Bob Holmes, writing for New Scientist on Gene therapy may switch off Huntington's:
Using gene therapy to switch off genes instead of adding new ones could slow down or prevent the fatal brain disorder Huntington's disease. The method, which exploits a mechanism called RNA interference, might also help treat a wide range of other inherited diseases.
This is one of many great treatments and therapies that are just over the horizon, if only we can keep the "moral" Right and "egalitarian" Left out of the way long enough to get there.