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.
Original language | English (US) |
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Pages (from-to) | 210-225.e5 |
Journal | Cancer cell |
Volume | 41 |
Issue number | 1 |
DOIs | |
State | Published - Jan 9 2023 |
Keywords
- cell-free DNA
- chimeric antigen receptor T cells
- circulating tumor DNA
- ctDNA
- genomics
- immunotherapy
- large B cell lymphoma
- MRD
- oncology
- precision medicine
ASJC Scopus subject areas
- Oncology
- Cancer Research