Immunity To Colonising Bacteria Of The Respiratory Tract In Atopic And Non-atopic Children
Funder
National Health and Medical Research Council
Funding Amount
$246,478.00
Summary
Evidence that seemingly harmless and common bacterial infections have a role, in the development of allergic disease has been uncovered. The development of immune responses to these microbes will be studied in children with and without allergy to inhalant allergens.
Therapeutic Potential Of The IL-3-IL-5-GM-CSF Common Beta Receptor To Treat Upper And Lower Allergic Airway
Funder
National Health and Medical Research Council
Funding Amount
$150,442.00
Summary
This research aims to develop new treatments for allergic diseases such as asthma and allergic rhinitis, which remain significant public health problems in Australia. We will develop new therapies with the potential to completely suppress acute and chronic allergic disease targeting a common receptor protein that controls multiple facets of allergic inflammation. We will test antibodies intended to treat human asthma using a novel mouse strain expressing the human form of this receptor.
Studies On The Effects Of RSV Infection During Infancy On Aeroallergen-specific T-cell Immunity And Lung Function
Funder
National Health and Medical Research Council
Funding Amount
$130,475.00
Summary
Many infants who develop transient severe wheezing in association with respiratory infections, go on to develop asthma which can persist throughout childhood and some times into adult life. It is not known whether the respiratory infections are a direct cause of later asthma, or whether they simply function as flag which identifies children who have a genetic predisposition to wheeze e.g. because they have abnormally narrow airways. This project will compare the effects of respiratory infection ....Many infants who develop transient severe wheezing in association with respiratory infections, go on to develop asthma which can persist throughout childhood and some times into adult life. It is not known whether the respiratory infections are a direct cause of later asthma, or whether they simply function as flag which identifies children who have a genetic predisposition to wheeze e.g. because they have abnormally narrow airways. This project will compare the effects of respiratory infection in infants with the RSV virus, who contract the disease at different ages, and who have varying levels of genetic risk for respiratory allergies. In particular, it will examine the possibility that in certain cases, infection of genetically susceptible individuals during early infancy will boost the development of allergies to airborne environmental allergens (such as house dust mite) which are known to trigger asthma attacks in older children and adults.Read moreRead less
It is known that about 10% of patients over the age of 55 have difficulty with cognition and thinking 3 months after surgery and anaesthesia. Over 2 million operations involving anaesthesia are administered in Australia every year and increasingly the patients are elderly and thus exposed to the risk of cognitive decline after surgery. We have preliminary data showing that people who have mild changes in cognitive function before the surgery (known as mild cognitive impairment) are susceptible t ....It is known that about 10% of patients over the age of 55 have difficulty with cognition and thinking 3 months after surgery and anaesthesia. Over 2 million operations involving anaesthesia are administered in Australia every year and increasingly the patients are elderly and thus exposed to the risk of cognitive decline after surgery. We have preliminary data showing that people who have mild changes in cognitive function before the surgery (known as mild cognitive impairment) are susceptible to further cognitive decline after anaesthesia and surgery. In order to explore the relationship between preoperative cognitive function and postoperative cognitive decline we plan to measure cognition in patients scheduled for elective hip replacement surgery. This is done by asking patients to complete a standard battery of cognitive tests. We will be then able to identify those patients who already have mild cognitive impairment before surgery and by repeated testing after the operation will be able to demonstrate if preoperative cognitive status is a determinant of postoperative cognitive dysfunction. The primary aim of the research is to test whether cognitive impairment before surgery leads to cognitive deficit after surgery in patients over the age of 65 undergoing total hip replacement surgery. The study will also establish the prevalence of pre-operative mild cognitive impairment and the magnitude of postoperative cognitive dysfunction after surgery in this patient group. The study will explore the relationship between preoperative cognitive status and postoperative cognitive deficit , providing information about the incidence, natural history and risk factors of postoperative cognitive deficit. This work will enable further research to isolate specific causative factors and identify therapeutic and prophylactic strategies.Read moreRead less
Risk Assessment And Prevention Of Respiratory Complications In Paediatric Anaesthesia
Funder
National Health and Medical Research Council
Funding Amount
$494,253.00
Summary
Respiratory problems account for more than three quarters of all critical incidents and a third of all cardiac arrests in healthy children undergoing anaesthesia for surgical procedures. It is therefore vital to identify high risk children early to be able to adapt the anaesthesia regimen accordingly. This series of studies will study new prediction and prevention strategies to minimise respiratory problems and therefore improve the safety for our children when undergoing anaesthesia.
