FAP and neoplasm: Similarly, the Nb-TriTE also redirected the cytotoxicity of T cells toward other human FAP-expressing tumor cells compared with Nb-BiTE, including U87 cells (EC50 1.5 nM vs. 5.19 nM) (Fig. 4D) and primary CAFs (EC50 0.85 nM vs. 17.48 nM) (Fig. 4E).