A Nanoimprinted Photothermal Chip for On-Demand Spatiotemporal Activation of CRISPR/Cas9 Gene Editing.

Abstract

Precise control of gene editing in target cells is essential for CRISPR/Cas9 applications. Here, we present a nanoimprinted photothermal chip (NPC) engineered for on-demand delivery and activation of CRISPR/Cas9 complexes with high spatial and temporal precision. Fabricated by nanoimprint lithography and subsequent surface modification, NPC features a customized PEGylated plasmonic gold nanopillar array, which provides both optimal cellular adhesion and efficient photothermal conversion. Upon NIR irradiation, NPC generates spatially confined thermal microdomains that transiently permeabilizes cell membranes, thereby facilitating cytosolic delivery of CRISPR/Cas9 complexes and synchronously modulating genome-editing kinetics. In vitro studies demonstrate robust gene knockout in both mouse and sheep cell lines while preserving high cell viability and editing fidelity. Remarkably, NPC-mediated PD-1 gene disruption in cytotoxic T cells markedly enhance their antitumor activity. Overall, this work establishes NPC as a transformative platform for precise and controllable CRISPR/Cas9 gene editing with broad therapeutic potential.