Evaluating host-parasite interplay in individual tissues. The immune system of the host and the infecting parasite has coevolved into a sophisticated balance of power. This project will explore this balance using Schistosoma japonicum infection in sheep and determine immune mechanisms unleashed by the host in various tissues as well as the response of the parasite to these attacks.
The critical role of kisspeptin/neurokinin/dynorphin (KNDy) neurons in gonadotropin releasing hormone (GnRH) release. The brain controls fertility through the secretion of its primary stimulatory factor, gonadotropin releasing hormone (GnRH). Brain cells producing three key peptide hormones, kisspeptin, neurokin B and dynorphin (termed KNDy cells) are vital for the control of GnRH. This project will detail the role of KNDy cells in puberty and reproduction.
Pathogenesis, regulation and genomics of the ovine footrot pathogen, Dichelobacter nodosus. Footrot is one of the most economically significant diseases of sheep in Australia. The aim of this project is to develop a detailed understanding of how the bacterium that causes this infection is able to infect the sheep hoof and result in clinical disease. The complete sequence of the genome of the causative bacterium will be determined, enabling us to deduce its genetic potential. The completed projec ....Pathogenesis, regulation and genomics of the ovine footrot pathogen, Dichelobacter nodosus. Footrot is one of the most economically significant diseases of sheep in Australia. The aim of this project is to develop a detailed understanding of how the bacterium that causes this infection is able to infect the sheep hoof and result in clinical disease. The complete sequence of the genome of the causative bacterium will be determined, enabling us to deduce its genetic potential. The completed project will significantly advance fundamental knowledge of the disease process and will lead to the development of improved methods for the control of the disease, with concomitant cost savings to Australian primary industry.Read moreRead less
Function and evolution of insect odorant receptors. This project aims to shed light on how insect odorant receptors function by using comparative genomic studies between the genetic model insect Drosophila melanogaster and a pest species, the Australian sheep blowfly. This project expects to generate knowledge of how specific chemicals activate specific receptors in order to excite sensory neurons and drive behaviour, which is not well understood. Expected outcomes include increased understandin ....Function and evolution of insect odorant receptors. This project aims to shed light on how insect odorant receptors function by using comparative genomic studies between the genetic model insect Drosophila melanogaster and a pest species, the Australian sheep blowfly. This project expects to generate knowledge of how specific chemicals activate specific receptors in order to excite sensory neurons and drive behaviour, which is not well understood. Expected outcomes include increased understanding of olfaction in insects, increased national and international collaboration, and outstanding graduate student training. This research will be of significant future benefit in deriving methods to modify the behaviour of insects of agricultural or medical importance, for example the sheep blowfly. Read moreRead less
Cracking the code of snails to elucidate parasite disease transmission. In Australia, a disease caused by liver flukes causes major economic losses to livestock production. The role of Australian pond snails as intermediate hosts for this parasite is poorly understood. This project aims to explore the phylogeography, biology and genomics of these snails. It expects to create novel molecular resources for important snail species and verify their roles as key vectors of flatworm parasites. The cur ....Cracking the code of snails to elucidate parasite disease transmission. In Australia, a disease caused by liver flukes causes major economic losses to livestock production. The role of Australian pond snails as intermediate hosts for this parasite is poorly understood. This project aims to explore the phylogeography, biology and genomics of these snails. It expects to create novel molecular resources for important snail species and verify their roles as key vectors of flatworm parasites. The curation of genomic and transcriptomic data sets, and elucidation of snail–parasite interactions will underpin the development of environmental diagnostic tests and deliver a new generation of intervention strategies to reduce the burden of liver fluke disease through the control of their snail intermediate hosts.Read moreRead less
