No CyclingLate this afternoon, Juno Therapeutics ($JUNO) announced (link to press release) that the FDA had put a clinical hold on enrollment into a phase 2 trial of their JCAR015 construct in relapsed refractory acute lymphoblastic leukaemia (ALL) in adults in the ROCKET Trial: NCT02535364.

The decision by the FDA was as a result of three recent patient deaths reported to be due to neurotoxicity. In after-hours trading the stock dropped 30% from a market close of $40.82, reaching an after hours low at time of writing of $26.66 at 4.43pm ET.

In this post we look at what happened, the possible reasons behind it, and what it may mean for other CAR T companies. A leading CAR-T cell expert also provided BSB with some commentary after the news broke.

Good News: Post now updated following FDA lifting hold on ROCKET trial.

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