Cited by 1,512CAR-T cell therapy researchVirus-based gene therapy researchCRISPR and Genetic Engineering

Inducible Apoptosis as a Safety Switch for Adoptive Cell Therapy

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Di Stasi, Antonio, Tey, Siok-Keen, Dotti, Gianpietro, Fujita, Yuriko, Kennedy-Nasser, Alana, Martinez, Caridad, Straathof, Karin, Liu, Enli +12 more·2011·New England Journal of Medicine

Abstract

BACKGROUND: Cellular therapies could play a role in cancer treatment and regenerative medicine if it were possible to quickly eliminate the infused cells in case of adverse events. We devised an inducible T-cell safety switch that is based on the fusion of human caspase 9 to a modified human FK-binding protein, allowing conditional dimerization. When exposed to a synthetic dimerizing drug, the inducible caspase 9 (iCasp9) becomes activated and leads to the rapid death of cells expressing this construct. METHODS: We tested the activity of our safety switch by introducing the gene into donor T cells given to enhance immune reconstitution in recipients of haploidentical stem-cell transplants. Patients received AP1903, an otherwise bioinert small-molecule dimerizing drug, if graft-versus-host disease (GVHD) developed. We measured the effects of AP1903 on GVHD and on the function and persistence of the cells containing the iCasp9 safety switch. RESULTS: Five patients between the ages of 3 and 17 years who had undergone stem-cell transplantation for relapsed acute leukemia were treated with the genetically modified T cells. The cells were detected in peripheral blood from all five patients and increased in number over time, despite their constitutive transgene expression. A single dose of dimerizing drug, given to four patients in whom GVHD developed, eliminated more than 90% of the modified T cells within 30 minutes after administration and ended the GVHD without recurrence. CONCLUSIONS: The iCasp9 cell-suicide system may increase the safety of cellular therapies and expand their clinical applications. (Funded by the National Heart, Lung, and Blood Institute and the National Cancer Institute; ClinicalTrials.gov number, NCT00710892.).

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Crossref · 10.1056/nejmoa1106152

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  • Multiple chemical-genetic systems have been devised to enable tunable regulation of protein stability using small molecules, including FKBP12-based destabilization domains, auxin-inducible degrons and SMASh.

    “Multiple chemical–genetic systems have been devised to enable tunable regulation of protein stability using small molecules194, including FKBP12-based destabilization domains195, auxin-inducible degrons196 and small-molecule-assisted shutoff (SMASh)197.”

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Authors
Di Stasi, A., Tey, S.-K., Dotti, G., Fujita, Y., Kennedy-Nasser, A., Martinez, C., Straathof, K., Liu, E., Durett, A. G., Grilley, B., Liu, H., Cruz, C. R., Savoldo, B., Gee, A. P., Schindler, J., Krance, R. A., Heslop, H. E., Spencer, D. M., Rooney, C. M., & Brenner, M. K.
Affiliations
  • Houston Methodist (US)
  • The University of Texas Southwestern Medical Center (US)
Venue
New England Journal of Medicine
Published
2011-11-03
Volume
365
Issue
18
Pages
1673-1683
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2122465970
Cited by
1,512
References
31
Citations by year
2026: 112 · 2025: 83 · 2024: 81 · 2023: 83 · 2022: 97 · 2021: 108 · 2020: 115 · 2019: 104 · 2018: 91 · 2017: 128 · 2016: 107 · 2015: 133 · 2014: 86 · 2013: 100 · 2012: 76
FWCI
42.25
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • National Heart, Lung, and Blood Institute (U54HL081007, U54HL08100)
  • National Cancer Institute (P01CA094237, P30CA125123, K12CA090433, P50CA126752)
Topics
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
Keywords
caspase-9, graft-versus-host disease, adoptive T cell therapy, haploidentical hematopoietic stem cell transplantation, relapsed acute leukemia, pediatric patients, cell suicide
MeSH terms
Adolescent, Child, Child, Preschool, Female, Graft vs Host Disease, Humans, Leukemia, Male, Organic Chemicals, Recurrence, T-Lymphocytes, Immunotherapy, Adoptive, Apoptosis, Gene Transfer Techniques, Tacrolimus Binding Proteins, Stem Cell Transplantation, Genes, Transgenic, Suicide, Caspase 9

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