Avoiding the immune response: lessons from 'simple' bacteria. Some of the most important bacterial diseases of domestic animals are caused by mycoplasmas. Improved control of these diseases would significantly improve agricultural productivity by reducing losses associated with reduced feed conversion efficiency and increased susceptibility to other diseases, as well as improve animal welfare and public health, by reducing the need for antibiotic therapy to control these diseases in food produci ....Avoiding the immune response: lessons from 'simple' bacteria. Some of the most important bacterial diseases of domestic animals are caused by mycoplasmas. Improved control of these diseases would significantly improve agricultural productivity by reducing losses associated with reduced feed conversion efficiency and increased susceptibility to other diseases, as well as improve animal welfare and public health, by reducing the need for antibiotic therapy to control these diseases in food producing animals.Read moreRead less
Understanding uterine contractility for reducing newborn lamb mortality. The project aims to elucidate the mechanisms underlying normal and dysfunctional uterine contractions in labouring ewes. Significantly, ~20% of newborn lambs die within days of birth, costing the Australian sheep industry more than $780 million annually. Difficult lambing is the leading cause of lamb mortality and weak uterine contractions are the most important contributor to difficult labour (dystocia). Intended outcomes ....Understanding uterine contractility for reducing newborn lamb mortality. The project aims to elucidate the mechanisms underlying normal and dysfunctional uterine contractions in labouring ewes. Significantly, ~20% of newborn lambs die within days of birth, costing the Australian sheep industry more than $780 million annually. Difficult lambing is the leading cause of lamb mortality and weak uterine contractions are the most important contributor to difficult labour (dystocia). Intended outcomes include a better understanding of dysfunctional labour contractions in sheep, and this knowledge could then contribute to the identification of more specific targets for genetic testing for dystocia. The benefits should include more specific aids for selective breeding programs for improved productivity and profitability.Read moreRead less
The Molecular Basis of Copper Metabolism in Sheep. The unusual copper metabolism of sheep represents a significant agricultural problem. They are very susceptible to copper deficiency, but readily accumulate copper to toxic levels in the liver leading to fatal liver failure. We propose to elucidate the reason for the copper accumulation phenotype of sheep. We are focussing on WND, a copper transporter responsible for copper excretion into bile. We discovered a novel form of sheep WND designated ....The Molecular Basis of Copper Metabolism in Sheep. The unusual copper metabolism of sheep represents a significant agricultural problem. They are very susceptible to copper deficiency, but readily accumulate copper to toxic levels in the liver leading to fatal liver failure. We propose to elucidate the reason for the copper accumulation phenotype of sheep. We are focussing on WND, a copper transporter responsible for copper excretion into bile. We discovered a novel form of sheep WND designated WNDb to distinguish it from the normal form, WNDa. The experiments outlined are designed to understand the function of both proteins in the sheep and their role in copper sequestration.Read moreRead less
Functional genomics of large clostridial plasmids. The aims of this genomics project are to determine how large DNA elements called plasmids are able to be transferred between different strains of a bacterium that causes disease in domestic livestock. These plasmids carry genes that encode the potent protein toxins that are responsible for several diseases. To understand how these diseases are spread we must learn how the plasmids have evolved and whether they can move from bacterium to bacteriu ....Functional genomics of large clostridial plasmids. The aims of this genomics project are to determine how large DNA elements called plasmids are able to be transferred between different strains of a bacterium that causes disease in domestic livestock. These plasmids carry genes that encode the potent protein toxins that are responsible for several diseases. To understand how these diseases are spread we must learn how the plasmids have evolved and whether they can move from bacterium to bacterium. The successful completion of the project will result in a detailed understanding of genetic elements that are important mediators of several diseases of importance to Australian primary industry.Read moreRead less
Endogenous and environmental regulation of energy expenditure in skeletal muscle. Circadian and seasonal cycles impact on body weight; night shift workers have disrupted light-dark cycles and are predisposed to obesity. The project will investigate effects of both short and long term changes in day length on energy expenditure in skeletal muscle. Furthermore, the project will investigate mechanisms that control energy expenditure in muscle.