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Reversal Of Diabetes In Pigs Using Liver-directed Gene Therapy
Funder
National Health and Medical Research Council
Funding Amount
$573,807.00
Summary
Type I diabetes mellitus is caused by the autoimmune destruction of the beta cells of the pancreas that secrete insulin. We have shown that we can cure diabetes in spontaneously diabetic mice by delivery of the insulin gene to the liver using a non-pathogenic viral delivery system. The study aims to repeat this work in pigs which have similar physiology to humans. If successful this would be proof-of-principle that we could theoretically control blood glucose levels in humans.
Evaluation And Comparison Of Lentiviral And AAV Vector Mediated Gene Therapy For The Mucopolysaccharidoses
Funder
National Health and Medical Research Council
Funding Amount
$521,320.00
Summary
The mucopolysaccharidoses are a group of inherited diseases that have profound consequences for affected individuals. They have pleiotropic effects and usually result in premature death. Although intravenous enzyme replacement therapy has been developed for a number of these disorders, this approach to therapy is invasive, very expensive, of limited efficacy, and is completely ineffective in treating brain pathology. The principal reason for this is the protected nature of the brain which preven ....The mucopolysaccharidoses are a group of inherited diseases that have profound consequences for affected individuals. They have pleiotropic effects and usually result in premature death. Although intravenous enzyme replacement therapy has been developed for a number of these disorders, this approach to therapy is invasive, very expensive, of limited efficacy, and is completely ineffective in treating brain pathology. The principal reason for this is the protected nature of the brain which prevents enzymes that are administered intravenously from entering. Therefore, alternative therapies must be considered in order to provide more effective therapy for the mucopolysaccharidoses, especially those that have significant brain pathology. Gene therapy is one such alternative therapy but this still faces the problem of introducing the therapeutic agent (in this case the gene encoding the requisite enzyme) into the brain. This project aims to provide a comparitive evaluation of two gene therapy vectors for their efficacy in treating all aspects of the pathology found in the mucopolysaccharidoses. Both vectors have the properties of being able to efficiently deliver genes to different cell types and result in the stable genetic modification of the target cell, making them ideal for long-term treatment. However, for effective gene therapy, significant and widely distributed gene delivery to the brain, as well as to other tissues, will be required. This project aims to compare the efficacy of these vectors in two different animal models of the mucopolysaccharidoses that exhibit a wide range of the clinical problems associated with these diseases, importantly including brain pathology.Read moreRead less
Modelling The Loss Of NF1 Heterozygosity In Congenital Pseudarthrosis Of The Tibia (CPT).
Funder
National Health and Medical Research Council
Funding Amount
$482,978.00
Summary
Congenital pseudarthrosis of the tibia or CPT is a dibilitating orthopaedic condition that affects children. Healing of a CPT is poor and, even with modern surgical techniques, amputation is a frequent outcome. As a group experienced in animal models of bone healing, we are well positioned to develop advanced genetic models of CPT in mice. With a better understanding of the underlying processes in CPT we will be able to develop treatments for this severe childhood condition.
The goal of our work is to improve outcomes for patients who are blind or seriously visually impaired as a result of corneal disease. Such patients can regain vision through a corneal transplant, but many such transplants fail. A corneal graft may fail because of an unwanted immune response, because blood vessels grow into the graft, or because some corneal cells die. We plan to transfer genes to the donor cornea in the laboratory, prior to corneal transplantation, to avoid such failure.
Gene Therapy, Stress Haematopoiesis And The Risk Of Malignancy
Funder
National Health and Medical Research Council
Funding Amount
$617,354.00
Summary
The immense potential of gene therapy has been confirmed by the successful treatment of immune deficiencies disorders. A key issue that has emerged however is the need to avoid potentially cancer-causing genetic damage to cells undergoing repair. Some of this risk can be linked to the gene repair technology used, but we have identified and propose to investigate another potentially important mechanism involving the unusually high levels of replication imposed on cells during disease correction.
Regulation Of Sympathetic Vasomotor Function By Brain Angiotensin: Cell-specific Modulation Of Function In Vivo.
