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Functional Genomic Analysis Of The Role Of P53 In Early Embryo Death After Assisted Reproductive Technologies (ART).
Funder
National Health and Medical Research Council
Funding Amount
$227,036.00
Summary
Assisted reproductive technologies (ART, such as IVF and related techniques) are successful treatments for most forms of infertility. ART are expensive therapies and much of this cost is related to the relative inefficiency of the technology. Much of this is due to the high mortality of the resulting embryos. Typically, 45-80% of embryos produced by ART do not survive the first week. Consequently the chance of any individual embryo resulting in a successful birth is not high. There has been only ....Assisted reproductive technologies (ART, such as IVF and related techniques) are successful treatments for most forms of infertility. ART are expensive therapies and much of this cost is related to the relative inefficiency of the technology. Much of this is due to the high mortality of the resulting embryos. Typically, 45-80% of embryos produced by ART do not survive the first week. Consequently the chance of any individual embryo resulting in a successful birth is not high. There has been only modest increments in embryo survival in recent years. The low cahnce of individual embryos resulting in a baby means that: (1) generally several treatment cycles are required; (2) superovulation is used to maximise the number of embryos produced giving an accumulation of unwanted cryopreserved embryos; (3) more than one embryo is generally transferred resulting in a significant incidence of multiple pregancies. The high mortality of the early embryo seems to be a general feature of IVF but its causes and effectors are not known. It has recently been established that it largely occurs due to a form of cell 'suicide' known as apoptosis. This form of cell death has important normal functions: its activation allows for cells that are no longer required to be removed, allowing the remodelling of tissues and it also serves to remove cells that are irreversibly damaged. p53 is a protein that has the ability to 'sense' cell stress and damage and to direct the cell to undergo apoptosis if the stress is severe. This project will examine if ART cause increased expression of p53 and whether this elevation of p53 causes embryonic cell death. We will examine the factirs that control p53 expression in the embryo. using mice with mutations that stop the function of p53 and several of its regulatory proteins. Experiments will determine the susceptibility of embryos possessing these mutations and will therefore allow us to define the proteins causing apoptosis after ART.Read moreRead less
Endometrial Exosomes: A New Paradigm In Endometrial-embryo Cross-talk
Funder
National Health and Medical Research Council
Funding Amount
$726,978.00
Summary
Establishment of pregnancy requires molecular communication between the embryo and the lining of the womb (the endometrium) which enhances implantation into the womb and placental development. Nanoparticles (exosomes) released by the endometrium into the uterine cavity, carry cargo of genetic material and proteins, which may be transferred to the pre-implantation embryo. We will define functional changes induced by exosomes, that impact on implantation and the fetus’s long-term health.
Identifying The Critical Components Of Growth Factor-mediated Survival Pathways
Funder
National Health and Medical Research Council
Funding Amount
$589,338.00
Summary
The regulation of cell lifespan (cell survival) is controlled by growth factors and lies at the heart of all biological processes. However, little is known of the molecular switches inside cells that either turn survival on or off. We propose to identify and characterize the molecular switches inside cells that control the balance between cell survival and death. Targeting specific components of these switches may provide new approaches for the treatment of cancer and infectious diseases.
Generation Of Mouse Models To Study The Roles Of Different Bcl-2 Family Members In The Regulation Of Apaptosis
Funder
National Health and Medical Research Council
Funding Amount
$420,872.00
Summary
Programmed cell death, or apoptosis, is required for the removal of infected, damaged or unwanted cells and its disrupted regulation is implicated in cancer, autoimmunity and degenerative disorders. The Bcl-2 family of proteins are key regulators of apoptosis. We propose to generate several mouse models to better understand the relationships between the different members of the Bcl-2 family in an effort to control this pathway for therapeutic purposes.
