Abstract:
:Manganese (Mn) is an indispensable cofactor for many enzymes and a basic factor for many reproductive and metabolic pathways. However, exposure to high concentrations of Mn can result in deleterious effects on the central nervous system and peripheral nerves, including nerves associated with the auditory system. Based on our studies of cochlear organotypic cultures, Mn exposure induces a significant loss of hair cells (HCs), auditory nerve fibers (ANFs) and spiral ganglion neurons (SGNs) in a concentration-dependent manner. Additionally, N-acetylcysteine (NAC), a glutathione (GSH) provider and a direct scavenger of reactive oxygen species (ROS), clearly decreases Mn-induced ROS accumulation, caspase-3 activation and TUNEL staining, which indicate increased cell survival. Based on these results, Mn exposure exerts ototoxic and neurotoxic effects on the auditory system. Furthermore, 20mM NAC may prevent 1mM Mn-induced hair cell loss and axonal degeneration, indicating that NAC could be a promising drug for clinical applications.
journal_name
Toxicol Lettjournal_title
Toxicology lettersauthors
Wang W,Li D,Ding X,Zhao Q,Chen J,Tian K,Qiu Y,Lu Ldoi
10.1016/j.toxlet.2017.07.903subject
Has Abstractpub_date
2017-09-05 00:00:00pages
77-86eissn
0378-4274issn
1879-3169pii
S0378-4274(17)31158-Xjournal_volume
279pub_type
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