The focus of this research is age-related hearing loss (presbyacusis). Currently, 28 million Americans have impaired hearing and approximately 75% of these persons are over the age of 55. The prevalence of presbyacusis will increase substantially by the year 2020. To meet the challenges of this most prevalent handicapping condition, new information, diagnostic methods, rehabilitation procedures, and cost-effective access to new technologies will be of great importance. Prevention of presbyacusis and a reduction in its prevalence are even greater challenges. The overall objective of our research program is to improve diagnostic, rehabilitative, and preventive measures. Toward this objective, four research projects are proposed. Project 1 addresses basic questions related to the understanding of speech and benefit of hearing aids in realistic listening environments by older adults. Project 2 is a neuroimaging study that examines the structure and function of neural elements that are hypothesized to contribute to age-related declines in speech recognition in older adults. Project 3 identifies specific alleles associated with age- related hearing loss in carefully selected candidate genes through genotype-phenotype association studies and initiates studies aimed at characterizing the histopathological changes associated with age-related hearing loss in general, and when known, with specific mutations. Project 4 determines the potential role of human hematopoietic stem cells in the maintenance of non-sensory cells in the inner ear and characterizes the effects of aging and cochlear injury on this process. In addition, two cores provide administrative, technical, and scientific support including recruitment of human subjects;collection and storage of human tissue;and collection, storage, and analysis of data. The proposed program of research on presbyacusis in the long term will influence health care of the presbyacusic patient, will affect care of hearing-impaired persons in general, and will have significant impact on theoretical and applied issues in the science of audition.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Specialized Center (P50)
Project #
5P50DC000422-25
Application #
8299411
Study Section
Special Emphasis Panel (ZDC1-SRB-S (01))
Program Officer
Cyr, Janet
Project Start
1997-07-01
Project End
2013-12-31
Budget Start
2012-08-01
Budget End
2013-12-31
Support Year
25
Fiscal Year
2012
Total Cost
$1,889,646
Indirect Cost
$826,720
Name
Medical University of South Carolina
Department
Otolaryngology
Type
Schools of Medicine
DUNS #
183710748
City
Charleston
State
SC
Country
United States
Zip Code
29425
Ben Said, Mariem; Grati, M'hamed; Ishimoto, Takahiro et al. (2016) A mutation in SLC22A4 encoding an organic cation transporter expressed in the cochlea strial endothelium causes human recessive non-syndromic hearing loss DFNB60. Hum Genet 135:513-24
Simpson, Annie N; Simpson, Kit N; Dubno, Judy R (2016) Higher Health Care Costs in Middle-aged US Adults With Hearing Loss. JAMA Otolaryngol Head Neck Surg 142:607-9
Kuchinsky, Stefanie E; Vaden Jr, Kenneth I; Ahlstrom, Jayne B et al. (2016) Task-Related Vigilance During Word Recognition in Noise for Older Adults with Hearing Loss. Exp Aging Res 42:50-66
Fogerty, Daniel; Ahlstrom, Jayne B; Bologna, William J et al. (2016) Glimpsing Speech in the Presence of Nonsimultaneous Amplitude Modulations From a Competing Talker: Effect of Modulation Rate, Age, and Hearing Loss. J Speech Lang Hear Res 59:1198-1207
Tekin, Demet; Yan, Denise; Bademci, Guney et al. (2016) A next-generation sequencing gene panel (MiamiOtoGenes) for comprehensive analysis of deafness genes. Hear Res 333:179-84
Svec, Adam; Dubno, Judy R; Nelson, Peggy B (2016) Inherent envelope fluctuations in forward maskers: Effects of masker-probe delay for listeners with normal and impaired hearing. J Acoust Soc Am 139:1195-203
Lang, Hainan; Nishimoto, Eishi; Xing, Yazhi et al. (2016) Contributions of Mouse and Human Hematopoietic Cells to Remodeling of the Adult Auditory Nerve After Neuron Loss. Mol Ther 24:2000-2011
Vaden Jr, Kenneth I; Kuchinsky, Stefanie E; Ahlstrom, Jayne B et al. (2016) Cingulo-Opercular Function During Word Recognition in Noise for Older Adults with Hearing Loss. Exp Aging Res 42:67-82
Vaden Jr, Kenneth I; Matthews, Lois J; Eckert, Mark A et al. (2016) Longitudinal Changes in Audiometric Phenotypes of Age-Related Hearing Loss. J Assoc Res Otolaryngol :
Jennings, Skyler G; Ahlstrom, Jayne B; Dubno, Judy R (2016) Effects of age and hearing loss on overshoot. J Acoust Soc Am 140:2481

Showing the most recent 10 out of 109 publications