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FUNCTIONAL ANALYSIS OF IGF-BINDING PROTEIN-2 MOLECULAR INTERACTIONS IN EARLY DEVELOPMENT AND DISEASE
Funder
National Health and Medical Research Council
Funding Amount
$551,328.00
Summary
Early development involves complex regulation of cell and organ growth. Cell migration and invasion are critical components of epithelial-mesenchymal transition (EMT) essential for early developmental, as well as injury repair and cancer. Common to these events is a highly expressed protein, insulin-like growth factor binding protein-2 (IGFBP-2), which appears to play a critical role in regulating the processes of cell migration and invasion. The underlying mechanisms of cellular regulation by I ....Early development involves complex regulation of cell and organ growth. Cell migration and invasion are critical components of epithelial-mesenchymal transition (EMT) essential for early developmental, as well as injury repair and cancer. Common to these events is a highly expressed protein, insulin-like growth factor binding protein-2 (IGFBP-2), which appears to play a critical role in regulating the processes of cell migration and invasion. The underlying mechanisms of cellular regulation by IGFBP-2 are major focus of this proposal, which brings together four major groups focussed on early development, neural injury repair, and cancer biology. We will use a range of in vitro and in vivo approaches to determine the underlying mechanisms of action of this critical protein. This project has the potential to point to novel therapeutic modalities in development, repair and cancer.Read moreRead less
Insulin-like Growth Factor Binding Protein-2 Is A Crucial Activator Of Aggressive Behaviour In Cancer Cells
Funder
National Health and Medical Research Council
Funding Amount
$612,885.00
Summary
The insulin-like growth factor (IGF) system, required for normal development and adult life, is often altered in many diseases including cancer. Key regulators of the IGF system are the IGF binding protein (IGFBP) of which IGFBP-2 is the 2nd most abundant. IGFBP-2 may enhance or inhibit the IGFs, but the mechanisms are not clear. This proposal aims to dissect IGFBP-2 action with the ultimate goal to provide knowledge for the development of targeted therapeutic modulators of IGFBP-2 activity.
REGULATION OF ANDROGEN RECEPTOR And ErbB-2 GENE EXPRESSION IN PROSTATE CANCER: ROLE OF THE HU PROTEINS
Funder
National Health and Medical Research Council
Funding Amount
$471,000.00
Summary
Carcinoma of the prostate (PCa) is the most common malignancy affecting males and causes enormous morbidity and mortality in Australia. It is the second leading cause of death in men in Western countries. About one third of men relapse after radical prostatectomy because of previously undetectable metastatic disease. Androgens, acting via the androgen receptor (AR) a nuclear transcription factor that regulates a set of largely unknown androgen-responsive genes, promote the growth of prostate can ....Carcinoma of the prostate (PCa) is the most common malignancy affecting males and causes enormous morbidity and mortality in Australia. It is the second leading cause of death in men in Western countries. About one third of men relapse after radical prostatectomy because of previously undetectable metastatic disease. Androgens, acting via the androgen receptor (AR) a nuclear transcription factor that regulates a set of largely unknown androgen-responsive genes, promote the growth of prostate cancer cells. Thus the AR is a major target for therapy. Even when the disease is unresponsive to androgen withdrawal, the AR is present. Furthermore, we know that these PCa cells recruit other androgen-independent pathways to activate growth. One such pathway is the erbB-2 signaling cascade, which drives the cells towards proliferation. Proteins that bind to RNA, the cellular messenger, are playing an increasing role in the biology of cancer. HuR, a member of the Hu-Elav family, augments growth of colon cancer cells, and is associted with poor outcomes in ovarian and brain malignancies. We have recently identified the first proteins that bind to AR and erbB-2 mRNA. Remarkably, HuR binds to both sequences. Furthermore, HuD, another member of the Hu-Elav family which is normally only found in the brain, is aberrantly expressed in human PCa. In this Project we will determine the effects of these proteins on the growth of human PCa cells in culture and in whole animal models. We will also evaluate their presence in a large array of human PCa specimens. It is envisaged that this work will develop novel links between the two pathways bringing them together in a previously unrecognised manner. We also aim to solve the molecular structure of Hu proteins bound to the AR mRNA. Outcomes of the work will include new potential tests for prostate cancer and improved prognosis prediction, and establishment of a foundation for the development of novel targets for therapy.Read moreRead less