IGLV3-21^R110-directed bispecific antibodies activate T cells and promote killing in a high-risk subset of chronic lymphocytic leukemia.

ABSTRACT: We previously used a disease-specific B cell receptor (BCR) point mutation (IGLV3-21R110) for selective targeting of a highrisk subset of chronic lymphocytic leukemia (CLL) with chimeric antigen receptor (CAR) T cells. Since CLL is a disease of the elderly and a significant fraction of patients is not able to physically tolerate CAR T-cell treatment, we explored bispecific antibodies as an alternative for precision targeting of this tumor mutation. Heterodimeric IgG1-based antibodies consisting of a fragment crystallizable region (Fc) attached to both an anti-IGLV3-21R110 Fab and an anti-CD3 (UCHT1) single chain variable fragment (R110-bsAb) selectively killed cell lines engineered to express high levels of the neoepitope as well as primary CLL cells using healthy donor and CLL patient-der

SUBMITTER: Fischer C 

PROVIDER: S-EPMC12862307 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature