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Impact Of DTP Schedules On The Immunogenicity Of 2 Doses Of 13v-PCV Followed By An Early Booster
Funder
National Health and Medical Research Council
Funding Amount
$2,651,687.00
Summary
This project aims to come up with a vaccination schedule to make pneumococcal vaccines more effective and affordable for Fiji and other developing countries. We will evaluate schedules involving a 2 dose primary series in early infancy with a booster at 9 months of age. We will compare the immune responses to 3 different primary series and 2 booster options. The results of this project will be used to provide advice, at global and country levels, regarding introduction of pneumococcal vaccines.
Clinical Impact Of Clonal Pseudomonas Aeruginosa In Cystic Fibrosis
Funder
National Health and Medical Research Council
Funding Amount
$547,238.00
Summary
In patients with cystic fibrosis (CF), the normal defence mechanisms are compromised by an inherent genetic fault which results in an extremely sticky and dehydrated mucus. The respiratory system is unable to eradicate microbes (infection) from the lungs of patients with CF which begin to multiply and cause infection and inflammation. Recurring infections are treated with multiple courses of antibiotics and frequent hospitalisation and eventually result in premature death. This study focuses on ....In patients with cystic fibrosis (CF), the normal defence mechanisms are compromised by an inherent genetic fault which results in an extremely sticky and dehydrated mucus. The respiratory system is unable to eradicate microbes (infection) from the lungs of patients with CF which begin to multiply and cause infection and inflammation. Recurring infections are treated with multiple courses of antibiotics and frequent hospitalisation and eventually result in premature death. This study focuses on the major bacterial problem, Pseudomonas aeruginosa. Several studies from Australia and the UK, including our own have shown that about 30% to 45% of patients share the same strain of Pseudomonas aeruginosa within a centre. We know that two dominant strains of Pseudomonas aeruginosa are found in CF centres on the eastern board of Australia. This is unexpected as this bacterium is usually acquired from the environment. The emergence of these clonal strains is causing increasing anxiety in the CF community. This study is designed to provide vitally needed information on the clinical implications of being infected by an clonal strain of Pseudomonas aeruginosa and the risk factors for the acquisition of an clonal strain. This new information will provide a rationale basis for the need for changes to infection control policies (including patient segregation), better outcome predictors for patients infected with clonal strain of Pseudomonas aeruginosa.Read moreRead less
How Do Thick Airway Walls Affect Airway Hyperresponsiveness In Asthma?
Funder
National Health and Medical Research Council
Funding Amount
$382,538.00
Summary
Asthmatic airways narrow too easily, a characteristic called airway hyperresponsiveness (AHR). To understand the cause of asthma we need to understand the cause of AHR. Thickened airway walls could amplify airway narrowing and increase AHR. However, thick airway walls are also stiff, and stiff walls could reduce narrowing and AHR. This project will examine the relationships between AHR and airway wall thickness and stiffness during and after treatment that reduces airway wall thickness.
