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MECHANISMS OF MOTILITY AND METASTASIS In BREAST CANCER
Funder
National Health and Medical Research Council
Funding Amount
$209,505.00
Summary
The broad aim of this proposal is to elucidate novel molecular mechanisms of breast cancer cell motility that are relevant to metastasis or the spread of cancer. The function of two genes will be studied. We propose that (1) reduced on-random motile (ROM) regulates the speed of cancer cell movement, and (2) Neural Wiskott-Aldrich syndrome protein (N-WASP) regulates the directional component of cell movement. We will relate the function of ROM and N-WASP to rapid, linear walking along collagen fi ....The broad aim of this proposal is to elucidate novel molecular mechanisms of breast cancer cell motility that are relevant to metastasis or the spread of cancer. The function of two genes will be studied. We propose that (1) reduced on-random motile (ROM) regulates the speed of cancer cell movement, and (2) Neural Wiskott-Aldrich syndrome protein (N-WASP) regulates the directional component of cell movement. We will relate the function of ROM and N-WASP to rapid, linear walking along collagen fibres in live tumours and to breast cancer metastasis to the lung. ROM will be inhibited in breast cancer cells and we expect increases in both the speed of cell movement and metastasis. Therefore, ROM functions as a suppressor of metastasis. Inhibition of N-WASP, however, is expected to compromise both the directionality of cell movement and metastasis. N-WASP is therefore, a promoter of metastasis. At the completion of this work, the regulatory mechanisms of motility and metastasis by ROM and N-WASP will be defined. This will facilitate the development of biologically targeted agents for ROM and N-WASP that can be used to control metastasis. In addition, these agents that target the motility pathway are appropriate for use in combined therapy with agents that target a different pathway such as survival or growth. This will significantly improve disease control rates or the proportion of patients with partial or complete disease regression. This proposal addresses the National Health Priority, cancer, and related National Research Priority, ageing well and ageing productively, where in the longer term, we will be able to create new and much needed therapy for metastasis.Read moreRead less
Control Of Gastrointestinal Motility By Interstitial Cells And Neuronal Projections
Funder
National Health and Medical Research Council
Funding Amount
$845,540.00
Summary
The gastrointestinal tract moves contents along its length in an ordered manner, so allowing digestion and absorption of gut contents. These movements are controlled by the properties of the cells in the muscle layers which in part make up the wall of the gastrointestinal tract, by activity in the nerves that innervate the gut and by hormonal factors. Recently we have shown that a key part of the control system lies in a set of special cells, interstitial cells, that lie amongst the muscle cells ....The gastrointestinal tract moves contents along its length in an ordered manner, so allowing digestion and absorption of gut contents. These movements are controlled by the properties of the cells in the muscle layers which in part make up the wall of the gastrointestinal tract, by activity in the nerves that innervate the gut and by hormonal factors. Recently we have shown that a key part of the control system lies in a set of special cells, interstitial cells, that lie amongst the muscle cells. This project will determine how these cells exert their control. These cells generate large long lasting waves of voltage which flow to nearby muscle cells so causing them to contract. The first aim is to determine how the special cells generate the command signals and the second aim is to determine how the signals spread to the muscle cells. The subsequent section of the project will determine how the behavior of the cells in the gastrointestinal tract are controlled by nervous influences. Disorders of the intestine are frequent and these appear to involve disrupted muscle contraction either because the intrinsic control system is malfunctioning or because the nervous system is unable to exert its normal influence. This project will determine how the normal control system works, invariably when this has been done with other systems, disease states are easier to rectify.Read moreRead less
Prof Kamm is a gastroenterologist interested in developing improved treatments for gastrointestinal and pelvic floor disorders, such as inflammatory bowel disease and functional disorders. He runs basic science, translational and clinical strands of research in parallel across the same areas of interest, developing new treatments that encompass physiological, pharmacological, surgical and psychological therapies.
Identification And Functional Evaluation Of MicroRNAs And Their Target Genes That Regulate Breast Cancer Metastasis
Funder
National Health and Medical Research Council
Funding Amount
$607,773.00
Summary
Breast cancer is the major cause of cancer-associated death in Australian women. Once the disease has spread to other organs, as occurs in about 20% of cases, our ability to treat the disease is limited and mortality is high, leading to an enormous social and economic cost New therapies for advanced disease are needed urgently. To facilitate this, we need to understand the molecular regulation of metastasis to distant organs and use this knowledge to develop new molecular targeted therapies.
Combining PI3K, CDK4/6 Pathway Inhibitors And Immunotherapies In Triple-negative Breast Cancer (TNBC): A Novel Therapy Combination
Funder
National Health and Medical Research Council
Funding Amount
$626,345.00
Summary
Triple-negative breast cancer (TNBC) has the worst prognosis of all breast cancer subtypes, classically affecting young women and characterized by a lack of effective therapies. We show that blocking both PI3K and CDK4/6 pathways together effectively reduces TNBC growth in mice and can enhance anti-tumour immune responses. We aim to understand how these drugs work together and if adding immunotherapy can improve responses. Our project could provide a new treatment approach for TNBC patients.
Molecular Profiling Residual Disease From Early Stage HER2 Positive Breast Cancer Treated With Neoadjuvant Chemo- And Anti-HER2 Therapy
Funder
National Health and Medical Research Council
Funding Amount
$467,108.00
Summary
Chemotherapy given prior to surgery can often inform us if a breast tumour is sensitive or resistant to therapy by the amount of disease remaining at time of surgery. We have further shown that the immune response is also important in these patients. In this study we propose to analyse the tumour samples that remain after chemotherapy in order to understand possible resistance mechanisms as well as how the immunity influences survival of HER2-positive breast cancer patients
Endoscopic Diagnosis And Therapy: The Frontier Of Minimally Invasive Patient Care.
Funder
National Health and Medical Research Council
Funding Amount
$344,644.00
Summary
Minimally invasive diagnosis and treatment is a rapidly developing field, and has potential to significantly improve patient management and health care utilization. This research will apply endoscopic innovations to diagnose and treat early oesophageal and pancreatic cancer, with the aim to improve survival and quality of life. The research will also develop capacity to treat oesophageal motility disorders with minimally invasive endoscopic resection techniques.
The migration of cancer cells (metastasis) is responsible for most cancer deaths. Central to this is dynamic organisation of the actin cytoskeleton _ an internal structure that provides cell shape and enables movement. We have identified a family of small molecules (called miR-200) that regulates this actin cytoskeleton through specifically downregulating various genes. We are investigating the nature of these genes and their role in cell motility _ an underlying pre-requisite of metastasis.