Determinants of resistance to engineered T cell therapies targeting CD19 in large B cell lymphomas

Cancer Cell. 2023 Jan 9;41(1):210-225.e5. doi: 10.1016/j.ccell.2022.12.005. Epub 2022 Dec 29.

Abstract

Most relapsed/refractory large B cell lymphoma (r/rLBCL) patients receiving anti-CD19 chimeric antigen receptor (CAR19) T cells relapse. To characterize determinants of resistance, we profiled over 700 longitudinal specimens from two independent cohorts (n = 65 and n = 73) of r/rLBCL patients treated with axicabtagene ciloleucel. A method for simultaneous profiling of circulating tumor DNA (ctDNA), cell-free CAR19 (cfCAR19) retroviral fragments, and cell-free T cell receptor rearrangements (cfTCR) enabled integration of tumor and both engineered and non-engineered T cell effector-mediated factors for assessing treatment failure and predicting outcomes. Alterations in multiple classes of genes are associated with resistance, including B cell identity (PAX5 and IRF8), immune checkpoints (CD274), and those affecting the microenvironment (TMEM30A). Somatic tumor alterations affect CAR19 therapy at multiple levels, including CAR19 T cell expansion, persistence, and tumor microenvironment. Further, CAR19 T cells play a reciprocal role in shaping tumor genotype and phenotype. We envision these findings will facilitate improved chimeric antigen receptor (CAR) T cells and personalized therapeutic approaches.

Keywords: MRD; cell-free DNA; chimeric antigen receptor T cells; circulating tumor DNA; ctDNA; genomics; immunotherapy; large B cell lymphoma; oncology; precision medicine.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antigens, CD19 / genetics
  • Humans
  • Immunotherapy, Adoptive / methods
  • Lymphoma, Large B-Cell, Diffuse* / drug therapy
  • Lymphoma, Large B-Cell, Diffuse* / therapy
  • Neoplasm Recurrence, Local / drug therapy
  • Receptors, Chimeric Antigen* / genetics
  • T-Lymphocytes
  • Tumor Microenvironment

Substances

  • Receptors, Chimeric Antigen
  • Antigens, CD19