Dietary vitamin E protects the fathead minnow, Pimephales promelas, against noise exposure

Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP
Amy R ScholikHong Y Yan

Abstract

The fathead minnow (Pimephales promelas) was employed to examine if dietary vitamin E supplementation could protect the inner ear from the deleterious effects of noise. Fish were fed one of the three experimental diets containing either: (1) low vitamin E content (14.5 mg/kg diet as alpha-tocopheryl acetate), (2) an adequate amount of vitamin E (50 mg/kg), or (3) high vitamin E content (450 mg/kg). After 4 weeks on the diet, fish were exposed to either 2 or 24 h of intense white noise (142 dB re: 1 microPa, bandwidth 0.3-4.0 kHz). Auditory thresholds were measured, using the auditory brainstem response (ABR) technique, within 0.5 days following noise exposure or within a recovery period of 1.5 days. Additionally, liver samples were analyzed for vitamin E content. Increased vitamin E supplementation was dose-dependently associated with a reduction in statistically significant threshold shifts after noise exposure and an enhancement of recovery (i.e., more complete recovery over a shorter period) for fish exposed to either 2 or 24 h of noise. The results obtained suggest that dietary vitamin E affords protection against noise exposure in a cyprinid fish.

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Citations

Nov 17, 2010·Journal of Fish Biology·C K-C WenB K K Chan
Dec 5, 2019·The Journal of the Acoustical Society of America·Christopher Spankovich, Colleen G Le Prell

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