Promising results from very early studies with an experimental new cholesterol-lowering drug, a monoclonal antibody to PCSK9, have been??published in the??New England??Journal of Medicine. Evan Stein and colleagues report the results of two single-dose studies in which the drug, REGN727, was administered intravenously and subcutaneously to healthy subjects. In a third, randomized, placebo-controlled, dose-ranging trial, ...