基因敲除
RNA干扰
小干扰RNA
信使核糖核酸
细胞生物学
小发夹RNA
免疫系统
T细胞
癌症研究
生物
化学
核糖核酸
基因
免疫学
生物化学
作者
Alex G. Hamilton,Kelsey L. Swingle,Ryann A Joseph,David Mai,Ningqiang Gong,Margaret M. Billingsley,Mohamad-Gabriel Alameh,Drew Weissman,Neil C. Sheppard,Carl H. June,Michael J. Mitchell
标识
DOI:10.1002/adhm.202301515
摘要
The programmed cell death protein 1 (PD-1) signaling pathway is a major source of dampened T cell activity in the tumor microenvironment. While clinical approaches to inhibiting the PD-1 pathway using antibody blockade have been broadly successful, these approaches lead to widespread PD-1 suppression, increasing the risk of autoimmune reactions. This study reports the development of an ionizable lipid nanoparticle (LNP) platform for simultaneous therapeutic gene expression and RNA interference (RNAi)-mediated transient gene knockdown in T cells. In developing this platform, interesting interactions are observed between the two RNA cargoes when co-encapsulated, leading to improved expression and knockdown characteristics compared to delivering either cargo alone. This messenger RNA (mRNA)/small interfering RNA (siRNA) co-delivery platform is adopted to deliver chimeric antigen receptor (CAR) mRNA and siRNA targeting PD-1 to primary human T cells ex vivo and strong CAR expression and PD-1 knockdown are observed without apparent changes to overall T cell activation state. This delivery platform shows great promise for transient immune gene modulation for a number of immunoengineering applications, including the development of improved cancer immunotherapies.
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