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Male Infertility And Defective Sperm-oocyte Interaction
Funder
National Health and Medical Research Council
Funding Amount
$244,614.00
Summary
Infertility affects 15% of people and although not usually ill, they are extremely distressed by the condition. In vitro fertilisation (IVF) with normal sperm and intracytoplasmic sperm injection for sperm defects, can assist such patients have a family, but these treatments are expensive and not always successful. The causes of male infertility are largely unknown, diagnostic methods are crude and there is usually no treatment to promote natural conception. Conventional semen analysis provides ....Infertility affects 15% of people and although not usually ill, they are extremely distressed by the condition. In vitro fertilisation (IVF) with normal sperm and intracytoplasmic sperm injection for sperm defects, can assist such patients have a family, but these treatments are expensive and not always successful. The causes of male infertility are largely unknown, diagnostic methods are crude and there is usually no treatment to promote natural conception. Conventional semen analysis provides limited information on fertilising ability. Our work over 15 years has shown that many patients go undiagnosed, particularly those with defects impairing fertilisation. During human fertilisation, sperm bind to the zona pellucida, a coat around the egg, via the membrane over a cap like structure on the sperm head called the acrosome. Binding of a sperm triggers the acrosome reaction, the process by which the membranes covering the acrosome fuse and the acrosomal contents are released. The sperm then penetrates the zona pellucida, binds to the membrane of the egg and is taken into the cytoplasm. We have developed tests to assess sperm binding to the zona pellucida and the acrosome reaction using eggs that failed to fertilise during clinical IVF. These tests show defects of sperm binding to the zona pellucida and the zona pellucida induced acrosome reaction are present in over 25% of patients without other obvious causes for their infertility. The men are severely infertile but have normal sperm by conventional tests. In this project we will determine if there are changes in membrane proteins in sperm which do not bind to the zona pellucida or undergo the acrosome reaction. We will categorise patients on the responses of their sperm to activation of key enzymes and other regulatory molecules involved in the fertilisation process. This will allow us to select subjects for further examination of protein abnormalities and genetic causes of the conditions.Read moreRead less
High performance electrolyte for the vanadium redox flow battery. Vanadium batteries present a highly-scalable, sustainable solution for storage of renewable electricity, but the technology needs to be improved for robust and efficient operation in the warm Australian climate. This project aims to design and extensively test new high-performance electrolyte compositions with advanced thermal stabilising additives for safe long-term battery operation at 60 °C. New knowledge in materials science a ....High performance electrolyte for the vanadium redox flow battery. Vanadium batteries present a highly-scalable, sustainable solution for storage of renewable electricity, but the technology needs to be improved for robust and efficient operation in the warm Australian climate. This project aims to design and extensively test new high-performance electrolyte compositions with advanced thermal stabilising additives for safe long-term battery operation at 60 °C. New knowledge in materials science and electrochemistry will be generated. The core outcome of the project is a sustainable large-scale energy storage technology ready for immediate application in Australia. This will support the transition of the Australian energy sector to renewables and provide businesses with distributed energy storage solutions.Read moreRead less
Clinical And Genetic Modifiers In The Progression To Cirrhosis In Hemochromatosis
Funder
National Health and Medical Research Council
Funding Amount
$68,539.00
Summary
Haemochromatosis is a disease related to a common genetic abnormality leading to progressive iron accumulation in tissues with the potential for liver fibrosis and eventually scarring of the liver. It has been noted that not all patients with haemochromatosis develop scarring of the liver and it is possible that this variation could be due to differences in lifestyle or health factors or alternatively due to genetic variability between patients. The study aims to investigate this further.
New Methods in the Theory and Computational Modelling of Unimolecular and Complex-Forming Bimolecular Reactions. This project will develop new theory and computational methods for the prediction of chemical reaction rates with massively increased efficiency. Complex reactions occurring in combustion which are surprisingly common, but have previously been only poorly understood. The project will make possible the application of detailed statistical and quantum dynamical theories to such complex r ....New Methods in the Theory and Computational Modelling of Unimolecular and Complex-Forming Bimolecular Reactions. This project will develop new theory and computational methods for the prediction of chemical reaction rates with massively increased efficiency. Complex reactions occurring in combustion which are surprisingly common, but have previously been only poorly understood. The project will make possible the application of detailed statistical and quantum dynamical theories to such complex reactions in order to improve the quality of chemical data which is used for modelling atmospheric change and pollution.
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Predicting Environmental Effects on Structure and Reactivity. This project tackles one of the most important and fundamental problems in theoretical chemistry: solvent effects on chemical reactions. The new methods and computer programs generated will be freely available to the Australian (and international) scientific communitities and will further enhance Australia's strong reputation in Theoretical Chemistry.
The applications chosen will allow new technologies in biosensing and strategies in ....Predicting Environmental Effects on Structure and Reactivity. This project tackles one of the most important and fundamental problems in theoretical chemistry: solvent effects on chemical reactions. The new methods and computer programs generated will be freely available to the Australian (and international) scientific communitities and will further enhance Australia's strong reputation in Theoretical Chemistry.
The applications chosen will allow new technologies in biosensing and strategies in computational drug design to be investigated. This will benefit the Australian biotechnology and pharmaceutical industries and may substantially aid in understanding the mechanism and treatment of disease. Read moreRead less