L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line.

L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line. Research Abstract Details 

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L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line. Abstract Text:

Wong-Kein Low,Li Sun,Michelle G K Tan,Alvin W C Chua,De-Yun Wang,

Conclusion. L-N-Acetylcysteine (L-NAC) significantly reduced reactive oxygen species (ROS) generation and cochlear cell apoptosis after irradiation. The safe and effective use of L-NAC in reducing radiation-induced sensorineural hearing loss (SNHL) should be verified by further in vivo studies. Objectives. Radiation-induced SNHL is a common complication after radiotherapy of head and neck tumours. There is growing evidence to suggest that ROS play an important role in apoptotic cochlear cell death from ototoxicity, resulting in SNHL. The aim of this study was to evaluate the effectiveness of L-NAC, an antioxidant, on radiation-induced apoptosis in cochlear cells. Materials and methods. The OC-k3 cochlear cell line was studied after 0 and 20 Gy of gamma-irradiation. Cell viability assay was performed using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide. Flow cytometry and TUNEL assay were done with and without the addition of 10 mmol/L of L-NAC. Intracellular generation of ROS was detected by 2',7'-dichlorofluorescein diacetate, with comparisons made using fluorescence intensity. Results. L-NAC increased the viability of cells after irradiation. Generation of ROS was demonstrated at 1 h post-irradiation and was significantly reduced by L-NAC (p<0.0001). Flow cytometry and TUNEL assay showed cell apoptosis at 72 h post-irradiation, which was diminished by the addition of L-NAC.

L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line. Publishing Authors By Initials

WK Low,L Sun,MG Tan,AW Chua,DY Wang,

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L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Acta oto-laryngologica

VOLUME: 128

Page Numbers: 440-5

Journal Abbreviation: Acta Otolaryngol.

ISSN: 0001-6489

DAY: 27

MONTH: Apr

YEAR: 2008

L-N-Acetylcysteine protects against radiation-induced apoptosis in a cochlear cell line. Information

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LANGUAGE: eng

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AFFILIATION: Departments of Otolaryngology, Singapore General Hospital, Singapore.

Country: Norway

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MEDLINETA: Acta Otolaryngol

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