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The majority of deaths from cancer are due to metastasis, which is the formation of secondary tumours at sites remote from the primary tumour. Metastasis involves conversion of some tumour cells to an invasive, migratory form in a process that is controlled by small genetic regulators known as microRNAs. In this project we will conduct experiments aimed to provide a proof of principle demonstration in mice that microRNAs can be used to block the formation of metastases.
Inhibition Of Breast Cancer Metastasis Through Targeting Of Laminin-10 Function
Funder
National Health and Medical Research Council
Funding Amount
$391,241.00
Summary
Breast cancer affects 1 in 11 women in Australia. Whilst breast cancer is highly curable when detected early, current treatments are ineffective when the disease has spread to other organs such as bone and lungs. Thus, novel therapies for the treatment of advance disease are urgently needed. We have found that laminin-10, a protein present in the breast and thought to control normal breast development and maturation, is particularly abundant in aggressive tumours as well as in those that have sp ....Breast cancer affects 1 in 11 women in Australia. Whilst breast cancer is highly curable when detected early, current treatments are ineffective when the disease has spread to other organs such as bone and lungs. Thus, novel therapies for the treatment of advance disease are urgently needed. We have found that laminin-10, a protein present in the breast and thought to control normal breast development and maturation, is particularly abundant in aggressive tumours as well as in those that have spread to bone and lungs suggesting that this protein may play a role in the dissemination of breast cancer cells to other organs. Consistent with this, we have found that laminin-10 stimulates breast tumour cell adhesion and movement in culture, two activities required for successful metastasis of tumour cells. The overall objective of the projects is to demonstrate that breast cancer metastasis can be inhibited by interefering with the function of laminin-10. To this end, we will measure the effect of blocking the production of LN-10 in breast tumour cells on their ability to metastasise. Alternatively, we will test fragments of laminin-10 for their ability to block laminin-10-induced tumour cell growth and movement (required for their escape from the breast) and viability (required for their establishment in distant organs). We will generate antibodies against the most inhibitory fragments and test their effect on spontaneous metastasis in a clinically relevant mouse model of breast cancer metastasis in an attempt to stop-reverse the progression of the disease. If successful, this project will provide the foundation for the development novel inhibitors targeting laminin-10 for the treatment of patients with advanced breast cancer.Read moreRead less
Contribution Of Tumour And Stroma Derived Cysteine Cathepsins To Breast Cancer Metastasis To Bone
Funder
National Health and Medical Research Council
Funding Amount
$447,094.00
Summary
Breast cancer is a serious clinical problem once the disease spreads to distant tissues such as lung and bone. We have identified a group of genes called the cysteine cathepsin proteases that have increased activity in breast cancers that spread to bone and we have shown this in a mouse model and also in human cancer. We will investigate the contribution of these genes to invasion and test whether inhibiting specific cathepsins can prevent spread of breast cancer to bone in our mouse model .
Wnt-5a Signalling - A Novel Therapy For Triple Negative And Tamoxifen Resistant Breast Cancer Patients
Funder
National Health and Medical Research Council
Funding Amount
$330,534.00
Summary
Breast cancer is the most common cancer in women. Commonly used drugs target the estrogen receptor (ER). However, one third of breast cancer patients lack ER, and do not respond to treatment. Cancers that lack ER also lack a gene called Wnt5a, which is linked to better prognosis. We have shown that fixing Wnt5a can restore ER allowing cells to respond to Tamoxifen. We would now test this in animals, in the hope of developing a new drug for breast cancer patients currently with limited options.
Regulatory Mechanisms Of Antibody Cytotoxicity For Cancer Therapy
Funder
National Health and Medical Research Council
Funding Amount
$566,087.00
Summary
Use of antibodies for cancer therapy, where a protein is made in the laboratory to recognize and act on cancer cells that have a target antigen, has emerged as an important therapeutic area in oncology. The lewis-y (Ley) antigen is found in over 70% of epithelial cancers. We have developed an antibody against Ley (hu3S193) which can target cancer cells. Our research is aimed at developing optimal cancer cell killing by our anti-Ley antibody.