Molecular Targeted Therapy In Childhood Neuroblastoma Based On Inhibition Of The N-myc Oncogene
Funder
National Health and Medical Research Council
Funding Amount
$434,250.00
Summary
Neuroblastoma is a common cancer of young children which, despite the use of powerful anticancer drugs that cure other childhood cancers, has only a 40% survival rate. Many laboratories have shown that the most aggressive neuroblastoma tumours, which are most resistant to the action of anticancer drugs, have an abnormal number of copies of a cancer-associated gene, called N-myc. Patients whose tumours have multiple N-myc copies have dismal survival prospects, and new treatments for such patients ....Neuroblastoma is a common cancer of young children which, despite the use of powerful anticancer drugs that cure other childhood cancers, has only a 40% survival rate. Many laboratories have shown that the most aggressive neuroblastoma tumours, which are most resistant to the action of anticancer drugs, have an abnormal number of copies of a cancer-associated gene, called N-myc. Patients whose tumours have multiple N-myc copies have dismal survival prospects, and new treatments for such patients are urgently needed. Several studies, using models of neuroblastoma cells growing in the laboratory, have shown that it is possible to create small fragments of genetic material which can specifically switch off the N-myc gene. When this happens, the neuroblastoma cells behave in a less aggressive and malignant way. We have recently shown that these genetic fragments are capable of reducing the growth of tumours in mice which have been genetically manipulated to develop neuroblastoma. We now want to develop new and improved ways of switching off N-myc and inhibiting neuroblastoma development because these approaches may be extremely valuable for treating neuroblastoma in patients. These approaches include the use of new types of genetic fragments (siRNA) as well as small chemical molecules capable of specific N-myc inhibition.Read moreRead less
Mechanisms Of Action Of The Zinc Finger Protein LMO4 In Breast Oncogenesis
Funder
National Health and Medical Research Council
Funding Amount
$272,859.00
Summary
Breast cancer is the most common cancer to strike Australian women, affecting one in 12 women by age 75. Although treatment of breast cancer has substanially improved over the last few years, approximately 25% of women diagnosed with this cancer will die from the disease. A major objective of cancer research is the identification of genes involved in tumour development and definition of their precise role in both normal and cancer cells. The design of new effective therapeutic inhibitors of canc ....Breast cancer is the most common cancer to strike Australian women, affecting one in 12 women by age 75. Although treatment of breast cancer has substanially improved over the last few years, approximately 25% of women diagnosed with this cancer will die from the disease. A major objective of cancer research is the identification of genes involved in tumour development and definition of their precise role in both normal and cancer cells. The design of new effective therapeutic inhibitors of cancer requires an understanding of the basic molecular and cellular biology behind the genetic changes that contribute to cancer. The focus of our research is to understand normal cellular mechanisms that drive growth and differentiation of breast tissue, and those changes that lead to breast cancer. We are particularly interested in 'master regulators' that are located in the cell nucleus. Nuclear regulators have been implicated in many different types of cancer and leukaemias. We aim to identify the key regulators in breast tissue, characterising both their biological roles and mechanism of action, with the ultimate view of understanding how they divert a normal cell to a cancerous cell. This proposal centres on the characterisation of a specific nuclear regulatory molecule, LMO4, which we have demonstrated to be overexpressed in 56% of human primary breast cancers. Significantly, we have recently shown that overexpression of LMO4 predicts poor outcome in breast cancer patients. We have also shown that this protein interacts with the breast tumour suppressor protein BRCA1, as well as a number of other proteins. These studies will include defining LMO4 s role in governing cell growth in breast cancer cells and that of the proteins that bind to this regulator. We will also assess the role of LMO4 in controlling cell invasion and metastasis of breast cancer cells in mouse models since we have preliminary evidence that it may be a critical regulator of these processes.Read moreRead less
Identification Of Oncogenes From Myeloid Leukaemias By Retroviral Expression Cloning
Funder
National Health and Medical Research Council
Funding Amount
$552,000.00
Summary
The success rates for treatment of most myeloid leukaemias remain relatively poor, with 5-year survival rates of 40-50% overall. Thus there is a clear need for improvements in diagnosis and particularly treatment. An important and relatively new approach for doing this is to target the specific molecular and genetic alterations that lead to these diseases. This requires the identification of these alterations, particularly the oncogenes ('cancer genes') that cause or contribute to the various fo ....The success rates for treatment of most myeloid leukaemias remain relatively poor, with 5-year survival rates of 40-50% overall. Thus there is a clear need for improvements in diagnosis and particularly treatment. An important and relatively new approach for doing this is to target the specific molecular and genetic alterations that lead to these diseases. This requires the identification of these alterations, particularly the oncogenes ('cancer genes') that cause or contribute to the various forms of myeloid leukaemia. However in many cases (up to 50%), the key oncogenes involved in have not and-or cannot be identified using current methods. This project aims to develop and apply a powerful technique called 'retroviral expression cloning' for the identification of oncogenes involved in myeloid leukaemia. In essence our approach is to identify oncogenes from myeloid leukaemia samples on the basis of their function - that is, by virtue of their ability to induce dysregulated or uncontrolled growth of blood-derived cells in culture.Read moreRead less