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Regulating Platelet Thrombus Formation By Inhibitory Co-receptors
Funder
National Health and Medical Research Council
Funding Amount
$441,000.00
Summary
Platelets are a specialised adhesive cell essential for normal blood clotting. Following induction of blood vessel injury, platelets stick to sites of injury and activation mediate platelet spreading, aggregation and stable blood clot formation. Platelet adhesion to components of the blood vessel in flowing blood is central to blood clot formation. We are studying the role of inhibitory receptors that regulate the platelet adhesion phase on the blood vessel surface. We have knockout mice that la ....Platelets are a specialised adhesive cell essential for normal blood clotting. Following induction of blood vessel injury, platelets stick to sites of injury and activation mediate platelet spreading, aggregation and stable blood clot formation. Platelet adhesion to components of the blood vessel in flowing blood is central to blood clot formation. We are studying the role of inhibitory receptors that regulate the platelet adhesion phase on the blood vessel surface. We have knockout mice that lack a specific protein, Platelet Endothelial Cell Adhesion Molecule-1 (PECAM-1) that we can use to study its functional role in blood clot models. We are developing transgenic mice to examine the important structural domains in PECAM-1 that lead to regulation of blood clots. The knowledge gained from this work will help to improve our understanding of the regulatory processes which influence the formation of a stable blood clot. This information is relevant to many human diseases including heart attack and stroke.Read moreRead less
The Anti-thrombotic Potential Of Immunoreceptors In Platelet Thrombus Formation
Funder
National Health and Medical Research Council
Funding Amount
$522,773.00
Summary
Platelets are small cells in the blood stream that play an important role in preventing excessive blood loss at sites of tissue injury by sticking together and forming a haemostatic plug. Excessive platelet clumping in diseased blood vessels can lead to blockages and cause thrombotic diseases such as heart attack and stroke, two of the biggest killers of humans in the western world. In this proposal, we will seek to understand how immunoreceptors expressed on the surface of platelets modulate th ....Platelets are small cells in the blood stream that play an important role in preventing excessive blood loss at sites of tissue injury by sticking together and forming a haemostatic plug. Excessive platelet clumping in diseased blood vessels can lead to blockages and cause thrombotic diseases such as heart attack and stroke, two of the biggest killers of humans in the western world. In this proposal, we will seek to understand how immunoreceptors expressed on the surface of platelets modulate the function of platelet collagen interactions involving collagen GPVI receptor, the low affinity IgG receptor, FcgammaRIIa and the major platelet integrin, integrin alphaIIbbeta3. The aims of this work will define the role of these receptors in platelet aggregation both in cell-based assays and in mouse models of thrombosis. This work could lead to new strategies for therapeutic management of thrombotic disorders.Read moreRead less
Investigation Of A Novel Role For Factor XIII In Regulating The Adhesive Function Of Platelets
Funder
National Health and Medical Research Council
Funding Amount
$243,000.00
Summary
Platelets are small specialised blood cells that are extremely important for the normal formation of blood clots and for the repair of injured blood vessels. We are studying the processes that allow platelets to stick to the site of vessel injury and to each other to form stable blood clots. If this process proceeds unchecked, harmful blood clots can form which block blood vessels and cause heart attacks and strokes. There are many factors, both inside and outside platelets, which control how bi ....Platelets are small specialised blood cells that are extremely important for the normal formation of blood clots and for the repair of injured blood vessels. We are studying the processes that allow platelets to stick to the site of vessel injury and to each other to form stable blood clots. If this process proceeds unchecked, harmful blood clots can form which block blood vessels and cause heart attacks and strokes. There are many factors, both inside and outside platelets, which control how big and how fast a blood clot grows and whether it becomes harmful enough to cause a blood vessel blockage. One of these factors is the level of platelet 'stickiness' or 'reactivity'. We are working towards a better understanding of how platelet reactivity is regulated. Specifically, we believe we have identified a new factor which keeps blood clots at a size that is not harmful to cause blood vessel blockade. This information will not only increase our knowledge of blood clot formation in health and disease but also may help in the development of new therapies for the prevention of heart attack and stroke.Read moreRead less