Pieris slammed with FDA hold; Bio­gen adds PhIV for Spin­raza

→ Boston-based Pieris $PIRS has been forced to hit the brakes on a slate of Phase I stud­ies for its 4-1BB/HER2 fu­sion pro­tein drug PRS-343 af­ter the FDA hit the com­pa­ny with a par­tial hold. The biotech can con­tin­ue to dose pa­tients al­ready in the stud­ies, but can’t add pa­tients un­til af­ter it con­ducts “an ad­di­tion­al in-use and com­pat­i­bil­i­ty study of PRS-343 with var­i­ous in­fu­sion ma­te­ri­als un­der spe­cif­ic con­di­tions to con­firm suit­abil­i­ty of PRS-343 for ad­min­is­tra­tion in clin­i­cal set­tings.” The biotech says no ad­verse events were cit­ed and still plans to launch their Phase II pro­gram for the drug lat­er this year — pro­vid­ed the FDA can be sat­is­fied.  “We al­so re­main on track to present com­pre­hen­sive da­ta from both the monother­a­py and ate­zolizum­ab com­bi­na­tion phase 1 stud­ies at a med­ical con­fer­ence lat­er this year,” says CEO Stephen Yo­der. Their stock was down about 6% in morn­ing trad­ing Tues­day.

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