The Australian Centre of Excellence in Twin Research will build on the Australian Twin Registry, which for 30 years has played an integral part in health & medical research. The new Centre aims to expand a state-of-the-art resource for conducting research, bring together leading national and international researchers from across disciplines, and build capacity in people, techniques, and expertise to continue to enable twin research to address major health and medical issues.
Heritable And Environmental Determinants Of Hospitalisation For Common Childhood Illnesses
Funder
National Health and Medical Research Council
Funding Amount
$468,238.00
Summary
This study will combine the unique and powerful resources of the Western Australian (WA) Data Linkage System and the WA Twin Register to disentangle the effects of genetics and the environment on the most common infectious causes of hospital admissions in children. It will highlight appropriate pathways to prevent such admissions in the future.
Fine Mapping Of Genes Underlying Asthma And Eosinophilia
Funder
National Health and Medical Research Council
Funding Amount
$278,000.00
Summary
Asthma is the fourth most common chronic disease in Australia, and is increasing in incidence. Genetic factors are known to be important modifiers of disease risk, and several genes have been reported in the literature as being involved in either causing asthma or altering response to therapy. Immunoglobulin E (IgE) level and eosinophil count are two factors known to be increased in the blood of asthmatics. In two studies by our group, one of asthma in families, the other of healthy adolescent t ....Asthma is the fourth most common chronic disease in Australia, and is increasing in incidence. Genetic factors are known to be important modifiers of disease risk, and several genes have been reported in the literature as being involved in either causing asthma or altering response to therapy. Immunoglobulin E (IgE) level and eosinophil count are two factors known to be increased in the blood of asthmatics. In two studies by our group, one of asthma in families, the other of healthy adolescent twins, we showed these measures to be genetically linked to two different regions in the genome. Closer examination of these regions found several genes that might be responsible for the linkage. In the present study, we plan to test which of these candidate genes actually causes elevated IgE level or eosinophil count. The approach is to compare the frequency of a putative gene in a child expressing that phenotype to that in their parents. Each child receives one copy of a gene from the father, and one from the mother, making up a complete genotype (two possibly different versions or alleles of the gene). Since each parent transmitted only one allele to the child, the remaining allele from each parent can be used to create a normal control genotype, that is guaranteed to come from the same ethnic background as the asthmatic child. Therefore, we will collect replacement blood samples in those familes where all the previously DNA has been used up in our earlier study. We will extract DNA, and measure the genotypes of parents and children at the 6 genes in our two regions that we think most likely to be involved in eosinophil count or IgE level. This family based test will allow us to decide which genes are genuinely associated with asthma in our population. We will also test if these genes interact with other genes thought to be asthma risk factors. Identification of novel genes involved in asthma will help understand and ultimately treat this condition.Read moreRead less
Genetic and environmental causes of asthma are poorly understood. The WATCH for asthma project will study Western Australian (WA) families in which there was a twin or higher order multiple birth (twin families) in order to measure inherited and environmental contributions to the development of asthma. All WA twin families, whose infants were born during 1990 to 1995, will be invited to become part of an existing Healthway funded, population based registry of WA Twin Child Health (the WATCH stud ....Genetic and environmental causes of asthma are poorly understood. The WATCH for asthma project will study Western Australian (WA) families in which there was a twin or higher order multiple birth (twin families) in order to measure inherited and environmental contributions to the development of asthma. All WA twin families, whose infants were born during 1990 to 1995, will be invited to become part of an existing Healthway funded, population based registry of WA Twin Child Health (the WATCH study). The WATCH study has already invited 2,751 WA twin families to participate and is the only population based twin study in Australia. Funding of this study by NH and MRC will enable the extension of this unique registry to include more specific clinical information about those families in which one or more of the twins has asthma. In addition to questionnaire data, DNA and physiological information will be collected, including a potentially important new measure of airway inflammation, exhaled nitric oxide which has yet to be studied for familial aggregation. We will use the extended WATCH dataset to undertake a comprehensive investigation of the genetic epidemiology of childhood asthma. This work offers the potential to advance our current understanding of the causes of both childhood asthma and associated traits (e.g., 'twitchy' airways). By exploring the relationships between different components of asthma, we will generate information to assist us to design better epidemiological and genetic studies of asthma. At the time of recruitment, if consent is given, blood will also be taken for DNA extraction and frozen storage. This will generate a powerful data base that can later be used for to search at a molecular level for genes potentially important in causing childhood asthma. Finally, by extending the WATCH study database we will be enhancing a research resource that could potentially be used for future studies of common complex diseases other than asthma.Read moreRead less
Morphological And Spectroscopic Study Of Monozygotic Twins Discordant For Epilepsy
Funder
National Health and Medical Research Council
Funding Amount
$139,079.00
Summary
Understanding the causes of epilepsies is essential for treatment and prevention. In many people with epilepsy the cause is not obvious and is frequently attributed to events at birth or minor head injuries. It is clear that these factors are generally not important. There is increasing evidence that subtle changes in brain structure, reflecting developmental or maturational abnormalities, may be the cause of these epilepsies. Such subtle changes can be detected by novel magnetic resonance imagi ....Understanding the causes of epilepsies is essential for treatment and prevention. In many people with epilepsy the cause is not obvious and is frequently attributed to events at birth or minor head injuries. It is clear that these factors are generally not important. There is increasing evidence that subtle changes in brain structure, reflecting developmental or maturational abnormalities, may be the cause of these epilepsies. Such subtle changes can be detected by novel magnetic resonance imaging strategies. However, due to individual differences of brain morphology, the significance of such subtle changes can be disputed. Monozygotic twins have an increased similarity of their brain morphology. Therefore, analysis of monozygotic twins where only one twin is affected with epilepy, is a powerful way to characterize significant brain abnormalities. This will provide novel information on the causes of epilepsy relevant to the general population.Read moreRead less