BDKRB1 and glioblastoma: The blocking effects of the nonradiolabelled B1R antagonist R954 and agonist [des-Arg10]-kallidin on [111In]In-DOTA-Ahx-R954 accumulation were also higher in U87MG than in U251MG cells, indicating that the accumulation of [111In]In-DOTA-Ahx-R954 is specific to B1R in glioblastoma.