Switching Off Lactose Intolerance... Someday
Lactose intolerance is caused by a gene turning off the production of the lactase enzyme that digests lactose. Simple as that.
That has led many people to wonder whether switching off that signal in the cells that manufacture lactase would lead to permanent lactase production.
In fact, a few years ago Dr. Matthew During of the Central Nervous System Gene Therapy Center at Thomas Jefferson University in Philadelphia did a series of experiments on rats that accomplished exactly that. See my article on his work.
He was researching toward a breakthrough in diabetes, though, so don't expect to see a cure for LI any time soon.
I mention all this because Scientific American just published a nifty explanation of how scientists do cell-switching, with lactose digestion leading to the understanding of just how to do it.
50 years ago.
Oh well, at least they're still working on it. Maybe someday.