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Role Of Cyclin E2 In Hormone-responsive Breast Cancer
Funder
National Health and Medical Research Council
Funding Amount
$328,194.00
Summary
The female hormone estrogen stimulates the growth of breast cancers by promoting cell reproduction. We have found that cyclin E2, which is part of the machinery that controls cell reproduction, responds to estrogen. Since abnormally high levels of cyclin E2 are linked with earlier relapse in breast cancer, we wish to understand what role it plays in estrogen action and in breast cancer, how its levels are controlled, and whether too much cyclin E2 interferes with drugs that block estrogen action
Isolation And Characterisation Of Mouse Mammary Stem And Progenitor Cells
Funder
National Health and Medical Research Council
Funding Amount
$540,202.00
Summary
We have discovered the rare adult stem cell from which all breast epithelial tissue is formed. A single stem cell was found to be capable of giving rise to various cell types in the breast, including the secretory units that produce milk and the ductal cells that transmit milk to the nipple. These cell types are responsible for the majority of human breast tumours. However, the precise 'cell of origin' from which cancers ultimately develop is not known. We recently also found that the stem cell ....We have discovered the rare adult stem cell from which all breast epithelial tissue is formed. A single stem cell was found to be capable of giving rise to various cell types in the breast, including the secretory units that produce milk and the ductal cells that transmit milk to the nipple. These cell types are responsible for the majority of human breast tumours. However, the precise 'cell of origin' from which cancers ultimately develop is not known. We recently also found that the stem cell population is expanded in at least one model of mammary tumours, suggesting that some tumours may arise from the breast stem cell itself. Using mouse models and cellular assays, our aim is to characterise, for the first time, the hierarchy of stem, progenitor ('daughter cells') and mature cells in the mammary gland. These studies will provide insight into the various cell types that give rise to different types of breast cancer. An important evolving concept in cancer biology is that a rare population of cells resident within a tumour, termed 'cancer stem cells', have indefinite growth potential and drive tumour growth. These cells could even account for resistance to conventional anti-cancer treatment, as cells with stem cell-like properties would be able to proliferate extensively and form new tumours. We will apply our knowledge of normal mammary stem cells to determine whether cancer stem cells are indeed present in mouse tumours. Those findings will have direct relevance to human breast cancer. Utlimately, we wish to identify specific cell surface proteins on stem and precursor cells that could provide therapeutic targets. Our studies will provide new insights into the cell types from which breast cancer arise, and how their fate and tumour-forming capacity can be modified by altering gene expression. Delineation of cancer-prone cells and cancer stem cells could reveal new markers and provide new therapeutic strategies to target breast cancer.Read moreRead less
Analysis Of Very Early Cancer-related Methylation Abnomalities
Funder
National Health and Medical Research Council
Funding Amount
$422,310.00
Summary
The factors that are involved in triggering cancer are still unknown. Increasing evidence however indicates that the DNA in the pre-cancer cell becomes modified leading to altered expression of important genes called tumour suppressor genes. Often the DNA is deleted or mutated but it can also become chemically changed by a process called DNA methylation. We have found that an important tumour suppressor gene called p16 is inactivated and chemically methylated in breast epithelial cells at the st ....The factors that are involved in triggering cancer are still unknown. Increasing evidence however indicates that the DNA in the pre-cancer cell becomes modified leading to altered expression of important genes called tumour suppressor genes. Often the DNA is deleted or mutated but it can also become chemically changed by a process called DNA methylation. We have found that an important tumour suppressor gene called p16 is inactivated and chemically methylated in breast epithelial cells at the stage when the cell changes to a pre-cancer cell. This grant is aimed at finding what triggers the silencing and methylation of the p16 gene in this early pre-cancer stage. We also plan to identify other genes are methylated and undergo inactivation the pre-cancer breast cells. These results will have an impact on understanding the molecular mechanism that makes a breast cell susceptible to cancer and may lead to insights into new prevention and treatment strategies.Read moreRead less
High Resolution Genome-wide Genomic Analysis Of DCIS To Identify Genes Involved In Disease Initiation And Progression
Funder
National Health and Medical Research Council
Funding Amount
$543,370.00
Summary
DCIS is the most common type of noninvasive breast cancer and in some women may progress to malignant disease but little in know about how it develops. We will bring to bear our experience with cutting edge technology and access to extensive clinical resources to the analysis of a large series of pure DCIS with the aim of identifying previously unknown cancer causing genes. This data will lead to the identification of novel breast cancer genes that will assist clinical management.
