A gene editing technique shows promise for lowering LDL cholesterol 

It’s a potential onetime treatment for those with a disorder that raises LDL levels in the blood

An illustration of a blood vessel partially clogged with yellow plaque.

High levels of cholesterol can lead to fatty plaques (one illustrated, yellow) inside arteries that can restrict blood flow. A new experimental gene-editing drug can lower the level of “bad” LDL cholesterol in the blood.

KATERYNA KON/SCIENCE PHOTO LIBRARY/GETTY IMAGES

PHILADELPHIA ­— Ten patients enrolled in the experimental drug trial, and they were the sickest of the sick.