CAR T-cell therapy in highly aggressive B-cell lymphoma: emerging biological and clinical insights.

Recently, significant progress has been made in identifying novel therapies, beyond conventional immunochemotherapy strategies, with efficacy in B-cell lymphomas. One such approach involves targeting the CD19 antigen on B cells with autologous-derived chimeric antigen receptor (CAR) cells. This strategy is highly effective in patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL), as evidenced by recent regulatory approvals. Recent reports suggest that this is an effective strategy for high-grade B-cell lymphoma. The biological underpinnings of these entities and how they overlap with each other and DLBCL continue to be areas of intense investigation. Therefore, as more experience with CAR T-cell approaches is examined, it is interesting to consider how both tumor cell-specific and microenvironmental factors that define these highly aggressive subsets influence susceptibility to this approach.