Ag	Antigen
CAR	Chimeric antigen receptor
CD19 CAR	Human anti-CD19-specific scFv CAR
CD19 CAR-expressing T cells	CAR-T cells, CD19 CAR-tTRII-T cells, and CD19 CAR-tTRII-I7R-T cells
CD19 CAR-tTRII-I7R-T cells	Co-expressing both CD19 CAR and tTRII-I7R-T cells
CSR	Chimeric switch receptor
Group CAR-19	Mice receiving CD19 CAR-T cells
Group I7R	Mice receiving CD19 CAR-tTRII-I7R-T cells
Group tTRII	Mice receiving CD19 CAR-tTRII-T cells
IL	Interleukin
IU	International unit
NHL	Non-Hodgkin’s lymphoma
PBS	Phosphate-buffered saline
qRT-PCR	Quantitative reverse transcription-polymerase chain reaction
rh	Recombinant human
SMAD	Mothers against decapentaplegic homologs
TGF-β	Transforming growth factor-beta CD19
TME	Tumor microenvironment
TR	TGF-β receptor
tTRII	Dominant negative TRII
tTRII-expressing T cells	CD19 CAR-tTRII-T cells and CD19 CAR-tTRII-I7R-T cells
tTRII-I7R	TGF-β/IL-7 CSR