** Shares of Spruce Biosciences SPRB.O rise 69% to $14.89 premarket
** Co says U.S. FDA grants "breakthrough therapy" tag for its experimental drug, tralesinidase alfa, to treat Sanfilippo Syndrome Type B
** The condition is a genetic disorder that causes progressive brain damage in children
** The breakthrough therapy tag is meant to speed up development and review of drugs to treat a serious condition or unmet medical need
** Co plans to submit application for U.S. approval in Q1 of 2026
** As of last close, stock down 72% YTD
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))