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Using Health Outcome Data From Pooled Longitudinal Studies Of Ageing To Develop Statistical And Microsimulation Models T
Funder
National Health and Medical Research Council
Funding Amount
$2,162,630.00
Summary
This project draws together data from nine Australian Longitudinal Studies of Ageing (LSAs), including 53484 participants, that will be used to identify factors capable of preventing disease, reducing ill-health, and promoting engaged and successful ageing for Australians. The focus is upon conditions that significantly contribute to the burden of disease including cognitive decline and dementia, sensory impairment, impairment in mobility and common mental disorders such as depression. Although ....This project draws together data from nine Australian Longitudinal Studies of Ageing (LSAs), including 53484 participants, that will be used to identify factors capable of preventing disease, reducing ill-health, and promoting engaged and successful ageing for Australians. The focus is upon conditions that significantly contribute to the burden of disease including cognitive decline and dementia, sensory impairment, impairment in mobility and common mental disorders such as depression. Although individual studies contain rich data on particular topics, there is only a small number of individuals in each study with specific medical conditions, or combinations of different conditions, especially at the older ages. Pooling data from nine studies will overcome this problem. This innovative and interdisciplinary study also involves development of the first Australian dynamic micro-simulation model of the health and social outcomes of the baby boomer and older cohorts. The simulation will allow for evaluation of the impact of modifying risk factors, and costs associated with different trajectories of health and ageing. Our program takes an interdisciplinary life course approach, incorporating interdependencies among demographic, behavioural, social, economic and health factors. Our multidisciplinary team and collaborative pooling of existing studies adds value and builds upon experience, as recommended in the Prime Minister's Science, Engineering and Innovation Council 2003 report. The outcomes will direct health and social policy to promote health behaviour, and social and medical interventions to compress morbidity and optimize healthy ageing in Australian society over the next 40 years.Read moreRead less
Blue Mountains Cohort Study: Long-term (15-year) Incidence Of Eye Disease, Hearing Loss And Other Public Health Outcomes
Funder
National Health and Medical Research Council
Funding Amount
$837,919.00
Summary
The Blue Mountains Eye Study 15-year study will re-examine survivors of the 3,654 persons who participated in baseline BMES exams, to determine the long-term development and progression of sensory problems, including vision and hearing loss and eye diseases like macular degeneration, glaucoma, cataract or diabetic eye damage. The project will assess whether vascular conditions like high blood pressure, chronic medical conditions, medications, smoking, diet, blood, family and genetic factors pred ....The Blue Mountains Eye Study 15-year study will re-examine survivors of the 3,654 persons who participated in baseline BMES exams, to determine the long-term development and progression of sensory problems, including vision and hearing loss and eye diseases like macular degeneration, glaucoma, cataract or diabetic eye damage. The project will assess whether vascular conditions like high blood pressure, chronic medical conditions, medications, smoking, diet, blood, family and genetic factors predict the risk or age at onset of eye disease or hearing loss. We will assess impacts of vision and hearing loss on independence, falls, quality of life and development of memory loss and depression. This information will help to develop services, and to plan interventions to prevent and treat these conditions. Because of the exponential age-related increase in frequency of these diseases, this long follow-up will provide more disease events, and a longer interval to assess impacts from the exposures we measured when we started the BMES in 2002. It will enable us to estimate the strength of risk factors for eye disease and hearing loss with greater precision, essential to understand their evolution. Surviving participants from the original BMES will be invited to attend follow-up exams at our Katoomba clinic, or to attend mobile- nursing home exams. We will conduct similar exams to those previously to detect new or worsened eye disease or hearing loss. In 2002-4, we saw 82% of the population of 2 Blue Mountains postcodes aged 50 or older. At the 5- and 10-year exams we saw 75% of people still living. We expect the same proportion to participate this time. The BMES is one of Australia's main cohort studies with over 200 publications. It has yielded key findings on the frequency and causes of the major diseases threatening vision and hearing. Longer follow-up will greatly increase our power to detect predictors of these key age-dependent conditions.Read moreRead less
The Role Of Mitochondrial DNA In Age-related Hearing Loss
Funder
National Health and Medical Research Council
Funding Amount
$260,475.00
Summary
Hearing loss is an extremely common and under-studied age-related disability, affecting 39% of Australians aged 50 years or older. Both genetic and environmental factors may contribute to the development of age-related hearing loss. Human genetic material (DNA) resides in two places in body cells; the nucleus and in organelles called mitochondria. This is due to the fact that mitochondria were derived from bacteria that were engulfed by the cell back in primordial life. Although this genetic mat ....Hearing loss is an extremely common and under-studied age-related disability, affecting 39% of Australians aged 50 years or older. Both genetic and environmental factors may contribute to the development of age-related hearing loss. Human genetic material (DNA) resides in two places in body cells; the nucleus and in organelles called mitochondria. This is due to the fact that mitochondria were derived from bacteria that were engulfed by the cell back in primordial life. Although this genetic material is different to nuclear DNA, it has an essential role in helping to provide energy for the cell. Genetic mutations in the DNA residing in the mitochondria have been associated with a number of conditions, usually affecting tissues that require large amounts of energy, such as the brain, muscle, heart, retina and the cochlea of the ear. The commonest clinical manifestation of mitochondrial disease is thought to be hearing loss. This project investigates the role that abnormal mitochondrial DNA plays in the development of hearing impairment by studying subjects from a representative Australian community who participated in a large population study of hearing loss. We will assess whether different sectors of mitochondrial DNA predispose particular individuals to the development of hearing loss or accelerate its onset. The Blue Mountains Hearing Study is able to take into account other factors known to be associated with hearing loss (industrial noise exposure, diabetes, smoking).Read moreRead less
Translating Genetic Determinants Of Glaucoma Into Better Diagnosis And Treatment
Funder
National Health and Medical Research Council
Funding Amount
$9,466,000.00
Summary
Glaucoma is the leading cause of irreversible blindness worldwide. By 2020, it will affect 80 million people, and in Australia over the next decade, the overall cost of glaucoma will reach $4.3 billion per annum. This Program will use genetic advances to personalise treatment. Blindness will be prevented in individuals at highest risk, new ways to treat patients will be developed, and better outcomes for patients will result from less treatment and monitoring of low risk cases.
