Abbvie Inc. is shelling out up to $2.1 billion to acquire CAR T player Capstan Therapeutics Inc., gaining rights to a phase I-stage program targeting CD19 as well as an in vivo cell engineering platform. The announcement comes on the heels of recently published data detailing Capstan’s delivery approach using targeted lipid nanoparticles (tLNPs) and marks Abbvie’s latest foray into the CAR T space.