Longboard Pharmaceuticals, Inc. announced the initiation of a Phase 1 randomized, double-blind, placebo-controlled, SAD clinical study of LP659. LP659 is an oral, centrally acting, next-generation sphingosine-1-phosphate (S1P) receptor subtypes 1 and 5 modulator in development for the potential treatment of rare neuroinflammatory conditions. The primary objective of this Phase 1 randomized, double-blind, placebo-controlled, single-ascending dose clinical study is to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of LP659 in up to 48 healthy adult volunteers.