Investigating The Genetic Cause Of Genital Abnormalities In Males
Funder
National Health and Medical Research Council
Funding Amount
$299,564.00
Summary
This project investigates the genetic cause of a relatively common defect in male genitalia, hypospadias, in which the penis opening is aberrantly located. Hypospadias affects 1 in ~250 males, usually requires surgery and can cause problems with intercourse and urination. Using new technologies to study patient DNA, we will identify mutations causing hypospadias and new genes involved in development of the male genitalia. This will lead to improved clinical diagnosis and management of patients.
Noradrenaline Transporter Dysfunction In Neural Circulatory Disorders: Clinical, Molecular And Therapeutic Implications
Funder
National Health and Medical Research Council
Funding Amount
$510,870.00
Summary
We will investigate the clinical relevance of noradrenaline transporter (NET) dysfunction and its molecular and genetic regulation in (1) essential hypertension, (2) postural tachycardia syndrome where the heart rate increases abnormally when the patient assumes an upright position and (3) syncope where subjects experience recurrent blackouts. In a therapeutic approach, we will explore whether NET inhibition can reduce the number of episodes and alleviate the symptoms associated with syncope.
Identification Of A Genetic Defect Characterized By Radiosensitivity And Defective P53 Stabilization
Funder
National Health and Medical Research Council
Funding Amount
$267,750.00
Summary
Radiation is an important therapeutic agent for the treatment of a variety of cancers. However, radiation also causes cancers, certainly at high doses but it remains unclear as to the threat from low dose radiation eg in the vicinity of radiation accidents and at high altitudes. A greater understanding of the threats of radiation exposure is possible from the study of a number of rare syndromes characterized by extreme sensitivity to radiation and predisposition to develop cancer. The identifica ....Radiation is an important therapeutic agent for the treatment of a variety of cancers. However, radiation also causes cancers, certainly at high doses but it remains unclear as to the threat from low dose radiation eg in the vicinity of radiation accidents and at high altitudes. A greater understanding of the threats of radiation exposure is possible from the study of a number of rare syndromes characterized by extreme sensitivity to radiation and predisposition to develop cancer. The identification of new syndromes with radiosensitivity assists in delineating the overall response to radiation and the connection with cancer. This project is designed to identify the molecular basis of what appears to be a novel defect. It has some of the characteristics of a well described syndrome ataxia-telangiectasia (A-T), namely signs of neurodegeneration and sensitivity to radiation but the protein defective in A-T appears to have normal function in this case. A comprehensive investigation of a number of pathways of radiation signaling is planned to identify the nature of the defect.Read moreRead less
There are new genetic technologies on the horizon that will influence decision-making about testing in pregnancy for fetal abnormality and also create a greater need for communication of important genetic information in families. Two areas of my research will focus on these issues. I will also examine how the interaction between genes and the environment during pregnancy, specifically in relation to alcohol use and assisted reproduction, impacts on offspring health and development
Mechanism Of Activation Of ATM By DNA Double Strand Breaks And Other Stimuli
Funder
National Health and Medical Research Council
Funding Amount
$517,751.00
Summary
The human genetic disorder ataxia-telangiectasia is a rare human disease characterised by cancer predisposition and neuronal degeneration. The gene defective in this disorder, ATM, plays a central role in recognising damage to the genetic material and activates a number of different cellular pathways designed to maintain stability of genome and minimise the risk of cancer and other pathologies. In this project we are investigating how the protein is activated from a dormant state to phosphorylat ....The human genetic disorder ataxia-telangiectasia is a rare human disease characterised by cancer predisposition and neuronal degeneration. The gene defective in this disorder, ATM, plays a central role in recognising damage to the genetic material and activates a number of different cellular pathways designed to maintain stability of genome and minimise the risk of cancer and other pathologies. In this project we are investigating how the protein is activated from a dormant state to phosphorylate a series of substrates involved in cellular signaling. Information in this process is very significant since the genetic lesion that activates ATM is a double strand break in DNA which not only is a potentially lethal lesion to the cell but has also the capacity to destabilize the genetic material. Information on this mechanism will also be useful for the design of small molecules that might interfere with ATM activation and in this way make tumour cells more susceptible to radiotherapy.Read moreRead less
