This research addresses the need for innovative bioreactor design. Bioreactors are laboratory systems that precisely control mechanical forces and environmental conditions on biologically changing tissues for periods of several hours to many days. Some bioreactors can also measure mechanical response of the living tissues during incubation. The ear, the voice, and the skin are exposed to vibrations throughout life. Approximately 28 million Americans suffer from hearing loss, the nation's 4 million teachers are 32 times more likely to suffer from voice problems than other professionals, and tens of thousands suffer injuries from repetitive motion exposure. In contrast, mounting evidence suggests beneficial effects of vibration for building bone and muscle tissue and as a positive neuropharmacological therapeutic technique for reducing pain. The underlying hypothesis is that conditioning engineered tissues at quantifiable physiologic vibrations will improve their functionality when transplanted into patients. This new bioreactor targets a rather difficult frequency range of 10 - 10000 Hz at amplitudes from millimeters to nanometers that are physiologically relevant to vocalization, hearing, and skin vibration. It incorporates high precision technology of a stress controlled electromagnetic and piezoelectric rheometer for both vibration delivery and linear viscoelastic measurement of tissues in the frequency range of 0.01 - 2000 Hz.

Public Health Relevance

TO PUBLIC HEALTH: Millions of Americans suffer from hearing loss, voice problems or repetitive motion injuries. Conditioning engineered tissues at sonic physiologic vibrations is believed to improve their functionality when transplanted into patients. Instruments called bioreactors, uniquely designed for the purpose of growing ear, voice and skin tissues, exposing the tissues to vibration, and quantifying their mechanical response, are needed to investigate the potential public health benefits of such treatment.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Research Project (R01)
Project #
5R01DC010275-02
Application #
7915493
Study Section
Special Emphasis Panel (ZEB1-OSR-D (J1))
Program Officer
Shekim, Lana O
Project Start
2009-09-01
Project End
2012-08-31
Budget Start
2010-09-01
Budget End
2012-08-31
Support Year
2
Fiscal Year
2010
Total Cost
$703,875
Indirect Cost
Name
University of Utah
Department
Type
DUNS #
009095365
City
Salt Lake City
State
UT
Country
United States
Zip Code
84112
Titze, Ingo R; Klemuk, Sarah; Lu, Xiaoying (2014) Preliminary experiments to quantify liquid movement under mimetic vocal fold vibrational forces. Logoped Phoniatr Vocol 39:50-5
Klemuk, Sarah A; Riede, Tobias; Walsh, Edward J et al. (2011) Adapted to roar: functional morphology of tiger and lion vocal folds. PLoS One 6:e27029