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Focimatrix Regulation Of Sex Steroid Hormones In The Ovary
Funder
National Health and Medical Research Council
Funding Amount
$291,309.00
Summary
Sex steroid hormones (e.g. oestrogen and testosterone), are important to male and female health. In the ovarian follicle I identified a novel form of extracellular matrix (focimatrix) which develops in the ovary before the synthetic enzymes needed for sex steroids are present. Using evidence from other tissues, I developed ideas on how this matrix regulates the enzymes for hormone synthesis. I will examine a mechanism by which focimatrix could directly affect steroid hormone production.
Smart Synthetic Biomaterial Provides An Appropriate Microenvironment For Bone Tissue Regeneration
Funder
National Health and Medical Research Council
Funding Amount
$337,946.00
Summary
The demand for synthetic biomaterials to repair lost or diseased bone is rapidly growing and placing a major burden on national health budgets. But the synthetic scaffolds currently in use are far from optimal. My aim is to determine the underlying mechanisms by which synthetic biomaterials promote bone regeneration, in order to develop better scaffolds. This would improve health outcomes for recipients of bone graft substitutes as well as reduce individual and national healthcare costs.
Early Events In Arteriolar Remodeling: Adaptation To Prolonged Vasoconstriction
Funder
National Health and Medical Research Council
Funding Amount
$415,750.00
Summary
Small arteries, while acutely responding to their environment with changes in diameter to regulate local blood flow and pressure, also undergo structural adaptation or remodelling. These events occur over a range of time-frames and involve both non-genetically and genetically regulated events. Thus a contractile event, while initially decreasing vessel diameter, also activates longer time frame processes which can span from rearrangment of cellular junctions-contacts to overt structural changes ....Small arteries, while acutely responding to their environment with changes in diameter to regulate local blood flow and pressure, also undergo structural adaptation or remodelling. These events occur over a range of time-frames and involve both non-genetically and genetically regulated events. Thus a contractile event, while initially decreasing vessel diameter, also activates longer time frame processes which can span from rearrangment of cellular junctions-contacts to overt structural changes within the vessel wall (for example thickening of the muscle layer). These adaptive processes may enable the forces of contraction to be maintained without continued energy expenditure and damage to the vessel per se. However, they can also contribute to long-term alterations in the control of blood pressure and perhaps contribute to states of hypertension as well as other common vascular diseases. For these studies we will use arterioles, isolated by microsurgical techniques, together with sophisticated computer and video-based approaches. These techniques allow arterioles to be studied under controlled conditions and relevant biochemical measurements performed. We will also use a cell model where cultured cells will be studied after defined periods of mechanical stimulation (for example stretch). Cells will be probed using a novel microscopic technique (atomic force microscopy) which enables the cell membrane to be studied with respect to changes in composition as well as physical characteristics (for example stiffness). The studies are relevant to our understanding of the normal adaptive processes occurring within blood vessels to control blood flow and pressure. The studies are also of direct relevance to our understanding of common vascular disease states including hypertension, complications of diabetes and chronic inflammatory disorders.Read moreRead less
The Complementary Effects Of Matrilins And WARP On Chondrogenesis Through TGF-beta Signaling
Funder
National Health and Medical Research Council
Funding Amount
$327,428.00
Summary
Osteoarthritis (OA), characterized by degeneration of articular cartilage matrix structure, is one of the most common types of arthritis. Although it is known that aging is a leading factor, the exact cause of degeneration of articular cartilage is not well understood. In order to aid the discovery of treatments and diagnostic tools for this joint disease, understanding functional and mechanistic properties of cartilage specific proteins, namely matrilins and WARP, is essential.