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KMID : 0892920220310040232
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Experimental Neurobiology
2022 Volume.31 No. 4 p.232 ~ p.242
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A Review on Peripheral Tinnitus, Causes, and Treatments from the Perspective of Autophagy
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Vijayakumar Karthikeyan A.
Cho Gwang-Won
Maharajan Nagarajan
Jang Chul-Ho
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Abstract
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Tinnitus is the perception of phantom noise without any external auditory sources. The degeneration of the function or activity of the peripheral or central auditory nervous systems is one of the causes of tinnitus. This damage has numerous causes, such as loud noise, aging, and ototoxicity. All these sources excite the cells of the auditory pathway, producing reactive oxygen species that leads to the death of sensory neural hair cells. This causes involuntary movement of the tectorial membrane, resulting in the buzzing noise characteristic of tinnitus. Autophagy is an evolutionarily conserved catabolic scavenging activity inside a cell that has evolved as a cell survival mechanism. Numerous studies have demonstrated the effect of autophagy against oxidative stress, which is one of the reasons for cell excitation. This review compiles several studies that highlight the role of autophagy in protecting sensory neural hair cells against oxidative stress-induced damage. This could facilitate the development of strategies to treat tinnitus by activating autophagy.
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KEYWORD
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Tinnitus, Autophagy, ROS, Sensory hair cells, Ototoxicity
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