Tsien and colleagues say that their genetic intervention succeeded in erasing memories in the long-term, but in the mouse world, long-term means two weeks.

And one day the data might lead to the development of genetic tests to predict whether a person can expect to live into old age as well as guide intervention efforts to prevent age-related illness.

Families who learn they are at genetic risk might seek medical intervention sooner. Others may adopt lifestyle changes to try to lower their risk.