Molecular Mechanisms Of Inherited Hypocholesterolaemias: Impact Of APOB And MTTP Mutations On Lipoprotein Assembly And Secretion
Funder
National Health and Medical Research Council
Funding Amount
$200,213.00
Summary
Inherited low cholesterol levels can be caused by mutations in either of two genes: APOB and MTTP. These genes encode proteins that are critical for the assembly of fat particles in the body. We plan to use cell lines to study how single amino acid changes out of the 4500 in ApoB and the 900 in the MTTP protein affect protein production, binding with other proteins, and fat particle assembly.
Investigating The Pathogenic Mechanism Of Mutations In IQSEC2 Causing Non-syndromic Intellectual Disability.
Funder
National Health and Medical Research Council
Funding Amount
$449,016.00
Summary
Intellectual disability is frequent in the population, as many as 1 in every 50 people in the world affected. Mutations in IQSEC2, an X-chromosome gene, cause intellectual disability. We will screen 1000 families with this disability for mutations in IQSEC2, building the picture of disease symptoms, contributing to informed genetic counselling. We will investigate functional impacts of these mutations in neuronal cultures, increasing our understanding of the causes of intellectual disability.
Identification Of Antigen Selection In The Human IgE Response By Analysis Of Somatic Point Mutations
Funder
National Health and Medical Research Council
Funding Amount
$256,973.00
Summary
Allergic disease affects over 25% of the Australian community. It is responsible for significant sickness and death, particularly amongst children, and its incidence is on the increase. The reasons for this, and the underlying causes of allergic disease, remain unclear. Allergic disease results from the actions of molecules called IgE antibodies, which are also associated with parasitic infection. Even in these conditions, where IgE concentrations are raised in the blood, the concentrations are ....Allergic disease affects over 25% of the Australian community. It is responsible for significant sickness and death, particularly amongst children, and its incidence is on the increase. The reasons for this, and the underlying causes of allergic disease, remain unclear. Allergic disease results from the actions of molecules called IgE antibodies, which are also associated with parasitic infection. Even in these conditions, where IgE concentrations are raised in the blood, the concentrations are too low to allow their direct study. We have recently applied molecular biological techniques to study the genes that encode IgE antibodies. Our work suggests that the IgE response can sometimes develop in a different way to that of other antibodies (eg IgG). On the other hand, laboratory (in vitro) studies over many years support the possibility that IgE and IgG develop in parallel. In this study, we wish to identify circumstances in which IgG-like IgE antibodies develop. We therefore wish to study patients with different kinds of allergic disease, and patients with other conditions that are associated with IgE production. We therefore wish to study patients who have infections with parasitic worms. We deduce the processes that give rise to IgE antibodies by analysing patterns of mutations that accumulate in antibody genes during an immune response. Over recent years, we have developed new approaches to the analysis of such mutations, and this project also seeks to further develop our mutation analysis. This more powerful analysis will be applied to the study of mutations in the IgE genes seen in different patient groups, and should allow us to quantify the proportion of IgE antibodies that develop in each way. A better understanding of the relative contributions of the two pathways to IgE, in different conditions, will transform our understanding of the IgE response, and open up new avenues for the investigation of the causes and treatment of allergic disease.Read moreRead less
In melanoma we hypothesise there is a series of as yet unidentified gene fusions which provide oncogenic stimulatory signals that promote tumour growth and that these novel fusion products are excellent targets for the design of new therapies to treat melanoma. The aims of this study are to identify oncogenic fusions in melanoma, to assess which of these are recurrent, and to demonstrate that the resulting fusion proteins provide a selective growth and-or survival advantage to the tumour cell.
Analysis And Regulation Of Leptospiral Virulence Factors.
Funder
National Health and Medical Research Council
Funding Amount
$630,465.00
Summary
Leptospirosis is a globally important infectious disease caused by Leptospira spp. This project aims to identify and characterise factors which play a role in disease development by knocking out genes, then investigating the impact on overall gene-protein expression in the mutant strain and its ability to cause disease. This will allow us to gain insights on mechanisms by which Leptospira spp. cause disease, leading to development of better methods of disease control and prevention.
Identification Of The Molecular Mechanisms By Which Mutations In FHL1 Lead To Protein Misfolding And Skeletal Muscle Disease
Funder
National Health and Medical Research Council
Funding Amount
$609,424.00
Summary
Skeletal muscle diseases result in debilitating muscle loss and may result from an error (mutation) within a gene. Mutations in FHL1 were identified as the cause of four different muscle diseases. Using purified FHL1, skeletal muscle cells and animal models we will investigate how FHL1 mutations cause muscle wasting, and loss of muscle strength.