Here is some info about gene therapy. It is more focused on preventing hearing loss from what I can tell, the link is in Dutch though... Not sure how much progress they are making
https://www.uantwerpen.be/nl/overua...ngen/wat-kan-u-steunen/gentherapie-binnenoor/
Also this:
http://www.otonomy.com/pipeline/hearing-loss-programs/
https://www.uantwerpen.be/nl/overua...ngen/wat-kan-u-steunen/gentherapie-binnenoor/
Also this:
http://www.otonomy.com/pipeline/hearing-loss-programs/