Mechanisms Of Oxidised Protein Accumulation In Ageing Cells
Funder
National Health and Medical Research Council
Funding Amount
$429,000.00
Summary
Australia has one of the world's most rapidly ageing populations. It is estimated that in 30 years time over 30% of the population will be over 65; many will suffer from a debilitating, age-related disease. The diseases of ageing represent one of the major health challenges this century. Despite their increasing incidence, our understanding of the underlying causes is limited. A common feature is the accumulation of damaged proteins in cells and tissues. Damaged proteins are usually broken down ....Australia has one of the world's most rapidly ageing populations. It is estimated that in 30 years time over 30% of the population will be over 65; many will suffer from a debilitating, age-related disease. The diseases of ageing represent one of the major health challenges this century. Despite their increasing incidence, our understanding of the underlying causes is limited. A common feature is the accumulation of damaged proteins in cells and tissues. Damaged proteins are usually broken down by the cells and replaced, but in many age-related diseases this process fails. The most common source of protein damage is attack by oxygen-derived free radicals. These are by-products of our body's need for oxygen and can originate from atmospheric pollutants. Oxygen rusts metal, makes fat go rancid and can cause irreparable damage to proteins and other biological molecules. Free radical damage contributes to the development of many age-related diseases such as atherosclerosis and neurodegenerative diseases such as Alzheimer's disease. The accumulation of damaged proteins can cause cell death. Our knowledge of the mechanisms by which cells remove proteins damaged by oxygen and the reasons for their accumulation is limited. In this project we will use a novel technique we have developed to generate oxidised proteins in ageing cells. We will identify cellular mechanisms required for the efficient removal of damaged proteins and those mechanisms which fail in ageing cells. We will focus on a group of proteins which protect damaged proteins from aggregating and accumulating and we will examine how we can prevent the accumulation of oxidised proteins by stimulating the body s defence mechanisms. Since the population of Australia is ageing, diseases of ageing are going to consume an increasing amount of the national health budget. A better knowledge of these cellular mechanisms will allow us to design effective prevention and treatment strategies which are at present lacking.Read moreRead less
THE BAROREFLEX IN SNORING AND THE OBSTRUCTIVE SLEEP APNOEA HYPOPNOEA SYNDROME
Funder
National Health and Medical Research Council
Funding Amount
$436,261.00
Summary
The obstructive sleep apnoea hypopnoea syndrome (OSAHS) refers to a condition in which throat blockage occurs during sleep leading to breathing difficulties, including snoring and cessation of breathing for short periods of time. OSAHS is amongst the commonest of chronic disorders of adult males, occuring in 5% of men over the age of 45 years. It is now recognised that one of the major complications of OSAHS is the development of high blood pressure and heart disease. In the proposed studies, we ....The obstructive sleep apnoea hypopnoea syndrome (OSAHS) refers to a condition in which throat blockage occurs during sleep leading to breathing difficulties, including snoring and cessation of breathing for short periods of time. OSAHS is amongst the commonest of chronic disorders of adult males, occuring in 5% of men over the age of 45 years. It is now recognised that one of the major complications of OSAHS is the development of high blood pressure and heart disease. In the proposed studies, we will examine the proposal that snoring alone, without significant associated OSAHS, can also lead to high blood pressure in habitual snorers both awake and asleep. In particular, we will explore the hypothesis that chronic snoring transmits a pressure wave through the tissues of the neck to the carotid artery which is the main blood supply to the brain. We propose that the chronic vibration of this artery can alter pressure sensors in the artery wall, which then results in the persistance of high blood pressure. Our studies will help to prove that this is a mechanism whereby both snoring and OSAHS may contribute to the development of high blood pressure. The recognition of snoring as an independent risk factor for high blood pressure will clearly have important and wide ranging implications for the future management of snoring in the prevention of high blood pressure.Read moreRead less
NEU-HORIZONS: The Neuroprotection And Therapeutic Use Of Riluzole For The Prevention Of Oxaliplatin Neurotoxicity Study.
Funder
National Health and Medical Research Council
Funding Amount
$382,402.00
Summary
Colorectal cancer is the second most commonly diagnosed cancer in Australia, with more than 13500 cases recorded annually. Oxaliplatin is an effective chemotherapy for the treatment of colorectal cancer. The major side-effect of oxaliplatin is the development of nerve damage that leads to loss of feeling in the hands and feet and significant disability. The aim of this study is to conduct a trial of a new treatment for oxaliplatin-induced nerve damage.