Understanding Human Dysmorphology Through Analysis Of ENU Mutant Mice
Funder
National Health and Medical Research Council
Funding Amount
$602,501.00
Summary
Birth defects are common and have an enormous impact on both the individual and their family. Birth defects are by definition the products of abnormal development of the embryo. Our research is aimed at identifying the normal mechanisms that usually prevail during development and the disturbances to those mechanisms that result in birth defects. These findings will lead to improved diagnostic, therapeutic and preventative options for families affected by birth defects
Rapid Identification And Characterisation Of Genes Involved In Skeletal Development
Funder
National Health and Medical Research Council
Funding Amount
$550,536.00
Summary
Birth defects are common and have an enormous impact on both the individual and their family. Birth defects are by definition the products of abnormal development of the embryo. Our research is aimed at identifying the normal mechanisms that usually prevail during development and the disturbances to those mechanisms that result in birth defects. These findings will lead to improved diagnostic, therapeutic and preventative options for families affected by birth defects
Determining The Causes Of Congenital Vertebral Defects
Funder
National Health and Medical Research Council
Funding Amount
$956,136.00
Summary
Many birth defects cause vertebral malformations along the spinal column. These originate as the fetus forms, and we have previously shown that some of these are caused by gene mutation and/or environmental factors during gestation. However, the origins of many such defects remain unexplained. We will examine the DNA of a large number of patients to find more genes causing such defects. We will also test if these new genes predispose a fetus to being more susceptible to environmental influences.
The Role Of Netrin-DCC In The Development Of The Corpus Callosum
Funder
National Health and Medical Research Council
Funding Amount
$512,065.00
Summary
During embryonic development neurons send out axons that connect to other target neurons within the brain. The proper connectivity of these axons is vital to brain function. The largest axon tract in the brain is called the corpus callosum and connects neurons in the left and right cerebral hemispheres. When the corpus callosum does not form, significant cognitive, motor and sensory deficits occur in patients. This condition, known as agenesis of the corpus callosum (ACC), is associated with ove ....During embryonic development neurons send out axons that connect to other target neurons within the brain. The proper connectivity of these axons is vital to brain function. The largest axon tract in the brain is called the corpus callosum and connects neurons in the left and right cerebral hemispheres. When the corpus callosum does not form, significant cognitive, motor and sensory deficits occur in patients. This condition, known as agenesis of the corpus callosum (ACC), is associated with over 50 different human congenital syndromes. Thus understanding how the genes and molecules involved in the formation of the corpus callosum function in normal development can provide the basis for our understanding of what goes wrong in ACC. In this proposal we will investigate the role of the axon guidance molecule Netrin1, and its receptor DCC, in development of the corpus callosum in both a mouse model and in humans with malformations of the corpus callosum. Although Netrin1-DCC signalling has traditionally been associated with mechanisms of axon guidance, we hypothesize that these molecules may play a different role, specifically in cellular adhesion and ultimately in the fusion of the two cerebral hemispheres, in a manner that allows the corpus callosum to form. A second role for Netrin1-DCC signalling may be in the guidance of these axons once the midline has fused correctly and we investigate this in Aim 2 of the proposal. Finally, we are collaborating with a paediatric neurologist at UCSF, who has identified several mutations in the DCC gene in patients with ACC. In Aim 3 we test whether these mutations disrupt the function of DCC in callosal axon pathfinding. Understanding how these genes function during development of the brain and how their function may be altered in ACC is crucial to providing a proper diagnosis and prognosis for these patients. Ultimately, understanding more about how these genes function could also lead to prevention of these disorders.Read moreRead less