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Insulin-like Growth Factor Binding Protein-3 (IGFBP-3) Sensitivity And Signalling In Breast Cancer
Funder
National Health and Medical Research Council
Funding Amount
$414,343.00
Summary
The growth of all tissues in the body depends on many growth factors, hormones and other proteins which work together to control cell division. Some of these factors stimulate the division of the cells which make up the body tissues, and some inhibit it, so that a balance of these stimulators and inhibitors ensures that tissues do not grow too fast, or too large. The development of breast cancer and the growth of breast tumours is thought to be due to uncontrolled or faulty actions of the protei ....The growth of all tissues in the body depends on many growth factors, hormones and other proteins which work together to control cell division. Some of these factors stimulate the division of the cells which make up the body tissues, and some inhibit it, so that a balance of these stimulators and inhibitors ensures that tissues do not grow too fast, or too large. The development of breast cancer and the growth of breast tumours is thought to be due to uncontrolled or faulty actions of the proteins and hormones which regulate the way breast cells multiply. One protein which normally regulates the division of breast cells is IGFBP-3. We have found that in some breast cancer cells, IGFBP-3 is no longer able to inhibit cell division, and this may lead to tumour growth and invasion of other tissues. We are interested in finding out how IGFBP-3 normally controls breast cell proliferation, and why some breast cancers are resistant to IGFBP-3. To do this, we will use normal breast cells in culture to examine how IGFBP-3 interacts with other cellular factors to prevent cell division. We will then look at whether the breast cancer cells have changed so that they are no longer able to recognise IGFBP-3 as an inhibitory protein. This may be because of changes in the way IGFBP-3 binds to the breast cancer cell, or because of changes in the way it interacts with other proteins in the cell. Because IGFBP-3 is made by normal and breast cancer cells, we will also study whether the IGFBP-3 being made by breast cancer cells is normal, or if it changed in some way that makes it inactive. By understanding why some breast cancers are not inhibited by IGFBP-3, we will be able to design new and better methods of preventing, detecting and treating the growth of all breast tumours.Read moreRead less
We discovered, characterised and commercialised Macrophage inhibitory cytokine-1 (MIC-1/GDF15) for human therapy. Its blood level predicts death from cancer, heart attack/stroke and other diseases. This study will add important information for understandg the actions of this important protein
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