B-1 B Cells As A Source Of Polyreactive IgE Antibodies, In Allergic Individuals
Funder
National Health and Medical Research Council
Funding Amount
$331,320.00
Summary
Allergic disease results from the actions of antibody molecules that are produced by cells called B cells. Over the last fifteen years, it has been realised that there are at least two B cell subsets, called B-1 and B-2 cells. The B-1 cells and their antibody products have many unusual features, and they have been implicated in some disease processes. We have recently completed studies that strongly suggest that B-1 B cells may play an important role in some allergic disease. We wish to compare ....Allergic disease results from the actions of antibody molecules that are produced by cells called B cells. Over the last fifteen years, it has been realised that there are at least two B cell subsets, called B-1 and B-2 cells. The B-1 cells and their antibody products have many unusual features, and they have been implicated in some disease processes. We have recently completed studies that strongly suggest that B-1 B cells may play an important role in some allergic disease. We wish to compare groups of patients defined according to their allergic conditions and age, to see whether B-1 B cell activity is associated with particular allergic diseases. We hypothesise that patients with allergic skin conditions have raised numbers of allergy-inducing B-1 cells. Such patients will be compared with those with allergies to inhalent allergens and others with food allergies. Studies will be performed in adult groups as well as in children, for B-1 B cell numbers are known to vary with age. As most of our understanding of the regulation of B cell function, in the context of allergic disease, has arisen from studies conducted with conventional B-2 cells, we also wish to reconsider aspects of B cell regulation. We are specifically interested in the regulation of the 'switching' of B-1 B cells, when they change from the production of antibodies of a 'non-allergic' type (IgM antibodies) to allergy-promoting IgE antibodies. We wish to determine whether the B-1 B cells of allergic individuals are particularly susceptible to such switching, when under the influence of regulatory molecules called cytokines. We expect that B-1 B cells will be associated with some, though not all allergic conditions, and that these cells will emerge as a new target for therapies. Such a finding would be most important. The development of new therapies will require a better understanding of the regulation of these cells, and this will be another important outcome of this project.Read moreRead less
‘Granny was never the same after her operation’ is a strong public perception. These reports of persistent memory and concentration loss following surgery are now supported by a body of scientific research recording an incidence of ‘postoperative cognitive decline’ (POCD) as high as 75% in cardiac surgery patients. At present the cause is unknown but recently anaesthesia has been implicated. Our research team will investigate these claims.
Mechanisms And Treatment Of Early Life Chlamydial Infection And Associated Asthma
Funder
National Health and Medical Research Council
Funding Amount
$616,195.00
Summary
Asthma is a serious respiratory disease that results from certain immune responses to allergens and there are no cures. Immune responses and lung structure may be permanently altered by respiratory chlamydial infection early in life that leads to reduced lung function and asthma but how this occurs is unknown. In this project we will determine how early life infections affect immune responses, lung function and asthma and test novel treatments and preventions for infection-associated asthma.
Initiating Events In The Development Of Allergic Airway Inflammation
Funder
National Health and Medical Research Council
Funding Amount
$452,545.00
Summary
Despite recent advances we still do not understand the basic mechanisms which underlie the development of allergic airway inflammatory diseases such as rhinitis and asthma. It has been previously shown that when pollen are exposed to water they release a large number of very small starch granules which contain a number of potent allergens as well as plant steroids. In addition house dust mite allergens which are strongly associated with asthma are mostly located in small faecal pellets. Both the ....Despite recent advances we still do not understand the basic mechanisms which underlie the development of allergic airway inflammatory diseases such as rhinitis and asthma. It has been previously shown that when pollen are exposed to water they release a large number of very small starch granules which contain a number of potent allergens as well as plant steroids. In addition house dust mite allergens which are strongly associated with asthma are mostly located in small faecal pellets. Both these particles are ideally sized to enter the respiratory tract and initiate inflammatory responses. We have shown that these responses appear to be of the type that is needed to initiate allergic reactions. We intend to further study the interactions of these small inhaled allergen containing particles with cells of the respiratory tract. In this proposal we will look at both alveolar macrophages and respiratory epithelial cells. These approaches will not only provide new information about the processes of airway inflammation caused by allergens but may also define new therapeutic approaches to the treatment of these diseases.Read moreRead less