MART-1 TCR gene-modified peripheral blood T cells for the treatment of metastatic melanoma: a phase I/IIa clinical trial

M W Rohaan, R Gomez-Eerland, J H van den Berg, M H Geukes Foppen, M van Zon, B Raud, I Jedema, S Scheij, R de Boer, N A M Bakker, D van den Broek, L M Pronk, L G Grijpink-Ongering, A Sari, R Kessels, M van den Haak, H A Mallo, M Karger, B A van de Wiel, C L ZuurC W Duinkerken, F Lalezari, J V van Thienen, S Wilgenhof, C U Blank, J H Beijnen, B Nuijen, T N Schumacher, J B A G Haanen

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

BACKGROUND: Adoptive cell therapy with peripheral blood T cells expressing transgenic T-cell receptors (TCRs) is an innovative therapeutic approach for solid malignancies. We investigated the safety and feasibility of adoptive transfer of autologous T cells expressing melanoma antigen recognized by T cells 1 (MART-1)-specific TCR, cultured to have less differentiated phenotypes, in patients with metastatic melanoma.

MATERIALS AND METHODS: In this phase I/IIa trial, peripheral blood T cells from HLA-A2∗02:01-positive patients with unresectable stage IIIC/IV melanoma expressing MART-1 were selected and stimulated with anti-CD3/CD28 beads, transduced with a modified MART-1(26-35)-specific 1D3 TCR (1D3HMCys) and expanded in interleukin (IL)-7 and IL-15. Patients received a single infusion of transgenic T cells in a dose-escalating manner. Feasibility, safety and objective response rate were assessed.

RESULTS: Twelve pretreated metastatic cutaneous (n = 7) and uveal (n = 5) melanoma patients were included. Patient 1 received 4.6 × 109 1D3HMCys T cells and experienced grade 5 toxicity after 9 days. Subsequent patients received 5.0 × 107 [n = 3; cohort (c) 2], 2.5 × 108 (n = 2; c3) and 1.0 × 108 (n = 6; c4) 1D3HMCys T cells. The study was prematurely terminated because of dose-dependent toxicity, concerning skin (10/12), eyes (3/12), ears (4/12) and cytokine release syndrome (5/12), with 7 patients experiencing grade 3-5 toxicity. Partial responses were seen in 2/11 (18%) assessable patients and persistence of 1D3HMCys T cells corresponded to infused cell dose.

CONCLUSIONS: Production of TCR-modified cells as described leads to highly potent T cells. Partial responses were seen in 18% of patients with dose-dependent 'on-target, off-tumor' toxicity and a maximum tolerated dose of 1.0 × 108 cells.

Original languageEnglish
Article number100089
JournalImmuno-Oncology and Technology
Volume15
DOIs
Publication statusPublished - Sept 2022
Externally publishedYes

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