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- W2891370422 abstract "Noise is the most common occupational and environmental hazard, and noise-induced hearing loss (NIHL) is the second most common form of sensorineural hearing deficit. Although therapeutics that target the free-radical pathway have shown promise, none of these compounds is currently approved against NIHL by the United States Food and Drug Administration. The present study has demonstrated that tetrandrine (TET), a traditional Chinese medicinal alkaloid and the main chemical isolate of the Stephania tetrandra S. Moore herb, significantly attenuated NIHL in CBA/CaJ mice. TET is known to exert antihypertensive and antiarrhythmic effects through the blocking of calcium channels. Whole-cell patch-clamp recording from adult spiral ganglion neurons showed that TET blocked the transient Ca2+ current in a dose-dependent manner and the half-blocking concentration was 0.6 + 0.1 μM. Consistent with previous findings that modulations of calcium-based signaling pathways have both prophylactic and therapeutic effects against neural trauma, NIHL was significantly diminished by TET administration. Importantly, TET has a long-lasting protective effect after noise exposure (48 weeks) in comparison to 2 weeks after noise exposure. The otoprotective effects of TET were achieved mainly by preventing outer hair cell damage and synapse loss between inner hair cells and spiral ganglion neurons. Thus, our data indicate that TET has great potential in the prevention and treatment of NIHL." @default.
- W2891370422 created "2018-09-27" @default.
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- W2891370422 date "2018-09-05" @default.
- W2891370422 modified "2023-10-12" @default.
- W2891370422 title "Otoprotective Effects of Stephania tetrandra S. Moore Herb Isolate against Acoustic Trauma" @default.
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- W2891370422 doi "https://doi.org/10.1007/s10162-018-00690-3" @default.
- W2891370422 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6249158" @default.