Roche (OTCQX: RHHBY) has announced that its investigational anti-amyloid beta antibody gantenerumab for Alzheimer’s disease received breakthrough therapy designation from FDA.  The agency has granted the status to a range of investigational Alzheimer’s, including lecanemab from Eisai and Biogen and donanemab from Eli Lilly. Biogen’s aducanumab had also received the designation before FDA approved it in…