Interleukin-15-armoured GPC3 CAR T cells for patients with solid cancers

David Steffin, Nisha Ghatwai, Antonino Montalbano, Purva Rathi, Amy N. Courtney, Azlann B. Arnett, Julien Fleurence, Ramy Sweidan, Tao Wang, Huimin Zhang, Prakash Masand, John M. Maris, Daniel Martinez, Jennifer Pogoriler, Navin Varadarajan, Sachin G. Thakkar, Deborah Lyon, Natalia Lapteva, Mei Zhuyong, Kalyani PatelDolores Lopez-Terrada, Carlos A. Ramos, Premal Lulla, Tannaz Armaghany, Bambi J. Grilley, Stephen Gottschalk, Gianpietro Dotti, Leonid S. Metelitsa, Helen E. Heslop, Malcolm K. Brenner, Pavel Sumazin, Andras Heczey

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Interleukin-15 (IL-15) promotes the survival of T lymphocytes and enhances the antitumour properties of chimeric antigen receptor (CAR) T cells in preclinical models of solid neoplasms in which CAR T cells have limited efficacy1, 2, 3–4. Glypican-3 (GPC3) is expressed in a group of solid cancers5, 6, 7, 8, 9–10, and here we report the evaluation in humans of the effects of IL-15 co-expression on GPC3-expressing CAR T cells (hereafter GPC3 CAR T cells). Cohort 1 patients (NCT02905188 and NCT02932956) received GPC3 CAR T cells, which were safe but produced no objective antitumour responses and reached peak expansion at 2 weeks. Cohort 2 patients (NCT05103631 and NCT04377932) received GPC3 CAR T cells that co-expressed IL-15 (15.CAR), which mediated significantly increased cell expansion and induced a disease control rate of 66% and antitumour response rate of 33%. Infusion of 15.CAR T cells was associated with increased incidence of cytokine release syndrome, which was controlled with IL-1/IL-6 blockade or rapidly ameliorated by activation of the inducible caspase 9 safety switch. Compared with non-responders, tumour-infiltrating 15.CAR T cells from responders showed repression of SWI/SNF epigenetic regulators and upregulation of FOS and JUN family members, as well as of genes related to type I interferon signalling. Collectively, these results demonstrate that IL-15 increases the expansion, intratumoural survival and antitumour activity of GPC3 CAR T cells in patients.

Original languageEnglish (US)
Article number550
Pages (from-to)940-946
Number of pages7
JournalNature
Volume637
Issue number8047
DOIs
StatePublished - Jan 23 2025

Keywords

  • Humans
  • Interleukin-15/metabolism
  • Glypicans/metabolism
  • Neoplasms/immunology
  • T-Lymphocytes/immunology
  • Female
  • Male
  • Receptors, Chimeric Antigen/immunology
  • Immunotherapy, Adoptive
  • Middle Aged
  • Cohort Studies
  • Adult
  • Aged
  • Cytokines/metabolism
  • Cell Proliferation

ASJC Scopus subject areas

  • General

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