Surveillance Of LGV Chlamydia Trachomatis Types Among Men Who Have Sex With Men (MSM)
Funder
National Health and Medical Research Council
Funding Amount
$194,875.00
Summary
Chlamydia is a common sexually transmitted infection (STI) caused by the bacterium, Chlamydia trachomatis (CT). Annually, 50 million new cases of chlamydia are estimated to occur worldwide which if untreated, can lead to serious complications such as pelvic inflammatory disease and infertility in women and epididymitis in men. Over the past decade, there has been a sharp increase in diagnoses of chlamydia in Australia, coinciding with a reported upsurge in sexual risk behaviour (increased partne ....Chlamydia is a common sexually transmitted infection (STI) caused by the bacterium, Chlamydia trachomatis (CT). Annually, 50 million new cases of chlamydia are estimated to occur worldwide which if untreated, can lead to serious complications such as pelvic inflammatory disease and infertility in women and epididymitis in men. Over the past decade, there has been a sharp increase in diagnoses of chlamydia in Australia, coinciding with a reported upsurge in sexual risk behaviour (increased partner numbers and-or practices of unprotected sex), particularly among men who have sex with men (MSM). In addition, there are current outbreaks of an invasive CT strain, causing lymphogranuloma venereum (LGV), throughout Western Europe, with cases now reported in the USA. LGV can lead to severe anogenital ulcers, which can increase transmission of HIV, hepatitis C, and other STIs. With growing international travel, the likelihood of LGV outbreaks in Australia, particularly in MSM, is increased. Recently, isolated cases of LGV have been noted in MSM attending Sydney and Melbourne Sexual Health Centres, indicating LGV is possibly already in circulation. Since we know little about circulating CT types in Australia it would be difficult to assess the burden of an LGV outbreak. Due to increasing CT infections and likely risk of increased HIV transmission, particularly with LGV strains, surveillance of CT genotypes in Australia, especially in MSM, is important. The purpose of this study is to type CT strains in our population by looking at their genetic makeup. CT-positive specimens from Melbourne and Sydney will be used to identify CT types in circulation and to assess if LGV types are present. The knowledge obtained from this study will be novel and invaluable, and could contribute considerably to the development of improved disease prevention and intervention strategies, including the design of vaccines.Read moreRead less
Mechanisms Of Proteolysis Of Proteins Containing Oxidised Amino Acids
Funder
National Health and Medical Research Council
Funding Amount
$406,320.00
Summary
There is evidence that during ageing, and age-related diseases, proteins which have been chemically modified by oxidation accumulate in the body, and may have deleterious effects. Oxidation of proteins is a process akin to that by which fats go rancid. It has been demonstrated by the applicants to be an important process in formation of cataracts, and in development of the blood vessel disease, atherosclerosis, which is responsible for most heart attacks and stroke. Other important age-related d ....There is evidence that during ageing, and age-related diseases, proteins which have been chemically modified by oxidation accumulate in the body, and may have deleterious effects. Oxidation of proteins is a process akin to that by which fats go rancid. It has been demonstrated by the applicants to be an important process in formation of cataracts, and in development of the blood vessel disease, atherosclerosis, which is responsible for most heart attacks and stroke. Other important age-related diseases, such as Alzheimer s disease and other neurological disorders, are also claimed to be associated with deranged protein oxidation, and accumulation of oxidised products. There is clear evidence that certain defensive mechanisms, such as those acting to remove invading organisms and clear wounds, are also associated with an enhanced production of oxidised proteins. Perhaps the most important component of defense against oxidised proteins is their removal by complete breakdown to constituent components, and excretion. Normally, the machinery for breakdown of proteins is in vast excess over the required rate of degradation. However, clearly in these conditions of accumulation of oxidised proteins, this is no longer the case, or no longer suffices. Mechanisms by which oxidised proteins are degraded are poorly understood, and quite controversial. Therefore, the present studies bring to bear a new approach to studying this issue, which has been developed by the applicants. The aim is to reveal mechanisms involved in the breakdown of proteins containing oxidised amino acids, both in cellular systems, and in vivo. Such an understanding may allow us to envisage how to remove oxidised proteins by therapeutic means and therefore interfere with the development of age-related diseases such as Alzheimer s disease and cataract formation and the diseases of the blood vessels associated with attack and stroke.Read moreRead less
A Case-control Study Of Rotavirus Vaccine Effectiveness Against Gastroenteritis Hospitalisation Of Children In The NT
Funder
National Health and Medical Research Council
Funding Amount
$465,859.00
Summary
Almost 1 out of 5 children in remote Aboriginal communities are hospitalised with diarrhoea caused by rotavirus. This study will evaluate the impact of rotavirus vaccination in preventing these hospitalisations. In addition to making sure that vaccination works and that those at highest risk are receiving the benefits, it will assess the indirect impact against other causes of diarrhoea providing, critical information relevant to the vaccine's broader introduction in developing country settings.