Cell death by a specialised process known apoptosis is a way of deleting unwanted and harmful cells from the body. As such, aberrant apoptosis is associated with a wide array of diseases including cancer. For example, abnormal levels of proteins that suppress apoptosis or enhance cell survival can result in cancer and often produce resistance to chemotherapy. To understand and treat cancers that result from aberrant apoptosis we need to know at a molecular level how apoptosis is regulated. Centr ....Cell death by a specialised process known apoptosis is a way of deleting unwanted and harmful cells from the body. As such, aberrant apoptosis is associated with a wide array of diseases including cancer. For example, abnormal levels of proteins that suppress apoptosis or enhance cell survival can result in cancer and often produce resistance to chemotherapy. To understand and treat cancers that result from aberrant apoptosis we need to know at a molecular level how apoptosis is regulated. Central to the apoptosis execution are a group of enzymes called caspases that target many cellular proteins for specific cleavage. In this proposal, we will investigate the function of one of the caspases (called caspase-2), in order to better understand its potential role in the apoptosis of cancer cells. A number of recent reports suggest that caspase-2 levels are reduced in many cancer cells. The human caspase-2 gene localizes to a chromosomal region frequently affected- deleted in leukaemia, and caspase-2 levels have been proposed to be predictors of remission and survival in patients with some types of leukaemia. We will study if loss of caspase-2 in cancer cells makes them resistant to killing by drugs and if mice lacking caspase-2 have an increased potential to develop cancer. Understanding caspase-2 function and its regulation is likely to provide new therapeutic opportunities and potential targets for cancer therapy.Read moreRead less
20 Year Study Of Skin Cancer In A Queensland Community
Funder
National Health and Medical Research Council
Funding Amount
$396,415.00
Summary
Skin cancers are by far the commonest cancers diagnosed in Australia. Even though it is known that sun exposure in excess causes skin cancers there are complexities about the causes, especially of basal cell carcinoma (BCC) -the major type of skin cancer- that are still not understood. Relative intensity of sun exposure and perhaps its timing with respect to age in life may well be critical factors. We aim to study these causes in very great detail by collating information that has been gathered ....Skin cancers are by far the commonest cancers diagnosed in Australia. Even though it is known that sun exposure in excess causes skin cancers there are complexities about the causes, especially of basal cell carcinoma (BCC) -the major type of skin cancer- that are still not understood. Relative intensity of sun exposure and perhaps its timing with respect to age in life may well be critical factors. We aim to study these causes in very great detail by collating information that has been gathered over a 20 year period in a community-based skin cancer study in Nambour, Qld as well as performing some laboratory tests on skin cancer tissue collected from participants. This 3-year project will enable the full realisation of the potential of this esource-20 years in the making- with its wealth of information for answering questions about skin cancer decelopment and preventability. It should finally provide us with a clearer rationale for 'prevention of skin cancer' than is currently available. In addition we shall assess the costs of treatment of skin cancer in general and for the individual, and how much preventive practices for skin cancer might save the health budget, by using the releavnt data collected from this community sample.Read moreRead less
Australian Drosophila Biomedical Research Support Facility
Funder
National Health and Medical Research Council
Funding Amount
$1,008,895.00
Summary
Breakthroughs in biomedical research frequently come from the study of model organisms, one of the most important of which is the vinegar fly, Drosophila melanogaster. In Australia, Drosophila is used in biomedical research with a particular focus on understanding processes that result in human cancer or are associated with birth defects or inherited diseases. Drosophila-based research is funded by bodies such as the Anti-Cancer Foundation, the National Health and Medical Research Council (NH an ....Breakthroughs in biomedical research frequently come from the study of model organisms, one of the most important of which is the vinegar fly, Drosophila melanogaster. In Australia, Drosophila is used in biomedical research with a particular focus on understanding processes that result in human cancer or are associated with birth defects or inherited diseases. Drosophila-based research is funded by bodies such as the Anti-Cancer Foundation, the National Health and Medical Research Council (NH and MRC) and the National Institutes of Health of the USA. This proposal seeks to establish infrastructure support for Drosophila research in the form of a central collection of key research stocks, a centralized facility for the importation of genetically defined stocks and a facility for the generation of transgenic Drosophila for use in biomedical research.Read moreRead less