Funder
National Health and Medical Research Council
Funding Amount
$354,975.00
Summary
Adequate blood pressure is necessary for normal function. High blood pressure occurs in a proportion of the human population and causes many diseases such as stroke and heart failure. The factors producing high blood pressure are not known for most people who have this condition. We are investigating the role of the brain in the regulation of blood pressure and in this application we are testing whether increased activity in certain brain regions can cause high blood pressure.
Reprogramming The Renal Epithelium To Reinitiate Nephrogenesis
Funder
National Health and Medical Research Council
Funding Amount
$636,199.00
Summary
It has been shown that a mature cell type can be reprogrammed to a different type of cell in vivo via the introduction of genes critical during an earlier stage of organ development. In this way, new beta-islet cells in the pancreas can be made. In this study, we will use our understanding of kidney development to redirect the cells of the kidney tubules to dedifferentiate and form new nephrons. This may ultimately result in a regenerative strategy to treat chronic renal disease.
In recent years it has become clear that certain white blood cells called CD8+ T lymphocytes or killer T cells are required to protect people against HIV. Unfortunately, current vaccines that produce or anti-HIV CD8 T cells only produce effective T cells for a short period. In this project we intend to test a novel vaccine vector called a Kunjin replicon, which promises to persistently produce or maintain effective T cells because the vaccine itself persists and continually immunises for extende ....In recent years it has become clear that certain white blood cells called CD8+ T lymphocytes or killer T cells are required to protect people against HIV. Unfortunately, current vaccines that produce or anti-HIV CD8 T cells only produce effective T cells for a short period. In this project we intend to test a novel vaccine vector called a Kunjin replicon, which promises to persistently produce or maintain effective T cells because the vaccine itself persists and continually immunises for extended periods. We intend to test the ability of this vaccine to persist and persistently produce effective CD8 T cells not only systemically in the blood system but also at mucosal surfaces, where HIV usually gains entry during sexual intercourse.Read moreRead less
Dengue is the leading mosquito-borne virus causing morbidity and mortality in the tropics. North Queens land has a history of dengue outbreaks, with 5 outbreaks in the last 3 years. Queensland Health has developed a Dengue Fever Management Plan for north Queensland that has had considerable success in preventing small outbreaks of dengue from developing into large epidemics. The cornerstone of this plan is the application of residual insecticide inside premises near dengue cases to kill the mosq ....Dengue is the leading mosquito-borne virus causing morbidity and mortality in the tropics. North Queens land has a history of dengue outbreaks, with 5 outbreaks in the last 3 years. Queensland Health has developed a Dengue Fever Management Plan for north Queensland that has had considerable success in preventing small outbreaks of dengue from developing into large epidemics. The cornerstone of this plan is the application of residual insecticide inside premises near dengue cases to kill the mosquito vector, Aedes aegypti, before it can spread the virus. While this method is effective, it is labor intensive, requires the cooperation of homeowners who may find it intrusive and exposes nontarget insects and animals to insecticide. We propose to develop a lure and kill strategy to improve the efficacy of vector control while minimising the exposure of nontarget animals. Several chemicals have been identified as highly attractive to dengue mosquitoes. Among these are extracts from water infusions of grass that are highly attractive to egg-laying mosquitoes and emanations from human skin that attract host-seeking mosquitoes. We will develop traps incorporating a. mosquito attractants and b. a killing agent to selectively control Ae. aegypti mosquitoes. These will be collectively called lethal traps. This project will employ the following approach towards the development of a lure and kill strtaegy for dengue control a. determine which compounds are most attractive to north Queensland Ae. aegypti in a laboratory wind tunnel; b. confirm the attraction of these compounds using sticky traps in the field; c. conduct field trials of candidate lethal traps to determine the spacing and density of traps needed to control mosquitoes d. conduct a large field trial to examine the efficacy of the optimised lure and kill strategy. We will also conduct ecological studies on aging and the flight range of Ae. aegypti to enhance the development of the strategy.Read moreRead less