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Investigating The Role Of SERPINB6 In Cochlear Function And Deafness
Funder
National Health and Medical Research Council
Funding Amount
$570,803.00
Summary
In 2010 a novel genetic mutation was identified that causes progressive hearing loss in humans, however, it was not established why this mutation leads to the disease. We propose that the mutation renders cells of the inner ear more susceptible to death caused by noise trauma. We will investigate this in a mouse model of the human condition. This could lead to the development of therapies that prevent hearing loss.
Early Indicators Of Noise Injury: Are Decreased Auditory Processing Skills Evident In Noise-exposed Adults Prior To Diagnosis Of Hearing Loss?
Funder
National Health and Medical Research Council
Funding Amount
$367,605.00
Summary
Recent research indicates that noise-exposed individuals with similar hearing thresholds to non-noise exposed counterparts are more likely to have diminished temporal and spectral auditory processing abilities. This research aims to determine the relationship between noise exposure levels and auditory processing difficulties; the influence of musical training in ameliorating these difficulties; and a neurological model of causation, operation and possible remediation of these difficulties.
Cochlear Type II Neurons In Contralateral Suppression
Funder
National Health and Medical Research Council
Funding Amount
$459,434.00
Summary
Sound in one ear affects hearing in the other ear. This contralateral suppression is important for hearing attention and protection from noise damage. We will test the hypothesis that cochlear type II sensory neurons provide the sensory input for this process using models where neuronal development is altered, or the neurons are removed. The study addresses hearing disability in society, facilitating cochlear prosthesis development and the understanding of hearing loss.
Studies Of The Effects Of Asymmetric Hearing Loss On The Brain
Funder
National Health and Medical Research Council
Funding Amount
$920,076.00
Summary
Hearing loss impairs the normal development and maintenance of auditory pathways. Irreversible pathologies persist when hearing is not restored in a timely manner. While cochlear implantation is the accepted treatment for profound sensorineural hearing loss, there is significant variability in outcomes. Some of this variability is linked to the degree of hearing asymmetry. Thus, we propose to study brain changes in the auditory system that accompany asymmetric hearing impairment.
Intrinsic Hearing Protection Mechanisms: A Pathway To Prevention Of Noise-induced Hearing Loss
Funder
National Health and Medical Research Council
Funding Amount
$625,900.00
Summary
Noise-induced hearing loss (NIHL) is a significant contributor to the total burden of disease. We recently determined that when the ear is exposed to sustained noise, the cochlea is protected from damage by activation of a specific (P2X2) receptor, evident as reversible hearing adaptation. This study will determine the downstream signalling from this receptor. This will support assessment of vulnerability to NIHL and contribute to development of hearing therapeutics.
Optimising Balance Function In Vestibular Schwannoma
Funder
National Health and Medical Research Council
Funding Amount
$271,817.00
Summary
This project examines human balance function in subjects with vestibular Schwannoma, a slow growing tumor that presents with hearing loss and imbalance. We will measure inner ear balance function using 2 new non invasive tests called the video head impulse and the vestibular evoked myogenic potential. We will seek test parameters that predict tumor growth, explore reasons for post surgical imbalance, develop and validate home-based rehabilitation methods to optimise balance after surgery.
Delayed Loss Of Acoustic Hearing After Cochlear Implantation: Mechanisms And Clinical Identification With New Cochlear Implant Technology
Funder
National Health and Medical Research Council
Funding Amount
$1,040,157.00
Summary
Natural hearing can be combined with a cochlear implant to improve sound quality and speech understanding. However, natural hearing frequently deteriorates weeks to months after cochlear implantation. This seems to occur when cochlear fluid buildup (hydrops) or fibrosis within the inner ear disrupts cochlear mechanics. We plan to monitor these processes in patients by recording directly from the cochlear implant, and conduct laboratory experiments to find therapies to alleviate their effects.
Nanoengineered Drug Delivery To The Inner Ear To Prevent Progressive Hearing Loss
Funder
National Health and Medical Research Council
Funding Amount
$479,056.00
Summary
Hearing loss is a common sensory deficit and can get progressively worse over time, eventually requiring a cochlear implant. In this project we will examine the effectiveness of a new technique that uses nanoengineered particles to provide long term and controlled delivery of drugs in order to prevent progressive hearing loss and protect residual hearing following cochlear implantation. We will develop the next generation of nanotechnology to enhance drug delivery in pathological ears.
Innovative Diagnosis For And Prevention Of Otitis Media In Australian Infants
Funder
National Health and Medical Research Council
Funding Amount
$439,476.00
Summary
Otitis media (OM) in infants is a major health issue, with the affected infants having high risk of chronic illness, hearing loss and speech and language delay. Preventing OM in infants requires accurately diagnosing and determining the causes of OM. This project employs an innovative technology to diagnose OM in infants and determine the risk factors for OM in Australian infants.
Gene Therapy For Preventing Progressive Sensorineural Hearing Loss And Restoring Hearing
Funder
National Health and Medical Research Council
Funding Amount
$549,848.00
Summary
This proposal aims to study the clinical feasibility and safety of gene therapy in the guinea pig cochlea for preventing progressive hearing loss and restoring hearing. Two cell survival genes (GDNF and BDNF) will be studied for preserving sensory (hair) cells and hearing nerves, while a gene called Atoh1 will be investigated for its ability to regenerate new hair cells and restore hearing after the onset of progressive hearing loss.