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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
Characterisation Of Cumulus Cell Molecular Mediators Of Oocyte Health
Funder
National Health and Medical Research Council
Funding Amount
$451,896.00
Summary
Many women are poorly fertile because of poor egg quality due to age, disease and lifestyle. IVF can assist, but requires large doses of hormone, which can lead to significant health risks. IVM is an alternative lab technique to IVF, but has very poor success. We discovered that synthetic proteins copied from recently discovered egg proteins can be added to the egg and substantially increase IVM success. Answering why will further will aid treatment for infertile women
Genetic testing of IVF embryos promises to improve success but shows no effect of live-birth rates. Many embryos are mosaic: containing cells with correct and incorrect chromosome numbers. Current testing is an invasive biopsy which fails to diagnose how many cells are abnormal in the cells that develop into the baby. Here we will use imaging to determine the ratio of abnormal:normal cells resulting in a non-invasive diagnostic that will improve IVF success.
Compound Culture Media To Improve Human IVF Pregnancies
Funder
National Health and Medical Research Council
Funding Amount
$254,340.00
Summary
In Australia 1 in 6 couples require IVF to conceive. Although pregnancy rates have improved over the last 10 years the live birth rate in Australia per cycle is only 17%. This project will assess a new method for the culture of embryos for the ability to maintain embryo vitality and produce healthy babies.
A Media Formulation To Improve Implantation Rates And Pregnancy Outcome Following ART
Funder
National Health and Medical Research Council
Funding Amount
$304,380.00
Summary
Since women are delaying childbearing, ART is increasingly required. 2-3% of births in Australia follow ART. Only 15-40% of embryo transfers in assisted reproduction (ART) result in ongoing pregnancies. The poor success rate is due to the fact that the embryo culture media bear no resemblance to the maternal environment in which they grow normally. The new culture media to be validated in this proposal includes factors that are critical for embryo implantation and will improve ART success.
Infertility remains a devastating disease for many couples, despite the success of IVF, as treatment is often unsuccessful, or remains out-of-reach for both health and/or financial reasons. My fellowship aims to improve our understanding of some of the causes of infertility in women. This will translate to a new infertility treatment that is safer for their health and provides for improved long-term health outcomes for their children.