Bayer backs out of CAR T collab with Atara Biotherapeutics

20 May 2022

German pharma major Bayer (BAYN: DE) has ended a collaboration with Atara Biotherapeutics (Nasdaq: ATRA), which was based around its novel allogeneic EBV T-cell platform.

Atara, which focuses on T-cell immunotherapies, was working with Bayer to develop therapies for patients with cancer and autoimmune diseases, including mesothelin-directed CAR T-cell treatments.

However, the American firm was struck with bad news earlier in the year, when a fatal serious adverse event (SAE) occurred in a Phase I trial of the autologous mesothelin CAR T, ATA2271.

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