A T-cell play­er with back­ing from Roche takes next big step for BiTE drugs with 'on-of­f' switch to avoid tox­i­c­i­ty

The bis­pe­cif­ic T cell en­gager field is ab­solute­ly packed with big-name play­ers who have crowd­ed in de­spite some high-pro­file fail­ures in the class. Now, a Bay Area biotech thinks it may have the key to tack­ling BiTE tox­i­c­i­ty, us­ing an old “on-off switch” idea to give doc­tors more con­trol of the drugs’ ef­fect on pa­tients.

San Fran­cis­co-based So­te­ria Bio­ther­a­peu­tics un­cloaked Mon­day with a $42 mil­lion Se­ries A co-led by Roche Ven­ture Fund and 5AM Ven­tures with par­tic­i­pa­tion from the No­var­tis Ven­ture Fund to ad­vance its bis­pe­cif­ic T cell en­gagers with an “on-off” switch the founders think can avoid some of the dire safe­ty flags en­dem­ic to the class.

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