KConFaB - A CONSORTIUM FOR RESEARCH ON FAMILIAL BREAST CANCER
Funder
National Health and Medical Research Council
Funding Amount
$1,624,711.00
Summary
Breast cancer is the most common disease of women. In families with an inherited form of breast cancer, nearly half the women in every generation can develop the disease. The aim of this Australia-wide study is to collect clinical, epidemiological and genetic data on approximately 700 of these severely-affected families. This national resource will be of great value for researchers who want to identify and characterize the genetic and life-style factors that affect the onset and progression of t ....Breast cancer is the most common disease of women. In families with an inherited form of breast cancer, nearly half the women in every generation can develop the disease. The aim of this Australia-wide study is to collect clinical, epidemiological and genetic data on approximately 700 of these severely-affected families. This national resource will be of great value for researchers who want to identify and characterize the genetic and life-style factors that affect the onset and progression of the disease. The data emerging from the study will lead to more accurate genetic counselling, better surveillance and, ultimately, better methods to prevent and treat the disease in families who inherit a predisposition to the disease.Read moreRead less
Incidence And Prognosis Of Metastatic Breast Cancer: A Population-based Data Linkage Study
Funder
National Health and Medical Research Council
Funding Amount
$97,700.00
Summary
This project will provide the first Australian population-based estimates of metastaticbreast cancer (MBC) incidence and survival in women with an initial diagnosis of early stage cancer that reflect current treatment practices. This evidence will help: women with MBC and their clinicians to make decisions about treatment and plan supportive care; researchers planning trials of MBC therapies, and future planning of cancer services.
In women there is a strong link between increased risk of breast cancer and low levels of vitamin D. We will use a novel explant system where breast tissue biopsies from women with breast cancer will be used to explore the metabolism of vitamin D and its consequences. This grant proposal will determine the dose of vitamin D that will provide a preventative strategy for breast cancer in the general population, and potential of vitamin D as an adjunct treatment in women with breast cancer.
Noncoding RNAs As Prognostic Markers And Therapeutic Targets In Breast Cancer
Funder
National Health and Medical Research Council
Funding Amount
$550,283.00
Summary
Normal human development involves a symphony of genetic changes that control the growth and differentiation of different types of cells during embryogenesis. For many years it has been assumed that most genetic information is transacted by proteins, and that the remaining 98% of the human genome that does not encode proteins was (apart from a limited amount of associated regulatory elements) largely non-functional evolutionary junk. However, this may not be the case. Recent results from our labo ....Normal human development involves a symphony of genetic changes that control the growth and differentiation of different types of cells during embryogenesis. For many years it has been assumed that most genetic information is transacted by proteins, and that the remaining 98% of the human genome that does not encode proteins was (apart from a limited amount of associated regulatory elements) largely non-functional evolutionary junk. However, this may not be the case. Recent results from our laboratory and others have shown that most of our genome and that of other mammals is actually expressed as noncoding RNA, which appears to be developmentally regulated. These RNAs (of which there appear to be tens of thousands, well outnumbering the protein-coding mRNAs) have been referred to as the hidden layer or dark matter of our genome, as they have barely been studied, but appear to play a central role in both normal and abnormal development in humans. There is now increasing evidence that many noncoding RNAs, including small regulatory RNAs called microRNAs, are perturbed in cancer and that these perturbations may be directly involved in, and be an accurate indicator of, cancer state and the direction of cancer progression. If this is true we need to understand the expression and functions of these RNAs in order to develop better diagnostics and perhaps powerful new therapeutics for cancer, based on RNA technology and generic delivery systems. This project will explore the patterns of noncoding RNA expression in normal breast development and in breast cancer, to identify those RNAs that direct or accompany the differentiation of these tissues, and to test the effects of interfering with their expression on these processes. These foundation studies lie at the leading edge of a new understanding of human genetics and cancer, and will provide a platform for future applications in medicine that utilize this information and understanding.Read moreRead less
Integrin Beta3 As A Therapeutic Target For Breast Cancer Metastasis To Bone
Funder
National Health and Medical Research Council
Funding Amount
$431,675.00
Summary
There are limited effective treatments for advanced breast cancer. The project investigates the role of a protein called integrin beta3 in the spread of breast tumours to bone, the most common site of secondary tumour formation (metastasis) in breast cancer patients. We will determine if the presence of integrin beta3 in breast tumours identifies patients at risk of developing bone metastases and test novel drugs against integrin beta3 in mice.
SNAC2: A Randomised Trial Of Extending Sentinel Node Based Management To Women With Larger Or Multifocal Breast Cancers
Funder
National Health and Medical Research Council
Funding Amount
$1,266,430.00
Summary
SNAC2 extends the work begun in SNAC1, which recruited 1,088 women over 4 years. SNAC1 will determine if sentinel node biopsy causes less arm problems than axillary clearance. The goal of SNAC2 is to establish the risk of local recurrence and long term safety of sentinel node biopsy, especially for women with larger or multiple tumours. SNAC2 is needed to determine whether the smaller operation gives cure rates as good as axillary clearance. If it does, then it will become standard practice.