished quality of life and a reduced life expectancy. Although there are currently a number of therapies in use to reduce further loss of bone in osteoporotic patients, there is only one to replace lost bone, parathyroid hormone. For clinical and economic reasons, there is a need for additional bone-building therapies. Like all tissues, the nervous system affects skeletal function. We recently discovered a powerful control pathway by which the nervous system regulates bone formation. This project will test whether altering the function of this neural pathway can increase bone formation and whether it can work together with parathyroid hormone therapy to produce an enhanced bone formation response greater than either therapy alone. This research is important because of the need for new osteoporosis therapies to repair weakened bones. The knowledge gained from this study has the potential to provide a very important and useful contribution to skeletal health and thus aged health worldwide. *The Burden of Brittle Bones: Costing Osteoporosis in Australia. A report prepared by Access Economics Pty. Ltd. September 2001Read moreRead less
Does Teriparatide Reverse Osteonecrosis Of The Jaw In Patients With Cancer? A Randomised, Controlled Trial
Funder
National Health and Medical Research Council
Funding Amount
$357,412.00
Summary
Osteonecrosis of the jaw (ONJ) is debilitating and associated with drugs that increase bone strength and reduce the bone remodeling rate (bisphosphonates or denosumab). Up to 15% of patients with bone marrow cancer and 1 out of 952 patients with osteoporosis treated with bisphosphonates may get ONJ. This 8-week trial of subcutaneous teriparatide (a hormone that forms new bone) or placebo injections aims to promote resolution of ONJ, measured clinically and by x-ray, and improve quality of life.
Molecular Determinants Of Amino Acid-dependent Signalling By The Calcium-sensing Receptor
Funder
National Health and Medical Research Council
Funding Amount
$566,035.00
Summary
Amino acids are the building blocks of proteins and an alternative energy source to carbohydrate and fat. Proteins are major structural components of our bodies. They also fulfil an amazing diversity of cellular and bodily functions acting, for example, as enzymes (biological catalysts), receptors, molecular chaperones and biological machines. Thus, amino acids are key nutrients and the human body has developed mechanisms for tightly regulating cellular responses depending upon their levels in b ....Amino acids are the building blocks of proteins and an alternative energy source to carbohydrate and fat. Proteins are major structural components of our bodies. They also fulfil an amazing diversity of cellular and bodily functions acting, for example, as enzymes (biological catalysts), receptors, molecular chaperones and biological machines. Thus, amino acids are key nutrients and the human body has developed mechanisms for tightly regulating cellular responses depending upon their levels in blood. Identifying amino acid sensing molecules and identifying the mechanisms they use to control cellular responses is thus a key issue in human biology. The applicant identified the calcium-sensing receptor as an amino acid sensor and has shown that this receptor provides a means by which fluctuations in amino acid levels regulate the secretion of the key calcium-regulating hormone, PTH. In the current proposal, the mechanisms that link amino acid activation of the calcium-sensing receptor to its key cellular responses will be determined.Read moreRead less
The Role Of Sorting Nexin 27 In Cargo-trafficking During Skeletal Homeostasis
Funder
National Health and Medical Research Council
Funding Amount
$623,327.00
Summary
Skeletal diseases encompass a devastating set of disorders ranging from heritable skeletal dysplasia’s such as dwarfism through to degenerate diseases like osteoporosis. This research project aims to determine the role of a protein called Sorting Nexin 27 (SNX27), normally involved in the transport of intracellular cargo (e.g. growth factor receptors), in the maintenance of the skeleton and its potential contribution to the pathogenesis of skeletal disorders.