This is done by changing the mythelisation of DNA. If we can do this in a whole body with drugs, we have the key to cure cancer—effective and with much less side effects than ever before.
http://www.nature.com/ncomms/2015/150311/ncomms7513/full/ncomms7513.html
http://news.stanford.edu/news/2015/march/ant-man-alvarado-031115.html
http://www.mcgill.ca/newsroom/channels/news/honey-i-shrunk-ants-how-environment-controls-size-243448