{"database":"GEO","file_versions":[{"headers":{"Content-Type":["application/json"]},"body":{"files":{"Other":["ftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE301nnn/GSE301774/"]},"type":"primary"},"statusCode":"OK","statusCodeValue":200}],"scores":null,"additional":{"omics_type":["Transcriptomics"],"species":["Homo sapiens"],"gds_type":["Expression profiling by high throughput sequencing"],"full_dataset_link":["https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE301774"],"repository":["GEO"],"entry_type":["GSE"],"additional_accession":[]},"is_claimable":false,"name":"Engineering a Reversible Plant Hormone–Inducible ON-Switch Boosts Safety and Potency of CAR-T Cell Immunotherapy","description":"The ability to externally regulate chimeric antigen receptor (CAR) activity via small molecules offers a promising strategy to enhance the safety and precision of adoptive T cell therapies. We present a novel inducible ON-switch CAR design that leverages plant hormone signaling components to achieve controllable T cell activation. Specifically, we engineered a receptor system that integrated the plant auxin receptor IAA7 and its co-receptor AFB1, enabling ligand-dependent interactions in response to the plant hormone auxin. Our results demonstrated that this auxin-inducible CAR (auxCAR) mediated rapid, reversible, and dose-dependent T cell activation, leading to potent cytotoxicity against Raji B-cell lymphoma in vitro and in vivo. Notably, auxCAR-T cells maintained a favorable memory T cell phenotype and exhibited reduced exhaustion markers compared with conventional CAR-T cells, translating into improved therapeutic efficacy. This plant hormone-based control system offers a versatile and orthogonal approach for precise modulation of CAR activity, with significant implications for the development of safer, more adaptable immunotherapies.","dates":{"publication":"2026/07/05"},"accession":"GSE301774","cross_references":{"GSM":["GSM9089519","GSM9089516","GSM9089517","GSM9089518"],"GPL":["34284"],"GSE":["301774"],"taxon":["Homo sapiens"],"PMID":["[42579307]"]}}