Neuro-feedback For Improved Efficacy Of Retinal Prostheses
Funder
National Health and Medical Research Council
Funding Amount
$653,655.00
Summary
Bionic eyes offer the possibility to return sight to the blind. Existing retinal implants are effective at delivering basic visual percepts, namely brief spots of light. Our team is now working on building the second generation of bionic eyes that include the ability to both stimulate the visual system (the retina) and record its response. By recording the evoked responses, we can adjust and optimize the stimulation to restore a persistent high spatial resolution sense of vision to the blind.
Young Adult Myopia: Genetic And Environmental Associations
Funder
National Health and Medical Research Council
Funding Amount
$809,271.00
Summary
Myopia affects 80% of school leavers in the cities of East Asia, 45% of Asian Australian school leavers and is probably on the rise in European Australian adolescents. Increased levels of education and lack of time outdoors are known to increase the risk of myopia. We will examine 2,000 young adults to find the genes that interact with these risk factors. In addition to confirming when these risk factors are most important, identifying molecular pathways opens the avenue of new treatments.
Improving Music Appreciation For People With Prosthetic Hearing Devices By Enhancing Auditory Stream Segregation
Funder
National Health and Medical Research Council
Funding Amount
$266,560.00
Summary
Music perception is one of the most often-cited problems for people with hearing aids or cochlear implants. Part of the problem is related to the reduced ability to hear different instruments or melodic lines separately. This ability is based on perceptual differences between auditory streams. Psychophysics experiments will be performed to understand the effect of different acoustic parameters on auditory streaming. An innovative approach to restore music appreciation will be tested on people wi ....Music perception is one of the most often-cited problems for people with hearing aids or cochlear implants. Part of the problem is related to the reduced ability to hear different instruments or melodic lines separately. This ability is based on perceptual differences between auditory streams. Psychophysics experiments will be performed to understand the effect of different acoustic parameters on auditory streaming. An innovative approach to restore music appreciation will be tested on people with impaired hearing.Read moreRead less
This project will provide comprehensive nationally-representative data on the issue of hearing loss at work. We will undertake a large national survey to determine how many Australians are exposed to noise and ototoxic chemicals in the workplace and will use these data to estimate the future burden of work-related hearing loss. We will also estimate how changes in the use of noise control measures could alter the burden and the costs.
A System For Measurement Of Vision-specific Quality Of Life Using Item Banking And Computer Adaptive Testing (ViSBank)
Funder
National Health and Medical Research Council
Funding Amount
$831,155.00
Summary
When evaluating medical treatments, it is important to consider all effects from the patient’s perspective; their quality of life. This project utilises new technology to develop an adaptable, computerised, internet-based system to measure the effects of eye diseases and their treatments on patients’ quality of life. This system will provide for more accurate, precise and efficient measurement than existing methods.
The Role Of Proteases In Deafness; Generation Of A Knockout Mouse For Tmprss3 As A Model Of Autosomal Recessive Deafness
Funder
National Health and Medical Research Council
Funding Amount
$70,880.00
Summary
Age-related hearing loss is the most common type of human hearing impairment, affecting approximately half the population by the age of 80. The interaction of predisposing genetic factors with environmental factors is responsible for most age-related hearing loss. Genes underlying genetically inherited hearing impairment also affect susceptibility to age-related hearing loss. Approximately 1-1000 children are born deaf and ~50% of these cases have a genetic cause. Autosomal recessively-inherited ....Age-related hearing loss is the most common type of human hearing impairment, affecting approximately half the population by the age of 80. The interaction of predisposing genetic factors with environmental factors is responsible for most age-related hearing loss. Genes underlying genetically inherited hearing impairment also affect susceptibility to age-related hearing loss. Approximately 1-1000 children are born deaf and ~50% of these cases have a genetic cause. Autosomal recessively-inherited defects are responsible for most cases of genetic deafness (70%) and patients have no other medical problems, indicating that only the inner ear is affected. Genes previously identified for genetic forms of deafness can be broadly classified as either ion channels (e.g. connexins) or structural proteins (e.g. myosins and collagens). We recently identified a novel gene, a transmembrane serine protease, TMPRSS3, which is mutated both in familial and sporadic cases of deafness. Different classes of mutations may cause either deafness from birth or childhood onset deafness. Thus, reduced expression or abnormal function of TMPRSS3 may be involved in age-related hearing loss. This discovery was the first description of a protease involved in hearing loss and the first gene family involved in congenital deafness for which a ready hypothesis for involvement in age-related hearing loss can be made. We will generate and characterize a mouse model to investigate the role of TMPRSS3 in inner ear function and development. We will also isolate and characterize additional members of the transmembrane protease gene family to investigate further the role of proteases in both genetic and age-related hearing loss. This may lead to a greater understanding of the function of the auditory system and, eventually, to new therapeutic protocols.Read moreRead less