Table 2. Transposon-based gene delivery efficiency into NK cells.

Cell source	Genetic modification system	Genetic material	Transfection efficiency	Reference
Human primary NK cells	TcB transposon system	CD19-CAR DNA	~25%	[36]
Human primary NK cells	TcB-M transposon system	CD19-CAR DNA	~50%	[37]
Human primary NK cells	SB11 transposon system	EGFP mRNA	~9%	[37]
Human primary NK cells	SB100X transposon system	EGFP mRNA	~15.2%	[37]
Human primary NK cells	SB100X transposon system	CD19-CAR DNA	~44%	[38]

Abbreviations: NK, natural killer; TcB; TcBuster; TcB-M, mutant TcB; CAR, chimeric antigen receptor.