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Sequential Exposure to Interleukin-21 and Interleukin-15 During Human Natural Killer Cell Expansion Optimizes Yield and Function

ABSTRACT: Sequential Exposure to Interleukin-21 and Interleukin-15 During Human Natural Killer Cell Expansion Optimizes Yield and Function

PROVIDER: PRJNA981161 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24866500_1.fastq.gz	Fastqsanger.gz
	SRR24866500_2.fastq.gz	Fastqsanger.gz
	SRR24866501_1.fastq.gz	Fastqsanger.gz
	SRR24866501_2.fastq.gz	Fastqsanger.gz
	SRR24866474_1.fastq.gz	Fastqsanger.gz

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Sequential Exposure to Interleukin-21 and Interleukin-15 During Human Natural Killer Cell Expansion Optimizes Yield and Function

Project description:NK cells are frequently expanded for the clinic using irradiated engineered K562 feeder cells expressing a core transgene set of membrane-bound mb IL-15 and/or mbIL-21 together with 41BBL. Prior comparisons of mbIL-15 to mbIL-21 for NK expansion lack comparisons of key attributes of the resulting NK cells including their high dimensional phenotype, polyfunctionality, the breadth and potency of cytotoxicity, cellular metabolism, and activity in xenograft tumor models. Moreover, despite multiple rounds of K562 stimulation, studies of sequential use of mbIL-15- and mbIL-21-based feeder cells are absent. We addressed these gaps and found that using mbIL-15 versus mbIL-21-based feeder cells drove distinct phenotypic and functional profiles. Feeder cells expressing mbIL-15 alone drove superior functionality by nearly all measures, while those expressing mbIL-21 alone drove superior yield. In combination, most attributes resembled those imparted by mbIL-21, whereas in sequence NK yield approximated that imparted by the first cytokine, and the phenotype, transcriptome, and function resembled that driven by the second cytokine highlighting the plasticity of NK cell differentiation. The sequence mbIL-21 followed by mbIL-15 was especially advantageous in achieving significant yields of highly functional NK cells that demonstrated equivalent in vivo activity to those expanded by mbIL-15 alone in 2 of 3 xenograft models. Our findings define the impact of mbIL-15 versus mbIL-21 during NK expansion and reveal a previously under appreciated tradeoff between NK yield and function for which sequential use of mbIL-21- followed by mbIL-15-based feeder cells may be the optimal approach in many settings.

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