Despite positive findings from an earlier trial, Alto Neuroscience Inc.’s BDNF-targeting candidate, ALTO-100, failed to best placebo in a phase IIb study in major depressive disorder, sending shares of the company to their lowest price since going public in a February 2024 IPO, as investors worried about readthrough to Alto’s biomarker-based approach for treating psychiatric disorders.
The discussion that preceded the June 4 U.S. FDA advisory committee vote against the approval of Lykos Therapeutics Inc.’s midomafetamine as a treatment for post-traumatic stress disorder could shine some light on the way forward for other sponsors developing psychedelics for approved medical use.
Alto Neuroscience Inc.’s start this spring of the phase II double-blind, single- and multiple-dose study to test the pharmacodynamics of ALTO-203 in major depressive disorder represents another stake planted in a notoriously difficult indication. But getting attention as well is the push by Los Altos, Calif.-based Alto in post-traumatic stress disorder (PTSD) with a separate compound.
