I thought some here might find this article interesting. I posted a few interesting excerpts from the article. http://www.bbc.com/news/health-42308341 An experimental drug, injected into spinal fluid, safely lowered levels of toxic proteins in the brain. The research team, at University College London, say there is now hope the deadly disease can be stopped. Experts say it could be the biggest breakthrough in neurodegenerative diseases for 50 years. The unstoppable death of brain cells in Huntington's leaves patients in permanent decline, affecting their movement, behaviour, memory and ability to think clearly. Huntington's is caused by an error in a section of DNA called the huntingtin gene. Normally this contains the instructions for making a protein, called huntingtin, which is vital for brain development. But a genetic error corrupts the protein and turns it into a killer of brain cells. The treatment is designed to silence the gene. But the principle that a gene, any gene affecting disease progression and susceptibility, can be safely modified in this way in humans is very exciting and builds momentum and confidence in pursuing these avenues for potential treatments."